Circuit/System Verification
WARNING: This page is about a different car, the 2009 GMC Canyon and 2009 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
- Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6 and 15.0 volts.
- If not within the specified range, refer to Charging System Test .
- Observe the scan tool BCM Battery Voltage Signal parameter and the Batt. Voltage High Res. parameter. The readings for both parameters should be between 12.6 and 15.0 volts, and should be within 1.5 volts of each other.