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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 UN-SW, KEY CYL UN-SW in "DATA MONITOR" mode for "POWER DOOR LOCK SYSTEM" with CONSULT. With Intelligent Key.





Is the inspection result normal?
YES- Key cylinder switch is OK.
NO- (With LH Anti-Pinch Only) Sedan.


Diagnosis Procedure

Regarding Wiring Diagram information, 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. 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 "Component Inspection".
Is the inspection result normal?
YES- Check intermittent incident. Intermittent Incident.
NO- Replace front door lock assembly LH (key cylinder switch). With Intelligent Key.


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). With Intelligent Key.
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