Engine Control Module: Service and Repair

REMOVAL

USE THE DRB SCAN TOOL TO REPROGRAM THE NEW POWERTRAIN CONTROL MODULE (PCM) WITH THE VEHICLES ORIGINAL IDENTIFICATION NUMBER (VIN) AND THE VEHICLES ORIGINAL MILEAGE. IF THIS STEP IS NOT DONE, A DIAGNOSTIC TROUBLE CODE (DTC) MAY BE SET.

The PCM is located in the engine compartment near the battery.

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

1. Disconnect negative battery cable at battery.
2. Remove cover over electrical connectors. Cover snaps onto PCM.
3. NGC Modules : Carefully unplug the four 38-way connectors from PCM. JTEC Modules : Carefully unplug the three 32way connectors from PCM.
4. Remove three PCM mounting bolts and remove PCM from vehicle.

Fig.9 PCM Remove/Install:

INSTALLATION

1. Install PCM and 3 mounting bolts to vehicle.
2. Tighten bolts. Refer to torque specifications.
3. Check pin connectors in the PCM and its connectors for corrosion or damage. Also, the pin heights in connectors should all be same. Repair as necessary before installing connectors.
4. NGC Modules : Carefully install the four 38-way connectors into PCM. JTEC Modules : Carefully install the three 32way connectors into PCM.
5. Install cover over electrical connectors. Cover snaps onto PCM.
6. Install battery cable.
7. Connect the scan tool to the vehicle.
8. Select Theft Alarm from the scan tool menu.
9. Select SKIM SKREEM from the scan tool menu.
10. Select MISC from the scan tool menu.
11. Select PCM REPLACED from the scan tool menu.
12. Follow the prompts, and enter the PIN number when requested.
13. Verify the PIN is correct and press enter.