Seat Belt Warning System: Inspection

1. Inspect the buckle switch.
   1. Fasten the seat belt (Buckle switch is ON).
   2. Check the resistance between the terminals.

      Standard: 

      TESTER CONDITION SPECIFICATION
      
      

      Tester Connection	Specified Condition
      A-3 - A-4	1 MΩ or higher
      A-4 - A-5	Below 1 Ω

      ^*  When the positive and negative poles between the terminals are exchanged, there is a resistance of Below 1 Ω in one way but a resistance of 1 MΩ or higher in the other way. 

      Fig 1: Identifying Seat Belt Connector "A"

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Release the seat belt (Buckle switch is OFF).
   4. Check the resistance between the terminals.

Standard: 

^*  When the positive and negative poles between the terminals are exchanged, there is a resistance of 1 MΩ or higher in either way. 

If the result is not as specified, replace the inner belt assy.

Fig 2: Identifying Seat Belt Connector "A"

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Inspect the buckle switch.
   1. Fasten the seat belt (Buckle switch is ON).
   2. Check the resistance between the terminals.

      Standard: 

      TESTER CONDITION SPECIFICATION
      
      

      Tester Connection	Specified Condition
      A-4 - A-5	1 MΩ or higher

      Fig 3: Identifying Seat Belt Connector "A"

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Release the seat belt (Buckle switch is OFF).
   4. Check the resistance between the terminals.

   Standard: 

   TESTER CONDITION SPECIFICATION
   
   

   Tester Connection	Specified Condition
   A-4 - A-5	Below 1 Ω

   If the result is not as specified, replace the inner belt assy.

   Fig 4: Identifying Seat Belt Connector "A"

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the circuit for the airbag seat position sensor.
   1. Check the resistance between the terminals.

   Standard: 

   TESTER CONDITION SPECIFICATION
   
   

   Tester Connection	Specified Condition
   1 - 2 (Connector for airbag seat position sensor)	Below 1 Ω

   If the result is not as specified, replace the inner belt assy.

   Fig 5: Identifying Airbag Seat Position Sensor Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002