Opel Insignia: Diagnostic Information and Procedures

Opel Insignia B 2018-2024 Service Manual / Transmission / Automatic Transmission - Aisin AF50-8 (MRC) / Diagnostic Information and Procedures

DTC P0218

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0218

Transmission Fluid Overtemperature - Hydraulic/Mechanical Problem

Circuit/System Description

For an overview of the component/system, refer to Electronic Component Description The transmission control module monitors the transmission fluid temperature sensor to determine an overtemperature condition.

Conditions for Running the DTC

Condition 1

DTC P0711, P0712, P0713 = Not set
Ignition Voltage=9 to 32 V
Vehicle Speed=Less than 180 km/h (112 MPH)

Frequency the DTC runs=Continuously - After the running conditions are met

Condition 2

DTC P0711, P0712, P0713 = Not set
Ignition Voltage=9 to 32 V
Vehicle Speed=Greater than 180 km/h (112 MPH)

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

Condition 1

Transmission Fluid Temperature=Warmer than 150ÂºC (302ÂºF) - For greater than 10 s

Condition 2

Transmission Fluid Temperature=Warmer than 150ÂºC (302ÂºF) - For greater than 60 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type C DTC

Driver Information Display=Transmission Hot - Idle Engine

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type C DTC

Diagnostic Aids

Obtain additional information from the customer to determine if the vehicle has been modified, damaged or operated in any of the following conditions, which can cause the transmission to overheat:

Driving in hot climates
Driving in extreme off-road conditions
Tow/haul capacity exceeded
Towing in the incorrect gear

Reference Information

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Verify the scan tool Freeze Frame/Failure Records parameter: ECT Sensor=Colder than 125ÂºC (257ÂºF)

If 125ÂºC (257ÂºF) or warmer

Refer to: Engine Overheating

Go to next step: If colder than 125ÂºC (257ÂºF)

2. Verify the condition does not exist: Incorrect fluid level or condition - Transmission - Refer to Transmission Fluid Level and Condition Check

If a condition exists

Repair or replace as necessary.

Go to next step: If no condition exists

3. Verify the condition does not exist: Overheating - Transmission - Refer to: Transmission Overheats

If a condition exists

Repair or replace as necessary.

Go to next step: If no condition exists

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If any DTC is set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

Go to next step: If no DTC is set

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Transmission Fluid Drain and Fill
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0601, P0602, P0603, or P0604

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0601

Control Module Read Only Memory Performance

DTC P0602

Control Module Not Programmed

DTC P0603

Control Module Long Term Memory Reset

DTC P0604

Control Module Random Access Memory Performance

Circuit/System Description

For an overview of the component/system, refer to Electronic Component Description This diagnostic applies to microprocessor integrity conditions within the control module. This diagnostic also checks if the control module is not programmed, or is programmed incorrectly.

Conditions for Running the DTC

Ignition Voltage=On

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

P0601

ROM Malfunction

P0602

Programming Malfunction

P0603

EEPROM Performance/Malfunction

P0604

RAM Malfunction

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Verify DTC P0601, P0602, P0603, P0604 is not set.

If the DTC is set

Perform all necessary programming and setup procedures for the control module:K71 Transmission Control Module
Verify the DTC does not set.
- If the DTC sets - Replace the component:K71 Transmission Control Module
- Go to next step: If the DTC is not set
All OK.

Go to next step: If the DTC is not set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0606, P177F, P2637, or P2638

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0606

Control Module Processor Performance

DTC P177F

Detected Gear Incorrect

DTC P2637

Torque Increase Calculation Malfunction

DTC P2638

Breaking Torque Calculation Malfunction

Circuit/System Description

For an overview of the component/system, refer to Electronic Component Description

Conditions for Running the DTC

P0606Condition 1

Engine=Running - For greater than 10 min

Frequency the DTC runs=Continuously - After the running conditions are met

Condition 2

K71 Transmission Control Module=During control module power down

Frequency the DTC runs=Continuously - After the running conditions are met

P177F

DTC P0606 = Not set

Frequency the DTC runs=Continuously - After the running conditions are met

P2637

Engine=Running

Frequency the DTC runs=Continuously - After the running conditions are met

P2638

Ignition=On

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

P0606Condition 1

K71 Transmission Control Module=Internal Malfunction

Condition 2

Pressure Control Solenoid Valve=Commanded state does not match the actual state

P177F

Commanded gear=Incorrect - Engine Overspeed

P2637

Requested Torque Signal=Greater than a predefined threshold - For greater than 1 s

P2638

Automatic Braking Torque=Greater than a predefined threshold

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC - Exceptions listed below

DTC P2637=Type B

One or more of the following may occur:

K71 Transmission Control Module=Reset
Transmission gear allowed=3rd Gear
TCM Requested Torque=0 Nm (0 lb ft)

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A - Exceptions listed below

DTC P2637=Type B

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Verify DTC P0606, P177F, P2637, P2638 is not set.

If the DTC is set

Perform all necessary programming and setup procedures for the control module:K71 Transmission Control Module
Verify the DTC does not set.
- If the DTC sets - Replace the component:K71 Transmission Control Module
- Go to next step: If the DTC is not set
All OK.

Go to next step: If the DTC is not set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification.

For control module replacement, programming, and setup: Refer to Control Module: References.

DTC P0657

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions

DTC Descriptor

DTC P0657

Actuator High Control Circuit Group 1

Circuit/System Description

Conditions for Running the DTC

K71 Transmission Control Module=Communication Enabled

Conditions for Setting the DTC

K71 Transmission Control Module=Internal Malfunction

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Verify DTC P0657 is not set.

If the DTC is set

Perform all necessary programming and setup procedures for the control module:K71 Transmission Control Module
Verify the DTC does not set.
- If the DTC sets - Replace the component:K71 Transmission Control Module
- Go to next step: If the DTC is not set
All OK.

Go to next step: If the DTC is not set

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0705, P0707, P0708, or P0851

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

NOTE: This procedure may also diagnose malfunctions that are not detected by a DTC.

DTC P0705

Transmission Range Switch Circuit

DTC P0707

Transmission Range Switch Circuit Low Voltage

DTC P0708

Transmission Range Switch Circuit High Voltage

DTC P0851

Park/Neutral Position Switch Circuit Low Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Transmission Range Switch

Automatic Transmission

Park/Neutral Position Switch

Automatic Transmission

Circuit/System Description

Automatic Transmission

P0705, P0707, P0708

The sensor is an input to the control module K71. The control module K71 uses the information from the sensor signal B182 to determine what transmission gear range the vehicle operator selected.

The control module uses this data, along with other data, to adjust or control the following:

Q23 Line Pressure Control Solenoid Valve
Q27A Pressure Control Solenoid Valve 1
Q27B Pressure Control Solenoid Valve 2
Q27C Pressure Control Solenoid Valve 3
Q27D Pressure Control Solenoid Valve 4
Q27E Pressure Control Solenoid Valve 5
Q27F Pressure Control Solenoid Valve 6
Q27G Pressure Control Solenoid Valve 7{ If equipped }
Q32A Shift Solenoid Valve 1
Q32B Shift Solenoid Valve 2
Q39A Torque Converter Clutch Pressure Control Solenoid Valve

P0851

The sensor is an input to the control module K20.

The control module uses this data, along with other data, to adjust or control the following: KR27 Starter Relay

Conditions for Running the DTC

P0705, P0707, P0708

DTC P0851 = Not set
K71 Transmission Control Module=Communication Enabled
Ignition Voltage=10 to 16 V
Service Mode=Disabled

Frequency the DTC runs=Continuously - After the running conditions are met

P0851

Engine Torque= Greater than 75 Nm (55 lb ft)
Ignition Voltage=10 to 16 V
Selector Lever Position= P or N
Throttle Position Sensor=Greater than 8%
Vehicle Speed=Greater than 10 km/h (6 MPH)

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

P0705

Position 1 & Position 2=Not between 4.71 and 5.29 V - For greater than 1 s & For 2 consecutive events.

P0707

Position 1orPosition 2=Less than 0.127 V - For greater than 1 s & For 2 consecutive events.

P0708

Position 1orPosition 2=Greater than 4.87 V - For greater than 1 s & For 2 consecutive events.

P0851

Engine Control Module - Vehicle Speed Detected=Greater than 10 km/h (6 MPH) & Park/Neutral Position Switch=Park/Neutral - For greater than 2 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC - Exceptions listed below - Additional actions taken:

Transmission Learn=Disabled
Transmission gear allowed=3rd Gear - After a stop
Engine Cranking=Disabled

DTC P0851=Type C DTC

Engine Cranking=Disabled

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC - Exceptions listed below

DTC P0851=Type C DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Description and Operation

Refer to Electronic Component Description
Refer to Transmission General Description

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Verify there are no DTCs set related to the following system/component:K173 Transmission Range Control Module - If equipped

If any DTC is set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

Go to next step: If no DTC is set

3. Transmission - Park

4. Verify the scan tool parameter: Park/Neutral Position Switch@K20 Engine Control Module=Park

If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

5. Transmission - Neutral - Brake Applied

6. Verify the scan tool parameter:Park/Neutral Position Switch@K20 Engine Control Module=Neutral

If not the specified state

Refer to Circuit/System Testing

7. Transmission - Park

8. Verify the scan tool parameter: Transmission Range Switch@K71 Transmission Control Module=Park

If not the specified state

Replace the component: K71 Transmission Control Module

Go to next step: If the specified state

9. Operate the component: S3 Transmission Shift Lever

Verify the scan tool parameter: Transmission Range Switch=Matches the selector lever position

If not the specified state

Replace the component:K71 Transmission Control Module

Go to next step: If the specified state

10. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

11. All OK.

Circuit/System Testing

NOTE: Circuit/System Verification must be performed before proceeding with Circuit/System Testing.

1. Ignition/Vehicle & All vehicle systems - Off.

2. Disconnect the electrical connector:X1 @K71 Transmission Control Module.

3. Ignition - On / Vehicle - In Service Mode.

4. Test for greater than 9 V between the test points: Signal circuit terminal 5 & Ground.

If less than 9 V

Disconnect the electrical connector:X1@K20 Engine Control Module
Test for infinite resistance between the test points: Signal circuit terminal 5@Component harness & Ground
- If less than infinite resistance
  Repair the short to ground on the circuit.
- Go to next step: If infinite resistance
Test for less than 2 ohms between the test points:
- If 2 ohms or greater
  Repair the open/high resistance in the circuit.
- If less than 2 ohms
  Replace the component:K20 Engine Control Module

Go to next step: If greater than 9 V

5. Ignition/Vehicle - Off.

6. Test for less than 1 V between the test points: Signal circuit terminal 5@Component harness & Ground.

If 1 V or greater

Repair the short to voltage on the circuit.

Go to next step: If less than 1 V

7. Test or replace the component: Park/Neutral Position Switch

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Transmission Control Module Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0711-P0713

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0711

Transmission Fluid Temperature Sensor Performance

DTC P0712

Transmission Fluid Temperature Sensor Circuit Low Voltage

DTC P0713

Transmission Fluid Temperature Sensor Circuit High Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Transmission Fluid Temperature

Automatic Transmission

Circuit/System Description

For an overview of the component/system, refer to Transmission General Description

Automatic Transmission

The sensor is an input to the control module K71. The input signal is used to determine the temperature of the fluid: Transmission

The control module uses this data, along with other data, to adjust or control the following:

Driver Alert Indicator - Transmission Hot - Idle Engine
Line Pressure
Torque Converter Clutch
Transmission Adaptive Values Learn
Transmission Hot Mode
Transmission Shifting

Conditions for Running the DTC

P0711

DTC P0705, P0707, P0708, P0712, P0713 = Not set
Engine Speed= Greater than 400 RPM
Ignition Voltage=9 to 32 V
Fail-Safe Mode=Inactive
K71 Transmission Control Module= Communication Enabled
Service Mode=Disabled

Frequency the DTC runs=Continuously - After the running conditions are met - For greater than 2 s

P0712

Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously - After the running conditions are met - For greater than 2 s

P0713

DTC P0705, P0707, P0708 = Not set
Engine Speed= Greater than 400 RPM
Ignition Voltage=9 to 32 V
Transmission Range= Drive

Frequency the DTC runs=Continuously - After the running conditions are met - For greater than 2 s

Conditions for Setting the DTC

P0711Condition 1

Transmission Fluid Temperature & Engine Coolant Temperature=Not within 43ÂºC (77ÂºF) of each other

Condition 2

Transmission Fluid Temperature=The temperature does not change within 10 min & The vehicle speed has reached 40 km/h (29 MPH) at least once during this drive cycle.

Condition 3

Transmission Fluid Temperature=The temperature does not change within a predetermined time.

P0712

Transmission Fluid Temperature=Warmer than 200ÂºC (392ÂºF) - For greater than 60 s

P0713

Transmission Fluid Temperature=Colder than -55ÂºC (-67ÂºF) - For greater than 12 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type B DTC

Autostart/Autostop=Disabled - If equipped
Torque Converter Clutch=Disabled
Transmission Adaptive Values Learn=Disabled

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type B DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Verify the condition does not exist: Incorrect fluid level or condition - Transmission - Refer to Transmission Fluid Level and Condition Check

If a condition exists

Refer to Fluid Leak Diagnosis

Go to next step: If no condition exists

2. Verify the scan tool parameter: Transmission Fluid Temperature=-39 to 199ÂºC (-39 to 390ÂºF)

If not between -39 and 199ÂºC (-39 and 390ÂºF)

Refer to Circuit/System Testing

Go to next step: If between -39 and 199ÂºC (-39 and 390ÂºF)

3. Operate the cold vehicle above 64 km/h (40 MPH) for 10 min.

Verify the scan tool parameter: Transmission Fluid Temperature=Temperature increases greater than 2ÂºC (4ÂºF)

If the temperature does not increase 2ÂºC (4ÂºF) or greater

Refer to Circuit/System Testing

Go to next step: If the temperature increases greater than 2ÂºC (4ÂºF)

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

5. All OK.

Circuit/System Testing

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems - Off

NOTE: Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.

2. Remove the component: K71 Transmission Control Module.

3. Test for infinite resistance between the test points: Low: Reference circuit terminal 19 & Transmission Case.

If less than infinite resistance

Replace the component: Automatic Transmission Wiring Harness

Go to next step: If infinite resistance

4. Test for infinite resistance between the test points: Signal circuit terminal 10 & Transmission Case

If less than infinite resistance

Replace the component: Automatic Transmission Wiring Harness

Go to next step: If infinite resistance

5. Test the resistance between the test points: Low: Reference circuit terminal 19 & Signal circuit terminal 10

Verify the value is within the range listed in the table: Refer to Temperature Versus Resistance (B13 Transmission Fluid Temperature Sensor) Refer to Temperature Versus Resistance (Q27 Pressure Control Solenoid Valve) Refer to Temperature Versus Resistance (Q32 Shift Solenoid Valve 1)

If in the specified range

Replace the component: K71 Transmission Control Module

Go to next step: If not in the specified range

6. Test or replace the component: Automatic Transmission Wiring Harness

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Wiring Harness Wire Replacement - Automatic Transmission Wiring Harness
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0717, P07BF, or P07C0

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0717

Input Speed Sensor Circuit No Signal

DTC P07BF

Input Speed Sensor Circuit Low Voltage

DTC P07C0

Input Speed Sensor Circuit High Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Transmission ISS

Automatic Transmission

Circuit/System Description

Automatic Transmission

The sensor is an input to the control module K71. The input signal is used to determine the rotational speed of the component: Input Shaft

The control module uses this data, along with other data, to adjust or control the following:

Torque Converter Clutch
Transmission Shifting

Conditions for Running the DTC

P07BF, P07C0

Ignition Voltage=10.2 to 15.5 V
K71 Transmission Control Module= Communication Enabled

Frequency the DTC runs=Continuously - After the running conditions are met - For 2 s

Conditions for Setting the DTC

P0717

Transmission ISS=0 RPM & Transmission OSS=Greater than 0 RPM

P07BF

Transmission ISS=Invalid Signal Received - Short to Ground

P07C0

Transmission ISS=Invalid Signal Received - Short to Voltage

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC

Autostart/Autostop=Disabled - If equipped
Fail-Safe Mode=Active
Learning=Disabled
Torque Converter Clutch=Disabled
Transmission OSS=Calculated

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Description and Operation

Refer to Transmission General Description

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Engine - Running.

2. Transmission - Park.

3. Verify the scan tool parameter: Transmission ISS=Engine Speed.

If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

4. Transmission - Reverse.

5. Verify the scan tool parameter: Transmission ISS= 0.

If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

6. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

7. All OK.

Circuit/System Testing

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems - Off

2. Remove the component:K71 Transmission Control Module

NOTE: Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.

3. Test for 4500000 to 5000000 ohms between the test points:Signal circuit terminal 18 & Low: Reference circuit terminal 17

If not between 4500000 and 5000000 ohms

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:B14C Transmission Input Shaft Speed Sensor
Test for less than 2 ohms between the test points:
- Control circuit terminal 2@Component harness & Signal circuit terminal 18@Control module harness
- Low: Reference circuit terminal 1@Component harness & Low: Reference circuit terminal 17@Control module harness
- If 2 ohms or greater - Replace the component:Automatic Transmission Wiring Harness
- If less than 2 ohms - Replace the component:B14C Transmission Input Shaft Speed Sensor

Go to next step: If between 4500000 and 5000000 ohms

4. Test for infinite resistance between the test points:

Signal circuit terminal 18 & Transmission Case
Low: Reference circuit terminal 17 & Transmission Case
If less than infinite resistance

Remove the component: Control Valve Body Cover
Disconnect the electrical connector:B14C Transmission Input Shaft Speed Sensor
Test for infinite resistance between the test points:
- Signal circuit terminal 2@Component harness & Transmission Case
- Low: Reference circuit terminal 1@Component harness & Transmission Case

If less than infinite resistance - Replace the component: Automatic Transmission Wiring Harness.
If less than infinite resistance - Replace the component:B14C Transmission Input Shaft Speed Sensor.
Go to next step: If infinite resistance

5. Replace the component:K71 Transmission Control Module

Component Testing

1. Ignition/Vehicle - Off.

2. Disconnect the electrical connector:B14C Transmission Input Shaft Speed Sensor.

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 4500000 to 5000000 ohms between the test points: Control terminal 2 & Low: Reference terminal 1.

If not between 4500000 and 5000000 ohms

Replace the component:B14C Transmission Input Shaft Speed Sensor

Go to next step: If between 4500000 and 5000000 ohms

4. Test for infinite resistance between the test points:Each terminal of the component & The component's housing.

If less than infinite resistance

Replace the component:B14C Transmission Input Shaft Speed Sensor

Go to next step: If infinite resistance

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Input Speed Sensor Replacement
Refer to Wiring Harness Wire Replacement - Automatic Transmission Wiring Harness
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0722, P077C, or P077D

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0722

Output Speed Sensor Circuit No Signal

DTC P077C

Output Speed Sensor Circuit Low Voltage

DTC P077D

Output Speed Sensor Circuit High Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Transmission OSS

Automatic Transmission

Circuit/System Description

Automatic Transmission

The sensor is an input to the control module K71. The input signal is used to determine the rotational speed of the component:Output Shaft The control module uses this data, along with other data, to adjust or control the following:

Torque Converter Clutch
Transmission Shifting

Conditions for Running the DTC

P0722

DTC P077C, P077D, P07BF, P07C0, P0973, P0974, P0748, P0778, P0798, P0962, P0963, P0967, P0970.
P0971, P2716, P2720, P2721, P2725, P2729, P2730, P2734, P2738, P2739 = Not set
Engine Speed= Greater than 400 RPM
Fail-Safe Mode=Inactive
Ignition Voltage=10.2 to 15.5 V
K71 Transmission Control Module= Communication Enabled
Transmission Range=Drive

Frequency the DTC runs=Continuously - After the running conditions are met - For 2 s

P077C, P077D

Engine Speed= Greater than 400 RPM
Ignition Voltage=10.2 to 15.5 V
K71 Transmission Control Module= Communication Enabled

Frequency the DTC runs=Continuously - After the running conditions are met - For 2 s

Conditions for Setting the DTC

P0722

Transmission OSS=0 RPM & Transmission ISS=Greater than 0 RPM

P077C

Transmission OSS=Invalid Signal Received - Short to Ground

P077D

Transmission OSS=Invalid Signal Received - Short to Voltage

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC

Autostart/Autostop=Disabled - If equipped
Fail-Safe Mode=Active
{ P077C, P077D }Transmission gear allowed=4th Gear - After a stop
{ P0722 }Transmission gear allowed=6th gear
Transmission ISS=Calculated

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Description and Operation

Refer to Transmission General Description

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Engine - Running.

2. Transmission - Park.

CAUTION: Support the lower control arms in the normal horizontal position in order to avoid damage to the drive axles. Do not operate the vehicle in gear with the wheels hanging down at full travel.

3. Raise and support the vehicle.

4. Transmission - Drive.

5. Verify the scan tool parameter:Transmission OSS=The value should change smoothly and gradually as the vehicle speed is increased and decreased.

If the value does not change smoothly and gradually

Refer to Circuit/System Testing

Go to next step: If the value does not change smoothly and gradually

6. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

7. All OK.

Circuit/System Testing

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems - Off.

2. Remove the component:K71 Transmission Control Module.

NOTE: Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.

3. Test for 4500000 to 5000000 ohms between the test points:Signal circuit terminal 11 & Low: Reference circuit terminal 20

If not between 4500000 and 5000000 ohms

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:B14C Transmission Input Shaft Speed Sensor
Test for less than 2 ohms between the test points:
- Control circuit terminal 2@Component harness & Signal circuit terminal 11@Control module harness
- Low: Reference circuit terminal 1@Component harness & Low: Reference circuit terminal 20@Control module harness
- If 2 ohms or greater - Replace the component:Automatic Transmission Wiring Harness
- If less than 2 ohms - Replace the component:B14C Transmission Input Shaft Speed Sensor

Go to next step: If between 4500000 and 5000000 ohms

4. Test for infinite resistance between the test points:

Signal circuit terminal 11 & Transmission Case
Low: Reference circuit terminal 20 & Transmission Case
If less than infinite resistance

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:B14C Transmission Input Shaft Speed Sensor
Test for infinite resistance between the test points:
- Signal circuit terminal 2@Component harness & Transmission Case
- Low: Reference circuit terminal 1@Component harness & Transmission Case
- If less than infinite resistance - Replace the component:Automatic Transmission Wiring Harness
- If less than infinite resistance - Replace the component:B14A Transmission Output Shaft Speed Sensor
- Go to next step: If infinite resistance

Go to next step: If infinite resistance

5. Replace the component:K71 Transmission Control Module

Component Testing

1. Ignition/Vehicle - Off.

2. Disconnect the electrical connector:B14A Transmission Output Shaft Speed Sensor.

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 4500000 to 5000000 ohms between the test points:Control terminal 2 & Low: Reference terminal 1.

If not between 4500000 and 5000000 ohms

Replace the component:B14A Transmission Output Shaft Speed Sensor

Go to next step: If between 4500000 and 5000000 ohms

4. Test for infinite resistance between the test points:Each terminal of the component & The component's housing.

If less than infinite resistance

Replace the component:B14A Transmission Output Shaft Speed Sensor

Go to next step: If infinite resistance

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Counter Drive Gear Removal - B14A Transmission Output Shaft Speed Sensor
Refer to Counter Drive Gear Installation - B14A Transmission Output Shaft Speed Sensor
Refer to Wiring Harness Wire Replacement - Automatic Transmission Wiring Harness
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0729-P0735, P076F, or P07D9

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0729

6th Gear Ratio Incorrect

DTC P0730

Gear Ratio Incorrect

DTC P0731

1st Gear Ratio Incorrect

DTC P0732

2nd Gear Ratio Incorrect

DTC P0733

3rd Gear Ratio Incorrect

DTC P0734

4th Gear Ratio Incorrect

DTC P0735

5th Gear Ratio Incorrect

DTC P076F

7th Gear Ratio Incorrect

DTC P07D9

8th Gear Ratio Incorrect

Circuit/System Description

The control module calculates gear ratio based on information from various transmission sensors and information obtained from other control modules. If the commanded gear ratio does not match the calculated gear ratio, a DTC sets.

Conditions for Running the DTC

DTC P0711, P0712, P0713, P0742, P0717, P07BF, P07C0, P0722, P077C, P077D = Not set
B14A Transmission Output Shaft Speed Sensor=Greater than 59 RPM
K71 Transmission Control Module= Communication Enabled
Ignition Voltage=9 to 32 V
Transmission Fluid Temperature=Warmer than -20ÂºC (-4ÂºF)
Transmission Range= Drive
{P0729Condition 1}Transmission Gear=6th gear
{P0729Condition 2}Transmission Gear=6th gear & Engine Torque=Greater than 59 Nm (44 lb ft)
{P0730Condition 1}Transmission Gear=1st Gear & Engine Torque=Less than 0 Nm (0 lb ft)
{P0730Condition 2}Transmission Gear=1st Gear & Engine Torque=Less than -20 Nm (-15 lb ft) or Greater than 29 Nm (21 lb ft)
{P0730Condition 3}Transmission Gear=1st Gear & Engine Torque=Greater than 59 Nm (44 lb ft) & B14C
Transmission Input Shaft Speed Sensor=Less than 6001 RPM {P0731}Transmission Gear=1st Gear & Engine Torque=Greater than 59 Nm (44 lb ft) & B14C Transmission
Input Shaft Speed Sensor =Less than 6001 RPM
{P0732Condition 1}Transmission Gear=2nd Gear
{P0732Condition 2}Transmission Gear=2nd Gear & Engine Torque=Less than -20 Nm (-15 lb ft) or Greater than 29 Nm (21 lb ft)
{P0733Condition 1}Transmission Gear=3rd Gear
{P0733Condition 2}Transmission Gear=3rd Gear & Engine Torque=Less than -20 Nm (-15 lb ft) or Greater than 29 Nm (21 lb ft)
{P0734Condition 1}Transmission Gear=4th Gear
{P0734Condition 2}Transmission Gear=4th Gear & Engine Torque=Less than -20 Nm (-15 lb ft) or Greater than 29 Nm (21 lb ft)
{P0735Condition 1}Transmission Gear=5th Gear
{P0735Condition 2}Transmission Gear=5th Gear & Engine Torque=Less than -20 Nm (-15 lb ft) or Greater than 29 Nm (21 lb ft)
{P076FCondition 1}Transmission Gear=7th Gear {P076FCondition 2}Transmission Gear=7th Gear & Engine Torque=Less than -20 Nm (-15 lb ft) or Greater than 29 Nm (21 lb ft)
{P07D9Condition 1}Transmission Gear=8th Gear
{P07D9Condition 2}Transmission Gear=8th Gear & Engine Torque=Less than -20 Nm (-15 lb ft) or Greater than 29 Nm (21 lb ft)

Frequency the DTC runs=Continuously - After the running conditions are met - For 2 s

Conditions for Setting the DTC

P0729, P0730, P0732, P0733, P0734, P0735, P076F, P07D9 - Condition 1

The following parameters are not within 20% of each other:Gear Ratio & Gear Command - For 1 s - Malfunction occurred 5 times.

P0729Condition 2

Gear Ratio=Incorrect gear ratio - Within 4% of gear 4, 5, 7, 8 ratio - For greater than 1 s - Malfunction occurred 5 times.

P0730Condition 2

Gear Ratio=Incorrect gear ratio - Within 4% of gear 3, 4 ratio - For greater than 1 s - Malfunction occurred 5 times.

P0730Condition 3

Gear Ratio=Incorrect gear ratio - Within 4% of gear 2, 5 ratio - For greater than 1 s - Malfunction occurred 5 times.

P0731

Gear Ratio=Incorrect gear ratio - Within 4% of gear 2, 4, 5 ratio - For greater than 1 s - Malfunction occurred 5 times.

P0732Condition 2

Gear Ratio=Incorrect gear ratio - Within 4% of gear 3, 4, 5, 8 ratio - For greater than 1 s - Malfunction occurred 5 times.

P0733Condition 2

Gear Ratio=Incorrect gear ratio - Within 4% of gear 2, 4, 5, 7 ratio - For greater than 1 s - Malfunction occurred 5 times.

P0734Condition 2

Gear Ratio=Incorrect gear ratio - Within 4% of gear 2, 3, 5, 6 ratio - For greater than 1 s - Malfunction occurred 5 times.

P0735Condition 2

Gear Ratio=Incorrect gear ratio - Within 4% of gear 2, 3, 4, 6, 7, 8 ratio - For greater than 1 s - Malfunction occurred 5 times.

P076FCondition 2

Gear Ratio=Incorrect gear ratio - Within 4% of gear 3, 5, 6, 8 ratio - For greater than 1 s - Malfunction occurred 5 times.

P07D9Condition 2

Gear Ratio=Incorrect gear ratio - Within 4% of gear 2, 5, 6, 7 ratio - For greater than 1 s - Malfunction occurred 5 times.

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC - Exceptions listed below - Additional actions taken:

DTC P0730=Type C DTC

Autostart/Autostop=Disabled - If equipped
Fail-Safe Mode=Enabled
Learning=Disabled

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

DTC P0730=Type C DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Description and Operation

Refer to Transmission General Description

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Verify there are no DTCs set related to the following system/component:

Q27A Pressure Control Solenoid Valve 1
Q27B Pressure Control Solenoid Valve 2
Q27C Pressure Control Solenoid Valve 3
Q27D Pressure Control Solenoid Valve 4
Q27E Pressure Control Solenoid Valve 5
Q27F Pressure Control Solenoid Valve 6
Q32A Shift Solenoid Valve 1
Q32B Shift Solenoid Valve 2
If other DTCs are set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

Go to next step: If no other DTCs are set

3. Verify the condition does not exist:Incorrect fluid level or condition - Transmission - Refer to Transmission Fluid Level and Condition Check

If a condition exists

Repair or replace as necessary.

Go to next step: If no condition exists

4. Verify the condition does not exist:Incorrect pressure - Transmission - Refer to Line Pressure Check

If a condition exists

Replace the component:T12 Automatic Transmission Assembly

Go to next step: If no condition exists

5. Clear the DTCs.

6. Perform the configuration/reset function: Refer to Learned Values Reset

7. Road test the vehicle. - Refer to Road Test.

8. Verify DTC P0729, P0730, P0731, P0732, P0733, P0734, P0735, P076F, P07D9 is not set.

{Test failed 1 time (s) }If any of the DTCs are set

Replace the component: K71 Transmission Control Module
Refer to:Step 5

{Test failed 2 time (s) }If any of the DTCs are set

Replace the component: Control Valve Body
Refer to:Step 5

{Test failed 3 time (s) }If any of the DTCs are set

Replace the component: T12 Automatic Transmission Assembly
Refer to:Step 5

Go to next step: If none of the DTCs are set

9. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to:Step 1

Go to next step: If the DTC is not set

10. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Transmission Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0741 or P0742

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0741

Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Stuck Off

DTC P0742

Torque Converter Clutch (TCC) System Stuck On

Circuit/System Description

The following inputs are used to determine TCC slip speed:

Crankshaft Position Sensor
Transmission ISS

When the amount of TCC slip is greater than desired, DTC P0741 sets.When the amount of TCC slip is less than desired, DTC P0742 sets.

Conditions for Running the DTC

DTC P0711, P0712, P0713 P0717, P07BF, P07C0, P0722, P077C, P077D, P2761, P2763, P2764 = Not set
{ P0742 }Engine Speed=1000 to 3000 RPM & Engine Torque=Greater than 60 Nm (44 lb ft)
{ P0741 }Engine Speed=Less than 4001 RPM & Engine Torque=Greater than 0 Nm (0 lb ft)
Ignition=9 to 32 V
Transmission Range=Drive
Transmission Fluid Temperature=Greater than 19ÂºC (66ÂºF)

Frequency the DTC runs=Continuously - After the running conditions are met - For 2 s

Conditions for Setting the DTC

P0741

Torque Converter Clutch=Applied & TCC Slip Speed=Greater than 100 RPM - For greater than 18 s

P0742

Torque Converter Clutch=Released & TCC Slip Speed=Less than 30 RPM - For greater than 24 s

Actions Taken When the DTC Sets

DTC P0741=Type B DTC

DTC P0742=Type C DTC

{ P0742 }Autostart/Autostop=Disabled - If equipped
Learning=Disabled
Torque Converter Clutch=Disabled

Conditions for Clearing the DTC

DTC P0741=Type B DTC

DTC P0742=Type C DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics.

Connector End View: Reference

Refer to Component Connector End View Index.

Component View: Reference

Refer to Disassembled Views.

Description and Operation

Refer to Transmission General Description.

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Verify there are no DTCs set related to the following system/component:Q39A Torque Converter Clutch Pressure Control Solenoid Valve

If other DTCs are set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

Go to next step: If no other DTCs are set

3. Verify the condition does not exist:Incorrect fluid level or condition - Transmission - Refer to Transmission Fluid Level and Condition Check

If a condition exists

Repair or replace as necessary.

Go to next step: If no condition exists

4. Clear the DTCs.

5. Perform the configuration/reset function: Refer to Learned Values Reset.

6. Road test the vehicle. - Refer to Road Test.

7. Verify DTC P0741, P0742 is not set.

{Test failed 1 time (s) }If any of the DTCs are set

Replace the component:K71 Transmission Control Module
Refer to:Step 5

{Test failed 2 time (s) }If any of the DTCs are set

Replace the component: Control Valve Body
Refer to:Step 5

{Test failed 3 time (s) }If any of the DTCs are set

Replace the component: T12 Automatic Transmission Assembly
Refer to:Step 5

Go to next step: If none of the DTCs are set

8. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to:Step 1

Go to next step: If the DTC is not set

9. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Torque Converter Replacement
Refer to Transmission Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0748, P0962, or P0963

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0748

Pressure Control Solenoid Valve 1 Control Circuit

DTC P0962

Pressure Control Solenoid Valve 1 Control Circuit Low Voltage

DTC P0963

Pressure Control Solenoid Valve 1 Control Circuit High Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Pressure Control Solenoid Valve 1 Control Circuit High Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 1 Control Circuit Low Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 1 Control Circuit Open Test Status

Automatic Transmission

Circuit/System Description

Automatic Transmission

The solenoid valve controls the flow of transmission fluid to the hydraulic actuator that controls the C1 clutch.

Conditions for Running the DTC

{ P0748 }DTC P0606, P0657, P0962, P0963, P0966, P0967, P0970, P0971, P2720, P2721, P2729, P2730, P2738, P2739 = Not set
{ P0962 }DTC P0606, P0657, P0963, P0967, P0971, P2721, P2730, P2739 = Not set
{ P0963 }DTC P0606, P0657, P0962, P0966, P0970, P2720, P2729, P2738, = Not set
Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

P0748

Control Circuit=Commanded state does not match the actual state

P0962

Control Circuit=Less than 20 mA - For greater than 1 s

P0963

Control Circuit=Greater than 1358 mA - For greater than 1 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC

Fail-Safe Mode=Active
Learning=Disabled
Transmission gear allowed=3rd Gear - After a stop

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics.

Connector End View: Reference

Refer to Component Connector End View Index.

Component View: Reference

Refer to Disassembled Views.

Description and Operation

Refer to Transmission General Description.

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Perform the scan tool control function:Pressure Control Solenoid Valve 1 - Increase & Decrease

Verify the scan tool parameter:

Pressure Control Solenoid Valve 1 High Voltage Test Status=Not Run or OK
Pressure Control Solenoid Valve 1 Control Circuit Low Voltage Test Status=Not Run or OK
Pressure Control Solenoid Valve 1 Control Circuit Open Test Status=Not Run or OK
If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

3. Perform the scan tool control function:Pressure Control Solenoid Valve 1 - Enable & Disable

Verify the component produces a clicking sound:Q27A Pressure Control Solenoid Valve 1

If the component does not produce a sound

Refer to Circuit/System Testing

Go to next step: If the component produces a sound

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

5. All OK.

Circuit/System Testing

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems - Off

NOTE: Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.

2. Remove the component:K71 Transmission Control Module

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 5.0 to 5.6 ohms between the test points:Control circuit terminal 13 & Low: Reference circuit terminal 14

If not between 5.0 and 5.6 ohms

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q27A Pressure Control Solenoid Valve 1
Test for less than 2 ohms between the test points:
- Control circuit terminal 2@Component harness & Control circuit terminal 13@Control module harness
- Low: Reference circuit terminal 1@Component harness & Low: Reference circuit terminal 14@Control module harness
- If 2 ohms or greater - Replace the component:Automatic Transmission Wiring Harness
- If less than 2 ohms - Replace the component:Q27A Pressure Control Solenoid Valve 1

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:

Control circuit terminal 13 & Transmission Case
Low: Reference circuit terminal 14 & Transmission Case
If less than infinite resistance

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q27A Pressure Control Solenoid Valve 1
Test for infinite resistance between the test points:
- Control circuit terminal 2@Component harness & Transmission Case
- Low: Reference circuit terminal 1@Component harness & Transmission Case
- If less than infinite resistance - Replace the component:Automatic Transmission Wiring Harness
- If infinite resistance - Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. Replace the component:K71 Transmission Control Module

Component Testing

1. Ignition/Vehicle - Off.

2. Disconnect the electrical connector:Q27A Pressure Control Solenoid Valve 1.

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 5.0 to 5.6 ohms between the test points:Control terminal 2 & Low: Reference terminal 1

If not between 5.0 and 5.6 ohms

Replace the component:Control Valve Body

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:Each terminal of the component & The component's housing

If less than infinite resistance

Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Wiring Harness Wire Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0776, P07A2, or P2719

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0776

Transmission Control Solenoid Valve 2 Stuck Off

DTC P07A2

Transmission Clutch 1 Performance

DTC P2719

Transmission Control Solenoid Valve 4 Performance

Circuit/System Description

When in Drive, the solenoid valve controls pressure to the C1 clutch regulator valve, or when in Reverse, the solenoid valve controls pressure to the C3 clutch regulator valve. These DTC's indicate a hydraulic /mechanical problem with the valve body or fluid pressure which is controlled by solenoid valves and is part of the control solenoid valve assembly which has no serviceable parts. With a loss of pressurized fluid, an incorrect gear ratio may result causing a Neutral condition or NO drive in all gears.

Conditions for Running the DTC

P0776, P07A2, P2719

DTC P0563, P0601, P0602, P0604, P0711, P0712, P0713, P0717, P07BF, P07C0, P0722, P0741, P0742, P0748, P077C, P077D, P0798, P0962, P0963, P0970, P0971 = Not set
Battery Voltage=9 to 32 V
{ P0776 }Current Gear=1, 2, 3, 4, 5
{ P07A2 }Current Gear=1, 2, 3, 4, 6
{ P2719 }Current Gear=Reverse & Shift Solenoid Valve 1 Command=Off
Engine Speed=Greater than 600 RPM
Garage Shift =No
Ignition=On
Transmission Fluid Temperature=Warmer than -10ÂºC (14ÂºF)
Transmission ISS=Less than 200 RPM
Transmission OSS=Less than 501 RPM
Transmission Torque Command=Off

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

Condition 1

Transmission Fluid Temperature=Warmer than 0ÂºC (32ÂºF)
The difference between the following parameters is less than 150 RPM:Engine Speed & Transmission Input Speed - For greater than 3 s

Condition 2

Transmission Fluid Temperature=-10 to -1ÂºC (14 to 30ÂºF)
The difference between the following parameters is less than 300 RPM:Engine Speed & Transmission Input Speed - For greater than 10 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type C DTC - Exceptions listed below - Additional actions taken:

Engagement of Reverse Gear=Shift Solenoid Valve 1 Command - ON
Learning=Disabled

DTC P0776=DTC A - Additional actions taken:

Torque Converter Clutch Solenoid Control=Disabled
Manual Shift Control=Disabled

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type C DTC
DTC P0776=DTC A

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics.

Connector End View: Reference

Refer to Component Connector End View Index
Refer to Inline Harness Connector End View Index

Component View: Reference

Refer to Disassembled Views.

Description and Operation

Refer to Electronic Component Description
Refer to Transmission General Description

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode.

2. Verify there are no DTCs set related to the following system/component:

Q27A Pressure Control Solenoid Valve 1
Q27B Pressure Control Solenoid Valve 2
Q27D Pressure Control Solenoid Valve 4
If other DTCs are set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

Go to next step: If no other DTCs are set

3. Verify the condition does not exist:Incorrect fluid level or condition - Transmission - Refer to Transmission Fluid Level and Condition Check.

If a condition exists

Repair or replace as necessary.

Go to next step: If no condition exists

4. Verify there are no DTCs set related to the following system/component:K173 Transmission Range Control Module - If equipped

If any DTC is set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

Go to next step: If no DTC is set

5. Clear the DTCs.

6. Perform the configuration/reset function: Refer to Learned Values Reset.

7. Road test the vehicle. - Refer to Road Test.

8. Verify DTC P0776, P07A2, P2719 is not set.

{Test failed 1 time (s) }If any of the DTCs are set

Replace the component: Control Valve Body
Refer to:Step 5

{Test failed 2 time (s) }If any of the DTCs are set

Replace the component: K71 Transmission Control Module
Refer to:Step 5

{Test failed 3 time (s) }If any of the DTCs are set

Replace the component: T12 Automatic Transmission Assembly
Refer to:Step 5

Go to next step: If none of the DTCs are set

9. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to:Step 1

Go to next step: If the DTC is not set

10. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Transmission Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0778, P0966, or P0967

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0778

Pressure Control Solenoid Valve 2 Control Circuit

DTC P0966

Pressure Control Solenoid Valve 2 Control Circuit Low Voltage

DTC P0967

Pressure Control Solenoid Valve 2 Control Circuit High Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Pressure Control Solenoid Valve 2 Control Circuit High Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 2 Control Circuit Low Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 2 Control Circuit Open Test Status

Automatic Transmission

Circuit/System Description

Automatic Transmission

The solenoid valve controls the flow of transmission fluid to the hydraulic actuator that controls the C2 clutch.

Conditions for Running the DTC

{ P0778 }DTC P0606, P0657, P0962, P0963, P0966, P0967, P0970, P0971, P2720, P2721, P2729, P2730, P2738, P2739 = Not set
{ P0966 }DTC P0606, P0657, P0963, P0967, P0971, P2721, P2730, P2739 = Not set
{ P0967 }DTC P0606, P0657, P0962, P0966, P0970, P2720, P2729, P2738, = Not set
Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

P0778

Control Circuit=Commanded state does not match the actual state

P0966

Control Circuit=Less than 20 mA - For greater than 1 s

P0967

Control Circuit=Greater than 1358 mA - For greater than 1 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC

Fail-Safe Mode=Active
Learning=Disabled
Transmission gear allowed=3rd Gear - After a stop

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics.

Connector End View: Reference

Refer to Component Connector End View Index.

Component View: Reference

Refer to Disassembled Views.

Description and Operation

Refer to Transmission General Description.

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Perform the scan tool control function:Pressure Control Solenoid Valve 2 - Enable & Disable

Verify the scan tool parameter:

Pressure Control Solenoid Valve 2 Control Circuit High Voltage Test Status=Not Run or OK
Pressure Control Solenoid Valve 2 Control Circuit Low Voltage Test Status=Not Run or OK
Pressure Control Solenoid Valve 2 Open Circuit Test Status=Not Run or OK
If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

3. Perform the scan tool control function:Pressure Control Solenoid Valve 2 - Increase & Decrease

Verify the component produces a clicking sound:Q27B Pressure Control Solenoid Valve 2

If the component does not produce a sound

Refer to Circuit/System Testing

Go to next step: If the component produces a sound

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

5. All OK.

Circuit/System Testing

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems - Off

NOTE: Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.

2. Remove the component:K71 Transmission Control Module

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 5.0 to 5.6 ohms between the test points:Control circuit terminal 8 & Low: Reference circuit terminal 9

If not between 5.0 and 5.6 ohms

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q27B Pressure Control Solenoid Valve 2
Test for less than 2 ohms between the test points:
- Control circuit terminal 2@Component harness & Control circuit terminal 8@Control module harness
- Low: Reference circuit terminal 1@Component harness & Low: Reference circuit terminal 9@Control module harness
- If 2 ohms or greater - Replace the component:Automatic Transmission Wiring Harness
- If less than 2 ohms - Replace the component:Q27B Pressure Control Solenoid Valve 2

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:

Control circuit terminal 8 & Transmission Case
Low: Reference circuit terminal 9 & Transmission Case
If less than infinite resistance

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q27B Pressure Control Solenoid Valve 2
Test for infinite resistance between the test points:
- Control circuit terminal 2@Component harness & Transmission Case
- Low: Reference circuit terminal 1@Component harness & Transmission Case
- If less than infinite resistance - Replace the component:Automatic Transmission Wiring Harness
- If infinite resistance - Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. Replace the component:K71 Transmission Control Module

Component Testing

1. Ignition/Vehicle - Off

2. Disconnect the electrical connector:Q27B Pressure Control Solenoid Valve 2

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 5.0 to 5.6 ohms between the test points:Control terminal 2 & Low: Reference terminal 1

If not between 5.0 and 5.6 ohms

Replace the component:Control Valve Body

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:Each terminal of the component & The component's housing

If less than infinite resistance

Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Wiring Harness Wire Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0798, P0970, or P0971

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0798

Pressure Control Solenoid Valve 3 Control Circuit

DTC P0970

Pressure Control Solenoid Valve 3 Control Circuit Low Voltage

DTC P0971

Pressure Control Solenoid Valve 3 Control Circuit High Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Pressure Control Solenoid Valve 3 Control Circuit High Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 3 Control Circuit Low Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 3 Control Circuit Open Test Status

Automatic Transmission

Circuit/System Description

For an overview of the component/system, refer to Transmission General Description

Automatic Transmission

The solenoid valve controls the flow of transmission fluid to the hydraulic actuator that controls the C3 clutch.

Conditions for Running the DTC

{ P0798 }DTC P0606, P0657, P0962, P0963, P0966, P0967, P0970, P0971, P2720, P2721, P2729, P2730, P2738, P2739 = Not set
{ P0970 }DTC P0606, P0657, P0963, P0967, P0971, P2721, P2730, P2739 = Not set
{ P0971 }DTC P0606, P0657, P0962, P0966, P0970, P2720, P2729, P2738, = Not set
Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously - After the running conditions are met - For greater than 2 s

Conditions for Setting the DTC

P0798

Control Circuit=Commanded state does not match the actual state - For greater than 1 s

P0970

Control Circuit=Less than 20 mA - For greater than 1 s

P0971

Control Circuit=Greater than 1, 358 mA - For greater than 1 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC

Learning=Disabled
Fail-Safe Mode=Active
Transmission gear allowed=3rd Gear - After a stop

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics.

Connector End View: Reference

Refer to Component Connector End View Index.

Component View: Reference

Refer to Disassembled Views.

Description and Operation

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Perform the scan tool control function:Pressure Control Solenoid Valve 3 - Increase & Decrease

Verify the scan tool parameter:

Pressure Control Solenoid Valve 3 Control Circuit High Voltage Test Status=Not Run or OK
Pressure Control Solenoid Valve 3 Control Circuit Low Voltage Test Status=Not Run or OK
Pressure Control Solenoid Valve 3 Control Circuit Open Test Status=Not Run or OK
If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

3. Perform the scan tool control function:Pressure Control Solenoid Valve 3 - Enable & Disable Verify the component produces a clicking sound:Q27C Pressure Control Solenoid Valve 3

If the component does not produce a sound

Refer to Circuit/System Testing

Go to next step: If the component produces a sound

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

5. All OK.

Circuit/System Testing

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems - Off

NOTE: Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.

2. Remove the component:K71 Transmission Control Module

3. Test for 5.0 to 5.6 ohms between the test points:Control circuit terminal 3 & Low: Reference circuit terminal 4

If not between 5.0 and 5.6 ohms

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q27C Pressure Control Solenoid Valve 3
Test for less than 2 ohms between the test points:
- Control circuit terminal 2@Component harness & Control circuit terminal 3@Control module harness
- Low: Reference circuit terminal 1@Component harness & Low: Reference circuit terminal 4@Control module harness
- If 2 ohms or greater - Replace the component:Automatic Transmission Wiring Harness
- If less than 2 ohms - Replace the component:Q27C Pressure Control Solenoid Valve 3

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:

Control circuit terminal 3 & Transmission Case
Low: Reference circuit terminal 4 & Transmission Case
If less than infinite resistance

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q27C Pressure Control Solenoid Valve 3
Test for infinite resistance between the test points:
- Control circuit terminal 2@Component harness & Transmission Case
- Low: Reference circuit terminal 1@Component harness & Transmission Case
- If less than infinite resistance - Replace the component:Automatic Transmission Wiring Harness
- If infinite resistance - Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. Replace the component:K71 Transmission Control Modul

Component Testing

1. Ignition/Vehicle - Off

2. Disconnect the electrical connector:Q27C Pressure Control Solenoid Valve 3

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 5.0 to 5.6 ohms between the test points:Control terminal 2 & Low: Reference terminal 1

If not between 5.0 and 5.6 ohms

Replace the component:Control Valve Body

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:Each terminal of the component & The component's housing

If less than infinite resistance

Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Wiring Harness Wire Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0815, P0816, or P0826

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0815

Upshift Switch Circuit

DTC P0816

Downshift Switch Circuit

DTC P0826

Up and Down Shift Switch Circuit

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Driver Shift Request

Automatic Transmission

Circuit/System Description

Automatic Transmission

The switch S2 has an internal resistor ladder network. A specific resistance is generated dependent on the position of the switch.

Conditions for Running the DTC

Ignition Voltage=9 to 32 V
K71 Transmission Control Module= Communication Enabled
K9 Body Control Module= Communication Enabled

Frequency the DTC runs=Continuously - After the running conditions are met - For 2 s

Conditions for Setting the DTC

P0815Condition 1

Transmission Range=Park/Neutral/Reverse
Driver Shift Request=Upshift

The above conditions must occur for greater than 2 s.

Condition 2

Transmission Range=Drive
Driver Shift Request=Upshift

The above conditions must occur for greater than 29 s.

P0816Condition 1

Transmission Range=Park/Neutral/Reverse
Driver Shift Request=Downshift

The above conditions must occur for greater than 2 s.

Condition 2

Transmission Range=Drive
Driver Shift Request=Downshift

The above conditions must occur for greater than 29 s.

P0826

Driver Shift Request=Illegal Mode

Actions Taken When the DTC Sets

DTCs P0815, P0816, P0826 are Type C DTCs.

Manual Shift Control=Disabled

Conditions for Clearing the DTC

DTCs P0815, P0816, P0826 are Type C DTCs.

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics.

Connector End View: Reference

Refer to Component Connector End View Index.

Component View: Reference

Refer to Disassembled Views.

Description and Operation

Refer to Transmission General Description.

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition - On / Vehicle - In Service Mode

2. Verify the scan tool parameter:Driver Shift Request=Inactive

If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

3. Operate the component:S2 Transmission Manual Shift Switch

Verify the scan tool parameter:Driver Shift Request=Upshift/Downshift

If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

5. All OK.

Circuit/System Testing

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems - Off.

2. Disconnect the electrical connector:S3 Transmission Shift Lever.

3. Test for less than 10 ohms between the test points:Ground circuit terminal 2@S3 Transmission Shift Lever (harness side) & Ground.

If 10 ohms or greater

Disconnect the ground connection:G305
Test for less than 2 ohms between the test points:Ground circuit terminal 2@S3 Transmission Shift Lever (harness side) & G305
- If 2 ohms or greater - Repair the open/high resistance in the circuit.
- If less than 2 ohms - Repair the open/high resistance in the ground connection.

Go to next step: If less than 10 ohms

4. Ignition - On / Vehicle - In Service Mode.

5. Test for greater than 10 V between the test points:Signal circuit terminal 3@S3 Transmission Shift Lever & Ground.

If 10 V or less

Ignition/Vehicle - Off
Disconnect the electrical connector:K9 Body Control Module
Test for infinite resistance between the test points:Signal circuit terminal 3@S3 Transmission Shift Lever (harness side) & Ground
- If less than infinite resistance - Repair the short to ground on the circuit.
- Go to next step: If infinite resistance
Test for less than 2 ohms between the test points:Signal circuit terminal 3@S3 Transmission Shift Lever (harness side) & The other end of the circuit@K9 Body Control Module (harness side)
- If 2 ohms or greater - Repair the open/high resistance in the circuit.
- If less than 2 ohms - Replace the component:K9 Body Control Module

If greater than 10 V

6. Test or replace the component:S2 Transmission Manual Shift Switch.

Component Testing

1. Ignition/Vehicle - Off.

2. Disconnect the electrical connector:S3 Transmission Shift Lever.

3. Test the resistance between the test points:Signal terminal 3 & Ground terminal 2.

Operate the component:S2 Transmission Manual Shift Switch

Switch - Not Pressed=5300 to 5800 ohms
Switch - Pressed - Upshift=600 to 660 ohms
Switch - Pressed - Downshift=1900 to 2100 ohms
If not the specified values

Replace the component:S3 Transmission Shift Lever

Go to next step: If the specified values

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Transmission Control Lever Knob Replacement - S3 Transmission Shift Lever
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P086F

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P086F

Neutral Position Not Learned

Circuit/System Description

If the learned position is not stored in the control module K71, DTC P086F sets.

Conditions for Running the DTC

DTC P0603 = Not set
Ignition=On

DTC runs continuously when the above conditions are met.

Conditions for Setting the DTC

Neutral Position=Not Learned

Actions Taken When the DTC Sets

DTC P086F is a Type C DTC.
Engine Cranking=Disabled

Conditions for Clearing the DTC

DTC P086F is a Type C DTC.

Reference Information

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode.

2. Perform the scan tool learn/reset function: Refer to Gear Selector -N- Position Learn.

3. Verify the DTC does not set.

If the DTC sets

Replace the component:K71 Transmission Control Module

Go to next step: If the DTC does not set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0973 or P0974

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0973

Shift Solenoid Valve 1 Control Circuit Low Voltage

DTC P0974

Shift Solenoid Valve 1 Control Circuit High Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Shift Solenoid Valve 1

Automatic Transmission

Shift Solenoid Valve 1 Control Circuit High Voltage Test Status

Automatic Transmission

Shift Solenoid Valve 1 Control Circuit Low Voltage Test Status

Automatic Transmission

Shift Solenoid Valve 1 Control Circuit Open Test Status

Automatic Transmission

Circuit/System Description

Automatic Transmission

Depending on the state of the pressure control solenoids, the position of the component Q32A will cause either a gear shift or 1st gear engine braking.

Conditions for Running the DTC

Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously - After the running conditions are met - For 2 s

Conditions for Setting the DTC

Control Circuit=Commanded state does not match the actual state

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC

Fail-Safe Mode=Active
Learning=Disabled
Transmission gear allowed=3rd Gear - After a stop

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics.

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views.

Description and Operation

Refer to Transmission General Description.

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

1. Engine - Running.

2. Perform the scan tool control function:Shift Transmission Gear - Upshift & Downshift.

Verify the scan tool parameter:

Shift Solenoid Valve 1 Control Circuit High Voltage Test Status=Not Run or OK
Shift Solenoid Valve 1 Control Circuit Low Voltage Test Status=Not Run or OK
Shift Solenoid Valve 1 Control Circuit Open Test Status=Not Run or OK
If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

3. Perform the scan tool control function:Shift Solenoid Valve 1 - Enable & Disable

Verify the component produces a clicking sound:Q32A Shift Solenoid Valve 1

If the component does not produce a sound

Refer to Circuit/System Testing

Go to next step: If the component produces a sound

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

5. All OK.

Circuit/System Testing

1. Ignition/Vehicle - Off.

2. Remove the component:K71 Transmission Control Module.

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 11 to 15 ohms between the test points:Control circuit terminal 23 X2 & Transmission Case

If not between 11 and 15 ohms

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q32A Shift Solenoid Valve 1
Test for less than 2 ohms between the test points:Control circuit terminal 1@Component harness & Terminal 23 X2@Control module harness
- If greater than 2 ohms - Replace the component:Automatic Transmission Wiring Harness
- If less than 2 ohms - Replace the component:Control Valve Body

Go to next step: If between 11 and 15 ohms

4. Replace the component:K71 Transmission Control Module

Component Testing

1. Ignition/Vehicle - Off.

2. Disconnect the electrical connector:Q32A Shift Solenoid Valve 1.

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 11 to 15 ohms between the test points:Control terminal 1 & Transmission Case

If not between 11 and 15 ohms

Replace the component:Control Valve Body

Go to next step: If between 11 and 15 ohms

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Wiring Harness Wire Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P0976 or P0977

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P0976

Shift Solenoid Valve 2 Control Circuit Low Voltage

DTC P0977

Shift Solenoid Valve 2 Control Circuit High Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Shift Solenoid Valve 2 Control Circuit High Voltage Test Status

Automatic Transmission

Shift Solenoid Valve 2 Control Circuit Low Voltage Test Status

Automatic Transmission

Shift Solenoid Valve 2 Control Circuit Open Test Status

Automatic Transmission

Circuit/System Description

Automatic Transmission

Depending on the state of the linear solenoids, the position of the Q32B will cause either a gear shift or 1st gear engine braking.

Conditions for Running the DTC

Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously - After the running conditions are met - For 2 s

Conditions for Setting the DTC

P0976

Shift Solenoid Valve 2 Control Circuit=Off & Shift Solenoid Valve 2 Command=On - For greater than 5 s

P0977

Shift Solenoid Valve 2 Control Circuit=On & Shift Solenoid Valve 2 Command=Off - For greater than 5 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type B DTC

Learning=Disabled
Fail-Safe Mode=Active
Transmission gear allowed=3rd Gear - After a stop

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type B DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics.

Connector End View: Reference

Refer to Component Connector End View Index.

Component View: Reference

Refer to Disassembled Views.

Description and Operation

Refer to Transmission General Description.

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

1. Engine - Running

2. Perform the scan tool control function:Pressure Control Solenoid Valve 2 - Increase & Decrease

Verify the scan tool parameter:

Shift Solenoid Valve 2 Control Circuit High Voltage Test Status=Not Run or OK
Shift Solenoid Valve 2 Control Circuit Low Voltage Test Status=Not Run or OK
Shift Solenoid Valve 2 Control Circuit Open Test Status=Not Run or OK
If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

3. Perform the scan tool control function:Pressure Control Solenoid Valve 2 - Increase & Decrease Verify the component produces a clicking sound:Q32B Shift Solenoid Valve 2=On and Off

If the component does not produce a sound

Refer to Circuit/System Testing

Go to next step: If the component produces a sound

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

5. All OK.

Circuit/System Testing

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems - Off.

2. Remove the component:K71 Transmission Control Module.

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 11 to 15 ohms between the test points:Control circuit terminal 28 & Transmission Case

If not between 11 and 15 ohms

Remove the component:Control Valve Body Cover

Disconnect the electrical connector:Q32B Shift Solenoid Valve 2

Test for less than 2 ohms between the test points:Control circuit terminal 28@Control module harness & Control circuit terminal 1@Component harness

If greater than 2 ohms - Replace the component:Automatic Transmission Wiring Harness

If less than 2 ohms - Replace the component:Control Valve Body

Go to next step: If between 11 and 15 ohms

4. Replace the component:K71 Transmission Control Module

Component Testing

1. Ignition/Vehicle - Off

2. Disconnect the electrical connector:Q32B Shift Solenoid Valve 2

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 11 to 15 ohms between the test points:Control terminal 1 & Transmission Case

If not between 11 and 15 ohms

Replace the component:Control Valve Body

Go to next step: If between 11 and 15 ohms

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Wiring Harness Wire Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P170A-P170E

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P170A

Transmission Hydraulic Circuit 2 Max Pressure Not Achieved

DTC P170B

Transmission Hydraulic Circuit 3 Max Pressure Not Achieved

DTC P170C

Transmission Hydraulic Circuit 4 Max Pressure Not Achieved

DTC P170D

Transmission Hydraulic Circuit 5 Max Pressure Not Achieved

DTC P170E

Transmission Hydraulic Circuit 6 Max Pressure Not Achieved

Circuit/System Description

The pressure control solenoid valves control fluid pressure to the C1, 2, 3, 4 and B1 clutches. The respective pressures were not reached when the transmission experienced an abnormal upshift/downshift or a tie-up during shifts.

Conditions for Running the DTC

DTC P0563, P0601, P0602, P0604, P0711, P0712, P0713, P0717, P07BF, P07C0, P0722, P0748, P077C, P077D, P0778, P0798, P0962, P0963, P0966, P0967, P0970, P0971, P2716, P2720, P2721, P2725, P2729, P2730, P2734, P2738, P2739 = Not set
Ignition=On
Battery Voltage=9 to 32 V - For greater than 2 s
Engine Speed=Greater than 400 RPM
Transmission Range= Drive
Transmission Fluid Temperature=Warmer than -20ÂºC (4ÂºF)
Garage Shift =No
Transmission OSS=Greater than 300 RPM
Slip Detected=No
- Accelerator Pedal=Greater than 70%
- Engine Torque =Greater than 70 Nm (52 lb ft)
- Transmission OSS=300 to 3000 RPM
- Transmission OSS=Less than -50 RPM per second

Conditions for Setting the DTC

Condition 1

Clutch C1, C2, C3, C4, B1=Not released

Condition 2

Incorrect gear ratio@Current Gear - More than 5 times.

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC

Fail-Safe Mode=Active

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index
Refer to Inline Harness Connector End View Index

Component View: Reference

Refer to Disassembled Views.

Description and Operation

Refer to Electronic Component Description Refer to Transmission General Description

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Verify there are no DTCs set related to the following system/component:

Q27A Pressure Control Solenoid Valve 1
Q27B Pressure Control Solenoid Valve 2
Q27C Pressure Control Solenoid Valve 3
Q27D Pressure Control Solenoid Valve 4
Q27E Pressure Control Solenoid Valve 5
If other DTCs are set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

Go to next step: If no other DTCs are set

3. Verify the condition does not exist:Incorrect fluid level or condition. Refer to Transmission Fluid Level and Condition Check.

If a condition exists

Repair or replace as necessary.

Go to next step: If no condition exists

4. Verify there are no DTCs set related to the following system/component:K173 Transmission Range Control Module

If any DTC is set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

Go to next step: If no DTC is set

5. Clear the DTCs.

6. Perform the configuration/reset function: Refer to Learned Values Reset.

7. Road test the vehicle. Refer to Road Test.

8. Verify DTC P170A, P170B, P170C, P170D, P170E is not set.

{Test failed 1 time (s) }If any of the DTCs are set

Replace the component: Control Valve Body
Refer to:Step 5

{Test failed 2 time (s) }If any of the DTCs are set

Replace the component: K71 Transmission Control Module
Refer to:Step 5

{Test failed 3 time (s) }If any of the DTCs are set

Replace the component: T12 Automatic Transmission Assembly
Refer to:Step 5

Go to next step: If none of the DTCs are set

9. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

10. Verify the DTC does not set.

If the DTC sets

Refer to:Step 1

Go to next step: If the DTC is not set

11. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Transmission Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P175F

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P175F

Acceleration Sensor Signal Message Counter Incorrect

Circuit/System Description

Automatic Transmission

Inflatable Restraint Sensing and Diagnostic Module communicates with the electronic brake control module and transmission control module via serial data. The electronic brake control module activates the stability control function depending on the multi-axis acceleration sensor input. The inflatable restraint sensing and diagnostic module uses the multi-axis acceleration sensor to determine if the vehicle is in a roll over or near collision incident.

The transmission control module uses the rate of vehicle acceleration to improve vehicle performance and transmission shift feel. The transmission control module sets this DTC when it detects a discrepancy in the structure of the message, causing the signal message integrity to be questioned.

Conditions for Running the DTC

DTC U0121 = Not set
Ignition=On - For greater than 3 s
Serial Data=Enabled

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

Serial Data=Message Counter Incorrect - Between the following control modules:

K71 Transmission Control Module
K17 Electronic Brake Control Module

The above condition (s) must occur 5 times.

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type C DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type C DTC

Reference Information

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

1. Verify there are no DTCs set related to the following system/component:Serial Data

If other DTCs are set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

If no other DTCs are set

Replace the component:K71 Transmission Control Module
Operate the vehicle within the Conditions for Running the DTC.

Verify the DTC does not set.

If the DTC sets - Replace the component:K17 Electronic Brake Control Module

Go to next step: If the DTC is not set

All OK.

Go to next step: If no DTC is set

2. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

For control module replacement, programming, and setup: Refer to Control Module: References

DTC P1761

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P1761

Up and Down Shift Switch Signal Message Counter Incorrect

Circuit/System Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation.

Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages.

Conditions for Running the DTC

K9 Body Control Module= Communication Enabled
K71 Transmission Control Module= Communication Enabled
Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

Serial Data=Message Counter Incorrect - Between the following control modules:

K71 Transmission Control Module
K9 Body Control Module

The above condition (s) must occur 5 times.

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type C DTC
Manual Shift Control=Disabled

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type C DTC

Reference Information

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

1. Verify there are no DTCs set related to the following system/component:Serial Data

If other DTCs are set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

If no other DTCs are set

Replace the component:K71 Transmission Control Module
Operate the vehicle within the Conditions for Running the DTC.
Verify the DTC does not set.
- If the DTC sets - Replace the component:K9 Body Control Module
- Go to next step: If the DTC is not set
All OK.

Go to next step: If no DTC is set

2. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

For control module replacement, programming, and setup: Refer to Control Module: References

DTC P1775

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P1775

Transmission Range Request Signal Message Counter Incorrect

Circuit/System Description

For an overview of the component/system, refer to Electronic Component Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation.

Conditions for Running the DTC

Battery Voltage=9 to 32 V
Ignition Voltage =9 to 32 V
No other DTCs related to the concerned component are set.

Conditions for Setting the DTC

Serial Data=Message Counter Incorrect - Between the following control modules:

K9 Body Control Module
K71 Transmission Control Module

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type B DTC

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type B DTC

Reference Information

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions.

Scan Tool: Reference

Refer to Control Module: References.

Circuit/System Verification

NOTE: DTC P1775 is an informational DTC.

1. Ignition - On / Vehicle - In Service Mode

2. Verify there are no DTCs set related to the following system/component:Serial Data

If a related DTC is set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

Go to next step: If a related DTC is not set

Ignition/Vehicle - Off
Replace the component:K71 Transmission Control Module
Operate the vehicle within the Conditions for Running the DTC.
Verify the DTC does not set.
- If the DTC sets - Replace the component:K9 Body Control Module
- Go to next step: If the DTC is not set
All OK.
- Go to next step: If no DTC is set

3. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification.

For control module replacement, programming, and setup: Refer to Control Module: References.

DTC P2716, P2720, or P2721

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P2716

Pressure Control Solenoid Valve 4 Control Circuit

DTC P2720

Pressure Control Solenoid Valve 4 Control Circuit Low Voltage

DTC P2721

Pressure Control Solenoid Valve 4 Control Circuit High Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Pressure Control Solenoid Valve 4 Control Circuit High Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 4 Control Circuit Low Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 4 Control Circuit Open Test Status

Automatic Transmission

Circuit/System Description

Automatic Transmission

The solenoid valve controls the flow of transmission fluid to the hydraulic actuator that controls the C4 clutch.

Conditions for Running the DTC

{ P2716 }DTC P0606, P0657, P0962, P0963, P0966, P0967, P0970, P0971, P2720, P2721, P2729, P2730, P2738, P2739 = Not set
{ P2720 }DTC P0606, P0657, P0963, P0967, P0971, P2721, P2730, P2739 = Not set
{ P2721 }DTC P0606, P0657, P0962, P0966, P0970, P2720, P2729, P2738, = Not set
Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

P2716

Control Circuit=Commanded state does not match the actual state

P2720

Control Circuit=Less than 20 mA - For greater than 1 s

P2721

Control Circuit=Greater than 1358 mA - For greater than 1 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC

Fail-Safe Mode=Active
Learning=Disabled
Transmission gear allowed=3rd Gear - After a stop

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics.

Connector End View: Reference

Refer to Component Connector End View Index.

Component View: Reference

Refer to Disassembled Views.

Description and Operation

Refer to Transmission General Description.

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Perform the scan tool control function:Pressure Control Solenoid Valve 4 - Increase & Decrease

Verify the scan tool parameter:

Pressure Control Solenoid Valve 4 Control Circuit High Voltage Test Status=Not Run or OK
Pressure Control Solenoid Valve 4 Control Circuit Low Voltage Test Status=Not Run or OK
Pressure Control Solenoid Valve 4 Control Circuit Open Test Status=Not Run or OK
If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

3. Perform the scan tool control function:Pressure Control Solenoid Valve 4 - Increase & Decrease Verify the component produces a clicking sound:Q27D Pressure Control Solenoid Valve 4

If the component does not produce a sound

Refer to Circuit/System Testing

Go to next step: If the component produces a sound

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

5. All OK.

Circuit/System Testing

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems - Off

NOTE: Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.

2. Remove the component:K71 Transmission Control Module

3. Test for 5.0 to 5.6 ohms between the test points:Control circuit terminal 21 & Low: Reference circuit terminal 22

If not between 5.0 and 5.6 ohms

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q27D Pressure Control Solenoid Valve 4
Test for less than 2 ohms between the test points:
- Control circuit terminal 2@Component harness & Control circuit terminal 21@Control module harness
- Low: Reference circuit terminal 1@Component harness & Low: Reference circuit terminal 22@Control module harness
- If 2 ohms or greater - Replace the component:Automatic Transmission Wiring Harness
- If less than 2 ohms - Replace the component:Q27D Pressure Control Solenoid Valve 4

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:

Control circuit terminal 21 & Transmission Case
Low: Reference circuit terminal 22 & Transmission Case
If less than infinite resistance

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q27D Pressure Control Solenoid Valve 4
Test for infinite resistance between the test points:
- Control circuit terminal 2@Component harness & Transmission Case
- Low: Reference circuit terminal 1@Component harness & Transmission Case
- If less than infinite resistance - Replace the component:Automatic Transmission Wiring Harness
- If infinite resistance - Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. Replace the component:K71 Transmission Control Module

Component Testing

1. Ignition/Vehicle - Off

2. Disconnect the electrical connector:Q27D Pressure Control Solenoid Valve 4

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 5.0 to 5.6 ohms between the test points:Control terminal 2 & Low: Reference terminal 1

If not between 5.0 and 5.6 ohms

Replace the component:Control Valve Body

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:Each terminal of the component & The component's housing

If less than infinite resistance

Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Wiring Harness Wire Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P2725, P2729, or P2730

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P2725

Pressure Control Solenoid Valve 5 Control Circuit

DTC P2729

Pressure Control Solenoid Valve 5 Control Circuit Low Voltage

DTC P2730

Pressure Control Solenoid Valve 5 Control Circuit High Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Pressure Control Solenoid Valve 5 Control Circuit High Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 5 Control Circuit Low Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 5 Control Circuit Open Test Status

Automatic Transmission

Circuit/System Description

Automatic Transmission

The solenoid valve controls the flow of transmission fluid to the hydraulic actuator that controls the C5 clutch.

Conditions for Running the DTC

P2725

{ P2725 }DTC P0606, P0657, P0962, P0963, P0966, P0967, P0970, P0971, P2720, P2721, P2729, P2730, P2738, P2739 = Not set
{ P2729 }DTC P0606, P0657, P0963, P0967, P0971, P2721, P2730, P2739 = Not set
{ P2730 }DTC P0606, P0657, P0962, P0966, P0970, P2720, P2729, P2738, = Not set
Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

P2725

Control Circuit=Commanded state does not match the actual state

P2729

Control Circuit=Less than 20 mA - For greater than 1 s

P2730

Control Circuit=Greater than 1358 mA - For greater than 1 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC

Fail-Safe Mode=Active
Learning=Disabled
Transmission gear allowed=3rd Gear - After a stop

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Description and Operation

Refer to Transmission General Description

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Perform the scan tool control function:Pressure Control Solenoid Valve 5 - Increase & Decrease

Verify the scan tool parameter:

Pressure Control Solenoid Valve 5 Control Circuit High Voltage Test Status=Not Run or OK
Pressure Control Solenoid Valve 5 Control Circuit Low Voltage Test Status=Not Run or OK
Pressure Control Solenoid Valve 5 Control Circuit Open Test Status=Not Run or OK
If not the specified state
Refer to Circuit/System Testing
Go to next step: If the specified state

3. Perform the scan tool control function:Pressure Control Solenoid Valve 5 - Enable & Disable

Verify the component produces a clicking sound:Q27E Pressure Control Solenoid Valve 5

If the component does not produce a sound

Refer to Circuit/System Testing

Go to next step: If the component produces a sound

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

5. All OK.

Circuit/System Testing

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems - Off

NOTE: Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.

2. Disconnect the electrical connector:X2@K71 Transmission Control Module

3. Test for 5.0 to 5.6 ohms between the test points:Control circuit terminal 5 & Low: Reference circuit terminal 12@Control module harness

If not between 5.0 and 5.6 ohms

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q27E Pressure Control Solenoid Valve 5
Test for less than 2 ohms between the test points:
- Control circuit terminal 2@Component harness & Control circuit terminal 5@Control module harness
- Low: Reference circuit terminal 1@Component harness & Low: Reference circuit terminal 12@Control module harness
- If 2 ohms or greater - Replace the component:Automatic Transmission Wiring Harness
- If less than 2 ohms - Replace the component:Q27E Pressure Control Solenoid Valve 5

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:

Control circuit terminal 5 & Transmission Case
Low: Reference circuit terminal 12 & Transmission Case
If less than infinite resistance

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q27E Pressure Control Solenoid Valve 5
Test for infinite resistance between the test points:
- Control circuit terminal 2@Component harness & Transmission Case
- Low: Reference circuit terminal 1@Component harness & Transmission Case
- If less than infinite resistance - Replace the component:Automatic Transmission Wiring Harness
- If infinite resistance - Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. Replace the component:K71 Transmission Control Module

Component Testing

1. Ignition/Vehicle - Off

2. Disconnect the electrical connector:Q27E Pressure Control Solenoid Valve 5

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 5.0 to 5.6 ohms between the test points:Control terminal 2 & Low: Reference terminal 1

If not between 5.0 and 5.6 ohms

Replace the component:Control Valve Body

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:Each terminal of the component & The component's housing

If less than infinite resistance

Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Wiring Harness Wire Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P2734, P2738, or P2739

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P2734

Pressure Control Solenoid Valve 6 Control Circuit

DTC P2738

Pressure Control Solenoid Valve 6 Control Circuit Low Voltage

DTC P2739

Pressure Control Solenoid Valve 6 Control Circuit High Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Pressure Control Solenoid Valve 6 Control Circuit High Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 6 Control Circuit Low Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 6 Control Circuit Open Test Status

Automatic Transmission

Circuit/System Description

For an overview of the component/system, refer to Transmission General Description

Automatic Transmission

The solenoid valve controls line fluid pressure to the various pressure regulating valves in the transmission.

Conditions for Running the DTC

{ P2734 }DTC P0606, P0657, P0962, P0963, P0966, P0967, P0970, P0971, P2720, P2721, P2729, P2730, P2738, P2739 = Not set
{ P2738 }DTC P0606, P0657, P0963, P0967, P0971, P2721, P2730, P2739 = Not set
{ P2739 }DTC P0606, P0657, P0962, P0966, P0970, P2720, P2729, P2738, = Not set
Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

P2734

Control Circuit=Commanded state does not match the actual state

P2738

Control Circuit=Less than 20 mA - For greater than 1 s

P2739

Control Circuit=Greater than 1358 mA - For greater than 1 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type A DTC

Fail-Safe Mode=Fail-Safe Mode
Learning=Disabled
Transmission gear allowed=3rd Gear - After a stop

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type A DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode.

2. Perform the scan tool control function:Pressure Control Solenoid Valve 6 - Increase & Decrease.

Verify the scan tool parameter:

Pressure Control Solenoid Valve 6 Control Circuit High Voltage Test Status=Not Run or OK
Pressure Control Solenoid Valve 6 Control Circuit Low Voltage Test Status=Not Run or OK
Pressure Control Solenoid Valve 6 Control Circuit Open Test Status=Not Run or OK
If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

3. Perform the scan tool control function:Pressure Control Solenoid Valve 6 - Increase & Decrease

Verify the component produces a clicking sound:Q23 Line Pressure Control Solenoid Valve

If the component does not produce a sound

Refer to Circuit/System Testing

Go to next step: If the component produces a sound

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

5. All OK.

Circuit/System Testing

1. Ignition/Vehicle & All vehicle systems - Off

NOTE: Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.

2. Remove the component:K71 Transmission Control Module

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 5.0 to 5.6 ohms between the test points:Control circuit terminal 6 & Low: Reference circuit terminal 7

If not between 5.0 and 5.6 ohms

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q23 Line Pressure Control Solenoid Valve
Test for less than 2 ohms between the test points:
Control circuit terminal 2@Component harness & Control circuit terminal 6@Control module harness
- Low: Reference circuit terminal 1@Component harness & Low: Reference circuit terminal 7@Control module harness
- If 2 ohms or greater - Replace the component:Automatic Transmission Wiring Harness
- If less than 2 ohms - Replace the component:Q23 Line Pressure Control Solenoid Valve

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:

Control circuit terminal 6 & Transmission Case
Low: Reference circuit terminal 7 & Transmission Case
If less than infinite resistance

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q23 Line Pressure Control Solenoid Valve
Test for infinite resistance between the test points:
- Control circuit terminal 2@Component harness & Transmission Case
- Low: Reference circuit terminal 1@Component harness & Transmission Case
- If less than infinite resistance - Replace the component:Automatic Transmission Wiring Harness
- If infinite resistance - Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. Replace the component:K71 Transmission Control Module

Component Testing

1. Ignition/Vehicle - Off

2. Disconnect the electrical connector:Q27F Pressure Control Solenoid Valve 6

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 5.0 to 5.6 ohms between the test points:Control terminal 2 & Low: Reference terminal 1

If not between 5.0 and 5.6 ohms

Replace the component:Control Valve Body

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:Each terminal of the component & The component's housing

If less than infinite resistance

Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Wiring Harness Wire Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P2761, P2763, or P2764

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P2761

Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Control Circuit

DTC P2763

Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Control Circuit High Voltage

DTC P2764

Torque Converter Clutch (TCC) Pressure Control Solenoid Valve Control Circuit Low Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

TCC Pressure Control Solenoid Valve Control Circuit High Voltage Test Status

Automatic Transmission

TCC Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status

Automatic Transmission

TCC Pressure Control Solenoid Valve Control Circuit Open Test Status

Automatic Transmission

Circuit/System Description

For an overview of the component/system, refer to Transmission General Description

Automatic Transmission

The solenoid valve controls the flow of transmission fluid to the hydraulic actuator that controls the torque converter clutch engagement.

Conditions for Running the DTC

{ P2761 }DTC P2763, P2764 = Not set
{ P2763 }DTC P2764 = Not set
{ P2764 }DTC P2763 = Not set
Engine Speed= Greater than 400 RPM for greater than 2 s
Fail-Safe Mode=Inactive
Ignition Voltage=9 to 32 V
K71 Transmission Control Module= Communication Enabled
Transmission Range= Drive

Frequency the DTC runs=Continuously - After the running conditions are met

Conditions for Setting the DTC

P2761

Control Circuit=Commanded state does not match the actual state

P2763

Control Circuit=Less than 20 mA - For 1 s

P2764

Control Circuit=Greater than 1358 mA - For 1 s

Actions Taken When the DTC Sets

DTCs listed in the DTC Descriptor Category=Type B DTC

{ P2763 }Autostart/Autostop=Disabled - If equipped
Learning=Disabled
Transmission gear allowed=Gear 2 & Reverse - After a stop

Conditions for Clearing the DTC

DTCs listed in the DTC Descriptor Category=Type B DTC

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Perform the scan tool control function:TCC Solenoid Valve - On & Off

Verify the scan tool parameter:

TCC Pressure Control Solenoid Valve Control Circuit High Voltage Test Status=Not Run or OK
TCC Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status=Not Run or OK
TCC Pressure Control Solenoid Valve Control Circuit Open Test Status=Not Run or OK
If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

3. Perform the scan tool control function:TCC Solenoid Valve - Enable & Disable

Verify the component produces a clicking sound:Q39A Torque Converter Clutch Pressure Control Solenoid Valve

If the component does not produce a sound

Refer to Circuit/System Testing

Go to next step: If the component produces a sound

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

5. All OK.

Circuit/System Testing

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems - Off

NOTE: Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.

2. Remove the component:K71 Transmission Control Module

3. Test for 5.0 to 5.6 ohms between the test points:Control circuit terminal 2 & Low: Reference circuit terminal 1

If not between 5.0 and 5.6 ohms

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q39A Torque Converter Clutch Pressure Control Solenoid Valve
Test for less than 2 ohms between the test points:
- Control circuit terminal 2@Component harness & Control circuit terminal 2@Control module harness
- Low: Reference circuit terminal 1@Component harness & Low: Reference circuit terminal 1@Control module harness
- If 2 ohms or greater - Replace the component:Automatic Transmission Wiring Harness
- If less than 2 ohms - Replace the component:Control Valve Body

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:

Control circuit terminal 2 & Transmission Case
Low: Reference circuit terminal 1 & Transmission Case
If less than infinite resistance

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q39A Torque Converter Clutch Pressure Control Solenoid Valve
Test for infinite resistance between the test points:
- Control circuit terminal 2@Component harness & Transmission Case
- Low: Reference circuit terminal 1@Component harness & Transmission Case
- If less than infinite resistance - Replace the component:Automatic Transmission Wiring Harness
- If infinite resistance - Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. Replace the component:K71 Transmission Control Module

Component Testing

1. Ignition/Vehicle - Off

2. Disconnect the electrical connector:Q39A Torque Converter Clutch Pressure Control Solenoid Valve

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 5.0 to 5.6 ohms between the test points:Control terminal 2 & Low: Reference terminal 1

If not between 5.0 and 5.6 ohms

Replace the component:Control Valve Body

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:Each terminal of the component & The component's housing

If less than infinite resistance

Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Wiring Harness Wire Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P2808

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P2808

Pressure Control Solenoid Valve 7 Stuck Off - Hydraulic/Mechanical Problem

Circuit/System Description

The pressure control solenoid valve 7 is used to apply the C1 clutch during an autostop event. If the control module K71 detects the following conditions, DTC P2808 will set:

Engine speed flare-up
Incorrect gear ratio

Conditions for Running the DTC

K71 Transmission Control Module=Communication Enabled
Transmission Gear=1, 2, 3
Transmission OSS=Less than 200 RPM
Transmission Range=Drive

DTC runs continuously when the above conditions are met for greater than 2 s.

Conditions for Setting the DTC

Gear Ratio=Incorrect - More than 11 times.

Actions Taken When the DTC Sets

DTC P2808 is a Type C DTC.

Conditions for Clearing the DTC

DTC P2808 is a Type C DTC.

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Description and Operation

Refer to Transmission General Description

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode.

2. Verify there are no DTCs set related to the following system/component:

Transmission ISS
Transmission OSS
If other DTCs are set

Refer to: Diagnostic Trouble Code (DTC) List - Vehicle

Go to next step: If no other DTCs are set

3. Verify the condition does not exist:Incorrect fluid level or condition. Refer to Transmission Fluid Level and Condition Check

If a condition exists

Repair or replace as necessary.

Go to next step: If no condition exists

4. Clear the DTCs.

5. Perform the configuration/reset function: Refer to Learned Values Reset.

6. Road test the vehicle. Refer to Road Test.

7. Verify DTC P2808 is not set.

If any of the DTCs are set.

Replace the component: Control Valve Body Assembly

Go to next step: If the DTC is not set

8. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

DTC P2814 or P2815

Diagnostic Instructions

Perform the Diagnostic System Check prior to using this diagnostic procedure: Refer to Diagnostic System Check - Vehicle
Review the description of Strategy Based Diagnosis: Refer to Strategy Based Diagnosis
An overview of each diagnostic category can be found here: Refer to Diagnostic Procedure Instructions

DTC Descriptor

DTC P2814

Pressure Control Solenoid Valve 7 Control Circuit Low Voltage

DTC P2815

Pressure Control Solenoid Valve 7 Control Circuit High Voltage

Diagnostic Fault Information

Automatic Transmission

Typical Scan Tool Data

Pressure Control Solenoid Valve 7 Control Circuit Low Voltage Test Status

Automatic Transmission

Pressure Control Solenoid Valve 7 Control Circuit Open Test Status

Automatic Transmission

Pressure Control Solenoid Valve 7 High Voltage Test Status

Automatic Transmission

Circuit/System Description

Automatic Transmission

The solenoid valve controls the flow of transmission fluid to the hydraulic actuator that controls the C1 clutch. - During an autostart or autostop event

Conditions for Running the DTC

Ignition Voltage=9 to 32 V

DTCs run continuously when the above conditions are met for greater than 2 s.

Conditions for Setting the DTC

Control circuit=Commanded state does not match the actual state

Actions Taken When the DTC Sets

DTCs P2814, P2815 are Type B DTCs.

Autostart/Autostop=Disabled

Conditions for Clearing the DTC

DTCs P2814, P2815 are Type B DTCs.

Reference Information

Schematic: Reference

Refer to Automatic Transmission Controls Wiring Schematics

Connector End View: Reference

Refer to Component Connector End View Index

Component View: Reference

Refer to Disassembled Views

Description and Operation

Refer to Transmission General Description

Electrical Information: Reference

Refer to Circuit Testing
Refer to Connector Repairs
Refer to Testing for Intermittent Conditions and Poor Connections
Refer to Wiring Repairs

DTC Type: Reference

Refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool: Reference

Refer to Control Module: References

Circuit/System Verification

1. Ignition - On / Vehicle - In Service Mode

2. Perform the scan tool control function:Auxiliary Transmission Fluid Pump - Enable & Disable

Verify the scan tool parameter:

Pressure Control Solenoid Valve 7 High Voltage Test Status= OK or Not Run
Pressure Control Solenoid Valve 7 Control Circuit Low Voltage Test Status= OK or Not Run
Pressure Control Solenoid Valve 7 Control Circuit Open Test Status= OK or Not Run
If not the specified state

Refer to Circuit/System Testing

Go to next step: If the specified state

3. Perform the scan tool control function:Auxiliary Transmission Fluid Pump - Enable & Disable

Verify the component produces a clicking sound:Q27G Pressure Control Solenoid Valve 7

If the component does not produce a sound

Refer to Circuit/System Testing

Go to next step: If the component produces a sound

4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

5. Verify the DTC does not set.

If the DTC sets

Refer to Circuit/System Testing

Go to next step: If the DTC is not set

6. All OK.

Circuit/System Testing

NOTE: It may take up to 2 min for all vehicle systems to power down before an accurate ground or low reference circuit continuity test can be performed.

1. Ignition/Vehicle & All vehicle systems - Off

NOTE: Twisting or tilting of the transmission control module electrical connector while disconnecting may result in bent or misaligned electrical terminal pins.

2. Remove the component:K71 Transmission Control Module

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 5.0 to 5.6 ohms between the test points:Control circuit terminal 30 & Low: Reference circuit terminal 29

If not between 5.0 and 5.6 ohms

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q27G Pressure Control Solenoid Valve 7
Test for less than 2 ohms between the test points:
- Control circuit terminal 2@Component harness & Control circuit terminal 30@Control module harness
- Low: Reference circuit terminal 1@Component harness & Low: Reference circuit terminal 29@Control module harness
- If 2 ohms or greater - Replace the component:Automatic Transmission Wiring Harness
- If less than 2 ohms - Replace the component:Control Valve Body

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:

Control circuit terminal 30 & Transmission Case
Low: Reference circuit terminal 29 & Transmission Case
If less than infinite resistance

Remove the component:Control Valve Body Cover
Disconnect the electrical connector:Q27A Pressure Control Solenoid Valve 1
Test for infinite resistance between the test points:
- Control circuit terminal 2@Component harness & Transmission Case
- Low: Reference circuit terminal 1@Component harness & Transmission Case

If less than infinite resistance - Replace the component:Automatic Transmission Wiring Harness
If infinite resistance - Replace the component:Control Valve Body
Go to next step: If infinite resistance

5. Test or replace the component:K71 Transmission Control Module

Component Testing

1. Ignition/Vehicle - Off

2. Disconnect the electrical connector:Q27G Pressure Control Solenoid Valve 7

NOTE: The component's temperature should be 19 to 21ÂºC (66 to 70ÂºF) while testing.

3. Test for 5.0 to 5.6 ohms between the test points:Control terminal 2 & Low: Reference terminal 1

If not between 5.0 and 5.6 ohms

Replace the component:Control Valve Body

Go to next step: If between 5.0 and 5.6 ohms

4. Test for infinite resistance between the test points:Each terminal of the component & The component's housing

If less than infinite resistance

Replace the component:Control Valve Body

Go to next step: If infinite resistance

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Refer to Diagnostic Repair Verification

Refer to Control Valve Body Replacement
Refer to Wiring Harness Wire Replacement
For control module replacement, programming, and setup: Refer to Control Module: References

Symptoms - Automatic Transmission

NOTE: Use the symptom tables only if the following conditions are met:

Refer to Diagnostic Starting Point - Vehicle.
There are no DTCs set.
The control modules can communicate via the serial data link.
Review the system operation in order to familiarize yourself with the system functions: Refer to Transmission General Description

Visual/Physical Inspection

Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions: Refer to Testing for Intermittent Conditions and Poor Connections.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:

Fluid Diagnosis
- Refer to Transmission Fluid Level and Condition Check
- Refer to Fluid Leak Diagnosis
Noise and Vibration Diagnosis
- Refer to Noise and Vibration Analysis
- Refer to Torque Converter Diagnosis
Shift Quality Feel Diagnosis
- Refer to Harsh Garage Shift
- Refer to Harsh Shifts
- Refer to Erratic Shift
- Refer to Slips in Drive or No Drive
Shift Pattern
- Refer to No Upshift or Downshift
- Refer to No Manual Shift
Torque Converter Diagnosis
- Refer to Torque Converter Diagnosis
Symptom Not Found or No Symptom Detected
- Refer to Transmission Fluid Level and Condition Check
- Refer to Road Test
- Refer to Line Pressure Check

TRANSMISSION FLUID LEVEL AND CONDITION CHECK

Level Checking Procedure

1. Start the engine with the A/C turned off.

2. Move the shift lever to all positions from "P" to "D", waiting at least 2 seconds at each position. Repeat this again, and then return it to "P".

3. Raise and support the vehicle: Refer to Lifting and Jacking the Vehicle. The vehicle must be level, with the engine running and the shift lever in the PARK range.

NOTE:

The vehicle must be level with the engine running and the shift lever in the PARK range.
Use only recommended automatic transmission fluid: Refer to Adhesives, Fluids, Lubricants, and Sealers.

4. Wait until the automatic transmission fluid temperature reaches 35 - 45ÂºC (95 - 113ÂºF).

Automatic Transmission

NOTE: Some residual automatic transmission fluid will drain from the level setting hole when the plug is initially removed.

Remove the transmission oil drain plug (1). Allow any fluid to drain.

1. Wait until the fluid first begins to flow as a steady stream and is within the specified temperature range, install the transmission oil drain plug (1).

Automatic Transmission

NOTE: The fluid filler plugs installed at locations 1 & 2 at the vehicle assembly plant are one-time-use. They have an interference fit and do not have O-rings.

Once removed, these plugs must be replaced. The service part (replacement plug) available in the GM Parts Catalog (EPC) comes with an O-ring. Lubricate the seal with AW-1 fluid and install the O-ring prior to installing the plug. At each subsequent service, the service part plug (replacement plug) O-ring seal must be replaced. It is a one-time-use part. It is available separate from the plug in the EPC.

If no fluid comes out and the temperature is within the specified range, add fluid until fluid drips out as a steady stream, and then install the transmission oil drain plug (1). Use only the recommended automatic transmission fluid: Refer to Adhesives, Fluids, Lubricants, and Sealers.

CAUTION: Refer to Fastener Caution.

6. Using a NEW transmission oil drain plug seal (2), install and tighten the transmission oil drain plug (1) to 8 N.m (6 lb ft).

Condition of Automatic Transmission Fluid

NOTE:

Insufficient automatic transmission fluid level will cause the oil pump to draw in air, causing the line pressure to decrease. This causes the clutch to slip, resulting in malfunctions such as a burned clutch.
Excessive/over filled automatic transmission fluid level will cause the gears in the automatic transmission to agitate the automatic transmission fluid, causing bubbling and malfunctions such as deterioration. If the vehicle is driven under this condition, the automatic transmission fluid level can increase and the automatic transmission fluid may blow out of the transmission breather vent hose.
If the automatic transmission fluid contains an excessive amount of metal or friction material, internal wear of the automatic transmission is suspected.

1. Check that the automatic transmission fluid is free of foreign matter.

NOTE: If the automatic transmission fluid is cloudy, water contamination is suspected. Inspect the cooling system.

2. Check that the automatic transmission fluid is not discolored.

Line Pressure Check

Special Tools

EN-21867 Pressure Gauge
EN-21867-50 Transmission Line Pressure Adapter

For equivalent regional tools, refer to Special Tools.

Line Pressure

Automatic Transmission

1. Apply the parking brake and chock the wheels.

2. Install an SLT current measuring machine.

If the machine is not available, installation is not required.

Automatic Transmission

Disconnect the test plug (1) and install EN-21867 Pressure Gauge with EN-21867-50 adapter.

4. Start engine and shift to the "D" position then check oil pressure at idling engine speed.

5. Having completed steps 1 through 4, and with the brake pedal not depressed, line pressure at engine idle should fall within the range specified above.

Automatic Transmission

For the second portion of the line pressure check, firmly depress the brake pedal and perform three stall tests while monitoring the line pressure. Smoothly depress the accelerator pedal to progress from 0 to 100% for 5 seconds. Average the results of the 3 tests. Results should approximate values shown in the chart above.

Drive Range
Oil Pressure [kpa]
Idle
Throttle Opening
Stall
SLT current [mA]

NOTE:

Stall testing causes a sudden rise in the automatic transmission fluid temperature (ATF). Do not continue each test for more than 5 seconds per test. Do not perform more than 3 times without allowing the transmission to cool.
Line Pressure is actively controlled via the transmission control module (TCM). Some deviation from the chart above can be normal. It is important to perform the test 3 times and average the tests.

ROAD TEST

The purpose of the road test is to accurately grasp symptoms of the malfunction and to check completion after the repair is finished.

Be sure to perform the road test under the conditions below:

Only when traffic conditions permit
After engine inspection and adjustment.
With ATF temperature 50-80ÂºC (122-176ÂºF) under ordinary driving conditions
A/C, lights, etc., are turned OFF
Cruise control is OFF

Perform the road test referring to the table below.

Road Test

Automatic Transmission

TORQUE CONVERTER DIAGNOSIS

The torque converter clutch (TCC) is applied by fluid pressure, which is controlled by a pulse width modulated (PWM) solenoid valve. This solenoid valve is located inside of the automatic transmission assembly. The solenoid valve is controlled through a combination of computer controlled switches and sensors.

Torque Converter Stator

The torque converter stator roller clutch can have two different malfunctions.

The stator assembly freewheels in both directions.
The stator assembly remains locked up at all times.

Poor Acceleration at Low Speed

If the stator is freewheeling at all times, the car tends to have poor acceleration from a standstill. At speeds above 50 - 55 km/h (30 - 35 mph), the car may act normally. For poor acceleration, you should first determine that the exhaust system is not blocked, and the transmission is in First gear when starting out.

If the engine freely accelerates to high RPM in NEUTRAL, you can assume that the engine and the exhaust system are normal. Check for poor performance in DRIVE and REVERSE to help determine if the stator is freewheeling at all times.

Poor Acceleration at High Speed

If the stator is locked up at all times, performance is normal when accelerating from a standstill. Engine RPM and car speed are limited or restricted at high speeds. Visual examination of the converter may reveal a blue color from overheating.

If the converter has been removed, you can check the stator roller clutch by inserting a finger into the splined inner race of the roller clutch and trying to turn the race in both directions. You should be able to freely turn the inner race clockwise, but you should have difficulty in moving the inner race counterclockwise or you may be unable to move the race at all.

Noise

NOTE: Do not confuse this noise with pump whine noise, which is usually noticeable in PARK, NEUTRAL and all other gear ranges. Pump whine will vary with line pressure.

You may notice a torque converter whine when the vehicle is stopped and the transmission is in DRIVE or REVERSE. This noise will increase as you increase the engine RPM. The noise will stop when the vehicle is moving or when you apply the torque converter clutch, because both halves of the converter are turning at the same speed.

Perform a stall test to make sure the noise is actually coming from the converter:

1. Place your foot on the brake.

2. Put the gear selector in DRIVE.

3. Depress the accelerator to approximately 1, 200 RPM for no more than 6 seconds.

CAUTION: You may damage the transmission if you depress the accelerator for more than 6 seconds.

A torque converter noise will increase under this load.

Torque Converter Clutch Shudder

The key to diagnosing TCC shudder is to note when it happens and under what conditions.

TCC shudder which is caused by the transmission should only occur during the apply or the release of the converter clutch. Shudder should never occur after the TCC plate is fully applied.

If the shudder occurs while the TCC is applying, the problem can be within the transmission or the torque converter.

Something is causing one of the following conditions to occur:

Something is not allowing the clutch to become fully engaged.
Something is not allowing the clutch to release.
The clutch is releasing and applying at the same time.

One of the following conditions may be causing the problem to occur:

Leaking turbine shaft seals
A restricted release orifice
A distorted clutch or housing surface due to long converter bolts
Defective friction material on the TCC plate

If Shudder Occurs After TCC has Applied

If shudder occurs after the TCC has applied, most of the time there is nothing wrong with the transmission.

As mentioned above, the TCC is not likely to slip after the TCC has been applied. Engine problems may go unnoticed under light throttle and load, but they become noticeable after the TCC apply when going up a hill or accelerating. This is due to the mechanical coupling between the engine and the transmission.

Once TCC is applied, there is no torque converter, fluid coupling, assistance. Engine or driveline vibrations could be unnoticeable before TCC engagement.

Inspect the following components in order to avoid misdiagnosis of TCC shudder. An inspection will also avoid the unnecessary disassembly of a transmission or the unnecessary replacement of a torque converter.

Spark plugs - Inspect for cracks, high resistance or a broken insulator.
Coil - Look for a black discoloration on the bottom of the coil. This indicates arcing while the engine is misfiring.
Fuel injector - The filter may be plugged.
Vacuum leak - The engine will not get a correct amount of fuel. The mixture may run rich or lean depending on where the leak occurs.
EGR valve (Petrol) - The valve may let in too much or too little unburnable exhaust gas and could cause the engine to run rich or lean.
MAP sensor - Like a vacuum leak, the engine will not get the correct amount of fuel for proper engine operation.
Carbon on the intake valves - Carbon restricts the proper flow of air/fuel mixture into the cylinders.
Flat cam - Valves do not open enough to let the proper fuel/air mixture into the cylinders.
Oxygen sensor - This sensor may command the engine too rich or too lean for too long.
Fuel pressure - This may be too low.
Engine mounts - Vibration of the mounts can be multiplied by TCC engagement.
Axle joints - Check for vibration.
TP Sensor (Petrol) - The TCC apply and release depends on the TP Sensor in many engines. If the TP Sensor is out of specification, TCC may remain applied during initial engine loading.
Cylinder balance - Bad piston rings or poorly sealing valves can cause low power in a cylinder.
Fuel contamination - This causes poor engine performance.

Torque Converter Evaluation and Diagnosis

Replace the torque converter if any of the following conditions exist:

External leaks appear in the hub weld area.
The converter hub is scored or damaged.
The converter pilot is broken, damaged, or fits poorly into the crankshaft.
You discover steel particles after flushing the cooler and the cooler lines.
The pump is damaged, or you discover steel particles in the converter.
The vehicle has TCC shudder and/or no TCC apply. Replace the torque converter only after all hydraulic and electrical diagnoses have been made. The converter clutch material may be glazed.
The converter has an imbalance which cannot be corrected.
The converter is contaminated with engine coolant which contains antifreeze.
An internal failure occurs in the stator roller clutch.
You notice excessive end play.
Overheating produces heavy debris in the clutch.
You discover steel particles or clutch lining material in the fluid filter or on the magnet, when no internal parts in the unit are worn or damaged. This condition indicates that lining material came from the converter.

Do not replace the torque converter if you discover any of the following symptoms:

The oil has an odor or the oil is discolored, even though metal or clutch facing particles are not present.
The threads in one or more of the converter bolt holds are damaged. Correct the condition with a new thread inset.
Transmission failure did not display evidence of damaged or worn internal parts, steel particles or clutch plate lining material in the unit and inside the fluid filter.
- If the vehicle has been exposed to high mileage only. An exception may exist where the lining of the torque converter clutch dampener plate has seen excess wear by vehicles operated in heavy and/or constant traffic, such as taxi, delivery, or police use.

NOISE AND VIBRATION ANALYSIS

Idling

Engine Malfunction
Engine to Transmission Mounting
Exhaust Pipe Resonance
Drivetrain
Suspension
ATF Level/Condition

Garage Shift

Engine Malfunction
Engine to Transmission Mounting
Exhaust Pipe Resonance
Drivetrain
Suspension
Tire/Wheel Imbalance
ATF Level/Condition

Driving

Engine Malfunction
Engine to Transmission Mounting
Exhaust Pipe Resonance
Drivetrain
Suspension
Tire/Wheel Imbalance
ATF Level/Condition

Up Shift and/or Down Shift

Engine Malfunction
Engine to Transmission Mounting
Exhaust Pipe Resonance
Drivetrain
Suspension
ATF Level/Condition

ENGINE COOLANT/WATER IN TRANSMISSION

CAUTION: The antifreeze or water will deteriorate the seals, gaskets and the glue that bonds the clutch material to the pressure plate. Both conditions may cause damage to the transmission.

If antifreeze or water has entered the transmission, perform the following:

1. Replace all of the rubber type seals. The coolant will attack the seal material which will cause leakage.

2. Replace the torque converter.

3. Flush the cooler lines after the transmission cooler has been properly repaired or replaced.

Fluid Leak Diagnosis

General Method

1. Verify that the leak is transmission fluid.

2. Thoroughly clean the suspected leak area.

3. Operate the vehicle for 24 km (15 mi), or until normal operating temperatures are reached.

4. Park the vehicle over clean paper or cardboard.

5. Shut OFF the engine.

6. Look for fluid spots on the paper.

7. Make the necessary repairs.

Powder Method

1. Thoroughly clean the suspected leak area with solvent.

2. Apply an aerosol type leak tracing powder to the suspected leak area.

3. Operate the vehicle for 24 km (15 mi), or until normal operating temperatures are reached.

4. Shut OFF the engine.

5. Inspect the suspected leak area.

6. Trace the leak path through the powder in order to find the source of the leak.

7. Make the necessary repairs.

Dye and Black Light Method

A fluid dye and black light kit is available from various tool manufacturers.

1. Follow the manufacturer instructions in order to determine the amount of dye to use.

2. Operate the vehicle for 24 km (15 mi) or until normal operating temperatures are reached.

3. Detect the leak with the black light.

4. Make the necessary repairs.

Find the Cause of the Leak

Pinpoint the leak and trace the leak back to the source. You must determine the cause of the leak in order to repair the leak properly. For example, if you replace a gasket, but the sealing flange is bent, the new gasket will not repair the leak. You must also repair the bent flange. Before you attempt to repair a leak, check for the following conditions, and make repairs as necessary:

Gaskets

Fluid level/pressure is too high.
Plugged vent or drain-back holes.
Improperly tightened fasteners.
Dirty or damaged threads.
Warped flanges or sealing surface.
Scratches, burrs, or other damage to the sealing surface.
Damaged or worn gasket.
Cracking or porosity of the component.
Improper sealant used, where applicable.
Incorrect gasket.

Seals

Fluid level/pressure is too high.
Plugged vent or drain-back holes.
Damaged or worn seal.
Cracks in component.
Manual shaft or output shaft surface is scratched, nicked, or damaged.
Loose or worn bearing causing excess seal wear.

Possible Points of Fluid Leaks

Transmission Valve Body Cover

Incorrectly tightened bolts.
Improperly installed or damaged gasket/seal.
Damaged mounting face.
Incorrect gasket seal.

Transmission Case Leak

Loose or damaged oil cooler lines/seals.
Worn or damaged axle shaft oil seal.
Loose line pressure pipe plug or fluid level pipe plug.

Leak at the Transmission Vent

Overfilled system.
Water or coolant in the fluid. The fluid will appear milky. Check vent hose mounting.
Plugged vent.

Harsh Garage Shift

"N" to "D"

ATF Level/Condition
TCM
Shift Cable Adjustment
Valve Body

"N" to "R"

ATF Level/Condition
TCM
Shift Cable Adjustment
Valve Body

ERRATIC SHIFT

Erratic Shifting

Output Speed Sensor (NOUT)
TCM

SLIPS IN DRIVE OR NO DRIVE

No Move or Slip in "D"

ATF Level/Condition
TCM
Shift Cable Adjustment
Torque Converter
Valve Body
Forward Clutch Pressure Control Solenoid (Gears 1-2-3-4-5) (SL1)

No Move or Slip in "R"

ATF Level/Condition
Shift Solenoid 1 (S1)
Shift Solenoid 2 (S2)
3rd Clutch Pressure Control Solenoid (Gears 3-7-R) (SL3)
TCM
Shift Cable Adjustment
Torque Converter
Valve Body

Slip On Acceleration

ATF Level/Condition
Engine Malfunction
Line Pressure Control Solenoid (SLT)
TCM
Shift Cable Adjustment
Torque Converter
Valve Body

NO UPSHIFT OR DOWNSHIFT

1st to 2nd or 2nd to 1st

ATF Level/Condition
Valve Body
TCM
Engine Malfunction
Battery Voltage Low
Output Speed Sensor (NOUT)
Input Speed Sensor (NIN)
Oil Temperature Sensor (OT)
Shift Solenoid 1 (S1)
3rd Clutch Pressure Control Solenoid (Gears 4-6) (SL4)

2nd to 3rd or 3rd to 2nd

ATF Level/Condition
Valve Body
TCM
Engine Malfunction
Battery Voltage Low
Output Speed Sensor (NOUT)
Input Speed Sensor (NIN)
Oil Temperature Sensor (OT)
Shift Solenoid 1 (S1)
3rd Clutch Pressure Control Solenoid (Gears 3-7-R) (SL3)
3rd Clutch Pressure Control Solenoid (Gears 4-6) (SL4)

3rd to 4th or 4th to 3rd

ATF Level/Condition
Valve Body
TCM
Engine Malfunction
Battery Voltage Low
Output Speed Sensor (NOUT)
Input Speed Sensor (NIN)
Oil Temperature Sensor (OT)
Shift Solenoid 1 (S1)
Direct Clutch Pressure Control Solenoid (Gears 5-6-7-8) (SL2)
3rd Clutch Pressure Control Solenoid (Gears 3-7-R) (SL3)
3rd Clutch Pressure Control Solenoid (Gears 4-6) (SL4)
Shift Solenoid 2 (S2)

4th to 5th or 5th to 4th

ATF Level/Condition
Valve Body
TCM
Engine Malfunction
Battery Voltage Low
Output Speed Sensor (NOUT)
Input Speed Sensor (NIN)
Oil Temperature Sensor (OT)
Forward Clutch Pressure Control Solenoid (SL1)
3rd Clutch Pressure Control Solenoid (Gears 3-7-R) (SL3)
3rd Clutch Pressure Control Solenoid (Gears 4-6) (SL4)

5th to 6th or 6th to 5th

ATF Level/Condition
Valve Body
TCM
Engine Malfunction
Battery Voltage Low
Output Speed Sensor (NOUT)
Input Speed Sensor (NIN)
Oil Temperature Sensor (OT)
Forward Clutch Pressure Control Solenoid (SL1)
3rd Clutch Pressure Control Solenoid (Gears 3-7-R) (SL3)
3rd Clutch Pressure Control Solenoid (Gears 4-6) (SL4)

6th to 7th or 7th to 6th

ATF Level/Condition
Valve Body
TCM
Engine Malfunction
Battery Voltage Low
Output Speed Sensor (NOUT)
Input Speed Sensor (NIN)
Oil Temperature Sensor (OT)
Forward Clutch Pressure Control Solenoid (SL1)
3rd Clutch Pressure Control Solenoid (Gears 3-7-R) (SL3)
3rd Clutch Pressure Control Solenoid (Gears 4-6) (SL4)

7th to 8th or 8th to 7th

ATF Level/Condition
Valve Body
TCM
Engine Malfunction
Battery Voltage Low
Output Speed Sensor (NOUT)
Input Speed Sensor (NIN)
Oil Temperature Sensor (OT)
Forward Clutch Pressure Control Solenoid (SL1)
3rd Clutch Pressure Control Solenoid (Gears 3-7-R) (SL3)
Direct Clutch Pressure Control Solenoid (Gears 5-6-7-8) (SL2)
Forward Band Solenoid (Gears 2-8) (SL5)

No Torque Converter Lock-up ON or OFF

ATF Level/Condition
Valve Body
TCM
Torque Converter Lock-up Control Solenoid (SLU)
Battery Voltage Low
Output Speed Sensor (NOUT)
Input Speed Sensor (NIN)
Oil Temperature Sensor (OT)

No 1st Gear Engine Braking

Fluid Level Low
Valve Body
TCM
Shift Solenoid 1 (S1)
Shift Solenoid 2 (S2)
Battery Voltage Low

No Kickdown

NO MANUAL SHIFT

No Manual Shifting

NO ENGINE START

No Engine Start

Engine Malfunction
Battery Voltage Low
TCM
Shift Cable Adjustment

ENGINE STALLS WHEN SHIFTING FROM NEUTRAL TO DRIVE OR REVERSE

"N" to "D"

Engine Malfunction
Torque Converter Lock-up Control Solenoid (SLU)
TCM
Torque Converter
Valve Body

"N" to "R"

Engine Malfunction
Torque Converter Lock-up Control Solenoid (SLU)
TCM
Torque Converter
Valve Body

Deceleration

Engine Malfunction
Torque Converter Lock-up Control Solenoid (SLU)
TCM
Torque Converter
Valve Body

HARSH SHIFTS

"N" to "D"

Battery Voltage Low
Oil Temperature Sensor (OT)
Forward Clutch Pressure Control Solenoid (Gears 1-2-3-4-5) (SL1)
3rd Clutch Pressure Control Solenoid (Gears 4-6) (SL4)
TCM
ATF Level/Condition
Valve Body

"N" to "R"

Battery Voltage Low
Oil Temperature Sensor (OT)
3rd Clutch Pressure Control Solenoid (Gears 3-7-R) (SL3)
3rd Clutch Pressure Control Solenoid (Gears 4-6) (SL4)
TCM
ATF Level/Condition
Valve Body

Up-Shift

Battery Voltage Low
Oil Temperature Sensor (OT)
Forward Clutch Pressure Control Solenoid (Gears 1-2-3-4-5) (SL1)
Direct Clutch Pressure Control Solenoid (Gears 5-6-7-8) (SL2)
3rd Clutch Pressure Control Solenoid (Gears 3-7-R) (SL3)
3rd Clutch Pressure Control Solenoid (Gears 4-6) (SL4)
TCM
ATF Level/Condition
Valve Body

Down-Shift

Battery Voltage Low
Oil Temperature Sensor (OT)
Line Pressure Control Solenoid (SLT)
Forward Clutch Pressure Control Solenoid (Gears 1-2-3-4-5) (SL1)
Direct Clutch Pressure Control Solenoid (Gears 5-6-7-8) (SL2)
3rd Clutch Pressure Control Solenoid (Gears 3-7-R) (SL3)
3rd Clutch Pressure Control Solenoid (Gears 4-6) (SL4)
TCM
ATF Level/Condition
Valve Body

Kick Down

Battery Voltage Low
Oil Temperature Sensor (OT)
Forward Clutch Pressure Control Solenoid (Gears 1-2-3-4-5) (SL1)
Direct Clutch Pressure Control Solenoid (Gears 5-6-7-8) (SL2)
3rd Clutch Pressure Control Solenoid (Gears 3-7-R) (SL3)
3rd Clutch Pressure Control Solenoid (Gears 4-6) (SL4)
TCM
ATF Level/Condition
Valve Body

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