Seat Belt Warning Lamp System

SEAT BELT BUCKLE SWITCH (DRIVER SIDE):_:SEAT BELT WARNING LAMP SYSTEM





Description
- Performs the control of tension reducer according to the seat belt buckle switch ON/OFF.
- Detects whether or not the seat belt is fastened when the ignition switch turns ON. If the seat belt is not fastened, illuminates the seat belt warning lamp on the combination meter.
- The seat belt buckle switch is installed in the seat belt buckle.




Component Function Check
1.CHECK SEAT BELT BUCKLE SWITCH
With CONSULT-III
When checking "BUCKLE SW" on DATA MONITOR of METER/M&A, check that ON/OFF display changes synchronized with the insertion operation to the seat belt buckle.





Is the inspection result normal?
YES - Seat belt buckle switch (driver side) circuit is normal.
NO - SEE Diagnosis Procedure.




Diagnosis Procedure
1.CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE) CIRCUIT
1. Turn the ignition switch ON.
2. Check that voltage between seat belt buckle switch (driver side) harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 2.
2.CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector and seat belt buckle switch (driver side) connector.
3. Check continuity between combination meter harness connector and seat belt buckle switch (driver side) harness connector.





4. Check continuity between combination meter harness connector and ground.





Is the inspection result normal?
YES - Repair or replace combination meter.
NO - Repair or replace harness between combination meter and seat belt buckle switch (driver side).
3.CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT
Check continuity between seat belt buckle switch (driver side) harness connector and ground.





Is the inspection result normal?
YES - GO TO 4.
NO - Repair or replace harness between seat belt buckle switch and ground.
4.CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
Check seat belt buckle switch (driver side). SEE Component Inspection (Belt Buckle Switch).
Is the inspection result normal?
YES - INSPECTION END
NO - Replace seat belt buckle switch (driver side).




Component Inspection (Belt Buckle Switch)
1.CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
1. Turn ignition switch OFF
2. Disconnect seat belt buckle switch connector.
3. Check continuity of seat belt buckle (driver side).





Is the inspection result normal?
YES - INSPECTION END
NO - Replace seat belt buckle switch (driver side).