Powertrain Control Module (PCM) Replacement/Programming

PCM And Housing:

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.

Removal Procedure
1. Disconnect the negative battery cable. Refer to Battery Disconnect Caution in Service Precautions.
2. Remove the left strut brace.
3. Remove the air cleaner housing cover and the PCM from the housing assembly.
4. Disconnect the harness connectors from PCM.
5. Remove the PCM from the engine compartment.


Installation Procedure
1. Install the connectors to the PCM.
2. Install the PCM into the air cleaner housing cover.
3. Install the air cleaner housing cover.
4. Connect the negative battery cable.
5. If a new PCM is being Installed, program the EEPROM.
6. The PCM will need to learn the crankshaft variation. Refer to CKP System Variation Learn Procedure.

EEPROM Programming
1. Set-up-Ensure that the following conditions have been met:
^ The battery is fully charged and a battery charger is not connected.
^ The ignition is on.
^ The Techline equipment cable connection at the DLC is secure.
^ If the BCM has been replaced the PCM must relearn the Theft Deterrent password. Refer to BCM Replacement/Programming procedure.
2. Program the PCM using the latest software matching the vehicle. Refer to up-to-date Techline equipment users instructions.
3. If the PCM fails to program, proceed as follows:
^ Ensure that all PCM connections are secure.
^ Check the Techline equipment for the latest software version.
^ Attempt to program the PCM. If the PCM still cannot be programmed properly, replace the PCM. You must also program the replacement PCM.

Functional Check
1. Clear DTCs.
2. Perform Powertrain On Board Diagnostic (OBD) System Check. Refer to Powertrain OBD System Check.
3. Start the engine and run for one minute.
4. Scan for DTC(s) using the scan tool.