DYNAMIC RADAR CRUISE CONTROL SYSTEM TERMINALS OF ECU


  1. CHECK DRIVING SUPPORT ECU ASSEMBLY

    A01MJM5N39

    1. Disconnect the G72 driving support ECU assembly connector.

      Note

      Do not apply excessive force to the connector. If a force of 10 kg or more is applied, the connector may be broken.

    2. Measure the resistance and voltage on the wire harness side connector according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G72-6 (SPSW) - G72-25 (GND) V - W-B Steering pad switch assembly signal (distance control signal) Power switch on (IG), steering pad switch assembly (distance control switch) off 11 to 14 V
      Power switch on (IG), steering pad switch assembly (distance control switch) on 6 to 7 V
      G72-10 (CCHG) - G72-25 (GND) W - W-B Cruise control switch circuit Power switch on (IG), cruise control main switch on, MODE switch off 11 to 14 V
      Power switch on (IG), cruise control main switch on, MODE switch on Below 1 V
      G72-23 (CCS) - G72-25 (GND) L - W-B Cruise control switch circuit Cruise control main switch off 1 MΩ or higher
      Cruise control main switch on Below 2.5 Ω
      +RES switch ON 236 to 244 Ω
      -SET switch ON 618 to 642 Ω
      CANCEL switch ON 1510 to 1570 Ω
      G72-25 (GND) - Body ground W-B - Body ground Ground Always Below 1 Ω
      G72-27 (STP-) - G72-25 (GND) LG - W-B Stop light switch assembly signal Brake pedal released Below 1.5 V
      Brake pedal depressed 7.5 to 14 V
      G72-28 (ST1-) - G72-25 (GND) GR - W-B Stop light switch assembly signal (opposite to STP terminal) Power switch on (IG), brake pedal released 7.5 to 14 V
      Power switch on (IG), brake pedal depressed Below 1.5 V
      G72-30 (B) - G72-25 (GND) G - W-B Power source Power switch on (IG) 11 to 14 V
      Power switch off Below 1 V
      G72-32 (WIP2) - G72-25 (GND) R - W-B Wiper switch signal Power switch on (IG), wiper switch off Below 1 V
      Power switch on (IG), wiper switch LO position 6 to 7 V
      Power switch on (IG), wiper switch HI position 11 to 14 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. Measure the voltage on the wire harness side connector according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      G72-6 (SPSW) - G72-25 (GND) V - W-B Steering pad switch assembly signal (distance control signal) Power switch on (IG), steering pad switch assembly (distance control switch) off 11 to 14 V
      Power switch on (IG), steering pad switch assembly (distance control switch) on 6 to 7 V
      G72-10 (CCHG) - G72-25 (GND) W - W-B Cruise control switch circuit Power switch on (IG), cruise control main switch on, MODE switch off 11 to 14 V
      Power switch on (IG), cruise control main switch on, MODE switch on Below 1 V

    5. Check the pulse 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)
    6. 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.

    7. 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)
    8. 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.

    9. 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)