PRE-COLLISION SYSTEM TERMINALS OF ECU


  1. CHECK DRIVING SUPPORT ECU ASSEMBLY

    B006C8RE67

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G68-7 (B) - G68-28 (GND) LA-V - LA Power source Engine switch on (IG) 10.5 to 16 V
      Engine switch off Below 1 V
      G68-28 (GND) - Body ground LA - Body ground Ground Always Below 1 Ω

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

      Tech Tips

      If the waveform is not similar to that shown in the illustration, a malfunction of a CAN bus line, terminating resistor, or the driving support ECU assembly is suspected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G68-8 (CA1P) - G68-28 (GND) R - LA CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      G68-9 (CA1N) - G68-28 (GND) W - LA CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      G68-10 (CA2H) - G68-28 (GND) R - LA CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      G68-11 (CA2L) - G68-28 (GND) W - LA CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      G68-12 (CA3H) - G68-28 (GND) Y - LA CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      G68-13 (CA3L) - G68-28 (GND) W - LA CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)

      1. B006F9EE11

        WAVEFORM 1

        Item Content
        Terminal Name

        Between G68-8 (CA1P) - G68-28 (GND)

        Between G68-10 (CA2H) - G68-28 (GND)

        Between G68-12 (CA3H) - G68-28 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

      2. B006A77E12

        WAVEFORM 2

        Item Content
        Terminal Name

        Between G68-9 (CA1N) - G68-28 (GND)

        Between G68-11 (CA2L) - G68-28 (GND)

        Between G68-13 (CA3L) - G68-28 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

  2. CHECK MILLIMETER WAVE RADAR SENSOR

    B006EFOE52

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      C6-8 (IGB) - C6-1 (SGND) R - W-B Power source Engine switch on (IG) 10.5 to 16 V
      C6-1 (SGND) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

      Tech Tips

      If the waveform is not similar to that shown in the illustration, a malfunction of a CAN bus line, terminating resistor, or the millimeter wave radar sensor is suspected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      C6-3 (CA2H) - C6-1 (SGND) V - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      C6-2 (CA2L) - C6-1 (SGND) W - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      C6-5 (CA1P) - C6-1 (SGND) B - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      C6-6 (CA1N) - C6-1 (SGND) W - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)

      1. B006F9EE12

        WAVEFORM 1

        Item Content
        Terminal Name

        Between C6-3 (CA2H) and C6-1 (SGND)

        Between C6-5 (CA1P) and C6-1 (SGND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

      2. B006A77E13

        WAVEFORM 2

        Item Content
        Terminal Name

        Between C6-2 (CA2L) and C6-1 (SGND)

        Between C6-6 (CA1N) and C6-1 (SGND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.