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
Select "DATA MONITOR" for "METER/M&A" and check the "BUCKLE SW" monitor value.
BUCKLE SW
When seat belt is fastened: OFF
When seat belt is unfastened: ON
YES- Inspection End.
NO- Refer to "Diagnosis Procedure".
Diagnosis Procedure
Regarding Wiring Diagram information, Warning Chime System Coupe or Warning Chime System Sedan.
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.
WCS
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.
3.Check continuity between the seat belt buckle switch LH terminals 1 and 2.
1- 2
When seat belt is fastened: Continuity should not exist.
When seat belt is unfastened: Continuity should exist.
Is the inspection result normal?
YES- Inspection End.
NO- Replace the seat belt buckle switch LH.