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.

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

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 switch to prevent internal PCM damage when disconnecting or reconnecting power to the PCM. The following are examples of when the ignition switch should be OFF:
^ Battery cables
^ PCM electrical connectors
^ PCM fuses
^ Jumper cables

The ignition switch 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.

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.




1. Disconnect the negative battery cable.
2. Remove the LH sound insulator.
3. Loosen the PCM electrical 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 electrical connectors.




5. Open the PCM bracket latch.




6. Slide the PCM from the PCM bracket.

INSTALLATION PROCEDURE
Remove the new PCM from its packaging and check the service number to make sure it is the same number or updated number as the malfunctioning PCM.




1. Slide the PCM into the PCM bracket until retainer locks 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 connector screws (1).

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

5. Install the sound insulator.
6. Connect the negative battery cable.
7. Reprogram the PCM, perform the CKP System Variation Learn Procedure and perform the Password Learn procedure. Testing and Inspection