| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJZ6 |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: SEAT BELT: SEAT BELT WARNING SYSTEM: Driver Side Seat Belt Warning Light does not Operate; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
Driver Side Seat Belt Warning Light does not Operate |
DESCRIPTION
When the ignition switch is ON, the center airbag sensor assembly transmits front seat inner belt status signals to the combination meter assembly through CAN. If the driver seat belt is not fastened, the combination meter assembly blinks the driver side seat belt warning light. If the seat belt is fastened, the warning light goes off.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
he seat belt warning system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting (See page
![2016 - 2020 MY Sienna [12/2015 - ]; SEAT BELT: SEAT BELT WARNING SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
).
PROCEDURE
|
1. |
CHECK DTC OUTPUT (AIRBAG SYSTEM) |
(a) Clear the DTCs (See page
).
(b) Check for DTCs (See page
).
Result
|
Result |
Proceed to |
|---|---|
|
DTCs are not output |
A |
|
DTCs are output |
B |
| B |
|
|
|
2. |
READ VALUE USING TECHSTREAM (LEFT SIDE BUCKLE SW) |
(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
|
Tester Display |
Measurement Item/Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|
|
Left side Buckle SW |
Driver side seat belt buckle switch/Unset, Set or NG |
Unset: Driver side seat belt unfastened Set: Driver side seat belt fastened NG: Data not determined |
- |
Result
|
Result |
Proceed to |
|---|---|
|
Unset or Set is displayed on the Techstream according to the driver seat belt condition |
A |
|
Unset or Set is not displayed correctly on the Techstream according to the driver seat belt condition |
B |
|
NG is displayed on the Techstream |
C |
| B |
|
| C |
|
|
|
3. |
REPLACE MAIN BODY ECU |
(a) Temporarily replace the main body ECU with a new or known good one (See page
).
|
|
4. |
CHECK SEAT BELT WARNING LIGHT |
(a) Check the operation of the seat belt warning light (See page
).
OK:
The seat belt warning light operates normally.
| OK |
|
END (MAIN BODY ECU WAS DEFECTIVE) |
| NG |
|
|
|