Test Description

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The number(s) below refer to the step number(s) on the diagnostic table.

3. This step tests for the proper operation of the circuit in the high voltage range.
4. This step tests for the proper operation of the circuit in the low voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to voltage.

Fig 1: DTC B2647 Diagnosis (Steps 1-3)
Courtesy of GENERAL MOTORS CORP.

Fig 2: DTC B2647 Diagnosis (Steps 4-12)
Courtesy of GENERAL MOTORS CORP.