Powertrain Control Module Replacement: Notes
Service of the powertrain control module (PCM) should normally consist of either replacement of the PCM or electrically erasable programmable read only memory (EEPROM) programming. If the diagnostic procedures call for the PCM to be replaced, the PCM should be inspected first to see if the correct part is being used. If the correct part is being used, remove the faulty PCM and install the new service PCM.
To prevent internal PCM damage, the ignition must be OFF when disconnecting or reconnecting power to the PCM. For example, when working with a battery cable, PCM pigtail, PCM fuse, or jumper cables.
Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM module connector gaskets when diagnosing or replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the PCM.
The replacement PCM will not be programmed. DTC P0601 and P0602 indicate the EEPROM is not programmed or has malfunctioned. The following MUST be performed anytime the PCM is replaced:
- Programming of the EEPROM
- The PCM Password Learn procedure - Refer to Powertrain Control Module Programming (On-Board) , Powertrain Control Module Programming (Off-Board) .
- The Crankshaft Position (CKP) System Variation Learn Procedure - Refer to Crankshaft Position System Variation Learn .
- Resetting the engine oil life monitor - Refer to Powertrain Control Module Programming (On-Board) , Powertrain Control Module Programming (Off-Board) .
- The Functional Check