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Terminals Of Ecu

  1. DISTANCE CONTROL ECU 
    Fig 1: Identifying ECU Terminals
    G03003777Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    ECU TERMINALS VOLTAGE AND RESISTANCE SPECIFICATION

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    +B - GND (D2-1 - D2-12) R-B - BR Battery Always 10 to 14V
    CANH (D2 - 8) LG CAN communication signal CAN communication circuit -
    CANL (D2 - 9) L CAN communication signal CAN communication circuit -
    SGND - Body ground (D2-10 - Body ground) BR - Body ground Ground Always Below 1 Ω
    GND - Body ground (D2-12 - Body ground) BR - Body ground Ground Always Below 1Ω
    IGB - GND (D2-13 - D2-12) L-0 - BR Ignition switch ON signal Ignition switch OFF --> ON Below 1 V --> 10 to 14V
    LRDD - GND (D2-22 - D2-12) P-L - BR Millimeter wave radar sensor input signal Ignition switch ON Pulse generation (see waveform 1)
    LRRD - GND (D2-23 - D2-12) L-Y - BR Millimeter wave radar sensor output signal Ignition switch ON Pulse generation (see waveform 2)
    1. Reference: waveform 1

      HINT:

      • Terminal: LRDD - GND
      • Gauge set: 2 V/DIV, 10 ms/DIV
      • Condition: Ignition switch ON
      Fig 2: Signal Waveform Graph (Waveform 1)
      G03003778Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Reference: waveform 2

      HINT:

      • Terminal: LRRD - GND
      • Gauge set: 2 V/DIV, 5 ms/DIV
      • Condition: Ignition switch ON
      Fig 3: Signal Waveform Graph (Waveform 2)
      G03003779Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
  2. ECM 
    Fig 4: Identifying ECM Connector Terminals
    G03003780Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    Fig 5: ECM Connector Terminals Voltage And Resistance Chart
    G03003781Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    If the value is not within the standard range, some defects on the vehicle are suspected.

  3. MILLIMETER WAVE RADAR SENSOR 
    Fig 6: Identifying Millimeter Wave Radar Sensor Connector Terminals
    G03003782Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    MILLIMETER WAVE RADAR SENSOR CONNECTOR TERMINALS VOLTAGE AND RESISTANCE SPECIFICATION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    LGND - Body ground (M7-1 - Body ground) B-L -Body ground Ground (Distance signal) Always Below 1 Ω
    SGND - Body ground (M7-2 - Body ground) B-R - Body ground Ground Always Below 1 Ω
    LRDD - SGND (M7-3 - M7-2) B-O - B-R Millimeter wave radar sensor output signal Ignition switch ON Pulse generation (see waveform 1)
    LRRD - SGND (M7-4 - M7-2) B-Y - B-R Millimeter wave radar sensor input signal Ignition switch ON Pulse generation (see waveform 2)
    IGB - SGND (M7-5 - M7-2) B - B-R Power source Ignition switch ON 10 to 14V
    1. Reference: waveform 1

      HINT:

      • Terminal: LRDD - SGND
      • Gauge set: 1 V/DIV, 2 ms/DIV
      • Condition: Ignition switch ON
      Fig 7: Signal Waveform Graph (Waveform 1)
      G03003783Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
    2. Reference: waveform 2

      HINT:

      • Terminal: LRRD - SGND
      • Gauge set: 1 V/DIV, 2 ms/DIV
      • Condition: Ignition switch ON
      Fig 8: Signal Waveform Graph (Waveform 2)
      G03003784Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
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