Engine Control Module: Service and Repair

REMOVAL PROCEDURE

NOTE:
^ Check the resistance values of all PCM relays, solenoids, and other output controls before replacing or substituting the Powertrain Control Module (PCM). Check all the sensor wiring and the PCM output control circuits for a short to ground before replacing or substituting the PCM. Perform all circuit repairs or malfunctioning component part replacements before installing a replacement or substitute PCM. This will prevent damage to the replacement or substitute PCM.
^ In order to prevent possible Electrostatic Discharge damage to the PCM, Do Not touch the connector pins or the soldered components on the circuit board.

IMPORTANT:
^ Service of the PCM consists of the replacement of the PCM. The PCM is not serviceable. The PCM does not contain a Programmable Read-only Memory (PROM) to replace. The PCM does not contain an Erasable Programmable Read-only Memory (EPROM) to calibrate. Replace the PCM as a complete assembly if the PCM is faulty.
^ If you replace the PCM with a service PCM, transfer the broadcast code and the production PCM number to the service PCM label. This will allow for positive identification of the PCM throughout the service life of the vehicle.

CAUTION: Refer to Battery Disconnect Caution in Service Precautions.




1. Disconnect the negative battery cable.
2. Open the glove box.
3. Apply pressure to the sides of the glove box in order to release the 2 side retainers, and pull the glove box down.




4. Remove the 3 bolts and the PCM bracket from behind the glove box.
5. Disconnect the 3 PCM electrical connectors.
6. Remove the PCM from the passenger compartment.

INSTALLATION PROCEDURE




1. Connect the 3 PCM electrical connectors.
2. Install the PCM bracket to the mounting position behind the glove box.

NOTE: Refer to Fastener Notice in Service Precautions.

3. Secure the PCM bracket with the 3 bolts.

Tighten
Tighten the bolts to 6 N.m (4 lb ft).




4. Push up on the glove box in order to reset the retainers.
5. Connect the negative battery cable.

Tighten
Tighten the battery cable retainer to 5.5 N.m (49 lb in).