Engine Control Module: Service and Repair
MODULE-POWERTRAIN CONTROLUse the 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.
REMOVAL
The PCM (1) 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 32-way connectors from PCM.
4. Remove three PCM mounting bolts (2) and remove PCM from vehicle.
INSTALLATION
1. Install PCM (1) and three mounting bolts (2) 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 32-way connectors into PCM.
5. Install cover over electrical connectors. Cover snaps onto PCM.
6. Install battery cable.
7. Use the scan tool to reprogram new PCM with vehicles original Identification Number (VIN) and original vehicle mileage.