Inspection Procedure

HINT:

If there is an open in the ground circuit (Airbag sensor assy center), the airbag sensor assy center outputs DTCs. Perform troubleshooting with the "Supplemental Restraint System 05-1153".

1. PERFORM ACTIVE TEST BY HAND-HELD TESTER 
   1. Operate the hand-held tester according to the steps on the display and select the "ACTIVE TEST".

      METER:

      D-BELT REMIND ACTIVE TEST DETAILS
      
      

      Item	Test Details	Diagnostic Note
      D-BELT REMIND	Indicate. Lamp D-SEAT BELT (OFF/ON)	Confirm that the vehicle is stopped and engine idling

      1. NG: REPLACE COMBINATION METER ASSY (See  OVERHAUL  ) 
      2. OK: GO TO NEXT STEP. 
2. READ VALUE OF HAND-HELD TESTER (DRIVER SEAT BELT) 
   1. Operate the hand-held tester according to the steps on the display and select the "DATA LIST".

      SRS AIRBAG:

      Fig 1: Identifying Item Measurement And Condition Table

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. NG: Go to step 3 
      2. OK: REPLACE COMBINATION METER ASSY (See  OVERHAUL  ) 
3. INSPECT FRONT SEAT INNER BELT ASSY (DRIVER SIDE)" 
   1. Disconnect the connector from the front seat inner belt assy (Driver Side).
   2. Measure the resistance according to the value (s) in the table below.

      Standard:

      TERMINALS SPECIFIED CONDITION
      
      

      Terminal No	Condition	Specified condition
      B4-2 - B4-5	Seat belt is fastened	Approx. 330 Ω
      B4-2 - B4-5	Seat belt is unfastened	Approx. 1,330 Ω

      1. NG: REPLACE FRONT SEAT INNER BELT ASSY (DRIVER SIDE) 
         Fig 2: Inspecting Front Seat Inner Belt Assy (Driver Side)

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. OK: GO TO NEXT STEP. 
4. CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSY - BODY GROUND) (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  ) 
   1. Disconnect the connector from the front seat inner belt assy (Driver Side).
   2. Measure the resistance according to the value (s) in the table below.

      Standard:

      Specified Condition Table
      
      

      Tester Connection	Condition	Specified Condition
      B4-5 - Body ground	Always	Below 1 Ω

      1. NG: Go to step 5 
         Fig 3: Checking Harness And Connector (Front Seat Inner Belt Assy - Body Ground)

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. OK: END 
5. CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSY - AIRBAG SENSOR ASSY CENTER) (SEE  HOW TO PROCEED WITH TROUBLESHOOTING  0) 
   1. Disconnect the B4, A23 connectors.
   2. Measure the resistance according to the value (s) in the table below.

      Standard:

      TERMINALS SPECIFIED CONDITION
      
      

      Tester Connection	Condition	Specified Condition
      B4-2 - A23-10	Always	Below 1 Ω
      A23-10 - Body ground	Always	10 kΩ or higher

      1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
         Fig 4: Checking Harness And Connector (Front Seat Inner Belt Assy - Airbag Sensor Assy Center)

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. OK:END