Engine Control Module: Service and Repair

Description:

NOTE: Service of the Powertrain Control Module (PCM) consists of complete replacement of the PCM. There are no serviceable parts, such as Programmable Read Only Memory (PROM) or Erasable Programmable Read Only Memory (EPROM) to replace inside the PCM. If the PCM is determined to be faulty, it is to be replaced as a complete assembly.

IMPORTANT: Check the resistance value of all PCM relays, solenoids and other output controls before replacing or substituting the Powertrain Control Module. Check all sensor wiring and PCM output control circuits for a short to ground before replacing or substituting the PCM. Damage to the replacement or substitute PCM can occur if proper repairs or component replacements are not performed prior to the installation of a replacement or substitute PCM.


IMPORTANT: When replacing the production PCM with a service PCM, it is important to transfer the broadcast code and production PCM number to the service PCM label. Please do not record on the PCM cover. This will allow positive identification of the PCM parts throughout the service life of the vehicle.

Removal Procedure
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 two side catches and pull the glove box down.
4. Remove the three bolts and PCM bracket from behind glove box.
5. Disconnect the three PCM electrical connectors.
6. Remove the PCM from the passenger compartment.

Installation Procedure
1. Connect the three PCM electrical connectors.
2. Install the PCM bracket to mounting position behind the glove box.
3. Secure the PCM bracket with the three bolts. Tighten the PCM bracket bolts to 6 Nm (4 lb. ft.).
4. Push the glove box up in order to reset the two side catches.
5. Connect the negative (-) battery cable. Tighten the negative (-) battery cable-to-negative (-) battery terminal retainer to 5.5 Nm (4 lb. ft.).