Engine Control Module: Service and Repair

POWERTRAIN CONTROL MODULE (PCM) REPLACEMENT

REMOVAL PROCEDURE

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

Service should normally consist of either replacement of the powertrain control module (PCM) or the electrically erasable programmable read only memory (EEPROM) re-programming.

If the diagnostic procedures call for the PCM to be replaced, the PCM should be inspected first in order to verify the PCM is the correct part. DTC P0602 indicates the EEPROM programming has malfunctioned. When DTC P0602 is set, re-program the EEPROM.
1. Disconnect the negative battery cable.




2. Push down the locking tab and pull up on the release lever and disconnect the PCM harness connectors (1).

NOTE: Do not touch the PCM connector pins or soldered components on the circuit board in order to prevent possible electrostatic discharge (ESD) damage. Do not remove the integrated circuit boards from the carrier.

3. Press the PCM retaining tab.
4. Lift the PCM (2) from the PCM bracket (3).

INSTALLATION PROCEDURE
Remove the new PCM from the packaging and inspect the service number to verify the number is the same number, or an updated number, as the faulty PCM.




1. Push the PCM (2) into the PCM bracket (3). The retaining tab will lock in place.
2. Install the PCM harness connectors (1) and lock down the release levers.

NOTE: Do not touch the PCM connector pins or soldered components on the circuit board in order to prevent possible electrostatic discharge (ESD) damage. Do not remove the integrated circuit boards from the carrier.

3. Connect the negative battery cable.
4. Program the PCM. Programming and Relearning

IMPORTANT: The replacement PCM must be reprogrammed and the crankshaft position system variation learn procedure must be performed. Programming and Relearning