ROAD SIGN ASSIST SYSTEM TERMINALS OF ECU


  1. CHECK FORWARD RECOGNITION CAMERA

    Note


    • DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the GTS once the inspection has been completed.

    • Do not apply excessive force to the a5 forward recognition camera connector.

    B000YU7E83

    1. Disconnect the a5 forward recognition camera connector.

    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
      a5-7 (IGB) - a5-10 (GND) LA-B - W-B Power source Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      a5-10 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω

    3. Reconnect the a5 forward recognition camera connector.

    4. 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 forward recognition camera is suspected.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      a5-5 (CA1P) - a5-10 (GND) R - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      a5-11 (CA1N) - a5-10 (GND) P - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      a5-6 (CANH) - a5-10 (GND) W - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      a5-12 (CANL) - a5-10 (GND) R - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)

      1. B000YXHE97
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        WAVEFORM 1

        Item Content
        Terminal Name

        Between a5-5 (CA1P) and a5-10 (GND)

        Between a5-6 (CANH) and a5-10 (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. B000WYNE89
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        WAVEFORM 2

        Item Content
        Terminal Name

        Between a5-11 (CA1N) and a5-10 (GND)

        Between a5-12 (CANL) and a5-10 (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.