Test B: Air RECIRCULATION Malfunction

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

NOTE: For circuit reference, see CONNECTOR IDENTIFICATION and/or WIRING DIAGRAMS .

NOTE: Definition: Air recirculation is inoperative or always On.

If diagnostic system test has been performed, go to next step. If diagnostic system check has not been performed, go to DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
Turn ignition on. Place blower switch in OFF position. If blower motor is off, go to next step. If blower motor is on, go to TEST C: BLOWER MOTOR ALWAYS ON .
Place blower switch in each speed position. If blower motor operates at all, go to next step. If blower motor does not operate, go to TEST D: BLOWER MOTOR INOPERATIVE .
If blower motor operates correctly for each speed position, go to next step. If blower motor does not operate correctly for each speed position, go to TEST E: BLOWER MOTOR MALFUNCTION .
Start engine. Place blower switch in maximum speed position. Place mode switch in each mode position. If air flows from the correct air distribution outlet in each mode selected, go to next step. If air does not flow from the correct distribution outlet in each mode selected, go to VACUUM CONTROL SYSTEM DIAGNOSTICS under SYSTEM TESTS.
Alternately place mode control switch between MAX position and VENT. If recirculation door operates properly, problem is intermittent. Check for faulty wiring or poor connections and repair as necessary. If recirculation door does not operate properly, go to VACUUM CONTROL SYSTEM DIAGNOSTICS under SYSTEM TESTS.