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Jeep Cherokee
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Fuel system » Fuel injection system » Removal and installation
Powertrain control module (PCM)

The PCM is located in the engine compartment next to the air cleaner assembly (Fig. 30).

Fig. 30 PCM Location
Fig. 30 PCM Location

1 - (3) 32-WAY CONNECTORS
2 - PCM

REMOVAL

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) Carefully unplug the three 32-way connectors (Fig. 31) from PCM.

(4) Remove three PCM mounting bolts and remove PCM from vehicle.

INSTALLATION

(1) Install PCM and mounting bolts to vehicle.

(2) Tighten bolts to 4 N·m (35 in. lbs.).

(3) Check pin connectors in the PCM and the three 32-way connectors for corrosion or damage. Also, the pin heights in connectors should all be same. Repair as necessary before installing connectors.

Fig. 31 PCM Mounting
Fig. 31 PCM Mounting

1 - PCM
2 - L. F. FENDER
3 - PCM MOUNTING BOLTS (3)

(4) Install three 32-way connectors.

(5) Install cover over electrical connectors. Cover snaps onto PCM.

(6) Install battery cable.

(7) Use the DRB scan tool to reprogram new PCM with vehicles original Identification Number (VIN) and original vehicle mileage.

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    Jeep Cherokee Service Manual / Fuel system / Fuel injection system / Removal and installation / Powertrain control module (PCM)

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