Diagnostic Routine L

Diagnostic Routine L

Diagnostic Overview

P0657

Refer to Wiring Diagram Set 29 for schematic and connector information Electrical Diagrams.

Normal Operation and Fault Conditions

Transmission Solenoid Power Control relay controls vehicle power to all solenoids.

DTC Fault Trigger Conditions






Pinpoint Test

NOTE: If the scan tool is unable to communicate with the PCM (Powertrain Control Module) or access the transmission PIDs (Parameter Identifications), REFER to Computers and Control Systems Information.

1. Read and record all DTCs (Diagnostic Trouble Codes)

1. Install the scan tool and record all DTCs (Diagnostic Trouble Codes).

Was DTC (Diagnostic Trouble Code) P0657 set?






2. Check the transaxle solenoid power control circuit.

1. Ignition OFF.

2. Disconnect the transaxle vehicle harness C168.

3. Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.

4. Ignition ON.

5. Measure the voltage on circuit CET25 (BU/GN) from the transaxle vehicle harness C168-15 to ground.





Is the voltage greater than 9.8 volts?






3. Check the transaxle solenoid power control circuit for an open

1. Ignition OFF.

2. Disconnect the PCM (Powertrain Control Module) C175T.

3. Inspect the connector for damaged or pushed out terminals, corrosion, loose wires and missing or damaged seals.

4. Measure the resistance of circuit CET25 (BU/GN) from the transaxle vehicle harness C168-15 to the PCM (Powertrain Control Module) C175T-50.





Is the resistance less than 5 ohms?






4. Check the transaxle solenoid power control circuit for a short to ground

1. Measure the resistance of circuit CET25 (BU/GN) from the transaxle vehicle harness C168-15 to ground.





Is the resistance greater than 10,000 ohms?