PCM/EEPROM Replacement/Programming

Note: Clear DTCs from the PCM any time either the PCM is reprogramed or the EGR valve is replaced, or anytime the ignition switch is turned on with the EGR valve electrical connector disconnected. This is due to the auto zeroing funtion of the PCM on the EGR pintle.

Notice: 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, 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: To prevent internal PCM damage, the ignition must be OFF when disconnecting or reconnecting power to PCM (for example, battery cable, PCM pigtail, PCM fuse, jumper cables, etc.). 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.

1. Disconnect the negative battery cable.

2. Remove the RH engine splash shield.

3. Disconnect the horn electrical connector.

4. Remove the horn attaching bolt and horn.

5. Remove the PCM retainer attaching bolts (1).






6. Slide the PCM and retainer(1) from PCM bracket (2).





Notice: In order to prevent possible electrostatic discharge damage to the PCM, do not touch the connector pins or soldered components on the circuit board. Do not remove the integrated circuit boards from the carrier.






7. Disconnect the PCM electrical connectors (1).






8. Remove the retainer (1) from the PCM (2).

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 faulty PCM.

Important: Refer to the Latest Techline Information on Re-Programming or Flashing procedures.







1. Slide the PCM (2) into the PCM retainer (1).

Notice: In order to prevent possible electrostatic discharge damage to the PCM, do not touch the connector pins or soldered components on the circuit board. Do not remove the integrated circuit boards from the carrier.








2. Connect the PCM electrical connectors (1).






3. Slide the PCM and retainer (1) into the PCM bracket (2) slots.







4. Install the PCM retainer attaching bolts (1). Tighten the PCM retainer attaching bolts to 8-12 Nm (6-9 lb ft).

5. Connect the horn electrical connector and horn.

6. Install the horn attaching bolt.

7. Install the RH engine splash shield.

8. Connect the negative battery cable.