Diagnosis Procedure

DIAGNOSIS PROCEDURE CHART

Step	Action	YES	NO
1	CHECK STOP LAMP SWITCH CIRCUIT Turn ignition switch OFF. Check the stop lamp when depressing and releasing the brake pedal. Courtesy of SUZUKI OF AMERICA CORP. OK or NG	GO TO 4.	GO TO 2.
2	CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT Disconnect stop lamp switch harness connector. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 2. Check voltage between stop lamp switch terminal 1 and ground with SDT or tester. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Voltage: Battery voltage OK or NG	GO TO 4.	GO TO 3.
3	DETECT MALFUNCTIONING PART Check the following. 10A fuse (No. 12) Fuse block (J/B) connector E160 Harness for open and short between stop lamp switch and battery	Repair open circuit, short to ground or short to power in harness or connectors.
4	CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT Disconnect ECM harness connector. Disconnect stop lamp switch harness connector. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2. Refer to WIRING DIAGRAM . Continuity should exist. Also check harness for short to ground and short to power. OK or NG	GO TO 5.	Repair open circuit, short to ground or short to power in harness or connectors.
5	CHECK STOP LAMP SWITCH Refer to [P1805 BRAKE SWITCH ]. OK or NG	GO TO 6.	Replace stop lamp switch.
6	CHECK INTERMITTENT INCIDENT Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ]	INSPECTION END