Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC P0657: Solenoid Control High Circuit Group 1Circuit/System Description
The PCM performs continuous self checks of all internal circuits. The PCM provides ignition positive voltage to the throttle actuator control (TAC) motor on circuit 1. DTC P0657 sets when the powertrain control module (PCM) has determined that the control module has an internal fault in the ignition voltage supply circuit 1.
Conditions for Running the DTC
| • | The ignition is ON. |
| • | DTC P0657 runs continuously once the above condition is met. |
Conditions for Setting the DTC
DTC P0657 sets when the internal voltage of the TAC motor ignition supply circuit is incorrect.
Action Taken When the DTC Sets
DTC P0657 is a type A DTC.
Conditions for Clearing the DTC
DTC P0657 is a type A DTC.
Diagnostic Aids
Check the PCM for water contamination. Water entering the PCM can cause damage and corrosion to the circuit boards and to internal components. Repair the source of the water entry before the installation of a replacement PCM.
A DTC P0657 can set if an incorrect PCM is installed in the vehicle. Install the correct PCM according to the vehicle and/or the engine type and equipment options.
Reference Information
Schematic Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
Ignition ON, observe the DTC information with a scan tool. Verify DTC P0657 does not set this ignition cycle.
| ⇒ | If DTC P0657 is set, replace the PCM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control module replacement, setup, and programming
