Seat Belt Warning Lamp Circuit

SEAT BELT WARNING LAMP CIRCUIT





Component Function Check
1.CHECK SEAT BELT WARNING LAMP FUNCTION-I
1. Turn ignition switch ON.
2. Check seat belt warning lamp function.





Is the inspection results normal?
YES - GO TO 2.
NO - Check combination meter circuit. Work Flow.
2.CHECK SEAT BELT WARNING LAMP FUNCTION-II
1. Sits in the passenger seat.
2. Fasten the seat belt (passenger side).
3. Check seat belt warning lamp function.





Is the inspection results normal?
YES - Seat belt warning lamp circuit is normal.
NO - Check seat belt warning lamp circuit. SEE Diagnosis Procedure.




Diagnosis Procedure

WARNING:
- Before servicing, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3 minutes. (To discharge backup capacitor.)
- Never use unspecified tester or other measuring device.
1.CHECK SEAT BELT ASSEMBLY (PASSENGER SIDE) CIRCUIT-I
1. Turn ignition switch OFF.
2. Disconnect air bag diagnosis sensor unit harness connector and seat belt assembly (passenger side) harness connector.
3. Check continuity between air bag diagnosis sensor unit harness connector and seat belt assembly (passenger side) harness connector.





4. Check continuity between air bag diagnosis sensor unit harness connector and ground.





Is the inspection result normal?
YES - GO TO 2.
NO - Replace harness or connector.
2.CHECK SEAT BELT ASSEMBLY (PASSENGER SIDE) CIRCUIT-II
Check continuity between seat belt assembly (passenger side) harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair or replace harness or connector.
3.CHECK SEAT BELT ASSEMBLY (PASSENGER SIDE)
Check seat belt assembly (passenger side). SEE Component Inspection [Seat Belt Assembly (Passenger Side)].
Is the inspection result normal?
YES - GO TO 4.
NO - Replace seat belt assembly (passenger side). Removal And Installation.
4.CHECK SEAT BELT WARNING LAMP CIRCUIT
1. Disconnect combination meter harness connector.
2. Check continuity between air bag diagnosis sensor unit harness connector and combination meter harness connector.





3. Check continuity between seat belt warning unit and ground.





Is the inspection results normal?
YES - GO TO 5.
NO - Replace harness or connector.
5.CHECK COMBINATION METER POWER SUPPLY AND GROUND CIRCUIT
Check combination meter power supply and ground circuit. Power Supply And Ground Circuit.
Is the inspection result normal?
YES - GO TO 6.
NO - Repair or replace harness or connector.
6.REPLACE COMBINATION METER
Replace combination meter. Removal And Installation.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace air bag diagnosis sensor unit. Removal And Installation.




Component Inspection [Seat Belt Assembly (Passenger Side)]
1.CHECK SEAT BELT ASSEMBLY (PASSENGER SIDE)
1. Turn ignition switch OFF.
2. Disconnect seat belt assembly (passenger side) harness connector.
3. Check continuity between seat belt assembly (passenger side) terminals.





Is the inspection result normal?
YES - INSPECTION END
NO - Replace seat belt assembly (passenger side). Removal And Installation.