Power Shoulder Belt Anchorage System: Inspection

HINT:

When removing the anchor motor from the height adjustable anchor, fix the height adjustable anchor's Slider so that it does not move out of the position. Fix the slider until the motor is reinstalled.

1. Driver side: INSPECT HEIGHT ADJUSTABLE ANCHOR MOTOR 
   1. Disconnect the belt anchor adjuster.
   2. Apply battery voltage and check operation of the belt anchor adjuster.

      OK: 

      ANCHOR OPERATION SPECIFICATIONS
      
      

      Measurement Condition	Anchor operation
      Battery positive (+) --> Terminal 5 Battery negative (-) --> Terminal 3	Slider moves upward
      Battery positive (+) --> Terminal 3 Battery negative (-) --> Terminal 5	Slider moves downward

      If the result is not as specified, replace the motor.

      Fig 1: Inspecting Belt Anchor Adjuster Operation (Driver Side)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Check the PTC operation inside the regulator motor.
      NOTE: Perform this procedure with the shoulder belt anchor adjuster installed in the vehicle.
      1. Disconnect the passenger side shoulder belt anchor adjuster.
      2. Connect the ammeter's positive (+) lead to terminal 5 of the wire harness side connector and the negative (-) lead to the battery's negative terminal.
      3. Connect the battery's positive (+) lead to terminal 5 and negative (-) lead to terminal 3, and slide the anchor to the upward position.
      4. Continue to apply voltage, and check that the current changes to less than 1 A within 6 to 46 seconds.
      5. Disconnect the leads from the terminals.
      6. Approximately 60 seconds later, connect the battery's positive (+) lead to terminal 3 and the negative (-) lead to terminal 5, and check that the shoulder belt anchor adjuster slides to the downward position.

      If the result is not as specified, replace the motor assy.

      Fig 2: Checking PTC Operation Inside Regulator Motor (1 Of 2) (Driver Side)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fig 3: Checking PTC Operation Inside Regulator Motor (2 Of 2) (Driver Side)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Check the pulse of the pulse sensor.
      1. Using a oscilloscope, check the pulse generated, when the motor moving.

         Standard: 

         TESTER CONNECTION AND PULSE SENSOR PULSE SPECIFICATIONS
         
         

         Tester Connection	4 - 6
         Tool Setting	2 V/DIV., 50 ms/DiV
         Motor Condition	Anchor motor moving

   If the result is not as specified, replace the motor assy.

   Fig 4: Pulse Sensor Pulse Graph (Driver Side)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Passenger side: INSPECT HEIGHT ADJUSTABLE ANCHOR MOTOR 
   1. Disconnect the belt anchor adjuster.
   2. Apply battery voltage and check operation of the belt anchor adjuster.

      OK: 

      ANCHOR OPERATION SPECIFICATIONS (PASSENGER SIDE)
      
      

      Measurement Condition	Anchor operation
      Battery positive (+) --> Terminal 4 Battery negative (-) --> Terminal 3	Slider moves upward
      Battery positive (+) --> Terminal 3 Battery negative (-) --> Terminal 4	Slider moves downward

      If the result is not as specified, replace the motor.

      Fig 5: Inspecting Belt Anchor Adjuster Operation (Passenger Side)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   3. Check the PTC operation inside the anchor motor.
      NOTE: Perform this procedure with the shoulder belt anchor adjuster installed in the vehicle.
      1. Disconnect the passenger side shoulder belt anchor adjuster.
      2. Connect the ammeter's positive (+) lead to terminal 3 of the wire harness side connector and the negative (-) lead to the battery's negative terminal.
      3. Connect the battery's positive (+) lead to terminal 4 and negative (-) lead to terminal 3, and slide the anchor to the upward position.
      4. Continue to apply voltage, and check that the current changes to less than 1 A within 6 to 46 seconds.
      5. Disconnect the leads from the terminals.
         Fig 6: Checking PTC Operation Inside Anchor Motor (Passenger Side) (1 Of 2)

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      6. Approximately 60 seconds later, connect the battery's positive (+) lead to terminal 3 and the negative (-) lead to terminal 4, and check that the shoulder belt anchor adjuster slides to the downward position.

   If the result is not as specified, replace the motor assy.

   Fig 7: Checking PTC Operation Inside Anchor Motor (Passenger Side) (2 Of 2)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. INSPECT HEIGHT ADJUSTABLE ANCHOR SWITCH 
   1. Disconnect the connector.
   2. Check the switch resistance.

      Standard: 

      TESTER CONDITION AND RESISTANCE SPECIFICATIONS
      
      

      Tester Connection	Switch Position	Specified Condition
      2 - 3	UP	Below 1 Ω
      1 - 3	UP	10 kΩ or higher
      1 - 3	DOWN	Below 1 Ω
      2 - 3	DOWN	10 kΩ or higher

   If the result is not as specified, replace the switch.

   Fig 8: Identifying Height Adjustable Anchor Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002