Diagnosis Procedure

DIAGNOSIS PROCEDURE

Step	Action	YES	NO
1	INSPECTION START Start engine. Is engine running? Yes or No	GO TO 8.	GO TO 2.
2	CHECK ECM POWER SUPPLY CIRCUIT-I Turn ignition switch OFF and then ON. Check voltage between ECM terminal 109 and ground with SDT or tester. Courtesy of SUZUKI OF AMERICA CORP. Voltage: Battery voltage OK or NG	GO TO 4.	GO TO 3.
3	DETECT MALFUNCTIONING PART Check the following. Fuse block (J/B) connector M4 Harness connectors M31, E152 10A fuse (No. 1) Harness for open or short between ECM and fuse	Repair harness or connectors.
4	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 5.	Repair or replace ground connections.
5	CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-I Disconnect ECM harness connector. Check harness continuity between ECM terminals 1, 115, 116 and ground. Refer to WIRING DIAGRAM . Continuity should exist. Also check harness for short to power. OK or NG	GO TO 7.	GO TO 6.
6	DETECT MALFUNCTIONING PART Check the following. Harness connectors F32, E2 Harness for open or short between ECM and ground	Repair open circuit or short to power in harness or connectors.
7	CHECK ECM POWER SUPPLY CIRCUIT-II Reconnect ECM harness connector. Turn ignition switch ON. Check voltage between IPDM E/R connector E119 terminal 3 and ground with SDT or tester. Courtesy of SUZUKI OF AMERICA CORP. Voltage: Battery voltage OK or NG	Go to. [IGNITION SIGNAL CIRCUIT CHECK ]	GO TO 8.
8	CHECK ECM POWER SUPPLY CIRCUIT-III Turn ignition switch OFF and wait at least 10 seconds. Turn ignition switch ON and then OFF. Check voltage between ECM terminals 119, 120 and ground with SDT or tester. Courtesy of SUZUKI OF AMERICA CORP. Voltage: After turning ignition switch OFF, battery voltage will exist for a few seconds, then drop approximately 0V. OK or NG	GO TO 13.	GO TO 9.
9	CHECK ECM POWER SUPPLY CIRCUIT-IV Check voltage between ECM terminal 111 and ground with SDT or tester. Voltage: Battery voltage OK or NG	GO TO 10.	GO TO 11.
10	CHECK ECM POWER SUPPLY CIRCUIT-V Disconnect ECM harness connector. Disconnect IPDM E/R harness connector E119. Check harness continuity between ECM terminals 119, 120 and IPDM E/R 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 16.	Repair open circuit or short to ground or short to power in harness or connectors.
11	CHECK ECM POWER SUPPLY CIRCUIT-VI Disconnect ECM harness connector. Disconnect IPDM E/R harness connector E119. Check harness continuity between ECM terminal 111 and IPDM E/R terminal 7. Refer to WIRING DIAGRAM . Continuity should exist. Also check harness for short to ground and short to power. OK or NG	GO TO 12.	Repair open circuit or short to ground or short to power in harness or connectors.
12	CHECK 20A FUSE Disconnect 20 A fuse (No. 53) from IPDM E/R. Check 20 A fuse. OK or NG	GO TO 16.	Replace 20A fuse.
13	CHECK GROUND CONNECTIONS Loosen and retighten three ground screws on the body. Refer to [POWER SUPPLY AND GROUND CIRCUIT CHECK ]. OK or NG	GO TO 14.	Repair or replace ground connections.
14	CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT-II Check harness continuity between ECM terminals 1, 115, 116 and ground. Refer to WIRING DIAGRAM . Continuity should exist. Also check harness for short to power. OK or NG	GO TO 16.	GO TO 15.
15	DETECT MALFUNCTIONING PART Check the following. Harness connectors F32, E2 Harness for open or short between ECM and ground	Repair open circuit or short to power in harness or connectors.
16	CHECK INTERMITTENT INCIDENT Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ] OK or NG	Replace IPDM E/R.	Repair open circuit or short to power in harness or connectors.