Diagnosis Procedure

DIAGNOSIS PROCEDURE CHART

Step	Action	YES	NO
1	CHECK GROUND CONNECTIONS Turn ignition switch OFF. Loosen and retighten two 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 AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT Disconnect air fuel ratio (A/F) sensor 1 harness connector. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 2. Turn ignition switch ON. 3. Check voltage between A/F sensor 1 terminal 3 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. Harness connectors E2, F32 IPDM E/R harness connector E119 15A fuse (No. 54) Harness for open or short between A/F sensor 1 and fuse	Repair or replace harness or connectors.
4	CHECK A/F SENSOR 1 HEATER OUTPUT SIGNAL CIRCUIT Turn ignition switch OFF. Disconnect ECM harness connector. Check harness continuity between ECM terminal 2 and A/F sensor 1 terminal 4. 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 A/F SENSOR 1 HEATER Refer to [P0031, P0032 A/F SENSOR 1 HEATER ]. OK or NG	GO TO 6.	GO TO 7.
6	CHECK INTERMITTENT INCIDENT Perform [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: WORK FLOW ] OK or NG	GO TO 7.	Repair or replace.
7	REPLACE AIR FUEL RATIO (A/F) SENSOR 1 Replace air fuel ratio (A/F) sensor 1.	INSPECTION END