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EXL-124 < DTC/CIRCUIT DIAGNOSIS > OPTICAL SENSOR OPTICAL SENSOR Description INFOID:0000000009175383 The optical sensor measures ambient light and transmits the optical sensor signal to the BCM. Component Function Check INFOID:0000000009175384 1. CHECK OPTICAL SENSOR SIGNAL TO BCM CONSULT 1. Turn the ignition switch ON. 2. Select OPTI SEN (DTCT) of BCM (HEAD LAMP) DATA MONITOR item. 3. Turn the lighting switch to AUTO. *:Outside light varies. The value may be less than the standard value if brightness is weak. Is the inspection result normal? YES >> Optical sensor is normal. NO >> Refer to EXL-124, "Diagnosis Procedure" . Diagnosis Procedure INFOID:0000000009175385 Regarding Wiring Diagram information, refer to . 1. CHECK OPTICAL SENSOR POWER SUPPLY INPUT 1. Turn ignition switch ON. 2. Turn lighting switch AUTO. 3. Check voltage between optical sensor harness connector and ground. Is the inspection result normal? YES >> GO TO 2. NO >> GO TO 4. 2. CHECK OPTICAL SENSOR GROUND INPUT Check voltage between optical sensor harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> GO TO 6. 3. CHECK OPTICAL SENSOR SIGNAL OUTPUT With illuminating the optical sensor, check voltage between optical sensor harness connector and ground. Monitor item Condition Voltage (Approx.) OPTI SEN (DTCT) When outside of vehicle is bright 3.1 V or more * When outside of vehicle is dark 0.6 V or less (+) ( −) Voltage (Approx.) Optical sensor Connector Terminal M15 1 Ground 5 V (+) ( −) Voltage (Approx.) Optical sensor Connector Terminal M15 3 Ground 0 V |