P0969

DTC P0969, P0970 or P0971

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.



DTC Descriptors
DTC P0969
- Clutch Pressure Control (PC) Solenoid 3 System Performance

DTC P0970
- Clutch Pressure Control (PC) Solenoid 3 Control Circuit Low Voltage

DTC P0971
- Clutch Pressure Control (PC) Solenoid 3 Control Circuit High Voltage




Circuit/System Description

The clutch pressure control (PC) solenoid 3 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The TCM supplies 12 volts to the clutch PC solenoid 3 on the high side driver 2 circuit. The TCM controls the clutch PC solenoid 3 through the clutch PC solenoid 3 control circuit. The normally high clutch PC solenoid 3 flows fluid to the low and reverse clutch and 4-5-6 clutch assemblies when commanded ON and exhausts fluid when commanded OFF. The clutch PC solenoid 3 regulates the transmission fluid pressure to the low and reverse clutch and 4-5-6 clutch assemblies.


Conditions for Running the DTC

* The engine speed is greater than 500 RPM for 5 seconds.
* The ignition voltage is between 8.6 volts and 19.0 volts.



Conditions for Setting the DTC

P0969

The TCM detects an invalid voltage in the clutch PC 3 solenoid control circuit for 4.4 seconds in a 5.0 second sample.

P0970

The TCM detects low voltage on the clutch PC solenoid 3 control circuit for 300 milliseconds in a 375 millisecond sample.

P0971

The TCM detects high voltage on the clutch PC solenoid 3 control circuit for 300 milliseconds in a 375 millisecond sample.


Action Taken When the DTC Sets


P0969
* DTC P0969 is a Type C DTC.
* The TCM freezes transmission adaptive functions.



P0970
* DTC P0970 is a Type A DTC.
* The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the current gear is 4th, 5th, or 6th gear.
* The TCM inhibits torque converter clutch (TCC).
* The TCM commands maximum line pressure.
* The TCM freezes transmission adaptive functions.



P0971
* DTC P0971 is a Type A DTC.
* The TCM defaults the transmission to 3rd gear if the current gear is 1st, 2nd, or 3rd, or 5th gear if the current gear is 4th, 5th, or 6th gear.
* The TCM inhibits torque converter clutch (TCC).
* The TCM commands maximum line pressure.
* The TCM freezes transmission adaptive functions.



Conditions for Clearing the DTC

* DTC P0969 is a Type C DTC.
* DTCs P0970 and P0971 are Type A DTCs.



Reference Information
Description and Operation

Transmission General Description (Transmission General Description)
DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information


Circuit Verification

1. Ensure the transmission fluid temperature is between 50-80°C (122-176°F).
2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning (Control Solenoid Valve and Transmission Control Module Assembly Cleaning) to dislodge debris and free up the valves.
3. Operate the vehicle in 2nd gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature, then operate the vehicle in Park for 5 seconds.
4. Verify the scan tool Clutch PC 3 Sol. CKT Status parameter displays OK.

• If not the specified value, replace the control solenoid (w/body and TCM) valve assembly.




Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.


Control Solenoid Valve and Transmission Control Module Assembly Cleaning (Control Solenoid Valve and Transmission Control Module Assembly Cleaning)

Important: Perform the Service Fast Learn Adapts (Programming and Relearning) following all transmission related repairs.



Important: Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (Control Solenoid Valve and Transmission Control Module Assembly Inspection)



Control Module References (Programming and Relearning) for control solenoid (w/body and TCM) valve assembly replacement, setup, and programming.