Circuit/System Verification

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON, verify that the charge indicator illuminates during the self test when the ignition is turned ON.
- If the charge indicator does not illuminate, replace the IPC.
Ignition ON, engine running, increase the engine speed to 1,500 RPM.
Verify that the scan tool Battery Voltage parameter is between 12.8-15.5 volts for the body control module (BCM), the engine control module (ECM)/powertrain control module (PCM), and the instrument panel cluster (IPC).
- If all of the Battery Voltage parameters are not within the specified range for all of the modules, refer to Charging System Test .

If the Battery Voltage parameter is not within the specified range for the BCM, refer to Body Control Module Voltage Out Of Range in Circuit/System Testing .

If the Battery Voltage parameter is not within the specified range for the ECM/PCM, refer to Engine Control Module/Powertrain Control Module Voltage Out Of Range in Circuit/System Testing .

If the Battery Voltage parameter is not within the specified range for the IPC, refer to Instrument Panel Cluster Voltage Out Of Range in Circuit/System Testing .