Diagnosis Procedure

DIAGNOSIS PROCEDURE CHART

Step	Action	YES	NO
1	CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I Turn ignition switch OFF. Disconnect ECM harness connector. Check resistance between ECM terminal 15 and ground. Refer to WIRING DIAGRAM . NOTE: It is necessary to use an ohmmeter which can measure more than 10 MΩ. Resistance: Approximately 532 - 588 kΩ [at 20 °C (68 °F)] Also check harness for short to ground and short to power. OK or NG	GO TO 4.	GO TO 2.
2	CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II Disconnect knock sensor harness connector. Courtesy of SUZUKI OF AMERICA CORP. 2. Check harness continuity between ECM terminal 15 and knock sensor terminal 1. Refer to WIRING DIAGRAM . Continuity should exist. 3. Also check harness for short to ground and short to power. OK or NG	GO TO 3.	Repair open circuit, short to ground or short to power in harness or connectors.
3	CHECK KNOCK SENSOR Refer to [Component Inspection ]. OK or NG	GO TO 4.	Replace knock sensor.
4	CHECK GROUND CONNECTIONS 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 5.	Repair or replace ground connections.
5	CHECK KNOCK SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT Disconnect knock sensor harness connector. Check harness continuity between knock sensor terminal 2 and ground. Refer to WIRING DIAGRAM . Continuity should exist. OK or NG	GO TO 6.	GO TO 7.
6	DETECT MALFUNCTIONING PART Check the following. Harness connectors F14, E5 Harness for open or short between knock sensor and ground	Repair open circuit or short power in harness or connectors.
7	CHECK INTERMITTENT INCIDENT Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ]	INSPECTION END