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
- Check if the MULTIPLEX communication DTC is output
Result
2 PERFORM ACTIVE TEST BY INTELLIGENT TESTER
- Connect the intelligent tester to the DLC3.
- Turn the ignition switch to the ON position.
- Enter the following menus: DIAGNOSIS / OBD/MOBD / METER / ACTIVE TEST.
- 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
- Check if DTC B0126 is output
Result
REPLACE CENTER AIR BAG SENSOR ASSEMBLY
Engine Coolant Temperature Receiver Gauge Malfunction
DESCRIPTION
The meter CPU receives engine coolant temperature signals from the ECM via
the multiplex
communication lines. The meter CPU displays engine coolant temperature that is
calculated bas ...
Operating Light Control Rheostat does not Change Light Brightness
DESCRIPTION
The meter CPU receives signals for adjusting illumination on the meter from
this circuit. The meter CPU
detects the illumination level selected by the user according to the position of ...
Other materials:
Diagnosis system
1. CHECK DLC3
The vehicle's ECU uses ISO 15765-4 for
communication protocol. The terminal arrangement
of the DLC3 complies with SAE J1962 and matches
the ISO 15765-4 format.
NOTICE:
*: Before measuring the resistance, leave the
vehicle as is for at least 1 minute and do no ...
Installation
1. INSTALL TIRE PRESSURE WARNING VALVE AND TRANSMITTER
(a) Insert the tire pressure warning valve and
transmitter into the valve installation hole. Insert it
from the inside of the rim so that the printed surface
can be seen.
NOTICE:
Check that there is no visible deformation,
damage, ...
Terminals of ECU
1. CENTER AIRBAG SENSOR ASSEMBLY (w/ Side
Airbag)
2. CENTER AIRBAG SENSOR ASSEMBLY (w/o Side
Airbag)
...
