Toyota Tundra Service Manual: Front Passenger Side Seat Belt Warning Light Malfunction

DESCRIPTION

When the ignition switch to ON, the occupant detection ECU sends a signal to the center airbag sensor assembly to indicate the state of the front seat inner belt assembly RH and also whether the front passenger seat is occupied. The center airbag sensor assembly sends those signals to the combination meter assembly via CAN communication. The combination meter assembly illuminates, blinks or turns off the seat belt warning light on the combination meter assembly in accordance with these signals.

HINT:

The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The seat belt warning system uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure (See page ).

PROCEDURE

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

B

GO TO OCCUPANT CLASSIFICATION SYSTEM

A

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

B

GO TO AIRBAG SYSTEM

A

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Occupant Detection / Data List.

(e) Read the Data List according to the display on the Techstream (See page ).

B

REPLACE FRONT SEAT INNER BELT ASSEMBLY RH

C

REPLACE OCCUPANT DETECTION ECU

A

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / SRS Airbag / Data List.

(e) Read the Data List according to the display on the Techstream (See page ).

A

REPLACE COMBINATION METER ASSEMBLY

B

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

C

REPLACE CENTER AIRBAG SENSOR ASSEMBLY