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DOOR LOCK AND UNLOCK SWITCH DLK-33 < DTC/CIRCUIT DIAGNOSIS > C D E F G H I J L M A B DLK N O P CREW CAB : Diagnosis Procedure INFOID:0000000009878774 Regarding Wiring Diagram information, refer to DLK-84, "Wiring Diagram - Crew Cab" . 1. CHECK DOOR LOCK/UNLOCK SWITCH INPUT SIGNAL With CONSULT Check door lock/unlock switch ("CDL LOCK SW", "CDL UNLOCK SW") in DATA MONITOR mode in CON- SULT. Refer to DLK-19, "DOOR LOCK : CONSULT Function (BCM - DOOR LOCK)" . • When door lock/unlock switch is turned to LOCK: • When door lock/unlock switch is turned to UNLOCK: Without CONSULT 1. Remove key from ignition key cylinder. 2. Check the signal between BCM connector M18 terminal 22 and ground with oscilloscope when door lock/ unlock switch is turned to LOCK or UNLOCK. 3. Make sure the signals which are shown in the figure below can be detected during 10 seconds just after the door lock/unlock switch is turned to LOCK or UNLOCK. Is the inspection result normal? YES >> Door lock and unlock switch circuit is OK. NO >> GO TO 2 2. CHECK BCM OUTPUT SIGNAL 1. Turn ignition switch OFF. 2. Using the vehicle operational key fob, press and hold the UNLOCK button for more than 3 seconds. Is the inspection result normal? YES >> GO TO 3 NO >> Replace BCM. Refer to BCS-52, "Removal and Installation" 3. CHECK DOOR LOCK/UNLOCK SWITCH GROUND HARNESS 1. Turn ignition switch OFF. 2. Disconnect main power window and door lock/unlock switch or power window and door lock/unlock switch RH. CDL LOCK SW :ON CDL UNLOCK SW :ON Connector Terminals Signal (Reference value) (+) (–) M18 22 Ground PIIA6379E PIIA1297E The front windows should be lowered? |