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.
      Fig 1: Inspecting Height Adjustable Anchor Motor

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      HEIGHT ADJUSTABLE ANCHOR MOTOR - VOLTAGE TABLE
      
      

      Measurement Condition	Specified Condition
      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.

   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.
         Fig 2: Checking Shoulder Belt Anchor Adjuster Slides To Upward Position

         Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      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 3: Checking Shoulder Belt Anchor Adjuster Slides To Downward Position

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Check the pulse of the pulse sensor.
   1. Using a oscilloscope, check the pulse generated, with the motor moving.
   Fig 4: Identifying Pulse Sensor Graph
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard: 

   PULSE SENSOR REFERENCE TABLE
   
   

   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.

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.
      Fig 5: Inspecting Height Adjustable Anchor Motor

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      HEIGHT ADJUSTABLE ANCHOR MOTOR - VOLTAGE TABLE
      
      

      Measurement Condition	Specified Condition
      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.

   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 Shoulder Belt Anchor Adjuster Slides To Upward Position

      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 Shoulder Belt Anchor Adjuster Slides To Downward Position

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. INSPECT HEIGHT ADJUSTABLE ANCHOR SWITCH 
   1. Disconnect the connector.
   2. Check the switch resistance.
   Fig 8: Inspecting Height Adjustable Anchor Switch
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard: 

   HEIGHT ADJUSTABLE ANCHOR SWITCH - RESISTANCE TABLE
   
   

   Tester Connection	Switch Condition	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.