Notice: In order to prevent internal damage to the PCM, the ignition must be OFF when disconnecting or reconnecting the PCM connector.

Service of the PCM should normally consist of either replacement of the PCM, EEPROM re-programming.

If the diagnostic procedures call for the PCM to be replaced, the PCM should be checked first to see if it is the correct part. DTC P0601 indicates the EEPROM programming has malfunctioned. When DTC P0601 is obtained, re-program the EEPROM.

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

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.

THE SERVICE PCM EEPROM WILL NOT BE PROGRAMMED. DTC P0602 indicates the EEPROM is not programmed or has malfunctioned.

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.
2. Disconnect the negative battery. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
3. Disconnect the IAT sensor electrical connector.
4. Remove the 3 bolts from the inner fender brace and remove the brace.
5. Loosen the clamps securing the air intake duct/MAF sensor to the air cleaner housing and throttle body.
6. Carefully remove the air intake duct/MAF sensor from the throttle body and air cleaner housing (1).



7. Remove the 2 screws (2) from the 2 air cleaner housing sections.
8. Remove the air cleaner housing cover assembly.
9. Without disconnecting the PCM connectors, remove the PCM (4) and harness from the PCM housing (3).
10. Disconnect the PCM connectors.

Important:  If a new PCM is being installed, program the EEPROM.

1. Reconnect the PCM connectors.
2. Carefully reinstall the PCM (4) and harness into the PCM housing (3).



3. Reinstall the air cleaner housing cover assembly (1).
4. Reinstall the 2 screws from the 2 air cleaner housing sections.
5. Carefully reinstall the air intake duct to the throttle body and air cleaner housing.
6. Tighten the clamp securing the air intake duct to the air cleaner housing.
7. Position the inner fender brace and reinstall the 3 bolts.

1. The ignition is ON.
2. If the PCM fails to program, check the Techline equipment for the latest software version.
3. Attempt to program the PCM. If the PCM still cannot be programmed properly, replace the PCM. The replacement PCM must be programmed.
4. If replacing the PCM, perform Crankshaft Position System Variation Learn .

The replacement PCM will NOT allow Secondary AIR Pump operation until a total of 10 miles have accumulated.

1. Perform a Powertrain On Board Diagnostic (OBD) System Check .
2. Start the engine and allow the engine run for one minute.
3. Use the scan tool in order to scan for the DTCs.