POWER BACK DOOR SYSTEM TERMINALS OF ECU


  1. CHECK MULTIPLEX NETWORK DOOR ECU


    1. Disconnect the Y25 and Y26 multiplex network door ECU connectors.

      B008HPEN14

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Y25-18 (IG) - Body ground W - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      Y25-20 (ECUB) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      Y26-1 (B) - Body ground LA-W - Body ground Battery power supply Always 11 to 14 V
      Y26-10 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω

    3. Reconnect the Y25 and Y26 multiplex network door ECU connectors.

    4. Measure the voltage and waveform according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Y25-1 (DS1) - Body ground L - Body ground Power back door unit assembly LH (door sensor) signal Power back door not operating 7 V or higher
      Power back door operating

      Pulse generation

      (See waveform 1)
      Y25-2 (DS2) - Body ground R - Body ground Power back door unit assembly LH (door sensor) signal Power back door not operating 7 V or higher
      Power back door operating

      Pulse generation

      (See waveform 2)
      Y25-3 (DS12) - Body ground LG - Body ground Power back door unit assembly RH (door sensor) signal Power back door not operating 7 V or higher
      Power back door operating

      Pulse generation

      (See waveform 1)
      Y25-4 (DS22) - Body ground B - Body ground Power back door unit assembly RH (door sensor) signal Power back door not operating 7 V or higher
      Power back door operating

      Pulse generation

      (See waveform 2)
      Y25-5 (DSV2) - Body ground BE - Body ground Power back door unit assembly RH (door sensor) power supply Always 7 V or higher
      Y25-6 (OSR) - Y25-24 (OSE) SB - GR Power back door sensor assembly RH signal Power back door sensor assembly RH not pressed 4 to 6 V
      Power back door sensor assembly RH pressed Below 1 V
      Y25-8 (BDDN) - Body ground LG - Body ground Back door control switch signal Back door control switch on Below 1 V
      Back door control switch off Pulse generation
      Y25-10 (CLSW) - Body ground V - Body ground Door control switch signal Door control switch on Below 1 V
      Door control switch off 11 to 14 V
      Y25-14 (KSIN) - Body ground* W - Body ground Kick detection signal Kick door control sensor not detecting a foot → detecting a foot

      Pulse generation

      (See waveform 3)
      Y25-16 (BZR+) - Body ground V - Body ground Wireless door lock buzzer signal Power back door warning buzzer sounding Pulse generation
      Power back door warning buzzer not sounding Below 1 V
      Y25-19 (DSG2) - Body ground V - Body ground Power back door unit assembly RH (door sensor) ground Always Below 1 V
      Y25-21 (DSG) - Body ground GR - Body ground Power back door unit assembly LH (door sensor) ground Always Below 1 V
      Y25-25 (DSV) - Body ground G - Body ground Power back door unit assembly LH (door sensor) power supply Always 7 V or higher
      Y25-26 (OSL) - Y25-24 (OSE) P - GR Power back door sensor assembly LH signal Power back door sensor assembly LH not pressed 4 to 6 V
      Power back door sensor assembly LH pressed Below 1 V
      Y26-4 (DC+) - Y26-3 (DC-) LA-BR - LA-R 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

      *: w/ Hands Free Power Back Door


      1. B008HSZN01

        Using an oscilloscope, check waveform 1.

        Waveform 1 (Reference)
        Item Condition
        Tester Connection

        • Y25-1 (DS1) - Body ground

        • Y25-3 (DS12) - Body ground
        Tool setting 2 V/DIV., 2 ms./DIV.
        Vehicle condition Power back door operating

        Tech Tips

        The period changes in accordance to the speed at which the power back door is opened and closed.

      2. B008HUNN01

        Using an oscilloscope, check waveform 2.

        Waveform 2 (Reference)
        Item Condition
        Tester Connection

        • Y25-2 (DS2) - Body ground

        • Y25-4 (DS22) - Body ground
        Tool setting 2 V/DIV., 2 ms./DIV.
        Vehicle condition Power back door operating

        Tech Tips

        The period changes in accordance to the speed at which the power back door is opened and closed.

      3. B008I86C01
        *a Kick detection signal

        Using an oscilloscope, check waveform 3.

        Waveform 3 (Reference)
        Item Content
        Tester connection Y26-14 (KSIN) - Body ground
        Tool setting 2 V/DIV., 50 ms./DIV.
        Vehicle condition Kick door control sensor not detecting a foot → detecting a foot

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Disconnect the I53 certification ECU (smart key ECU assembly) connector.

      B008JKIN40

    2. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I53-10 (+B) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      I53-11 (E) - Body ground W-B - Body ground Body ground Always Below 1 Ω

    3. Reconnect the I53 certification ECU (smart key ECU assembly) connector.

    4. Measure the waveform according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I52-5 (TSW5) - Body ground Y - Body ground Back door opener switch assembly signal Back door opener switch assembly (open switch) off → on Pulse generation (See waveform 1)

      1. B008J8RC22
        *a In actuality, sampling is being performed

        Using an oscilloscope, check waveform 1.

        Waveform 1 (Reference)
        Item Content
        Terminal No. (Symbol) I52-5 (TSW5) - I53-11 (E)
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Back door opener switch assembly (open switch) off → on

  3. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    B008IJ6C04
    *1 Main Body ECU (Multiplex Network Body ECU) - -

    1. Remove the main body ECU (multiplex network body ECU).

      for LHD : Click here

      for RHD : Click here

    2. Connect the instrument panel junction block assembly connectors.

    3. Measure the voltage and resistance according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A-31 (BECU) - Body ground None - Body ground Battery power supply Always 11 to 14 V
      A-30 (ACC) - Body ground None - Body ground ACC power supply Engine switch on (ACC) 11 to 14 V
      Engine switch off Below 1 V
      A-32 (IG) - Body ground None - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      A-11 (GND1) - Body ground None - Body ground Body ground Always Below 1 Ω

    4. Install the main body ECU (multiplex network body ECU).

      for LHD : Click here

      for RHD : Click here

    5. Measure the voltage and waveform according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I47-5 (PBDS) - Body ground R - Body ground Combination switch assembly signal Combination switch assembly off Pulse generation
      Combination switch assembly on Below 1 V