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.
3. Remove the air cleaner assembly cover.
4. Remove the PCM cover shield (1).

Remove the PCM from the mounting bracket.

5. Disconnect the harness connectors from the PCM.
6. Remove the PCM from the engine compartment.

### Installation Procedure

1. Connect the harness connectors to the PCM.
2. Install the PCM into the mounting bracket.
3. Install the PCM cover shield (1).
4. Install the air cleaner assembly cover.
5. Connect the negative battery cable.
6. If a new PCM is being installed, program the PCM.
7. Perform the crankshaft position system variation learn procedure. Refer to Crankshaft Position System Variation Learn

### EEPROM Programming

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

• | The battery is fully charged.

• | The ignition is ON.

• | The Techline equipment cable 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.

### Functional Check

1. Perform the On-Board Diagnostic System Check.
2. Start the engine and the engine run for one minute.
3. Use the scan tool in order to scan for the DTCs.