Seat Belt Warning Lamp System

SEAT BELT BUCKLE SWITCH (PASSENGER 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 switch 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 WARNING FUNCTION
1. Sit down to passenger seat.
2. Check that seat belt warning lamp turns OFF when passenger seat belt is fastened, and then turns ON when passenger seat belt is unfastened.
Is the inspection result normal?
YES - Seat belt buckle switch (passenger side) circuit is normal.
NO - SEE Diagnosis Procedure.




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





Is the inspection result normal?
YES - GO TO 3.
NO - GO TO 2.
2.CHECK SEAT BELT BUCKLE SWITCH (PASSENGER SIDE) CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect air bag diagnosis sensor unit connector and seat belt buckle switch (passenger side) connector.
3. Check continuity between air bag diagnosis sensor unit harness connector and seat belt buckle switch
(passenger side) harness connector.





4. Check continuity between pre-crash seat belt control unit (passenger side) harness connector and ground.





Is the inspection result normal?
YES - INSPECTION END
NO - Repair or replace harness between pre-crash seat belt control unit (passenger side) and seat belt buckle switch (passenger side).
3.CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT
Check continuity between seat belt buckle switch (passenger 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 (PASSENGER SIDE)
Check seat belt buckle switch (passenger side). SEE Component Inspection (Belt Buckle Switch).
Is the inspection result normal?
YES - INSPECTION END
NO - Replace seat belt buckle switch (passenger side).




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





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