Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.

DIAGNOSIS PROCEDURE

Step	Action	YES	NO
1	CHECK ECM POWER SUPPLY Turn ignition switch OFF. Disconnect ECM harness connector. Check voltage between ECM terminal 121 and ground with SDT or tester. Courtesy of SUZUKI OF AMERICA CORP. Voltage: Battery voltage OK or NG	GO TO 3.	GO TO 2.
2	DETECT MALFUNCTIONING PART Check the following. 20A fuse (No. 53) IPDM E/R harness connector E121 Harness for open or short between ECM and battery	Repair open circuit in harness or connectors.
3	CHECK INTERMITTENT INCIDENT Refer to [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: INTERMITTENT INCIDENT ] OK or NG	GO TO 4.	Repair or replace harness or connectors.
4	PERFORM DTC CONFIRMATION PROCEDURE With SDT Turn ignition switch ON. Select "DTC check" mode with SDT. Touch "Clear". Perform DTC Confirmation Procedure. See [P0603 ECM POWER SUPPLY ]. Is the 1st trip DTC P0603 displayed again? With GST Turn ignition switch ON. Select Service $04 with GST. Perform DTC Confirmation Procedure. See [P0603 ECM POWER SUPPLY ]. Is the 1st trip DTC P0603 displayed again? Yes or No	GO TO 5.	INSPECTION END
5	REPLACE ECM Replace ECM. Perform initialization of immobilizer system and registration of all immobilizer system ignition key IDs. Refer to [ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT: SPECIAL REPAIR REQUIREMENT ] Perform VIN Registration . Perform Accelerator Pedal Released Position Learning . Perform Throttle Valve Closed Position Learning . Perform Idle Air Volume Learning .	INSPECTION END