LANE DEPARTURE ALERT 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 Q4 forward recognition camera connector.


    1. Disconnect the Q4 forward recognition camera connector.

      A01SI3IE02

    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
      Q4-3 (LKSW) - Q4-10 (GND) GR - B Lane departure alert main switch signal Lane departure alert main switch being pressed Below 1 Ω
      Lane departure alert main switch 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

    3. Reconnect the Q4 forward recognition camera connector.

      A01SGUIC14
      *a

      Component with harness connected

      (Forward Recognition Camera)

      		 - -

    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
      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)

      1. B0027KGE10
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        Waveform 1

        Item Content
        Terminal Name

        Between Q4-5 (CA1P) and Q4-10 (GND)

        Between Q4-6 (CANH) and 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.

      2. A01SIUFE13
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        Waveform 2

        Item Content
        Terminal Name

        Between Q4-11 (CA1N) and Q4-10 (GND)

        Between Q4-12 (CANL) and 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.