Component Tests and General Diagnostics

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

1.Start engine.
2.Monitor seat belt warning lamp while fastening and unfastening the driver seat belt.
Seat belt warning lamp
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 35 and ground.
35 - 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. Removal And Installation.
NO- GO TO 2

2. CHECK SEAT BELT BUCKLE SWITCH CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect combination meter and seat belt buckle switch LH.
3.Check continuity between combination meter harness connector M24 terminal 35 and seat belt buckle switch LH harness connector B202 terminal 1.
35 - 1: Continuity should exist.
4.Check harness continuity between combination meter harness connector M24 terminal 35 and ground.
35 - 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 harness continuity between seat belt buckle switch LH harness connector B202 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 LH terminals 1 and 2.
1- 2
When seat belt is : Continuity should not exist.
fastened
When seat belt is : Continuity should exist.
unfastened

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