Seat Belt Control System

SEAT BELT BUCKLE SWITCH

DRIVER SIDE : Diagnosis Procedure


1. CHECK PRE-CRASH SEAT BELT CONTROL UNIT INPUT SIGNAL

Check that voltage between seat belt buckle switch (driver side) and ground.





Is the inspection result normal?
YES- Seat belt buckle switch (driver side) circuit is normal.
NO- GO TO 2.

2. CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE) CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect pre-crash seat belt control unit connector and seat belt buckle switch (driver side) connector.
3.Check continuity between pre-crash seat belt control unit and seat belt buckle switch (driver side).





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





Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace harness between pre-crash seat belt control unit and seat belt buckle switch (driver side).

3. CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT

Check continuity between seat belt buckle switch (driver side) 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). Refer to "DRIVER SIDE : Component Inspection" Component Inspection.
Is the inspection result normal?
YES- Replace pre-crash seat belt control unit. Refer to "Removal and Installation" Removal and Installation.
NO- Replace seat belt buckle switch (driver side).