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PRE-COLLISION SYSTEM TERMINALS OF ECU

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  1. B0025ZXE18

    CHECK MILLIMETER WAVE RADAR SENSOR


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

      Tip:

      If the result is not as specified, there may be a malfunction on the wire harness side.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A64-8 (IGB) - A64-1 (SGND) V - BR Power source Ignition switch ON

      11 to 14 V*1

      10.5 to 16 V*2
      A64-1 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω

      *1: w/o Stop and Start System

      *2: w/ Stop and Start System

    2. Check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      A64-3 (CA2H) - A64-1 (SGND) R - BR CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 1)
      A64-2 (CA2L) - A64-1 (SGND) W - BR CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 2)
      A64-5 (CA1P) - A64-1 (SGND) B - BR CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 1)
      A64-6 (CA1N) - A64-1 (SGND) W - BR CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 2)

    3. WAVEFORM 1


      1. B0027VBE97
        Table 1.
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        CAN communication signal

        Item Content
        Terminal Name

        Between A64-3 (CA2H) and A64-1 (SGND)

        Between A64-5 (CA1P) and A64-1 (SGND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Ignition switch ON
        Tip:

        The waveform varies depending on the CAN communication signal.

    4. WAVEFORM 2


      1. B0028Y4E89
        Table 2.
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        CAN communication signal

        Item Content
        Terminal Name

        Between A64-2 (CA2L) and A64-1 (SGND)

        Between A64-6 (CA1N) and A64-1 (SGND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Ignition switch ON
        Tip:

        The waveform varies depending on the CAN communication signal.

  2. B00266CE52

    CHECK FORWARD RECOGNITION CAMERA


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

      Tip:

      If the result is not as specified, there may be a malfunction on the wire harness side.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Q4-8 (BZ) - Q4-10 (GND) R - B Skid control buzzer Ignition switch ON, skid control buzzer not operating 11 to 14 V
      Ignition switch ON, skid control buzzer operating 0 to 1.5 V
      Q4-9 (PBSW) - Q4-10 (GND) P - B Pre-collision system cancel switch assembly Pre-collision system cancel switch assembly being pressed Below 1 Ω
      Pre-collision system cancel switch assembly not being pressed 100 kΩ or higher
      Q4-7 (IGB) - Q4-10 (GND) V - B Power source Ignition switch ON 11 to 14 V*1
      10.5 to 16 V*2
      Ignition switch off Below 1 V
      Q4-10 (GND) - Body ground B - Body ground Ground Always Below 1 Ω

      *1: w/o Stop and Start System

      *2: w/ Stop and Start System

    2. Check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      Q4-5 (CA1P) - Q4-10 (GND) B - B CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 1)
      Q4-6 (CANH) - Q4-10 (GND) B - B CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 1)
      Q4-11 (CA1N) - Q4-10 (GND) V - B CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 2)
      Q4-12 (CANL) - Q4-10 (GND) BR - B CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 2)

    3. WAVEFORM 1


      1. B0027VBE97
        Table 3.
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        CAN communication signal

        Item Content
        Terminal Name

        Between Q4-5 (CA1P) - Q4-10 (GND)

        Between Q4-6 (CANH) - Q4-10 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Ignition switch ON
        Tip:

        The waveform varies depending on the CAN communication signal.

    4. WAVEFORM 2


      1. B0028Y4E89
        Table 4.
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        CAN communication signal

        Item Content
        Terminal Name

        Between Q4-11 (CA1N) - Q4-10 (GND)

        Between Q4-12 (CANL) - Q4-10 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Ignition switch ON
        Tip:

        The waveform varies depending on the CAN communication signal.