DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Power Back Door System - Diagnostics - Introduction >> Power Back Door System >> Terminals Of Ecu [11/2023 - ] >> Terminals Of Ecu [11/2023 - ]

Terminals Of Ecu [11/2023 - ]

  1. CHECK MULTIPLEX NETWORK DOOR ECU 
    GTY1178942Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the W27, W28 and W30 multiplex network door ECU connectors.
    2. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      W30-9 (IG) - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      W30-7 (ECUB) - Body ground Auxiliary battery power supply Ignition switch off 11 to 14 V
      W27-5 (B) - Body ground Auxiliary battery power supply Ignition switch off 11 to 14 V
      W28-4 (GND) - Body ground Body ground Always Below 1 Ω
    3. Reconnect the W27, W28 and W30 multiplex network door ECU connectors.
    4. Measure the voltage and waveform according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      W28-2 (DC+) - W28-6 (DC-) Back door lock assembly (back door lock motor) circuit Back door lock motor operating 11 to 14 V
      Back door lock motor not operating Below 1 V
      W29-1 (OSL) - W29-9 (OSE) Power back door sensor assembly LH signal Power back door sensor assembly LH not pressed 2 to 3 V
      Power back door sensor assembly LH pressed Below 1 V
      W29-3 (DSV2) - Body ground Power back door unit assembly set RH (door sensor) power supply Always 7 V or higher
      W29-4 (DSV) - Body ground Power back door unit assembly set LH (door sensor) power supply Always 7 V or higher
      W29-5 (DS2) - Body ground Power back door unit assembly set LH (door sensor) signal Power back door not operating 0 V or 7 V or higher
      Power back door operating Pulse generation
      (See waveform 2)
      W29-6 (DS12) - Body ground Power back door unit assembly set RH (door sensor) signal Power back door not operating 0 V or 7 V or higher
      Power back door operating Pulse generation
      (See waveform 1)
      W29-8 (OSR) - W29-9 (OSE) Power back door sensor assembly RH signal Power back door sensor assembly RH not pressed 2 to 3 V
      Power back door sensor assembly RH pressed Below 1 V
      W29-10 (DSG2) - Body ground Power back door unit assembly set RH (door sensor) ground Always Below 1 V
      W29-11 (DSG) - Body ground Power back door unit assembly set LH (door sensor) ground Always Below 1 V
      W29-12 (DS22) - Body ground Power back door unit assembly set RH (door sensor) signal Power back door not operating 0 V or 7 V or higher
      Power back door operating Pulse generation
      (See waveform 2)
      W29-13 (DS1) - Body ground Power back door unit assembly set LH (door sensor) signal Power back door not operating 0 V or 7 V or higher
      Power back door operating Pulse generation
      (See waveform 1)
      W30-1 (BZR+) - Body ground Power back door warning buzzer signal Power back door warning buzzer sounding Pulse generation
      Power back door warning buzzer not sounding Below 1 V
      W30-3 (FUL) - Body ground Back door lock with courtesy light switch assembly input Back door open Below 1 V
      Back door closed Pulse generation
      W30-5 (HAF) - Body ground Back door lock with courtesy light switch assembly lock signal Back door closed 11 to 14 V
      Back door fully open Below 1 V
      W30-11 (LIB) - Body ground Back door lock with courtesy light switch assembly lock signal Back door is locked 11 to 14 V
      Back door is unlocked Below 1 V
      W30-13 (PAWL) - Body ground Back door lock with courtesy light switch assembly lock signal Back door fully open 11 to 14 V
      Back door ajar Below 1 V
      Back door closed 11 to 14 V
      A certain amount of time after back door closed Below 1 V
      W30-14 (BDDN) - Body ground No. 1 power back door control switch signal No. 1 power back door control switch on Below 1 V
      No. 1 power back door control switch off Pulse generation
      W30-15 (POS) - Body ground Back door lock with courtesy light switch assembly signal Back door open Below 1 V
      Back door closer operating 11 to 14 V
      Operation complete Below 1 V
      W30-12 (KSIN) - Body ground* Kick detection signal Kick door control sensor not detecting a foot → detecting a foot Pulse generation
      (See waveform 3)
      1. *: w/ Hands Free Power Back Door
      1. Using an oscilloscope, check waveform 1.
        GTY633804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 1 (REFERENCE)

        Item Condition
        Tester Connection
        • W29-13 (DS1) - Body ground
        • W29-6 (DS12) - Body ground
        Tool Setting 2 V/DIV., 2 ms./DIV.
        Vehicle Condition Power back door operating

        HINT: 

        • The period changes in accordance with the speed at which the power back door is opened and closed.
        • The wave height changes in accordance with the auxiliary battery voltage.
      2. Using an oscilloscope, check waveform 2.
        WAVEFORM 2 (REFERENCE)

        Item Condition
        Tester Connection
        • W29-5 (DS2) - Body ground
        • W29-12 (DS22) - Body ground
        Tool Setting 2 V/DIV., 2 ms./DIV.
        Vehicle Condition Power back door operating
        GTY656366Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        HINT: 

        • The period changes in accordance with the speed at which the power back door is opened and closed.
        • The wave height changes in accordance with the auxiliary battery voltage.
      3. Using an oscilloscope, check waveform 3.
        WAVEFORM 3 (REFERENCE)

        Item Condition
        Tester Connection W30-12 (KSIN) - Body ground
        Tool setting 2 V/DIV., 50 ms/DIV.
        Vehicle condition Kick door control sensor not detecting a foot → detecting a foot
        GTY928805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Kick detection signal
  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) 

    Refer to TERMINALS OF ECU [11/2023 - ]

  3. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY 
    GTY1250047Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    NOTE:

    When disconnecting a wire harness of any component connected to the supply power of the integrated capacitor (integration control supply) or when removing the integrated capacitor (integration control supply), make sure to wait 5 minutes or more after turning the ignition switch off for self-diagnosis to complete and the voltage of the integrated capacitor (integration control supply) to discharge.

    1. Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

      Refer to REMOVAL [11/2023 - ]

    2. Connect the power distribution box assembly connectors.
    3. Measure the resistance and voltage according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      MB-13 (GND1) - Body ground Ground Always Below 1 Ω
      MB-26 (BECU) - Body ground Auxiliary battery power supply Ignition switch off*1
      Always*2      		 11 to 14 V
      MB-27 (IGR) - Body ground Ignition power supply (IG signal) Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      1. *1: for HV Model
      2. *2: for Gasoline Model
    4. Install the main body ECU (multiplex network body ECU).

      Refer to INSTALLATION [11/2023 - ]

    5. Measure the voltage and check for pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      H136-21 (PBDS) - Body ground Power back door control switch signal Power back door control switch off Pulse generation
      Power back door control switch on Below 1 V
      H135-7 (LSBO) - Body ground Back door lock signal Back door is locked Below 1 V
      Back door is unlocked 11 to 14 V
      8G-2 (BCTY) - Body ground Back door courtesy light switch input Back door closed 11 to 14 V
      Back door open Below 1 V
Diesel-Data.com