Engine Control Module: Service and Repair

PCM Location:

Powertrain Control Module (PCM):

Removing Knock Sensor Module From PCM:

PCM AND KNOCK SENSOR SERVICE
Service of the Powertrain Control Module (PCM) should normally consist of either replacement of the PCM or a EPROM change.

If the diagnostic procedures call for the PCM to be replaced, the PCM should be checked to see if it is the correct part. If it is, remove the Knock Sensor (KS) module from the faulty PCM and install it in the new service PCM. THE SERVICE PCM WILL NOT CONTAIN A KS MODULE. Diagnostic Trouble Code (DTC) P0601 indicates the EEPROM programming has malfunctioned. When DTC P0601 is obtained, reprogram the EEPROM. If a DTC P0325 is set, check the KS module for proper installation. If it is installed correctly and DTC P0325 is still displayed, replace the KS module.

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

CAUTION: The ignition must be "OFF," and disconnect negative battery cable when disconnecting or reconnecting the PCM connector, to prevent internal damage to the PCM.

REMOVE OR DISCONNECT
1. Negative battery cable.
2. R.H. engine splash shield.
3. Horn attaching bolt.
4. Horn electrical connector and horn.
5. PCM retainer attaching bolts (2).
6. Slide PCM and retainer from PCM bracket.
7. PCM electrical connectors.
8. Retainer from PCM.

NOTICE:
Before removing KS Module cover, carefully clean PCM housing with compressed air to remove any debris that may cause damage to PCM circuitry.

9. KS Module cover.

CAUTION:
To prevent possible Electrostatic Discharge damage to the PCM or EPROM, do not touch the connector pins or soldered components on the circuit board and do not remove integrated circuit from carrier.


10. KS Module.

INSTALL OR CONNECT
1. KS module into KS module socket.
2. KS module cover.

Tighten
Cover screws to 2.8 - 3.2 Nm (25 - 28 lb. in.).

3. Slide PCM into PCM retainer.
4. PCM electrical connectors.
5. Slide PCM retainer into PCM bracket slots.
6. PCM retainer attaching bolts (2).

Tighten
(2) PCM retainer attaching bolts to 8 - 12 Nm (6 - 9 lb. ft.)

7. Horn electrical connector and horn.
8. Horn attaching bolt.

Tighten
Horn attaching bolt to 8 - 12 Nm (6 - 9 lb. ft.).

9. R.H. engine splash shield.
10. Negative battery cable.