Notice: In order to prevent possible Electrostatic Discharge damage to the PCM, Do Not touch the connector pins or the soldered components on the circuit board.

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.

Notice: 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.

Important: When replacing the production PCM with a service PCM, it is important to transfer the broadcast code and production PCM number to the service PCM label. Do not record on PCM cover. This will allow positive identification of PCM parts throughout the service life of the vehicle.

THE SERVICE PCM EEPROM WILL NOT BE PROGRAMMED. DTC P0602 indicates the EEPROM is not programmed or has malfunctioned.

1. Negative battery cable.
2. Engine coolant reservoir.
3. PCM mounting hardware
4. Connectors from PCM.
5. PCM from engine compartment.
6. PCM access cover.

Knock Sensor (KS) module. Refer to Knock Sensor Module Replacement .

1. If a new PCM is being installed, install the KS module from the original PCM. Refer to Knock Sensor Module Replacement .
2. Access cover on PCM.
3. Connectors to PCM.
4. PCM to mounting bracket underhood
5. Engine Coolant reservoir.
6. Negative battery cable.

If a new PCM is being installed, program the EEPROM.

1. Set-up - Ensure that the following conditions have been met:

•	The ignition is ON.

•	The Vehicle Interface Module (VIM) cable connection at the Data Link Connector (DLC) is secure.

2. If the PCM fails to program, check the Techline equipment for the latest software version.
3. Attempt to program the PCM. If the PCM still cannot be programmed properly, replace the PCM. The replacement PCM must be programmed.

1. Perform On-Board Diagnostic System Check.
2. Start engine and run for one minute.
3. Scan for DTCs using the scan tool.
4. If DTC P0325 sets, the KS module is not fully seated, is missing, or is faulty.