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 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. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.

IMPORTANT: It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100 percent. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5 000 km (3,000 mi) from the last engine oil change.

2. Disconnect the negative battery cable.

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.




3. Remove the left closeout/insulator panel.




4. Loosen the PCM connector screws (1).
5. Disconnect the PCM electrical connectors.

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.

6. Depress the PCM retaining tabs.
7. Slide the PCM from the PCM bracket.

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. Slide the PCM into the PCM bracket.




2. Install the PCM electrical connectors.

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. Tighten the PCM connector screws (1).

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten the PCM connector screws to 8 N.m (71 lb ft).

4. Install the left closeout/insulator panel.
5. Connect the negative battery cable.
6. Program the PCM. Refer to Control Module References in Computer/Integrating Systems. Programming and Relearning

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

7. The replacement PCM will NOT allow secondary air injection (AIR) pump operation until a total of 10 miles have accumulated.