Engine Control Module: Service and Repair

The PCM engine control strategy prevents reduced idle speeds until after the engine operates for 320 km (200 miles). If the PCM is replaced after 320 km (200 miles) of usage, update the mileage and vehicle identification number (VIN) in the new PCM. Use the DRB scan tool to change the millage and VIN in the PCM. If this step is not done a diagnostic trouble code (DTC) may be set and SKIM must be done or car will not start if it is a SKIM equipped car, If a SKIM car you must do a secret key transfer also. See below.

REMOVAL
To avoid possible voltage spike damage to PCM, ignition key must be off, and the negative battery cable must be disconnected before unplugging the PCM connectors. Note radio programs.

PCM Location:

1. Remove speed control servo and bracket and reposition out of the way.
2. Reposition wiring harness out of the way.
3. Remove washer bottle filler neck.

TCM Location:

4. Remove Transmission Control Module (TCM) reposition out of the way.
5. Remove PCM
6. Disconnect PCM 2 40-way connector.

INSTALLATION
1. Attach 2 40-way connector to PCM.
2. Install PCM. Tighten bolt to 4 N.m (35 in. lbs.) torque.
3. Install TCM.
4. Install washer bottle filler neck.
5. Reposition wiring harness.
6. Install speed control servo and bracket and tighten fasteners
7. Connect negative battery cable and reprogram radio and clock.
8. Using DRB scan tool, program mileage and vehicle identification number (VIN) into PCM. See below:

Important Note
If the Powertrain Control Module has been changed and the correct VIN and mileage have not been programmed, a DTC will be set in the ABS, Airbag and SKIM modules. In addition, if the vehicle is equipped with a Sentry Key Immobilizer Module (SKIM), Secret Key data must be updated to enable starting.

For ABS and Airbag Systems
1. Enter correct VIN and Mileage in PCM.
2. Erase codes in ABS and Airbag modules.

For SKIM Theft Alarm
1. Connect the DRB to the data link connector.
2. Go to Engine, Misc. and place the SKIM in secured access mode, by using the appropriate PIN code for this vehicle.
3. Select Update the Secret Key data, data will be transferred from the SKIM to the PCM (this is required to allow the vehicle to start with the new PCM).
4. If three attempts are made to enter secured access mode using an incorrect PIN, secured access mode will be locked out for one hour. To exit this lock out mode, leave the ignition key in the Run/Start. position for one hour. Ensure all accessories are turned off. Also monitor the battery state and connect a battery charger if necessary.