DYNAMIC RADAR CRUISE CONTROL SYSTEM TERMINALS OF ECU


  1. CHECK DRIVING SUPPORT ECU ASSEMBLY

    B003UMNE20

    1. Disconnect the M1 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
      M1-6 (SPSW) - M1-25 (GND) W - BR Steering pad switch assembly signal (distance control signal) Engine switch on (IG), Steering pad switch assembly (distance control switch) off 11 to 14 V
      Engine switch on (IG), Steering pad switch assembly (distance control switch) on 6 to 7 V
      M1-10 (CCHG) - M1-25 (GND) L - BR Cruise control switch circuit Engine switch on (IG), Cruise control switch on, MODE switch off 11 to 14 V
      Engine switch on (IG), Cruise control switch on, MODE switch on Below 1 V
      M1-23 (CCS) - M1-25 (GND) B - BR Cruise control switch circuit Cruise control switch off 1 MΩ or higher
      Cruise control switch ON Below 2.5 Ω
      +/RES switch ON 235 to 245 Ω
      -/SET switch ON 617 to 643 Ω
      CANCEL switch ON 1509 to 1571 Ω
      M1-25 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
      M1-27 (STP-) - M1-25 (GND) R - BR Stop light switch assembly signal Brake pedal released Below 1.5 V
      Brake pedal depressed 7.5 to 14 V
      M1-28 (ST1-) - M1-25 (GND) P - BR Stop light switch assembly signal (opposite to STP terminal) Engine switch on (IG), Brake pedal released 7.5 to 14 V
      Engine switch on (IG), Brake pedal depressed Below 1.5 V
      M1-30 (B) - M1-25 (GND) B - BR Power source Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      M1-32 (WIP2) - M1-25 (GND) B - BR Wiper switch signal Engine switch on (IG), Wiper switch off Below 1 V
      Engine switch on (IG), Wiper switch LO position 6 to 7 V
      Engine 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 M1 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
      M1-6 (SPSW) - M1-25 (GND) W - BR Steering pad switch assembly signal (distance control signal) Engine switch on (IG), Steering pad switch assembly (distance control switch) off 11 to 14 V
      Engine switch on (IG), Steering pad switch assembly (distance control switch) on 6 to 7 V
      M1-10 (CCHG) - M1-25 (GND) L - BR Cruise control switch circuit Engine switch on (IG), Cruise control switch on, MODE switch off 11 to 14 V
      Engine switch on (IG), Cruise control switch on, MODE switch on Below 1 V

    5. Check the pulse according to the value(s) in the table below.

      Terminal No. (Symbols) Wiring Color Terminal Description Condition Specified Condition
      M1-17 (CA2L) - M1-25 (GND) B - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 1)
      M1-18 (CA1N) - M1-25 (GND) G - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 2)
      M1-39 (CA2H) - M1-25 (GND) G - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 3)
      M1-40 (CA1P) - M1-25 (GND) B - BR CAN communication signal Engine switch on (IG)

      Pulse generation

      (See waveform 4)
    6. B003UCJE01

      Waveform 1


      1. CAN communication signal

        Item Content
        Tester Connection M1-17 (CA2L) - M1-25 (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. B003UCJE01

      Waveform 2


      1. CAN communication signal

        Item Content
        Tester Connection M1-18 (CA1N) - M1-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)
    8. B003TCSE01

      Waveform 3


      1. CAN communication signal

        Item Content
        Tester Connection M1-39 (CA2H) - M1-25 (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.

    9. B003TCSE01

      Waveform 4


      1. CAN communication signal

        Item Content
        Tester Connection M1-40 (CA1P) - M1-25 (GND)
        Tool Setting 1 V/DIV., 10 μsec./DIV.
        Condition Engine switch on (IG)