Test Description

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.

The number below refers to the step number on the diagnostic table.

9. The HVAC control module is supplied by two ignition 3 voltage circuits. Test the ignition 3 voltage circuit that does not supply the blower motor switch.

Fig 1: Diagnostic System Check - Air Recirculation Malfunction (1 Of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Diagnostic System Check - Air Recirculation Malfunction (2 Of 2)

Courtesy of GENERAL MOTORS CORP.