Service of the powertrain control module (PCM) should normally consist of either replacement of the PCM or 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.

Important: To prevent internal PCM damage, the ignition must be OFF when disconnecting or reconnecting power to the PCM. For example, the battery cable, PCM pigtail, PCM fuse, jumper cables, etc.

Important: Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM module connector gaskets when diagnosing/replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the PCM.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

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

1. Disconnect the negative battery cable.



2. Move the PCM retention bar and retainer away from the PCM.



3. Remove the PCM from the PCM mounting bracket.



4. Remove the PCM electrical connectors.

1. Remove the replacement PCM from the packaging.
2. Check the service number in order to make sure it is the same number as the defective PCM.



3. Install the PCM electrical connectors.

Tighten
Tighten the PCM electrical connectors screws to 8 N·m (71 lb In).




4. Slide the PCM retainer into the PCM bracket slots.



5. Pull the PCM retention bar into position.