Circuit/System Testing
WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition OFF, disconnect the X2 harness connector at the K1 accessory DC power control module.
- Ignition ON, command the accessory DC power control module Intermediate Voltage Control on the scan tool to turn On the 42 volt circuit.
- Test for 40-44 V between the 42 V reference output terminals 1 and 2 at the K1 accessory DC power control module.
- If less than the specified range, replace the K1 accessory DC power control module.
- If the accessory DC power control module 42 V output tests normal, replace the K43 power steering control module.