Diagnosis Procedure

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.





KEY CYLINDER SWITCH


Diagnosis Procedure

Regarding Wiring Diagram information, refer to NVIS - With Remote Keyless Entry.
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. Refer to LH Only Anti-Pinch-Coupe.
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 and BCM connector M18.





3. Check continuity between front door lock assembly LH (key cylinder switch) 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. Refer to Sedan Without Intelligent Key.
Is the inspection result normal?
YES - Check intermittent incident. Refer to Intermittent Incident.
NO - Replace front door lock assembly LH (key cylinder switch). Refer to Sedan With Intelligent Key.