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Section 108 (Power Back Door System): Inspection

WARNING: This page is about a different car, the 2004 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT POWER BACK DOOR MAIN SWITCH 
    1. Inspect the resistance of the main switch.

      Standard: 

      POWER BACK DOOR MAIN SWITCH SPECIFICATIONS

      Terminal No. Condition Specified Condition
      4 - 5 Free (ON) Below 1 Ω
      4 - 5 Pushed (OFF) 10 kΩ or higher

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

    2. Apply battery voltage and check the illuminates.

      Standard: 

      BATTERY SPECIFICATIONS

      Measurement Condition Specified Condition
      Battery positive (+) --> Terminal 1 Battery negative (-) --> Terminal 2 Illuminates
    NOTE: Whether the switch illuminates or not will not affect the function of the LH side.

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

    Fig 1: Inspecting Power Back Door Main Switch
    G03061838Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT SATELLITE SWITCH 
    1. Inspect the resistance of the back door switch.

      Standard: 

      SATELLITE SWITCH SPECIFICATIONS

      Terminal No. Condition Specified Condition
      3 - 5 Free (OFF) 10 kΩ or higher
      3 - 5 Pushed (ON) Below 1 Ω

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

    2. Apply battery voltage and check whether the switch illuminates.

      Standard: 

      BATTERY VOLTAGE SPECIFICATIONS

      Measurement Condition Specified Condition
      Battery positive (+) --> Terminal 8 Battery negative (-) --> Terminal 7 Illuminates
    NOTE: Whether the switch illuminates or not will not affect the function of the RH side.

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

    Fig 2: Inspecting Satellite Switch
    G03061839Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT BACK DOOR OPENER SWITCH 
    1. Inspect the resistance of the switch.

      Standard: 

      BACK DOOR OWNER SWITCH SPECIFICATIONS

      Terminal No. Condition Specified Condition
      1 - 2 Free 10 kΩ or higher
      1 - 2 Pushed Below 1 Ω

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

    Fig 3: Inspecting Back Door Owner Switch
    G03061840Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT POWER BACK DOOR TOUCH SENSOR LH 
    1. Check the resistance of the sensor.

      Standard: 

      POWER BACK DOOR TOUCH SENSOR LH SPECIFICATIONS

      Terminal No. Condition Specified condition
      1 - 2 Free Approx. 1 kΩ
      1 - 2 Pressed Below 100 Ω

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

    Fig 4: Inspecting Power Back Door Touch Sensor LH
    G03061841Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT POWER BACK DOOR TOUCH SENSOR RH 
    1. Check the resistance of the sensor.

      Standard: 

      POWER BACK DOOR TOUCH SENSOR RH SPECIFICATIONS

      Terminal No. Condition Specified condition
      1 - 2 Free Approx. 1 kΩ
      1 - 2 Pressed Below 100 Ω

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

    Fig 5: Inspecting Power Back Door Touch Sensor RH
    G03061842Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT POWER BACK DOOR DRIVE UNIT 
    1. Remove the unit.
    2. Apply battery voltage to the terminals and check the motor operation.

      Standard: 

      POWER BACK DOOR DRIVE UNIT SPECIFICATIONS

      Measurement Condition Specified Condition
      Battery positive (+) --> Terminal 8 Battery negative (-) --> Terminal 7 Open
      Battery positive (+) --> Terminal 7 Battery negative (-) --> Terminal 8 Close

      If the result is not as specified, replace the drive unit.

    3. Check the resistance of the clutch terminals.

      Standard: 

      TERMINALS SPECIFICATIONS

      Terminal No. Specified Condition
      3 - 9 4.0 Ω

      If the result is not as specified, replace the drive unit.

    4. Reinstall the unit with the connector connected.
      Fig 6: Inspecting Power Back Door Drive Unit
      G03061843Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Check the pulse of the pulse sensor.
      1. Using an oscilloscope, check the pulse generated when the door is manually opened and closed.

      Standard (Reference): 

      PULSE SENSOR SPECIFICATIONS

      Terminal 1 - 2, 2 - 5
      Tool setting 10 V/DIV., 10 ms/DIV.
      Vehicle condition Door moving

      If the result is not as specified, replace the drive unit.

      NOTE: A cycle of the pulse changes between approx. 10 to 20 msec. according to the speeds that the slide door is moving.
      Fig 7: Checking Pulse Of Pulse Sensor
      G03061844Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. With the connector connected, check the voltage of the terminals of the power back door drive unit connector.
  7. POWER BACK DOOR WARNING BUZZER 
    1. Check the resistance of the buzzer.

      Standard: 

      BACK DOOR WARNING BUZZER SPECIFICATIONS

      Terminal No. Specified Condition
      1 - 2 Approx. 1 kΩ

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

    NOTE:
    • The circuit that causes the buzzer to sounds is built into the back door ECU, not around the buzzer.
    • Directly applying battery voltage to the buzzer does not cause the buzzer to sound.
    Fig 8: Identifying Power Back Door Warning Buzzer
    G03061845Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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