Lumina V6-3.1L VIN J (2000)
Powertrain Control Module: Service and Repair
Powertrain Control Module (PCM)
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.
NOTE: 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. Disconnect the negative battery cable.
2. Disconnect the engine coolant reservoir purge hose.
3. Remove the fuse block.
4. Remove the PCM access cover.
5. Disconnect 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. Reconnect the negative battery cable.
If a new PCM is being installed, program the EEPROM. See: Testing and Inspection/Programming and Relearning