Toyota Sienna Service Manual: Driver Side Seat Belt Warning Light does not Operate

DESCRIPTION

When turning the ignition switch to the ON position, the combination meter assembly communicates with the supplemental restraint system by the multiplex communication system. Unless the driver side seat belt is fastened, the combination meter assembly will turn on the seat belt warning light for driver side. If the driver side seat belt is fastened, then the combination meter assembly will turn off the driver side seat belt warning light.

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK MULTIPLEX COMMUNICATION SYSTEM

1. Check if the MULTIPLEX communication DTC is output

Result

2 PERFORM ACTIVE TEST BY INTELLIGENT TESTER

1. Connect the intelligent tester to the DLC3.
2.  Turn the ignition switch to the ON position.
3.  Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / ACTIVE TEST.
4.  Check the operation by referring to the value(s) in the table below.

METER:

OK: Warning light condition (ON/OFF) can be switched by "ACTIVE TEST".

3 CHECK DTC

1. Check if DTC B0126 is output

Result

REPLACE CENTER AIR BAG SENSOR ASSEMBLY