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Home >> Toyota >> 2008 >> Highlander Base, FWD >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> (Door / Hatch) (Except Hybrid) >> Power Back Door System >> Touch Sensor Circuit >> Inspection Procedure

Inspection Procedure

  1. READ VALUE OF TECHSTREAM (POWER BACK DOOR TOUCH SENSOR) 
    1. Check the Data List for proper functioning of the power back door touch sensor.

      Back door (Power back door ECU) 

      DIAGNOSTIC NOTE TABLE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      PBD Touch Sen L Power back door touch sensor LH signal / ON or OFF ON Power back door touch sensor LH is pressed
      OFF Power back door touch sensor LH is not pressed
      -
      PBD Touch Sen R Power back door touch sensor RH signal/ON or OFF ON Power back door touch sensor RH is pressed
      OFF Power back door touch sensor RH is not pressed
      -

      OK: The display is as specified in the normal condition. 

    NG: Go to step   2 

    OK: REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)  (See INITIALIZATION  )

  2. INSPECT POWER BACK DOOR TOUCH SENSOR 
    1. Remove the power back door touch sensor. (See REMOVAL  )
    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION TABLE

      Tester Connection Condition Specified Condition
      1 - 2 Not pressed Approx. 1 kΩ
      1 - 2 Pressed Below 100 Ω
      Fig 1: Identifying Power Back Door Touch Sensor
      G05422048Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE POWER BACK DOOR TOUCH SENSOR  (See REMOVAL  )

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (POWER BACK DOOR TOUCH SENSOR - POWER BACK DOOR DRIVE UNIT AND BODY GROUND) 
    1. LH Side
      1. Disconnect the T7 sensor connectors.
      2. Disconnect the O15 ECU connector.
      3. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION TABLE

        Tester Connection Condition Specified Condition
        T7-1 (OSL) - O15-15 (OSL) Always Below 1 Ω
        T7-2 (OSLE) - O15-14 (OSE) Always Below 1 Ω
        T7-1 (OSL) - Body ground Always 10 kΩ or higher
        T7-2 (OSLE) - Body ground Always Below 1 Ω
        Fig 2: Identifying Harness & Connector (Power Back Door Touch Sensor - Power Back Door Drive Unit & Body Ground) (1 Of 2)
        G05422049Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. RH Side
      1. Disconnect the T8 sensor connectors.
      2. Disconnect the O15 ECU connector.
      3. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        TESTER CONNECTION SPECIFIED CONDITION TABLE

        Tester Connection Condition Specified Condition
        T8-1 (OSR) - O15-13 (OSR) Always Below 1 Ω
        T8-2 (OSRE) - O15-14 (OSE) Always Below 1 Ω
        T8-1 (OSR) - Body ground Always 10 kΩ or higher
        T8-2 (OSRE) - Body ground Always Below 1 Ω
        Fig 3: Identifying Harness & Connector (Power Back Door Touch Sensor - Power Back Door Drive Unit & Body Ground) (2 Of 2)
        G05422050Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)  (See INITIALIZATION  )