Driver Side Seat Belt Warning Light does not Operate [01/2019 - 09/2022]: Procedure

WARNING: This page is about a different car, the 2022 Toyota Corolla, 2021 Toyota Corolla, and 2020 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC OUTPUT (AIRBAG SYSTEM)

Clear the DTCs.
Body Electrical > SRS Airbag > Clear DTCs

Check for DTCs.

Body Electrical > SRS Airbag > Trouble Codes

Result

Result	Proceed to
DTCs are not output	A
DTCs are output	B

Result:

GO TO AIRBAG SYSTEM. Refer to DIAGNOSTIC TROUBLE CODE CHART [01/2019 - 04/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [04/2020 - 06/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [06/2021 - 09/2022]

Result:

See step 2

READ VALUE USING TECHSTREAM

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Enter the following menus: Body Electrical / SRS Airbag / Data List.

Read the Data List according to the display on the Techstream.

Body Electrical > SRS Airbag > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Left side Buckle SW	LH buckle switch	Unset, Set or NG	Unset: Seat belt not fastened Set: Seat belt fastened NG: Data is not determined	-

Body Electrical > SRS Airbag > Data List

Tester Display
Left side Buckle SW

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

Result:

USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

Result:

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to REMOVAL [01/2019 - 03/2019] , or refer to REMOVAL [03/2019 - 09/2022]

Result:

REPLACE AIR BAG SENSOR ASSEMBLY. Refer to REMOVAL [01/2019 - 03/2019] , or refer to REMOVAL [03/2019 - 09/2022]