Jeep Cherokee

 Service Manual

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

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

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.

Automatic shutdown (asd) relay

Fuel pump relay

Throttle body

Throttle position sensor (TPS)

Idle air control (IAC) motor

Manifold absolute pressure (map) sensor

Powertrain control module (PCM)

Power steering pressure switch- 2.5L engine

Oxygen sensor

Air cleaner element (filter)

Engine coolant temperature sensor

Intake manifold air temperature sensor

Vehicle speed sensor