P0657

DTC P0657

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC P0657
- Actuator High Control Circuit Group Malfunction

Circuit/System Description

This DTC applies to the internal 5 V reference voltage supply within the transmission control module (TCM).

Conditions for Running the DTC

* The ignition is ON.

* The DTCs run continuously once the above condition is met.

Conditions for Setting the DTC

The internal 12 V reference voltage is too low.

Action Taken When the DTC Sets

DTC P0657 is a Type C DTC.

Conditions for Clearing the DTC

DTC P0657 is a Type C DTC.

Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

1. Ignition ON.

2. Verify DTC P0657 is not set.

• If the DTC is set

1. Program the K71 Transmission Control Module. Refer to Control Module References Control Module References

2. Verify DTC P0657 is not set.

• If the DTC is set, replace the K71 Transmission Control Module.

• If the DTC is not set

3. Operate the vehicle within the Conditions for Running the DTC. It may be helpful to operate the vehicle within the conditions identified from the Freeze Frame/Failure Records data.

4. Verify the DTC is not set.

• If the DTC is set
Replace the K71 Transmission Control Module.

• If the DTC is not set

5. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Refer to Control Module References Control Module References for TCM replacement, programming and setup.

* Perform the Transmission Adaptive Functions Transmission Adaptive Functions.