POWER BACK DOOR SYSTEM TERMINALS OF ECU


  1. CHECK MULTIPLEX NETWORK DOOR ECU

    B0029KVE02

    1. Disconnect the U18 and U19 multiplex network door ECU connectors.

    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
      U18-1 (ECUB) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      U18-7 (IG) - Body ground W - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      U19-7 (GND) - Body ground W-B - Body ground Body ground Always Below 1 Ω
      U19-8 (B) - Body ground W - Body ground Battery power supply Always 11 to 14 V

    3. Reconnect the U18 and U19 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
      U18-2 (DSG2) - Body ground P - Body ground Power back door unit assembly set RH (door sensor) ground Always Below 1 V
      U18-3 (DSV2) - Body ground G - Body ground Power back door unit assembly set RH (door sensor) power supply Always 7 V or higher
      U18-5 (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
      U18-6 (BDDN) - Body ground LG - Body ground Door control switch signal Door control switch on Below 1 V
      Door control switch off Pulse generation
      U18-11 (DSG) - Body ground P - Body ground Power back door unit assembly set LH (door sensor) ground Always Below 1 V
      U18-12 (DSV) - Body ground G - Body ground Power back door unit assembly set LH (door sensor) power supply Always 7 V or higher
      U18-16 (OSR) - U18-17 (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
      U18-18 (OSL) - U18-17 (OSE) L - 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
      U18-20 (MSW) - Body ground W - Body ground Power back door main switch signal Power back door main switch on Below 1 V
      Power back door main switch off Pulse generation
      U18-22 (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)
      U18-23 (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)
      U18-25 (DS22) - Body ground R - 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)
      U18-26 (DS12) - Body ground L - 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)
      U19-10 (DC+) - U19-9 (DC-) B - R Back door lock assembly (back door lock motor) circuit Back door lock motor operating 11 to 14 V

      1. B002AKZN01

        Using an oscilloscope, check waveform 1.

        Waveform 1 (Reference)
        Item Condition
        Tester connection

        • U18-23 (DS1) - Body ground

        • U18-26 (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. B002AF5N01

        Using an oscilloscope, check waveform 2.

        Waveform 2 (Reference)
        Item Condition
        Tester connection

        • U18-22 (DS2) - Body ground

        • U18-25 (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) (w/ Entry and Start System)

    B002A15E77

    1. Disconnect the G82 and G84 certification ECU (smart key ECU assembly) connectors.

    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
      G82-2 (+B) - Body ground W - Body ground Battery power supply Always 11 to 14 V
      G82-10 (CUTB) - Body ground P - Body ground Battery power supply Always 11 to 14 V
      G84-5 (IG) - Body ground LG - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      G82-11 (E) - Body ground BR - Body ground Body ground Always Below 1 Ω

    3. Reconnect the G82 and G84 certification ECU (smart key ECU assembly) connectors.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G83-27 (TSW5) - Body ground Y - Body ground Back door opener switch assembly signal Back door opener switch assembly off Pulse generation
      Back door opener switch assembly on Below 1 V

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

    B002A22E03
    B002ABFC03
    *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-30 (BECU) -Body ground None - Body ground Battery power supply Always 11 to 14 V
      A-29 (ACC) -Body ground None - Body ground ACC power supply Ignition switch ACC 11 to 14 V
      Ignition switch off Below 1 V
      A-32 (IG) - Body ground None - Body ground IG power supply Ignition switch ON 11 to 14 V
      Ignition 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 according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G78-23 (BDSU) - Body ground* R - Body ground Back door opener switch assembly signal Back door opener switch assembly off Pulse generation
      Back door opener switch assembly on Below 1 V
      G79-27 (PBDS) - Body ground R - Body ground Back door control switch signal Back door control switch off Pulse generation
      Back door control switch on Below 1 V

      *: w/o Entry and Start System