Diagnosis Procedure

DOOR SWITCH

KING CAB : Diagnosis Procedure

Regarding Wiring Diagram information, Wiring Diagram - King Cab.

1. CHECK DOOR SWITCHES INPUT SIGNAL

With CONSULT
Check door switches ("DOOR SW-DR", "DOOR SW-AS") in DATA MONITOR mode with CONSULT. Refer to
Door Lock.
- When doors are open:
DOOR SW-DR:ON
DOOR SW-AS:ON

- When doors are closed:
DOOR SW-DR:OFF
DOOR SW-AS:OFF

Without CONSULT
Check voltage between BCM connector M18 or M19 terminals 12, 47 and ground.










Is the inspection result normal?
YES- Door switch circuit is OK.
NO- GO TO 2

2. CHECK DOOR SWITCH CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect door switch and BCM.
3.Check continuity between door switch connector B8 (Front LH), B108 (Front RH) terminal 2, B73 (Rear upper LH), B156 (Rear upper RH), B74 (Rear lower LH), B157 (Rear lower RH) terminal 1 and BCM connector M18, M19 terminals 12, and 47.





2 - 47:Continuity should exist
2 - 12:Continuity should exist
1 - 47:Continuity should exist
1 - 12:Continuity should exist

4.Check continuity between door switch connector B8 (Front LH), B108 (Front RH) terminal 2, B73 (Rear upper LH), B156 (Rear upper RH), B74 (Rear lower LH), B157 (Rear lower RH) terminal
1 and ground.
2 - Ground:Continuity should not exist
1 - Ground:Continuity should not exist

Is the inspection result normal?
YES- GO TO 3
NO- Repair or replace harness.

3. CHECK DOOR SWITCHES

Check continuity between door switch terminals.










Is the inspection result normal?
YES- Repair or replace harness.
NO- Replace door switch.