PRE-CRASH SAFETY SYSTEM TERMINALS OF ECU


  1. CHECK MILLIMETER WAVE RADAR SENSOR

    B0025ZXE18

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

      Tech Tips

      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
        *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

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    4. WAVEFORM 2


      1. B0028Y4E89
        *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

        Tech Tips

        The waveform varies depending on the CAN communication signal.

  2. CHECK FORWARD RECOGNITION CAMERA

    B00266CE52

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

      Tech Tips

      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-crash system cancel switch assembly Pre-crash system cancel switch assembly being pressed Below 1 Ω
      Pre-crash 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
        *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

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    4. WAVEFORM 2


      1. B0028Y4E89
        *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

        Tech Tips

        The waveform varies depending on the CAN communication signal.