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MAGNET CLUTCH HAC-51 < DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONER] C D E F G H J K L M A B HAC N O P NO >> Repair harness or connector. 4. CHECK MAGNET CLUTCH CIRCUIT 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-19, "CONSULT-III Function (BCM - AIR CONDITIONER)" Is the inspection result normal? YES >> GO TO 8. NO >> GO TO 6. 6. CHECK CIRCUIT CONTINUITY BETWEEN BCM AND FRONT AIR CONTROL 1. Turn ignition switch OFF. 2. Disconnect BCM connector and front air control connector. 3. Check continuity between BCM harness connector M18 (A) ter- minal 27 and front air control harness connector M49 (B) termi- nal 4. 4. Check continuity between BCM harness connector M18 (A) ter- minal 27 and ground. Is the inspection result normal? YES >> GO TO 7. NO >> Repair harness or connector. 7. CHECK VOLTAGE FOR FRONT AIR CONTROL (A/C COMPRESSOR ON SIGNAL) 1. Reconnect BCM connector and front air control connector. 2. Turn ignition switch ON. 3. Check voltage between front air control harness connector M49 terminal 4 and ground. Is the inspection result normal? YES >> GO TO 8. SJIA0197E A/C SWITCH ON :AIR COND SW ON A/C SWITCH OFF :AIR COND SW OFF 27 - 4 Continuity should exist. 27 - ground Continuity should not exist. AWIIA0416ZZ Terminals Condition Voltage (+) (-) Front air con- trol connec- tor Terminal No. M49 4 Ground A/C switch: ON Approx. 0V A/C switch: OFF Approx. 5V AWIIA0417ZZ |