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Test B: Air RECIRCULATION Malfunction

WARNING: This page is about a different car, the 2002 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For correct circuit identification and connector terminal locations, see CONNECTOR IDENTIFICATION  and/or WIRING DIAGRAMS .
NOTE: Definition: Air recirculation is inoperative or is always on.
  1. Perform DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. Go to next step.
  2. Start engine. Place mode switch in VENT position. Place blower motor switch in maximum speed position. Place outside air switch in ON position. Place recirculation switch in ON position. If recirculation door moves from recirculation position to outside air position, go to next step. If recirculation door does not move from recirculation position to outside air position, go to step  4.
  3. Place mode switch in DEFROST position. If recirculation door moves to outside air position, problem is intermittent. Check wiring and connections. If recirculation door does not move to outside air position, go to step  8.
  4. If air temperature switch operates properly, go to VACUUM CONTROL SYSTEM CHECK  under SYSTEM TESTS. If air temperature switch does not operate properly, go to next step.
  5. Test ignition "3" voltage circuit of HVAC control assembly for an open, high resistance, or short to ground. Repair as necessary, then go to step  10. If circuit is okay, go to next step.
  6. Test battery positive voltage circuit of HVAC control assembly for an open, high resistance, or short to ground. Repair as necessary, then go to step  10. If circuit is okay, go to next step.
  7. Test ground circuit of HVAC control assembly for an open or high resistance. Repair as necessary, then go to step  10. If circuit is okay, go to next step.
  8. Inspect for poor connections at HVAC control assembly harness connector. Repair as necessary, then go to step  10. If connections are okay, go to next step.
  9. Replace HVAC control assembly. See HVAC CONTROL ASSEMBLY  under REMOVAL & INSTALLATION. After replacement, go to next step.
  10. Operate system to verify repair. If system operates properly, system is okay. If system does not operate properly, go to step  2.
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