Engine Control Module: Service and Repair

PCM Replacement/Programming


NOTICE: In order to prevent possible Electrostatic Discharge damage to the PCM, Do Not touch the connector pins or the soldered components on the circuit board.

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.

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

REMOVAL PROCEDURE

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.

1. Remove the negative battery cable.
2. Remove the engine coolant reservoir purge hose.
3. Remove the fuse block.
4. Remove the PCM access cover.
5. Remove the connectors from the PCM.
6. Remove the PCM from engine compartment.

INSTALLATION PROCEDURE
1. Install the PCM in the engine compartment.
2. Install the connectors to the PCM.
3. Install the PCM access cover.
4. Install the fuse block.
5. Install the engine coolant reservoir purge hose.
6. Install the negative battery cable.

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