Diagnosis Procedure

Regarding Wiring Diagram information, refer to [POWER DOOR LOCK SYSTEM: WIRING DIAGRAM [CREW CAB] ].

DIAGNOSIS PROCEDURE

Step	Action	YES	NO
1	CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL With SDT Check door lock/unlock switch ("CDL LOCK SW", "CDL UNLOCK SW") in "Data list" mode in SDT. Refer to [SDT FUNCTION (BCM - DOOR LOCK) ]. When door lock/unlock switch is turned to LOCK: CDL LOCK SW: ON When door lock/unlock switch is turned to UNLOCK: CDL UNLOCK SW: ON Without SDT Check voltage between BCM connector M19 terminals 45, 46 and ground. Is the inspection result normal?	Door lock/unlock switch circuit is OK.	GO TO 2
2	CHECK DOOR LOCK/UNLOCK SWITCH Turn ignition switch OFF. Disconnect door lock/unlock switch. Check continuity between main power window and door lock/unlock switch terminals 10, 11 and 14. Courtesy of 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. 4. Check continuity between power window and door lock/unlock switch RH terminals 1, 2 and 3. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Is the inspection result normal?	GO TO 3	Replace door lock/unlock switch.
3	CHECK DOOR LOCK/UNLOCK SWITCH GROUND HARNESS Disconnect main power window and door lock/unlock switch or power window and door lock/unlock switch RH. Check continuity between main power window and door lock/unlock switch connector D7 terminal 14 and ground. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 14 - Ground: Continuity should exist. 3. Check continuity between power window and door lock/unlock switch RH connector D105 terminal 3 and ground Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 3 - Ground: Continuity should exist. Is the inspection result normal?	GO TO 4	Repair or replace harness.
4	CHECK DOOR LOCK SWITCH CIRCUIT Disconnect BCM. Check continuity between BCM connector M19 terminal 45 and main power window and door lock/unlock switch connector D7 terminal 10 or power window and door lock/unlock switch RH connector D105 terminal 1. 1 - 45: Continuity should exist. 10 - 45: Continuity should exist. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 3. Check continuity between BCM connector M19 terminal 45 and ground. 45 - Ground: Continuity should not exist. 4. Check continuity between BCM connector M19 terminal 46 and main power window and door lock/unlock switch LH connector D7 terminal 11 or power window and door lock/unlock switch RH connector D105 terminal 2. 2 - 46: Continuity should exist. 11 - 46: Continuity should exist. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 5. Check continuity between BCM connector M19 terminal 46 and ground. 46 - Ground: Continuity should not exist. Is the inspection result normal?	GO TO 5	Repair or replace harness.
5	CHECK BCM OUTPUT VOLTAGE Connect BCM. Check voltage between BCM connector M19 terminals 45, 46 and ground. Courtesy of SUZUKI OF AMERICA CORP. 45 - Ground: Battery voltage 46 - Ground: Battery voltage Is the inspection result normal?	Check condition of the harness and connector.	Replace BCM. Refer to [BCM (BODY CONTROL MODULE): REMOVAL AND INSTALLATION ]