Diagnosis Procedure

DOOR SWITCH

CREW CAB : Diagnosis Procedure

Regarding Wiring Diagram information, Wiring Diagram - Crew Cab.

1. CHECK DOOR SWITCHES INPUT SIGNAL

With CONSULT
Check door switches ("DOOR SW-DR", "DOOR SW-AS", "DOOR SW-RL", "DOOR SW-RR") in DATA MONITOR mode with CONSULT. CONSULT Function.
- When any doors are open:
DOOR SW-DR: ON
DOOR SW-AS: ON
DOOR SW-RL: ON
DOOR SW-RR: ON

- When any doors are closed:
DOOR SW-DR: OFF
DOOR SW-AS: OFF
DOOR SW-RL: OFF
DOOR SW-RR: OFF

Without CONSULT
Check voltage between BCM connector M18 or M19 terminals 12, 13, 47, 48 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, 13, 47, 48 and ground.
12 - Ground: Battery voltage
13 - Ground: Battery voltage
47 - Ground: Battery voltage
48 - 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 door switch and BCM.
2.Check continuity between door switch connector B8 (Front LH), B108 (Front RH), B18 (Rear LH), B116
(Rear RH) terminal 2 and BCM connector M18, M19 terminals 12, 13, 47 and 48.





2 - 47: Continuity should exist.
2 - 12: Continuity should exist.
2 - 48: Continuity should exist.
2 - 13: Continuity should exist.

3.Check continuity between door switch connector B8 (Front LH), B108 (Front RH), B18 (Rear LH), B116 (Rear RH) terminal 2 and ground.
2 - Ground: Continuity should not exist.

Is the inspection result normal?
YES- GO TO 4
NO- Repair or replace harness.

4. CHECK DOOR SWITCHES

1.Disconnect door switch.
2.Check continuity between door switch terminals.










Is the inspection result normal?
YES- Check switch case ground condition.
NO- Replace door switch.