Engine Control Module: Service and Repair

PCM Mounting:

PCM Bracket Removal:

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. The KS module from the old PCM must be transferred to the new PCM.

THE SERVICE PCM EEPROM WILL NOT BE PROGRAMMED. DTC P06O1 and P06O2 indicates the EEPROM is not programmed or has malfunctioned.

Important: When replacing the production PCM with a service PCM (controller), 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.

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

REMOVE OR DISCONNECT
1. Disconnect negative battery cable.
2. Disconnect PCM mounting hardware.

PCM And Connectors:

3. Disconnect PCM electrical connectors.
4. Remove PCM from engine compartment.

PCM With Knock Sensor Module:

5. Remove PCM access cover.

Knock Sensor Module - Removing From PCM:

6. Remove knock sensor module from PCM.

INSTALL OR CONNECT
1. Install knock sensor module and access cover.
2. Connect PCM electrical connectors.
3. Connect PCM mounting hardware.
4. Install PCM in vehicle.
5. If a new PCM is being installed, program the EEPROM.

EEPROM Programming
1. Setup - Ensure that the following conditions have been met:
^ The battery is fully charged.
^ The ignition is ON.
^ The Vehicle Interface Module cable connection at the DLC is secure.
2. Program the PCM using the latest software matching the vehicle. Refer to Techline terminal/equipment users instructions.
3. If the PCM fails to program, proceed as follows:
^ Ensure that all PCM connections are OK.
^ Check the Techline terminal/equipment for the latest software version.
^ Attempt to program the PCM. If the PCM still cannot be programmed properly, replace the PCM. The replacement PCM must be programmed.

Functional Check
1. Perform onboard 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.