Service of the powertrain control module (PCM) should consist of either replacement of the PCM or electrically erasable programmable read only memory (EEPROM) programming. If diagnostic procedures call for the PCM to be replaced, the replacement PCM should be checked to ensure that the correct part is being used. If the correct part is being used, remove the faulty PCM and install the new service PCM.
| Important: To prevent internal PCM damage, the ignition must be OFF when disconnecting or reconnecting power to the PCM. For example, when working with a battery cable, PCM pigtail, PCM fuse, or jumper cables. |
| • | Remove any debris from the PCM connector surfaces before servicing the PCM. Inspect the PCM module connector gaskets when diagnosing or replacing the PCM. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the PCM. |
| • | The replacement PCM must be programmed. |
Removal Procedure
- Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
- Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
- If equipped with regular production option (RPO) NYS, remove the harness ground from the clip attached to the PCM cover.
- Release the PCM cover from the mounting tabs on the PCM bracket.
- Remove the PCM cover.
- Loosen the PCM harness connector bolts (2).
- Disconnect the PCM harness connectors.
- Release the spring latch holding the PCM.
- Remove the PCM.
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.
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.
Installation Procedure
- Install the PCM.
- Secure the spring latch to the PCM.
- Connect the PCM connectors.
- Tighten the PCM harness connector bolts (2).
- Install the PCM cover.
- Snap the PCM cover over the mounting tabs on the PCM bracket.
- If equipped with RPO NYS, install the harness ground to the clip attached to the PCM cover.
- Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
- If a new PCM is being installed, program the PCM. Refer to Powertrain Control Module Programming .
Notice: Refer to Fastener Notice in the Preface section.
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.
Tighten
Tighten the bolts to 8 N·m (70 lb in).
