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
CONSULT Function.
- When any doors are open:
DOOR SW-DR:ON
DOOR SW-AS:ON

- When any 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 BCM OUTPUT VOLTAGE

1.Turn ignition switch OFF.
2.Disconnect door switches.





3.Check voltage between BCM connector M18, M19 terminals 12, 47 and ground.
12 - Ground: Battery voltage
47 - Ground: Battery voltage

Is the inspection result normal?
YES- GO TO 3
NO- Replace BCM. Service and Repair.

3. CHECK DOOR SWITCH CIRCUIT

1.Disconnect BCM.
2.Check continuity between door switch connector D213 (Front LH), D314 (Front RH) terminal 2, D211
(Rear upper LH), D312 (Rear upper RH), D212 (Rear lower LH), D313 (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

3.Check continuity between door switch connector D213 (Front
LH), D314 (Front RH) terminal 2, D211 (Rear upper LH), D312
(Rear upper RH), D212 (Rear lower LH), D313 (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 4
NO- Repair or replace harness.

4. CHECK DOOR SWITCHES GROUND CIRCUIT

Check continuity between door switch connector D213 (Front LH), D314 (Front RH) terminal 3, D211 (Rear upper LH), D312 (Rear upper RH), D212 (Rear lower LH), D313 (Rear lower RH) terminal 2 and ground.





3 - Ground: Continuity should not exist
2 - Ground: Continuity should not exist

Is the inspection result normal?
YES- GO TO 5
NO- Repair or replace harness.

5. CHECK DOOR SWITCHES

Check continuity between door switch terminals.










Is the inspection result normal?
YES- Check condition of harness and connector.
NO- Replace door switch.