Diagnosis Procedure

KEY CYLINDER SWITCH

BACK DOOR : Diagnosis Procedure

Regarding Wiring Diagram information, [1][2]Electrical Diagrams.

1. CHECK BACK DOOR KEY CYLINDER SWITCH

With CONSULT
Check back door key cylinder switch ("KEY CYL LK-SW") and ("KEY CYL UN-SW) in DATA MONITOR mode in CONSULT. CONSULT Function.
- 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





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
and back door key cylinder switch connector D505 terminals 3, 1.
7 - 3: Continuity should exist.
8 - 1: Continuity should exist.
3.Check continuity between BCM connector M18 terminals 7, 8
and ground.
7 - Ground: Continuity should not exist.
8 - Ground: Continuity should not exist.
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.
7 - Ground: Approx. 5V
8 - Ground: Approx. 5V
Is the inspection result normal?
YES- Check condition of the harness and connector.
NO- Replace BCM. Service and Repair.