Procedure For Malfunction A

DIAGNOSIS PROCEDURE

Step	Action	YES	NO
1	CHECK GROUND CONNECTIONS Turn ignition switch OFF. Loosen and retighten three ground screws on the body. Refer to [POWER SUPPLY AND GROUND CIRCUIT CHECK ]. Courtesy of SUZUKI OF AMERICA CORP. OK or NG	GO TO 2.	Repair or replace ground connections.
2	CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT Disconnect heated oxygen sensor 2 harness connector. Courtesy of SUZUKI OF AMERICA CORP. 2. Disconnect ECM harness connector. 3. Check harness continuity between HO2S2 terminal 4 and ECM terminal 78. Refer to WIRING DIAGRAM . Continuity should exist. 4. Also check harness for short to ground and short to power. OK or NG	GO TO 3.	Repair open circuit or short to ground or short to power in harness or connectors.
3	CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT Check harness continuity between ECM terminal and HO2S2 terminal as follows. Refer to WIRING DIAGRAM . Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Continuity should exist. 2. Check harness continuity between the following terminals and ground. Refer to WIRING DIAGRAM . Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Continuity should not exist. 3. Also check harness for short to power. OK or NG	GO TO 4.	Repair open circuit or short to ground or short to power in harness or connectors.
4	CHECK HO2S2 CONNECTOR FOR WATER Check connectors for water. Water should not exist. OK or NG	GO TO 5.	Repair or replace harness or connectors.
5	CHECK HEATED OXYGEN SENSOR 2 Refer to [P0138, P0158 HO2S2 ]. OK or NG	GO TO 6.	Replace malfunctioning heated oxygen sensor 2.
6	CHECK INTERMITTENT INCIDENT Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ]	INSPECTION END