Key Cylinder Switch

KEY CYLINDER SWITCH





Description
For vehicles equipped with LH and RH anti-pinch system, 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.
For vehicles equipped with LH anti-pinch system only, the front door lock assembly LH (key cylinder switch) transmits the LOCK or UNLOCK signal directly to the BCM.




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. Work Flow.





Is the inspection result normal?
YES - Key cylinder switch is OK.
NO - With LH and RH anti-pinch, SEE Diagnosis Procedure (With LH and RH Anti-Pinch).
NO - With LH anti-pinch only, SEE Diagnosis Procedure (With LH Anti-Pinch Only).




Diagnosis Procedure (With LH and RH Anti-Pinch)
Regarding Wiring Diagram information, [1][2]Electrical Diagrams.
1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
1. Turn ignition switch ON.





2. Check voltage between main power window and door lock/unlock switch connector and ground.





Is the inspection result normal?
YES - Replace main power window and door lock/unlock switch. Front Door Lock.
NO - GO TO 2
2.CHECK DOOR KEY CYLINDER SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch connector and front door lock assembly LH
(key cylinder switch) connector.





3. Check continuity between main power window and door lock/unlock switch connector (A) and front door lock assembly LH
(key cylinder switch) connector (B).





4. Check continuity between main power window and door lock/
unlock switch connector and ground.





Is the inspection result normal?
YES - GO TO 3
NO - Repair or replace harness.
3.CHECK DOOR KEY CYLINDER SWITCH GROUND CIRCUIT





Check continuity between front door lock assembly LH connector and ground.





Is the inspection result normal?
YES - GO TO 4
NO - Repair or replace harness.
4.CHECK DOOR KEY CYLINDER SWITCH
Check door key cylinder switch. SEE Component Inspection.
Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Replace front door lock assembly LH (key cylinder switch). Front Door Lock.




Diagnosis Procedure (With LH Anti-Pinch Only)
Regarding Wiring Diagram information, [1][2]Electrical Diagrams.
1.CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
1. Turn ignition switch ON.





2. Check voltage between BCM connector and ground.





Is the inspection result normal?
YES - Replace main power window and door lock/unlock switch. LH Only Window Anti-Pinch.
NO - GO TO 2
2.CHECK DOOR KEY CYLINDER SWITCH GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front door lock assembly LH (key cylinder switch) connector.





3. Check continuity between front door lock assembly LH (key cylinder switch) connector and ground.





Is the inspection result normal?
YES - GO TO 3
NO - Repair or replace harness.
3.CHECK DOOR KEY CYLINDER SIGNAL CIRCUIT
1. Disconnect BCM connector M18.





2. Check continuity between front door lock assembly LH (key cylinder switch) connector D14 (A) terminals 5, 6 and BCM connector M18 (B) terminals 34, 56.





3. Check continuity between front door lock assembly LH (key cylinder switch) connector D14 (A) terminals 5, 6 and ground.





Is the inspection result normal?
YES - GO TO 4
NO - Repair or replace harness.
4.CHECK DOOR KEY CYLINDER SWITCH
Check door key cylinder switch. SEE Component Inspection.
Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Replace front door lock assembly LH (key cylinder switch). Front Door Lock.




Component Inspection

COMPONENT INSPECTION
1.CHECK DOOR KEY CYLINDER SWITCH





Check front door lock assembly LH (key cylinder switch).





Is the inspection result normal?
YES - Key cylinder switch is OK.
NO - Replace front door lock assembly LH (key cylinder switch). Front Door Lock.