Test Description

WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. 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.

4. Tests for voltage at the vacuum control assembly.
5. Verifies that the HVAC control module is providing ground to the vacuum control assembly.
6. Tests if ground is constantly being applied to the vacuum control assembly.

Fig 1: Air Recirculation Malfunction, Testing Procedures (1 of 2)

Courtesy of GENERAL MOTORS CORP.

Fig 2: Air Recirculation Malfunction, Testing Procedures (2 of 2)

Courtesy of GENERAL MOTORS CORP.