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HAC-218 < DTC/CIRCUIT DIAGNOSIS > [MANUAL AIR CONDITIONING] A/C ON SIGNAL A/C ON SIGNAL Component Function Check INFOID:0000000009652658 1. CHECK A/C ON SIGNAL With CONSULT 1. Turn ignition switch ON. 2. Operate blower motor. 3. Select “AIR CONDITIONER” of “BCM” using CONSULT. 4. Select “AIR COND SW” in “DATA MONITOR” mode. 5. Check A/C ON signal when the A/C switch is operated. Is the inspection result normal? YES >> INSPECTION END NO >> Refer to HAC-218, "Diagnosis Procedure" Diagnosis Procedure INFOID:0000000009652659 1. CHECK A/C ON SIGNAL 1. Turn ignition switch OFF. 2. Disconnect A/C amp. connector. 3. Turn ignition switch ON. 4. Check output waveform between A/C amp. harness connector and ground with using oscilloscope. Is the inspection result normal? YES >> Replace front A/C control (A/C amp.). Refer to HAC-238, "Removal and Installation" . NO >> GO TO 2. 2. CHECK A/C ON SIGNAL CIRCUIT FOR OPEN 1. Turn ignition switch OFF. 2. Disconnect BCM connector. 3. Check continuity between A/C amp. harness connector and BCM harness connector. Is the inspection result normal? YES >> GO TO 3. Monitor item Condition Status AIR COND SW A/C switch ON (A/C indicator: On OFF (A/C indicator: Off + − Output waveform A/C amp. Connector Terminal M49 13 Ground JPMIA0012GB A/C amp. BCM Continuity Connector Terminal Connector Terminal M49 13 M121 27 Existed |