Diagnosis Procedure

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 ECT SENSOR POWER SUPPLY CIRCUIT Disconnect engine coolant temperature (ECT) sensor harness connector. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 2. Turn ignition switch ON. 3. Check voltage between ECT sensor terminal 1 and ground with SDT or tester. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Voltage: Approximately 5V OK or NG	GO TO 3.	Repair open circuit or short to ground or short to power in harness or connectors.
3	CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT Turn ignition switch OFF. Disconnect ECM harness connector. Check harness continuity between ECT sensor terminal 2 and ECM terminal 67. Refer to WIRING DIAGRAM . Continuity should exist. Also check harness for short to ground and 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 ENGINE COOLANT TEMPERATURE SENSOR Refer to [P0117, P0118 ECT SENSOR ]. OK or NG	GO TO 5.	Replace engine coolant temperature sensor.
5	CHECK INTERMITTENT INCIDENT Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ]	INSPECTION END