Diagnostic Aids
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
- When the high voltage fuse is open the vehicle will not start.
- Test for HVIC circuit operation by lifting up on the high voltage manual disconnect lever to disengage the HVIC circuit. Monitor the HVIC source and return current on the scan tool. HVIC return current should read 0 ma when the high voltage manual disconnect lever is lifted.
- If this DTC sets when the manual disconnect lever is removed, the HVIC circuit may have a wire to wire short on the HVIC source and return circuits between the X350 and the HV manual disconnect lever connector.
- If the HV fuse opens as soon as the high voltage manual disconnect is installed and the HV contactor relays are not stuck closed, The problem is internal to the drive motor generator battery assembly.