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OPTICAL SENSOR EXL-53 < DTC/CIRCUIT DIAGNOSIS > C D E F G H I J K M A B EXL N O P OPTICAL SENSOR Description INFOID:0000000009478483 The optical sensor converts the outside brightness (lux) to voltage and transmits the optical sensor signal to the BCM. Diagnosis Procedure INFOID:0000000009478484 Regarding Wiring Diagram information, refer to . 1. CHECK OPTICAL SENSOR GROUND CIRCUIT 1. Turn the ignition switch OFF. 2. Disconnect BCM connector M18 and optical sensor connector M14. 3. Check continuity between BCM harness connector and optical sensor harness connector. 4. Check continuity between BCM harness connector and ground. Are continuity results as specified? YES >> GO TO 2 NO >> Repair harness or connector. 2. CHECK OPTICAL SENSOR SIGNAL CIRCUIT 1. Check continuity between BCM harness connector and optical sensor harness connector. 2. Check continuity between BCM harness connector and ground. Are the continuity results as specified? YES >> Replace the optical sensor. Refer to EXL-149, "Removal and Installation" NO >> Repair harness or connector. BCM Optical sensor Continuity Connector Terminal Connector Terminal M18 18 M14 3 Yes BCM — Continuity Connector Terminal M18 18 Ground No BCM Optical sensor Continuity Connector Terminal Connector Terminal M20 58 M14 4 Yes BCM — Continuity Connector Terminal M20 58 Ground No |