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MAGNET CLUTCH HAC-71 < DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER] C D E F G H J K L M A B HAC N O P Check for operation sound when applying battery voltage direct cur- rent to terminal. YES >> Replace IPDM E/R. Refer to . NO >> Replace magnet clutch. Refer to Installation for Compressor Clutch" 5. CHECK BCM INPUT (COMPRESSOR ON) SIGNAL Check compressor ON/OFF signal. Refer to HAC-23, "AIR CONDITIONER : CONSULT-III Function (BCM - . Is the inspection result normal? YES >> GO TO 8. NO >> GO TO 6. 6. CHECK CIRCUIT CONTINUITY BETWEEN BCM AND A/C AUTO AMP. 1. Turn ignition switch OFF. 2. Disconnect BCM connector and A/C auto amp. connector. 3. Check continuity between BCM harness connector M18 terminal 27 and A/C auto amp. harness connec- tor M49 terminal 4. 4. Check continuity between BCM harness connector M18 terminal 27 and ground. Is the inspection result normal? YES >> GO TO 7. NO >> Repair harness or connector. 7. CHECK VOLTAGE FOR A/C AUTO AMP. (A/C COMPRESSOR ON SIGNAL) 1. Reconnect BCM connector and A/C auto amp. connector. 2. Turn ignition switch ON. 3. Check voltage between A/C auto amp. harness connector M49 terminal 4 and ground. Is the inspection result normal? YES >> GO TO 8. NO-1 >> If the voltage is approx. 5V when A/C switch is ON, replace A/C auto amp. Refer to . NO-2 >> If the voltage is approx. 0V when A/C switch is OFF, replace BCM. Refer to . SJIA0197E A/C SW ON : AIR COND SW ON A/C SW OFF : AIR COND SW OFF 27 - 4 Continuity should exist. 27 - ground Continuity should not exist. Terminals Condition Voltage (+) (-) A/C auto amp. con- nector Terminal No. M49 4 Ground A/C switch: ON Approx. 0V A/C switch: OFF Approx. 5V AWIIA0200ZZ 2011 Pathfinder |