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DEF-12 < DTC/CIRCUIT DIAGNOSIS > REAR WINDOW DEFOGGER SWITCH REAR WINDOW DEFOGGER SWITCH Description INFOID:0000000009722497 • The rear window defogger is operated by turning the rear window defogger switch ON. Component Function Check INFOID:0000000009722498 1. CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION Check that the indicator lamp of rear window defogger illuminates when rear window defogger switch ON. YES >> Rear window defogger switch function is OK. NO >> Refer to Diagnosis Procedure INFOID:0000000009722499 WITH BOSE AUDIO SYSTEM 1. CHECK PRESET SWITCH (REAR WINDOW DEFOGGER SWITCH) Does preset switch operate normally? • With navigation system. Refer to . Is the inspection result normal? YES >> INSPECTION END NO >> Replace preset switch (rear window defogger switch). Refer to AV-285, "Removal and Installation" . (without navigation system) or AV-457, "Removal and Installation" (with navigation system). WITHOUT BOSE AUDIO SYSTEM 1. CHECK AUTO A/C Check the operating condition of auto A/C Does auto A/C operate normally? YES >> GO TO 2. NO >> Perform auto A/C diagnosis. Refer to HAC-108, "Diagnosis Chart By Symptom" 2. CHECK BCM OUTPUT SIGNAL 1. Turn ignition switch OFF. 2. Disconnect A/C auto amp. connector. 3. Turn ignition switch ON. 4. Check voltage between A/C auto amp. harness connector and ground by oscilloscope. Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 3. 3. CHECK REAR WINDOW DEFOGGER SWITCH CIRCUIT (+) (-) voltage (Approx.) A/C auto amp. Connector Terminal M50 27 Ground JPMIA0012GB |