ROAD SIGN ASSIST SYSTEM TERMINALS OF ECU


  1. CHECK FORWARD RECOGNITION CAMERA

    Note


    • DTCs may be stored 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 Q4 forward recognition camera connector.


    1. Disconnect the Q4 forward recognition camera connector.

      A01SI3IE03

    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
      Q4-7 (IGB) - Body ground V - Body ground 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

      Tech Tips

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

    3. Reconnect the Q4 forward recognition camera connector.

      A01SGUIC15
      *a

      Component with harness connected

      (Forward Recognition Camera)

      		 - -

    4. 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)
      Q4-11 (CA1N) - Q4-10 (GND) V - B CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 2)
      Q4-6 (CANH) - Q4-10 (GND) B - B CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 1)
      Q4-12 (CANL) - Q4-10 (GND) BR - B CAN communication signal Ignition switch ON

      Pulse generation

      (See waveform 2)

    5. WAVEFORM 1


      1. B0027VBE96
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        CAN communication signal

        Item Content
        Tester Connection

        • Q4-5 (CA1P) - Q4-10 (GND)

        • Q4-6 (CANH) - Q4-10 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Ignition switch ON

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    6. WAVEFORM 2


      1. A01SI3LE87
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        CAN communication signal

        Item Content
        Tester Connection

        • Q4-11 (CA1N) - Q4-10 (GND)

        • Q4-12 (CANL) - Q4-10 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Ignition switch ON

        Tech Tips

        The waveform varies depending on the CAN communication signal.