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HAC-62 < DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING] BLOWER FAN ON SIGNAL BLOWER FAN ON SIGNAL Component Function Check INFOID:0000000009951009 1. CHECK BLOWER FAN ON SIGNAL With CONSULT 1. Turn the ignition switch ON. 2. Select the “FAN REQ SIG” in “DATA MONITOR” 3. Check the fan ON signal when the fan control switch is operated. Is inspection result normal? YES >> INSPECTION END NO >> Refer to Diagnosis Procedure INFOID:0000000009951010 1. CHECK BLOWER FAN ON SIGNAL 1. Turn the ignition switch ON. 2. Check output waveform between A/C auto amp. and ground with using the oscilloscope. Is inspection result normal? YES >> GO TO 2. NO >> Replace the A/C auto amp. 2. CHECK CONTINUITY BETWEEN A/C AUTO AMP. AND BCM 1. Turn the ignition switch OFF. 2. Disconnect the A/C auto amp. connector. 3. Disconnect the BCM connector. 4. Check continuity A/C auto amp. harness connector and BCM harness connector. Is inspection result normal? YES >> GO TO 3. NO >> Repair the harnesses or connectors. 3. CHECK CONTINUITY BETWEEN A/C AUTO AMP. AND GROUND Check continuity between A/C auto amp. harness connector and ground. Monitor item Condition Status FAN REQ SIG Fan control switch OFF position Off Except OFF position On (+) ( − ) Condition Output waveform A/C auto amp. — Connector Terminal M51 35 Ground • Ignition switch ON SJIA1425J A/C auto amp. BCM Continuity Connector Terminal Connector Terminal M51 35 M65 (WITHOUT I-KEY) M68 (WITH I-KEY) 28 Existed |