Door & Lock

KEY CYLINDER SWITCH:_:BACK DOOR





Description
The main power window and door lock/unlock switch detects condition of the door key cylinder switch and transmits to BCM as the LOCK or UNLOCK signal.




Component Function Check
1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
Check "KEY CYL LK-SW" AND "KEY CYL UN-SW" in DATA MONITOR mode for "POWER DOOR LOCK
SYSTEM" with CONSULT-III.





Is the inspection result normal?
YES - Key cylinder switch is OK.
NO - SEE Diagnosis Procedure.




Diagnosis Procedure
Regarding Wiring Diagram information, [1][2]Electrical Diagrams.
1.CHECK BACK DOOR KEY CYLINDER SWITCH
With CONSULT-III
Check back door key cylinder switch ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in DATA MONITOR mode in CONSULT-III. CONSULT-III Function.
- When key inserted in back door key cylinder is turned to LOCK:






- When key inserted in back door key cylinder is turned to UNLOCK:






Without CONSULT-III





Check voltage between BCM connector M18 terminals 7, 8 and ground.





Is the inspection result normal?
YES - Back door key cylinder switch signal is OK.
NO - GO TO 2
2.CHECK BACK DOOR KEY CYLINDER SWITCH
1. Turn ignition switch OFF.
2. Disconnect back door key cylinder switch.





3. Check continuity between back door key cylinder switch terminals 1, 2 and 3.





Is the inspection result normal?
YES - GO TO 3
NO - Replace back door key cylinder switch.
3.CHECK BACK DOOR KEY CYLINDER SWITCH HARNESS
1. Disconnect BCM.





2. Check continuity between BCM connector M18 terminals 7, 8
1. and back door key cylinder switch connector D505 terminals 3,






3. Check continuity between BCM connector M18 terminals 7, 8 and ground.






Is the inspection result normal?
YES - GO TO 4
NO - Repair or replace harness.
4.CHECK BACK DOOR KEY CYLINDER SWITCH GROUND





Check continuity between back door key cylinder switch connector
D505 terminal 2 and ground.






Is the inspection result normal?
YES - GO TO 5
NO - Repair or replace harness.
5.CHECK BCM OUTPUT VOLTAGE
1. Connect BCM.





2. Check voltage between BCM connector M18 terminals 7, 8 and ground.






Is the inspection result normal?
YES - Check condition of the harness and connector.
NO - Replace BCM. Service and Repair.