Driver Side Seat Belt Warning Light does not Operate [04/2014 - 08/2017]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Main Body / Data List.
5. Read the Data List according to the display on the Techstream.

   Body Electrical > Main Body > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   D Seat Buckle SW	Driver seat belt buckle switch	ON or OFF	ON: Driver seat belt fastened OFF: Driver seat belt unfastened	-

   Body Electrical > Main Body > Data List 

   Tester Display
   D Seat Buckle SW

   OK

   The Techstream display changes correctly in response to the driver seat belt condition.

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [08/2013 - 08/2016]  Refer to  REMOVAL [08/2016 - ] 

Result:  2

NG 

See step  2

1. Remove the front seat inner belt assembly LH.

   Refer to REMOVAL [04/2014 - 08/2014] Refer to REMOVAL [08/2014 - 08/2016] Refer to REMOVAL [08/2016 - 08/2017]

2. Inspect the front seat inner belt assembly LH.

   Refer to INSPECTION [04/2014 - 08/2016] Refer to INSPECTION [08/2016 - 08/2017]

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE FRONT SEAT INNER BELT ASSEMBLY LH. Refer to  REMOVAL [04/2014 - 08/2014]  Refer to  REMOVAL [08/2014 - 08/2016]  Refer to  REMOVAL [08/2016 - 08/2017] 

Result:  1

OK 

See step  3

1. Remove the main body ECU (multiplex network body ECU).

   Refer to REMOVAL [08/2013 - ]

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component without harness connected (Driver Side Junction Block Assembly)

   -

   -

2. Disconnect the 3E driver side junction block assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   MB-18 (DBKL) - 3E-25	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY. Refer to  REMOVAL [08/2013 - ] 

Result:  1

OK 

See step  4

1. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3E-25 - L54-3 (+)	Always	Below 1 Ω
   3E-25 - Body ground	Always	10 kΩ or higher
   L54-3 (+) - Body ground	Always	10 kΩ or higher
   L54-2 (E) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [08/2013 - ] 

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR