Main Power Supply and Ground Circuit Check

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

DIAGNOSTIC PROCEDURE

Step	Action	YES	NO
1	CHECK TCM POWER SOURCE STEP 1 Turn ignition switch OFF. Disconnect A/T assembly harness connector. Check voltage between A/T assembly harness connector terminals and ground. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. OK or NG	GO TO 2.	GO TO 3.
2	CHECK TCM POWER SOURCE STEP 2 Disconnect A/T assembly harness connector. Turn ignition switch ON. (Do not start engine.) Check voltage between A/T assembly harness connector terminals and ground. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. OK or NG	GO TO 4.	GO TO 3.
3	DETECT MALFUNCTIONING ITEM Check the following. Harness for short or open between battery and A/T assembly harness connector terminals 1, 2 Harness for short or open between ignition switch and A/T assembly harness connector terminal 6 10A fuse (No. 22, located in the fuse and fusible link block) and 10A fuse (No. 49, located in the IPDM E/R) Ignition switch. Refer to [IGNITION POWER SUPPLY: WIRING DIAGRAM ] OK or NG	GO TO 4.	Repair or replace damaged parts.
4	CHECK TCM GROUND CIRCUIT Turn ignition switch OFF. Disconnect A/T assembly harness connector. Check continuity between A/T assembly harness connector terminals and ground. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. If OK, check harness for short to ground and short to power. OK or NG	GO TO 5.	Repair open circuit or short to ground or short to power in harness or connectors.
5	DETECT MALFUNCTIONING ITEM Check the following. The A/T assembly harness connector terminals for damage or loose connection with harness connector. OK or NG	GO TO 6.	Repair or replace damaged parts.
6	PERFORM DTC CHECK Perform "DTC check". Refer to [SDT FUNCTION (AT) ]. OK or NG	INSPECTION END	"DTC check" does not activate: GO TO 7.
7	CHECK TERMINAL CORD ASSEMBLY Remove control valve with TCM. Refer to [CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2: ON-VEHICLE REPAIR ]. Disconnect A/T assembly harness connector and TCM connector. Check continuity between A/T assembly harness connector terminals and TCM connector terminals. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 4. Check continuity between A/T assembly harness connector terminals and TCM connector terminals. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 5. If OK, check harness for short to ground and short to power. OK or NG	Replace the control valve with TCM. Refer to [CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2: ON-VEHICLE REPAIR ].	Replace open circuit or short to ground and short to power in harness or connectors.