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 10A fuse [No. 8, 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 ".

Fasten the seat belt buckle (driver seat).

Does the seat belt warning lamp go OFF? 

YES: GO TO 3.

NO:

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

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 "OCCUPANT CLASSIFICATION SYSTEM: SYSTEM DESCRIPTION ".
• Check harness between occupant classification control unit and air bag diagnosis sensor unit.

Fasten the seat belt buckle (passenger seat).

Does the seat belt warning lamp go OFF? 

YES: System OK.

NO:

• Check seat belt buckle switch (passenger seat).
• Check harness between seat belt buckle switch (passenger seat) and air bag diagnosis sensor unit.
• Replace air bag diagnosis sensor unit. Refer to "REMOVAL AND INSTALLATION ".