Powertrain Control Module (PCM) Replacement

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

Service of the PCM should normally consist of either replacement of the PCM or EEPROM re-programming.

If the diagnostic procedures call for the PCM to be replaced, the PCM should be checked first to see if it is the correct part. DTC P0601 indicates the EEPROM programming has malfunctioned. When DTC P0601 is obtained, re-program the EEPROM.

The ignition should be OFF for at least 10 seconds before disconnecting power to the PCM so the IAC valve has time to move to the engine OFF position.

Removal Procedure

IMPORTANT: Turn OFF the ignition to prevent internal PCM damage when the following are being performed:
^ The battery cables are removed and connected.
^ The PCM connectors are removed and connected
^ The PCM fuses are replaced
^ If jumper cables are used to start the vehicle

The ignition should be OFF for at least 10 seconds before disconnecting the power to the PCM so the IAC valve has time to move to the correct position.

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.




1. Disconnect the negative battery cable.
2. Remove the left sound insulator.
3. Loosen the PCM connectors screws (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.




4. Disconnect the PCM connectors.




5. Open the PCM bracket latch.




6. Slide the PCM from the PCM bracket.

Installation Procedure
Remove the new PCM from the packaging and verify the service number is the same number as the malfunctioning PCM or an updated number.




1. Slide the PCM into the PCM bracket until retainer locks the PCM into position.




2. Close the PCM bracket latch.

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. Install the PCM electrical connectors.

NOTE: Refer to Fastener Notice in Service Precautions.




4. Tighten the PCM electrical connector screws (1).

Tighten
Tighten the screws (1) to 8 N.m (71 lb in).

5. Install the left sound insulator.
6. Connect the negative battery cable.
7. Reprogram the PCM and perform the crankshaft position (CKP) system variation learn procedure. Programming and Relearning