Powertrain Control Module (PCM) Replacement: Notes
Powertrain control module (PCM) service should normally consist of either PCM replacement or electrically erasable programmable read only memory (EEPROM) programming. If the diagnostic procedures require PCM replacement, inspect the PCM first to see if the correct part is being used.
IMPORTANT:
In order to prevent internal PCM damage, the ignition must be OFF when you disconnect or reconnect the power to the PCM. For example, disconnect the power when you work with the following components:
- A battery cable
- The PCM pigtail
- The PCM fuse
- Jumper cables
IMPORTANT:
When you diagnose or replace the PCM, remove any debris from the PCM connector surfaces before servicing the PCM module connector gaskets. Ensure that the gaskets are installed correctly. The gaskets prevent contamination intrusion into the PCM.
IMPORTANT:
The replacement PCM MUST be programmed.