PRE-CRASH SAFETY SYSTEM TERMINALS OF ECU


  1. CHECK DRIVING SUPPORT ECU ASSEMBLY

    A01MJM5E51

    1. Disconnect the G72 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
      G72-5 (PBSW) - Body ground B - Body ground Pre-crash system cancel switch assembly signal Pre-crash system cancel switch assembly on Below 1 Ω
      Pre-crash system cancel switch assembly off 10 kΩ or higher
      G72-25 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G72-30 (B) - Body ground G - Body ground Power source Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V

      Tech Tips

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

    3. Reconnect the G72 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
      G72-17 (CA2L) - G72-25 (GND) W - W-B CAN communication signal Power switch on (IG)

      Pulse generation

      (See waveform 1)
      G72-18 (CA1N) - G72-25 (GND) W - W-B CAN communication signal Power switch on (IG)

      Pulse generation

      (See waveform 2)
      G72-39 (CA2H) - G72-25 (GND) BR - W-B CAN communication signal Power switch on (IG)

      Pulse generation

      (See waveform 3)
      G72-40 (CA1P) - G72-25 (GND) B - W-B CAN communication signal Power switch on (IG)

      Pulse generation

      (See waveform 4)
    5. A01MGAAE01

      Waveform 1


      1. CAN communication signal

        Item Content
        Tester Connection G72-17 (CA2L) - G72-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Power switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    6. A01MGAAE01

      Waveform 2


      1. CAN communication signal

        Item Content
        Tester Connection G72-18 (CA1N) - G72-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Power switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    7. A01MJLBE01

      Waveform 3


      1. CAN communication signal

        Item Content
        Tester Connection G72-39 (CA2H) - G72-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Power switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    8. A01MJLBE01

      Waveform 4


      1. CAN communication signal

        Item Content
        Tester Connection G72-40 (CA1P) - G72-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Power switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.