Diagnosis Procedure

Regarding Wiring Diagram information, refer to [AUTO LIGHT SYSTEM: WIRING DIAGRAM ].

Step	Action	YES	NO
1	CHECK OPTICAL SENSOR GROUND CIRCUIT  Turn the ignition switch OFF. Courtesy of SUZUKI OF AMERICA CORP. Courtesy of SUZUKI OF AMERICA CORP. 2. Disconnect BCM connector M18 and optical sensor connector M145. 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?	GO TO 2	Repair harness or connector.
2	CHECK OPTICAL SENSOR SIGNAL CIRCUIT  Check continuity between BCM harness connector and optical sensor harness connector. 2. Check continuity between BCM harness connector and ground. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Are continuity results as specified?	Replace the optical sensor. Refer to [Optical Sensor: Removal and Installation ].	Repair the harnesses or connectors.