POWER BACK DOOR SYSTEM TERMINALS OF ECU


  1. CHECK MULTIPLEX NETWORK DOOR ECU


    1. Disconnect the Y16 and Y17 multiplex network door ECU connectors.

      B002KJEN07

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

      Tech Tips

      Measure the values on the wire harness side with the connector disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Y16-1 (ECUB) - Body ground W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      Y16-7 (IG) - Body ground W - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      Y17-8 (B) - Body ground LA-W - Body ground Auxiliary battery power supply Power switch off 11 to 14 V
      Y17-7 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω

    3. Reconnect the Y16 and Y17 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
      Y16-2 (DSG2) - Body ground V - Body ground Power back door unit assembly set RH (door sensor) ground Always Below 1 V
      Y16-3 (DSV2) - Body ground BE - Body ground Power back door unit assembly set RH (door sensor) power supply Always 7 V or higher
      Y16-5 (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
      Y16-6 (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
      Y16-11 (DSG) - Body ground GR - Body ground Power back door unit assembly set LH (door sensor) ground Always Below 1 V
      Y16-12 (DSV) - Body ground G - Body ground Power back door unit assembly set LH (door sensor) power supply Always 7 V or higher
      Y16-16 (OSR) - Y16-17 (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
      Y16-18 (OSL) - Y16-17 (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
      Y16-22 (DS2) - Body ground R - Body ground Power back door unit assembly set LH (door sensor) signal Power back door not operating 7 V or higher
      Power back door operating

      Pulse generation

      (See waveform 2)
      Y16-23 (DS1) - Body ground L - Body ground Power back door unit assembly set LH (door sensor) signal Power back door not operating 7 V or higher
      Power back door operating

      Pulse generation

      (See waveform 1)
      Y16-25 (DS22) - Body ground B - Body ground Power back door unit assembly set RH (door sensor) signal Power back door not operating 7 V or higher
      Power back door operating

      Pulse generation

      (See waveform 2)
      Y16-26 (DS12) - Body ground LG - Body ground Power back door unit assembly set RH (door sensor) signal Power back door not operating 7 V or higher
      Power back door operating

      Pulse generation

      (See waveform 1)
      Y17-10 (DC+) - Y17-9 (DC-) LA-BR - LA-R Back door lock assembly (back door lock motor) circuit Back door lock motor operating 11 to 14 V

      1. B002H4QN01

        Using an oscilloscope, check waveform 1.

        Waveform 1 (Reference)
        Item Condition
        Tester connection

        • Y16-23 (DS1) - Body ground

        • Y16-26 (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. B002K75N01

        Using an oscilloscope, check waveform 2.

        Waveform 2 (Reference)
        Item Condition
        Tester connection

        • Y16-22 (DS2) - Body ground

        • Y16-25 (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.

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


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

      B002JM5N40

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

      Tech Tips

      Measure the values on the wire harness side with the connector disconnected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I53-10 (+B) - Body ground W - Body ground Auxiliary battery power supply Power switch off 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. B002L2CC22
        *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

    B002HZ8C04
    *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 Power switch off 11 to 14 V
      A-30 (ACC) - Body ground None - Body ground ACC power supply Power switch on (ACC) 11 to 14 V
      Power switch off Below 1 V
      A-32 (IG) - Body ground None - Body ground IG power supply Power switch on (IG) 11 to 14 V
      Power 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