Diagnostic Aids

WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

If a short to B+ is present a history U1301 or U1305 will set in the modules. Refer to DTC U1300, U1301, OR U1305 .
If a short to ground is present, a history U1300 or U1305 will set in the modules. Refer to DTC U1300, U1301, OR U1305 .
Disconnecting modules and turning the ignition switch to RUN may cause DTCs in these modules. Check for DTCs in each module upon completion of the required repair.
The scan tool cannot directly communicate to the Rear Video/Audio/HVAC or Video Disc Player. Diagnosis is accomplished by checking communications with the Radio.