Check Seat Belt Buckle Switch (Passenger Side) Circuit

PRE-CRASH SEAT BELT


Check Seat Belt Buckle Switch (Passenger Side) Circuit

1.CHECK PRE-CRASH SEAT BELT CONTROL UNIT INPUT SIGNAL
With CONSULT-III
Select "SB SW RH SIG" on DATA MONITOR screen, and then make sure that ON/OFF display changes synchronized with the insertion operation to the seat belt buckle.

SB SW RH SIG
When passenger seat belt is not fastened :OFF
When passenger seat belt is fastened :ON

Without CONSULT-III
1. Turn ignition switch ON.





2. Check voltage between seat belt buckle switch (passenger side) harness connector and ground.





OK or NG
OK - Seat belt buckle switch (passenger side) circuit is OK.
NG - GO TO 2.
2.CHECK SEAT BELT BUCKLE SWITCH (PASSENGER SIDE) HARNESS
1. Turn ignition switch OFF.
2. Disconnect pre-crash seat belt control unit and seat belt buckle switch (passenger side) connector.





3. Check continuity between pre-crash seat belt control unit harness connector and seat belt buckle switch (passenger side) harness connector.





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





OK or NG
OK - GO TO 3.
NG - Repair or replace harness.
3.CHECK RH SEAT BELT SWITCH





Check continuity between seat belt buckle switch (passenger side) while performing the insertion operation to the seat belt buckle.





OK or NG
OK - GO TO 4.
NG - Replace seat belt buckle (passenger side).
4.CHECK RH SEAT BELT SWITCH GROUND CIRCUIT HARNESS





Check continuity between seat belt buckle switch (passenger side) harness connector and ground.





OK or NG
OK - Check harness connection.
- If it is OK, replace pre-crash seat belt control unit.
- If it is NG, repair or replace malfunction part.
NG - Repair or replace harness.