DESCRIPTION The combination meter assembly illuminates, blinks or turns off the seat belt warning light on the combination meter assembly in accordance with the state of the front seat inner belt assembly LH. 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 DTCs (See page (b) Recheck for DTCs (See page
(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. SRS Airbag (Center Airbag Sensor Assembly)
(a) Replace the main body ECU (multiplex network body ECU) with a new one.
(a) Check the operation of the seat belt warning light (See page
OK: The seat belt warning light operates normally.
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Toyota Tundra Service Manual > Dynamic Radar Cruise Control System: Skid Control Buzzer Circuit (C1A4A)
DESCRIPTION Based on dynamic radar cruise control system operation, the forward recognition camera provides warnings to the driver by sounding the skid control buzzer assembly. DTC C1A4A is stored when a malfunction is detected in the skid control buzzer assembly circuit. DTC No. Detection Item DTC ...
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