Power Shoulder Belt Anchorage System - Diagnostics: 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: 
   1. INSPECT SHOULDER BELT ANCHOR MOTOR LH 
   1. Disconnect the belt anchor adjuster.
   2. Apply battery voltage and check operation of the belt anchor adjuster.
      Fig 1: Checking Operation Of Belt Anchor Adjuster

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      SHOULDER BELT ANCHOR MOTOR LH - 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.
      Fig 2: Checking PTC Operation Inside Regulator Motor

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: The work must be performed 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 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 to downward position.

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

      Fig 3: Checking Shoulder Belt Anchor Adjusts To Downward Position

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

   Standard: 

   REGULATOR MOTOR - WAVEFORM TABLE
   
   

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

   Fig 4: Checking Pulse Of Pulse Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

2. Passenger side: 
   1. INSPECT SHOULDER BELT ANCHOR MOTOR RH 
   1. Disconnect the belt anchor adjuster.
   2. Apply battery voltage and check operation of the belt anchor adjuster.
      Fig 5: Checking Operation Of Belt Anchor Adjuster

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      SHOULDER BELT ANCHOR MOTOR RH - 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.
      Fig 6: Checking PTC Operation Inside Anchor Motor

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      NOTE: The work must be performed 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 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.
      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 adjusts to downward position.

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

      Fig 7: Checking Shoulder Belt Anchor Adjusts To Downward Position

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

   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

   Fig 8: Inspecting Height Adjustable Anchor Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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