LANE DEPARTURE ALERT SYSTEM(w/ Steering Control) 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 S18 forward recognition camera connector.

    B0002OBE71

    1. Disconnect the S18 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
      S18-7 (IGB) - S18-10 (GND) P - BR Power source Engine switch on (IG)

      11 to 14 V*1

      10.5 to 16 V*2
      Engine switch off Below 1 V
      S18-10 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω

      *1: w/o Stop and Start System

      *2: w/ Stop and Start System

    3. Reconnect the S18 forward recognition camera connector.

    4. Measure the waveform according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      S18-2 (STRV) - S18-10 (GND) GR - BR LIN communication signal Engine switch on (IG) Pulse generation

    5. 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
      S18-5 (CA1P) - S18-10 (GND) R - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      S18-11 (CA1N) - S18-10 (GND) B - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      S18-6 (CANH) - S18-10 (GND) GR - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      S18-12 (CANL) - S18-10 (GND) B - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)

      1. B0002FSE97
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        WAVEFORM 1

        Item Content
        Terminal Name

        Between S18-5 (CA1P) and S18-10 (GND)

        Between S18-6 (CANH) and S18-10 (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. B0002NUE89
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        WAVEFORM 2

        Item Content
        Terminal Name

        Between S18-11 (CA1N) and S18-10 (GND)

        Between S18-12 (CANL) and S18-10 (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. CHECK DRIVING SUPPORT ECU ASSEMBLY

    B003WF3E40

    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
      M2-7 (B) - M2-28 (GND) B - BR Power source Engine switch on (IG)

      11 to 14 V*1

      10.5 to 16 V*2
      Engine switch off Below 1 V
      M2-23 (SPSW) - M2-28 (GND) W - BR

      Steering pad switch signal

      (Lane departure alert main switch signal)

      Engine switch off

      Lane departure alert main switch off

      		 1 MΩ or higher

      Engine switch off

      Lane departure alert main switch on

      		 228 to 252 Ω
      M2-28 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω

      *1: w/o Stop and Start System

      *2: w/ Stop and Start System

    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
      M2-8 (CA1P) - M2-28 (GND) G - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      M2-9 (CA1N) - M2-28 (GND) B - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      M2-10 (CA2H) - M2-28 (GND) G - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      M2-11 (CA2L) - M2-28 (GND) B - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)

      1. B0002FSE97
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        WAVEFORM 1

        Item Content
        Terminal Name

        Between M2-8 (CA1P) - M2-28 (GND)

        Between M2-10 (CA2H) - M2-28 (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. B0002NUE89
        *a 1 V/DIV.
        *b 10 μsec./DIV.

        WAVEFORM 2

        Item Content
        Terminal Name

        Between M2-9 (CA1N) - M2-28 (GND)

        Between M2-11 (CA2L) - M2-28 (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.

  3. CHECK STEERING VIBRATION ECU

    B0002KPE14

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

      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      z18-4 (IG) - z18-1 (GND) Power source Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      B-1 (M+) - z18-1 (GND) Steering vibration operation signal

      Engine switch on (IG)

      Steering vibration operating

      		 Pulse generation

      Engine switch on (IG)

      Steering vibration not operating

      		 Below 1 V
      z18-1 (GND) - Body ground Ground Always Below 1 Ω

    2. Measure the waveform according to the value(s) in the table below.

      Terminal No. (Symbol) Terminal Description Condition Specified Condition
      A-2 (LDA) - z18-1 (GND) LIN communication signal Engine switch on (IG) Pulse generation