Security Control System

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 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 UN-SW, KEY CYL UN-SW in "DATA MONITOR" mode for "POWER DOOR LOCK SYSTEM" with CONSULT-III. Door Lock.





Is the inspection result normal?
YES - Key cylinder switch is OK.
NO - With LH and RH anti-pinch, Coupe.
NO - With LH anti-pinch only, Coupe.




Diagnosis Procedure (With LH and RH Anti-Pinch)
Regarding Wiring Diagram information, Vehicle Security System Coupe.
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. LH & RH Front Anti-Pinch Coupe.
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 door lock assembly LH (key cylinder switch) connector.
3. Check continuity between main power window and door lock/unlock switch connector and door lock assembly LH (key cylinder switch) connector.





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 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. Coupe.
Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Replace door lock assembly LH (key cylinder switch). Removal And Installation Coupe.




Diagnosis Procedure (With LH Anti-Pinch Only)
Regarding Wiring Diagram information, Coupe Coupe.
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 Anti-Pinch Coupe.
NO - GO TO 2
2.CHECK DOOR KEY CYLINDER SWITCH GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect door lock assembly LH (key cylinder switch) connector.





3. Check continuity between 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 door lock assembly LH (key cylinder switch) connector D25 terminals 5, 6 and BCM connector M18 (B) terminals 34, 56.





3. Check continuity between door lock assembly LH (key cylinder switch) connector D10 (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. Coupe.
Is the inspection result normal?
YES - Check intermittent incident. Intermittent Incident.
NO - Replace door lock assembly LH (key cylinder switch). Removal And Installation Coupe.




Component Inspection

COMPONENT INSPECTION
1.CHECK DOOR KEY CYLINDER SWITCH





Check door lock assembly LH (key cylinder switch).





Is the inspection result normal?
YES - Key cylinder switch is OK.
NO - Replace door lock assembly LH (key cylinder switch). Removal And Installation Coupe.