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.
- Engine running measure and record the voltage at the battery terminals. Verify that the battery voltage is 12.5-15.5 volts.
- If the battery voltage is not within the specified range, refer to Charging System Test
- Engine running, observe the scan tool BCM Battery Positive Voltage parameter. Verify that the scan tool displays a value that is within 2 volts of the battery voltage recorded in step 1.
- If the scan tool parameter is not within the specified range, refer to Circuit/System Testing .
- Refer to Diagnostic Aids .