POWER BACK DOOR SYSTEM TERMINALS OF ECU


  1. CHECK MULTIPLEX NETWORK DOOR ECU

    B0010JRN03

    1. Disconnect the Z16 and Z17 multiplex network door ECU connectors.

    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
      Z16-20 (ECUB) - Body ground GR - Body ground Battery power supply Always 11 to 14 V
      Z16-18 (IG) - Body ground P - Body ground IG power supply Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      Z17-1 (B) - Body ground Y - Body ground Battery power supply Always 11 to 14 V
      Z17-10 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω

    3. Reconnect the Z16 and Z17 multiplex network door ECU connectors.

    4. Measure the voltage and check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Z16-1 (DS1) - Body ground Y - 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)
      Z16-2 (DS2) - Body ground W - 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)
      Z16-3 (DS12) - Body ground Y - 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)
      Z16-4 (DS22) - Body ground W - 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)
      Z16-5 (DSV2) - Body ground L - Body ground Power back door unit assembly RH (door sensor) power supply Always 7 V or higher
      Z16-6 (OSR) - Z16-24 (OSE) B - R 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
      Z16-8 (BDDN) - Body ground W - Body ground Back door control switch signal Back door control switch on Below 1 V
      Back door control switch off Pulse generation
      Z16-16 (BZR+) - Body ground GR - 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
      Z16-19 (DSG2) - Body ground P - Body ground Power back door unit assembly RH (door sensor) ground Always Below 1 V
      Z16-21 (DSG) - Body ground P - Body ground Power back door unit assembly LH (door sensor) ground Always Below 1 V
      Z16-25 (DSV) - Body ground L - Body ground Power back door unit assembly LH (door sensor) power supply Always 7 V or higher
      Z16-26 (OSL) - Z16-24 (OSE) B - R 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
      Z17-4 (DC+) - Z17-3 (DC-) W - B 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

      1. B0010QVN01

        Using an oscilloscope, check waveform 1.

        Waveform 1 (Reference)
        Item Condition
        Tester Connection

        • Z16-1 (DS1) - Body ground

        • Z16-3 (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. B0010D1N01

        Using an oscilloscope, check waveform 2.

        Waveform 2 (Reference)
        Item Condition
        Tester Connection

        • Z16-2 (DS2) - Body ground

        • Z16-4 (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.

  2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Disconnect the J41 certification ECU (smart key ECU assembly) connector.

    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
      J41-4 (+B) - Body ground V - Body ground Battery power supply Always 11 to 14 V
      J41-18 (E) - Body ground W-B - Body ground Body ground Always Below 1 Ω

    3. Reconnect the J41 certification ECU (smart key ECU assembly) connector.

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

      for LHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      R1-26 (TSW5) - J41-18 (E) G - W-B Back door opener switch assembly (open switch) signal Back door opener switch assembly (open switch) off → on Pulse generation (See waveform 1)
      for RHD
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      S5-26 (TSW5) - J41-18 (E) G - W-B Back door opener switch assembly (open switch) signal Back door opener switch assembly (open switch) off → on Pulse generation (See waveform 1)

      1. B005O8TC22
        *a Checking for switch on signal at short intervals

        Using an oscilloscope, check the waveform.

        Waveform 1 (Reference)
        Item Content
        Terminal No. (Symbol) R1-26 (TSW5) - J41-18 (E)*1
        S5-26 (TSW5) - J41-18 (E)*2
        Tool Setting 2 V/DIV., 500 ms./DIV.
        Condition Back door opener switch assembly (open switch) off → on

        • *1: for LHD

        • *2: for RHD

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

    B005PPOC07
    *A for LHD *B for RHD

    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      Click here

    2. Reconnect the instrument panel junction block assembly connectors.

    3. Measure the resistance and voltage 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
      MB-31 (BECU) - Body ground - Battery power supply Always 11 to 14 V
      MB-32 (IG) - Body ground - Ignition power supply (IG signal) Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      MB-30 (ACC) - Body ground - Ignition power supply (ACC signal) Engine switch off Below 1 V
      Engine switch on (ACC) 11 to 14 V
      MB-11 (GND1) - Body ground - Ground Always Below 1 Ω

    4. Install the main body ECU (multiplex network body ECU) to instrument panel junction block assembly.

      Click here

    5. Measure the voltage and check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      J9-5 (PBDS) - Body ground R - Body ground Power back door switch (integration control and panel assembly) signal Power back door switch (integration control and panel assembly) off Pulse generation
      Power back door switch (integration control and panel assembly) on Below 1 V