Powertrain control module (PCM) service should normally consist of either PCM replacement or electrically erasable programmable read only memory (EEPROM) programming. If the diagnostic procedures require PCM replacement, inspect the PCM first to see if the correct part is being used.

Important: In order to prevent internal PCM damage, the ignition must be OFF when you disconnect or reconnect the power to the PCM. For example, disconnect the power when you work with the following components:

Important: When you diagnose or replace the PCM, remove any debris from the PCM connector surfaces before servicing the PCM module connector gaskets. Ensure that the gaskets are installed correctly. The gaskets prevent contamination intrusion into the PCM.

Important:: The replacement PCM MUST be programmed.

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 cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
3. Disconnect the engine coolant surge tank. Refer to Radiator Surge Tank Replacement in Engine Cooling.
4. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .



5. Remove PCM harness connector cover (1).
6. Loosen the connector retaining screws at each PCM connecto r(2), then remove connectors from the PCM.



7. Remove the PCM (1) from the mounting bracket by levering back the bracket retainers at each end, while lifting up the PCM.

Notice: Do not touch the connector pins or soldered components on the circuit board in order to prevent possible electrostatic discharge (ESD) damage to the PCM.

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




1. Install the PCM (1) to the mounting bracket.

Notice: Refer to Fastener Notice in the Preface section.




2. Connect the PCM connectors (2).

Tighten
Tighten the PCM connector end fasteners to 9 N·m (80 lb in).

3. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
4. Connect the engine coolant surge tank. Refer to Radiator Surge Tank Replacement in Engine Cooling.
5. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
6. If a new PCM is being installed, program the PCM.. Refer to Service Programming System (SPS) in Programming.
7. When ever the PCM or the negative battery cables have been disconnected, the Idle Learn procedure must be performed. Refer to Idle Learn , and the Crankshaft Variation procedure must be performed. Refer to Crankshaft Position System Variation Learn .