Seat Belt Buckle Switch Signal Circuit Check

Seat Belt Buckle Switch Signal Circuit Check

Description

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

Component Function Check

1. CHECK COMBINATION METER INPUT SIGNAL

Select "Data list" for "METER/M&A" and check the "SEAT BELT W/L" monitor value.






Is the inspection result normal?
YES
Inspection End.
NO
Refer to "Diagnosis Procedure".

Diagnosis Procedure

Regarding Wiring Diagram information, refer to [Warning Chime System: Wiring Diagram] [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.






Is the inspection result normal?
YES
Replace combination meter. Refer to [Combination Meter: Removal and Installation] 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.






4 Check continuity between combination meter harness connector M24 terminal 24 and ground.






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.






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.