Seat Belt Warning System Does Not Function

Turn ignition switch ON.

Does the seat belt warning lamp come ON?

YES

GO TO 2.

NO

• Check 5A fuse [No. 47, located in the fuse block (J/B)].
• Check seat belt buckle switch (driver seat).
• Check harness between combination meter and seat belt buckle switch (driver seat).
• Check combination meter. Refer to Fail-Safe (with Type A Meter) or Fail-Safe (with Type B Meter).

Fasten the seat belt buckle (LH).

Does the seat belt warning lamp go OFF?

YES

GO TO 3.

NO

• Check front seat belt buckle switch (LH).
• Check harness between combination meter and front seat belt buckle switch (LH).

Have a helper sit in the passenger seat.

Does the seat belt warning lamp go ON?

YES

GO TO 4.

NO

• Check occupant classification system. Refer to System Description .
• Check harness between occupant classification system control unit and air bag diagnosis sensor unit.

Fasten the seat belt buckle (RH).

Does the seat belt warning lamp go OFF?

YES

System OK.

NO

• Check front seat belt buckle switch (RH).
• Check harness between front seat belt buckle switch (RH) and air bag diagnosis sensor unit.
• Replace air bag diagnosis sensor unit. Refer to Removal and Installation .