Diagnosis Procedure

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.

KEY CYLINDER SWITCH

BACK DOOR : Diagnosis Procedure

Regarding Wiring Diagram information, 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 (BCM - Door Lock).
- When key inserted in back door key cylinder is turned to LOCK:

KEY CYL LK-SW : ON

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

KEY CYL UN-SW : ON

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.

2 - Ground : Continuity should exist.

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.