Seat Belt Buckle Switch Signal Circuit

SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT

Description

Transmits a seat belt buckle switch signal to the combination meter.


Component Function Check


1. CHECK COMBINATION METER INPUT SIGNAL

Select "DATA MONITOR" for "METER/M&A" and check the "SEAT BELT W/L" monitor value.
SEAT BELT W/L
When seat belt is fastened: OFF
When seat belt is unfastened: ON
Is the inspection result normal?
YES- Inspection End.
NO- .


Diagnosis Procedure

Regarding Wiring Diagram information, [1][2]Audible Warning Device.

1. CHECK COMBINATION METER INPUT SIGNAL

1.Turn ignition switch ON.
2.Check voltage between combination meter harness connector M24 terminal 24 and ground.
24 - Ground
When driver seat belt is fastened: Approx. 12V
When driver seat belt is unfastened: Approx. 0V
Is the inspection result normal?
YES- Replace combination meter. Service and Repair.
NO- GO TO 2

2. CHECK SEAT BELT BUCKLE SWITCH CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect combination meter connector and seat belt buckle switch LH connector.
3.Check continuity between combination meter harness connector M24 terminal 24 and seat belt buckle switch LH harness connector B12 terminal 1.
24 - 1: Continuity should exist.
4.Check continuity between combination meter harness connector M24 terminal 24 and ground.
24 - Ground: Continuity should not exist.
Is the inspection result normal?
YES- GO TO 3
NO- Repair or replace harness.

3. CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT

Check continuity between seat belt buckle switch LH harness connector B12 terminal 2 and ground.
2 - Ground: Continuity should exist.
Is the inspection result normal?
YES- Inspection End.
NO- Repair or replace harness.


Component Inspection


1. CHECK SEAT BELT BUCKLE SWITCH

1.Turn ignition switch OFF.
2.Disconnect the seat belt buckle switch LH connector.
3.Check continuity between the seat belt buckle switch LH terminals 1 and 2.





Is the inspection result normal?
YES- Inspection End.
NO- Replace the seat belt buckle switch LH.