Circuit/System Testing
WARNING: This page is about a different car, the 2012 GMC Yukon, 2012 Chevrolet Tahoe, and 2012 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
Ignition ON, command the K1 accessory DC power control module set point control UP and DOWN with a scan tool. Observe the 12 V battery voltage with a DMM. The 12 V battery voltage should follow the voltage set point command.
- If the voltage is not the specified value, replace the K1 accessory DC power control module.