Engine Control Module: Service and Repair

PCM Replacement/Programming


NOTE:
^ In order to prevent internal damage to the PCM, the ignition must be OFF when disconnecting or reconnecting the PCM connector.

Service of the PCM should normally consist of either replacement of the PCM, EEPROM re-programming. If the diagnostic procedures call for the PCM to be replaced, the PCM should be checked first to see if it is the correct part. DTC P0601 indicates the EEPROM programming has malfunctioned. When DTC P0601 is obtained, re-program the EEPROM.

Service of the PCM should normally consist of either replacement of the PCM or EEPROM programming. If the diagnostic procedures call for the PCM to be replaced, PCM should be checked first to see if it is the correct part. If it is, remove the faulty PCM and install the new service PCM.

^ Turn the ignition OFF when installing or removing the PCM connectors and disconnecting or reconnecting the power to the PCM (battery cable, PCM pigtail, PCM fuse, jumper cables, etc.) in order to prevent internal PCM damage.

THE SERVICE PCM EEPROM WILL NOT BE PROGRAMMED. DTC P0602 indicates the EEPROM is not programmed or has malfunctioned.

REMOVAL PROCEDURE
1. Negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
2. Engine coolant reservoir purge hose.
3. Remove fuse block.
4. PCM access cover.
5. Connectors from the PCM.
6. PCM from engine compartment.

INSTALLATION PROCEDURE
1. PCM in the engine compartment.
2. Connectors to the PCM.
3. PCM access cover.
4. Install the fuse block.
5. Engine coolant reservoir purge hose.
6. Negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.

If a new PCM is being installed, program the EEPROM. Testing and Inspection