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ROAD SIGN ASSIST SYSTEM TERMINALS OF ECU

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  1. B006594E02
    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 W18 forward recognition camera connector.

    CHECK FORWARD RECOGNITION CAMERA


    1. Disconnect the W18 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
      W18-7 (IGB) - W18-10 (GND) P - BR Power source Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      W18-10 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω

    3. Connect the W18 forward recognition camera connector.

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

      Tip:

      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
      W18-5 (CA1P) - W18-10 (GND) R - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      W18-11 (CA1N) - W18-10 (GND) B - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      W18-6 (CANH) - W18-10 (GND) GR - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      W18-12 (CANL) - W18-10 (GND) B - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)

      1. B0066XLE97
        Table 1.
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        WAVEFORM 1

        Item Content
        Terminal Name

        Between W18-5 (CA1P) and W18-10 (GND)

        Between W18-6 (CANH) and W18-10 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)
        Tip:

        The waveform varies depending on the CAN communication signal.

      2. B0067W2E89
        Table 2.
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        WAVEFORM 2

        Item Content
        Terminal Name

        Between W18-11 (CA1N) and W18-10 (GND)

        Between W18-12 (CANL) and W18-10 (GND)
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)
        Tip:

        The waveform varies depending on the CAN communication signal.