Test Description

WARNING: This page is about a different car, the 2002 Pontiac Montana, 2002 Oldsmobile Silhouette, and 2002 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

12. The measured voltage should be near the specified values for each mode position.
14. 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: Air Delivery Improper (1 Of 2)
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Fig 2: Air Delivery Improper (2 Of 2)
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Fig 3: Air Delivery Improper - Auxiliary (1 Of 2)
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Fig 4: Air Delivery Improper - Auxiliary (2 Of 2)
Courtesy of GENERAL MOTORS CORP.