PRE-CRASH SAFETY SYSTEM TERMINALS OF ECU


  1. CHECK DRIVING SUPPORT ECU ASSEMBLY

    B005ABDN20

    1. Disconnect the I19 driving support ECU assembly connector.

      Note

      If a load of more than 10 kg (22 lb) is placed on the connector, it may break. Do not place more load than is necessary on the 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
      I19-5 (PBSW) - Body ground G - Body ground Pre-crash safety system switch signal Pre-crash safety system switch on Below 1 Ω
      Pre-crash safety system switch off 10 kΩ or higher
      I19-25 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      I19-30 (B) - Body ground

      Y - Body ground*1

      LG - Body ground*2

      		 Power source Engine switch on (IG) 11 to 14 V*1
      10.5 to 16 V*2
      Engine switch off Below 1 V

      *1: w/o Stop and Stat System

      *2: w/ Stop and Stat System

      Tech Tips

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

    3. Reconnect the I19 driving support ECU assembly connector.

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

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I19-17 (CA2L) - I19-25 (GND) W - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      I19-18 (CA1N) - I19-25 (GND) B - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      I19-39 (CA2H) - I19-25 (GND) V - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 3)
      I19-40 (CA1P) - I19-25 (GND) L - W-B CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 4)
    5. B0059KNE01

      Waveform 1


      1. CAN communication signal

        Item Content
        Tester Connection I19-17 (CA2L) - I19-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    6. B0059KNE01

      Waveform 2


      1. CAN communication signal

        Item Content
        Tester Connection I19-18 (CA1N) - I19-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    7. B005A92E01

      Waveform 3


      1. CAN communication signal

        Item Content
        Tester Connection I19-39 (CA2H) - I19-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    8. B005A92E01

      Waveform 4


      1. CAN communication signal

        Item Content
        Tester Connection I19-40 (CA1P) - I19-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.