Driver Side Seat Belt Warning Light does not Operate (TO 12/2010): Procedure

1. Check for DTCs.

   Result

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

B → GO TO  MULTIPLEX COMMUNICATION SYSTEM 

A: Go to next step 

1. Connect Techstream to the DLC3.
2. Ignition switch on (IG).
3. Turn the tester on.
4. Enter following menus: Body Electrical / Combination Meter / Active Test.
5. Check the operation by referring to the table below.
   COMBINATION METER:
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Driver Side Seat Belt	Driver Side Seat Belt	OFF or ON	Confirm that the vehicle is stopped, engine idling

   OK

   Indicator light (ON or OFF) can be switched ACTIVE TEST.

NG → REPLACE COMBINATION METER ASSEMBLY 

OK: Go to next step 

1. Remove the front seat inner belt assembly (Driver Side).
   Fig 1: Identifying Front Seat Inner Belt Assembly LH (Driver Side) Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   6 - 3	Seat belt is fastened	Approx. 330 Ω
   6 - 3	seat belt is unfastened	Approx. 1,330 Ω

NG → REPLACE FRONT SEAT INNER BELT ASSEMBLY LH (DRIVER SIDE) 

OK: Go to next step 

1. Disconnect the D8 and K2 connectors.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K2-3 - Body ground	Always	Below 1 Ω
   K2-3 - D8-9 (DBKL)	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE BODY ECU