For 1990-2009 cars

Service of the PCM should normally consist of either replacement of the PCM or EEPROM programming. If the diagnostic procedures call for PCM Replacement, check the PCM first to see if it is the correct part. If the PCM is faulty, remove it and install the new service PCM.

The new service PCM will not be programmed. You must program the new PCM. DTC P0602 indicates the EEPROM is not programmed or has malfunctioned.

Notice: In order to prevent possible electrostatic discharge damage to the PCM, do not touch the connector pins or soldered components on the circuit board.

Notice: Turn the ignition OFF when installing or removing the PCM connectors and disconnecting or reconnecting the power to the PCM (battery cable, PCM pigtail, PCM fuse, jumper cables, etc.) in order to prevent internal PCM damage.

Important: 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. Do not record on PCM cover. This will allow positive identification of PCM parts throughout the service life of the vehicle.

### Removal Procedure

Important: It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100%. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5000 km (3,000 mi) from the last engine oil change.

1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

2. Disconnect the negative battery cable. Refer to Battery Cable .

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

3. Remove the screws from the right hand sound insulator. Refer to Instrument Panel Insulator Panel Replacement - Right Side .
4. Disconnect the courtesy lamp from the right sound insulator.
5. Remove the right hand sound insulator.
6. Remove the PCM (2) from the mounting bracket (3).
7. Remove the harness connectors (1) from PCM.
8. Remove the PCM from instrument panel.

### Installation Procedure

1. Connect the connectors (1) to PCM (2).

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Tighten
Tighten the bolts to 8 N·m (71 lb in).

2. Install the PCM (2) up into the vehicle mounting bracket (3). Ensure the PCM is fully engaged firmly to the mounting bracket.
3. Connect the negative battery cable. Refer to Battery Cable .
4. If a replacement PCM is being installed, the replacement PCM must be reprogrammed (flashed) using the latest Techline programming procedures.
5. Perform the crankshaft position system variation learn procedure. Refer to Crankshaft Position System Variation Learn .

### PCM Programming

1. Set-up - Ensure that the following conditions have been met:

• | The battery is fully charged.

• | The ignition is ON.

• | The Techline Equipment connection at the DLC is secure.

2. Program the PCM using the latest software matching the vehicle. Refer to up-to-date Techline equipment user's instructions.
3. If the PCM fails to program, proceed as follows:

• | Ensure that all PCM connections are OK.

• | Check the Techline equipment for the latest software version.

• | Attempt to program the PCM. If the PCM still cannot be programmed properly, replace the PCM. You must program the replacement PCM.

4. Perform the crankshaft position system variation learn procedure. Refer to Crankshaft Position System Variation Learn .

### Functional Check

1. Clear the DTCs.
2. Perform the Powertrain On-Board Diagnostic System Check. Refer to Powertrain On Board Diagnostic (OBD) System Check .
3. Start the engine and run for one minute.
4. Check for DTCs using the scan tool.
5. If DTC P1336 is set, perform the crankshaft Position System Variation Learn Procedure. Refer to Crankshaft Position System Variation Learn
6. Connect the courtesy lamp socket to the right side sound insulator.
7. Install the right sound insulator. Refer to Instrument Panel Insulator Panel Replacement - Right Side .