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BLOWER MOTOR CONTROL SYSTEM HAC-51 < COMPONENT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER] C D E F G H J K L M A B HAC N O P 1. Disconnect variable blower control (front) connector. 2. Check continuity between front blower motor harness connector Is the inspection result normal? YES >> GO TO 13. NO >> Repair harness or connector. 13. CHECK VARIABLE BLOWER CONTROL POWER SUPPLY CIRCUIT FOR OPEN 1. Disconnect front blower motor relay. 2. Check continuity between front blower motor relay harness con- Is the inspection result normal? YES >> GO TO 14. NO >> Repair harness or connector. 14. CHECK VARIABLE BLOWER CONTROL GROUND CIRCUIT Check continuity between variable blower control harness connector Is the inspection result normal? YES >> GO TO 15. NO >> Repair harness or connector. 15. CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT 1. Reconnect all disconnected component connectors. 2. Disconnect A/C auto amp. connector. 3. Turn ignition switch ON. 4. Press the blower (+) switch to maximum speed. 5. Check voltage between A/C auto amp. harness connector M49 Is the inspection result normal? YES >> Replace A/C auto amp. Refer to NO >> GO TO 16. 16. CHECK VARIABLE BLOWER CONTROL SIGNAL CIRCUIT FOR OPEN 1 - 2 : Continuity should exist. AWIIA0179ZZ 3 - 4 : Continuity should exist. AWIIA0243ZZ 1 - Ground : Continuity should exist. AWIIA0180ZZ 13 - Ground : Approx. 4.5V AWIIA1129ZZ 2009 Pathfinder |