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.

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. Disconnect the PCM electrical connectors.

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

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Connect 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.
6. Connect the negative battery cable.
7. Program the PCM. Refer to Powertrain Control Module Programming .