Lucerne V6-3.8L (2007)
Engine Control Module: Service and Repair
Powertrain Control Module Replacement
Notice:
* Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control
module (battery cable, powertrain control module (PCM)/engine control module (ECM)/transaxle control module (TCM) pigtail, control module
fuse, jumper cables, etc.) in order to prevent internal control module damage.
* Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery
voltage when servicing a control module, using battery booster cables, or when charging the vehicle battery.
* In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components
on the circuit board.
* Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector
gaskets when diagnosing or replacing the control module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion
into the control module.
* The replacement control module must be programmed.
Important: It is necessary to record the remaining engine oil life. If the powertrain control module (PCM) is not programed with the remaining
engine oil life, the engine oil life will default to 100%. If the replacement PCM 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 oil change.
Important: It is necessary to record the remaining automatic transaxle fluid life. If the replacement PCM is not programed with the remaining
transaxle fluid life, the transaxle fluid life will default to 100 percent If the replacement PCM is not programmed with the remaining transaxle
fluid life, the transaxle fluid will need to be changed at 83000 km (50,000 mi) from the last transaxle fluid change.
Removal Procedure
1. Using a scan tool, retrieve the percentage of remaining engine oil and automatic transaxle fluid life. Record the remaining engine oil and transaxle
fluid life.
2. Ensure that the ignition is in the OFF position.
3. Disconnect the negative battery cable.
4. Remove the intake manifold cover.
5. Disconnect the engine harness electrical connector from the mass air flow/intake air temperature (MAF/IAT) sensor.
