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HAC-118 < DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING] DOOR MOTOR DOOR MOTOR Diagnosis Procedure INFOID:0000000009652567 NOTE: 1. CHECK DOOR MOTOR POWER SUPPLY 1. Turn ignition switch ON. 2. Check voltage between intake door motor harness connector and ground. Is the inspection result normal? YES >> GO TO 2. NO >> GO TO 7. 2. CHECK DOOR MOTOR GROUND CIRCUIT FOR OPEN 1. Turn ignition switch OFF. 2. Disconnect intake door motor and A/C auto amp. connector. 3. Check continuity between intake door motor harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> Repair harness or connector. 3. CHECK DOOR MOTOR LAN SIGNAL 1. Connect A/C auto amp. and intake door motor connector. 2. Turn ignition switch ON. 3. Confirm output waveform between A/C auto amp. harness connector and ground using oscilloscope. Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 6. 4. CHECK DOOR MOTOR LAN SIGNAL CIRCUIT FOR OPEN 1. Turn ignition switch OFF. 2. Disconnect A/C auto amp. and intake door motor connector. 3. Check continuity between A/C auto amp. harness connector and intake door motor harness connector. + − Voltage Intake door motor Connector Terminal M304 1 Ground 9.5 – 13.5 V Intake door motor — Continuity Connector Terminal M304 2 Ground Existed + − Output waveform A/C auto amp. Connector Terminal M50 5 Ground SJIA1453J |