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Terminals Of Ecu

  1. CHECK DISTANCE CONTROL ECU 
    Fig 1: Identifying D2 Connector Terminals Of ECU
    G05279892Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SYMBOLS AND TERMINAL SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    D2-1 (+B) + D2-12 (GND) B - G Battery Always 10 to 14 V
    D2-2 (WIP2) - D2-12 (GND) W - G Wiper switch signal Ignition switch: ON, Wiper switch: OFF → HI Below 1 V → 10 to 14 V
    D2-3 (WASH) - D2-12 (GND) B - G Washer switch signal Ignition switch: ON, Washer switch: OFF → ON 10 to 14 V → Below 1 V
    D2-10 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω
    D2-12 (GND) - Body ground G - Body ground Ground Always Below 1 Ω
    D2-13 (IGB) - D2-12 (GND) V - G Ignition switch on signal Ignition switch: ON 10 to 14 V
    D2-16 (MODE) - D2-12 (GND) Y - G Distance control switch signal Ignition switch: ON, Distance control switch: OFF → ON 10 to 14 V → Below 1 V
    D2-22 (LRDD) - D2-12 (GND) B - G Laser sensor input signal Ignition switch: ON Pulse generation (see  a waveform 1)
    D2-23 (LRRD) - D2-12 (GND) W - G Laser sensor output signal Ignition switch: ON Pulse generation (see  b waveform 2)
    1. Reference: waveform 1

      HINT:

      • Terminal: LRDD - GND
      • Gauge set: 2 V/DIV, 10 msec./DIV
      • Condition: Ignition switch ON
      Fig 2: Identifying Waveform 1
      G05279893Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reference: waveform 2

      HINT:

      • Terminal: LRRD - GND
      • Gauge set: 2 V/DIV, 5 msec./DIV
      • Condition: Ignition switch ON
  2. CHECK HYBRID VEHICLE CONTROL ECU 
    Fig 3: Identifying Waveform 2
    G05005578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Identifying Terminals Of H29 And H31 Connectors
    G05279895Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SYMBOLS AND TERMINAL SPECIFIED CONDITION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    H31-5 (E1) - Body ground BR - Body ground Ground Always Below 1 Ω
    H29-11 (LGND) - Body ground Y - Body ground Ground Always Below 1 Ω
    H29-18 (CCHG) - H31-5 (E1) GR - BR Distance control switch signal Ignition switch: ON, Cruise control main switch: ON, MODE switch: ON Below 1 V
    H29-18 (CCHG) - H31-5 (E1) GR - BR Distance control switch signal Ignition switch: ON, Cruise control main switch: ON, MODE switch: OFF 10 to 14 V
    H29-25 (ST1-) - H31-5 (E1) LG - BR Stop light signal Brake pedal depressed (Stop light switch: ON) Below 1 V
    H29-25 (ST1-) - H31-5 (E1) LG - BR Stop light signal Brake pedal depressed (Stop light switch: OFF) 10 to 14 V
    H29-24 (SPDI) - H31-5 (E1) LG - BR Vehicle speed signal Engine start → Car stoppage Below 1.5 V → 4.7 to 16 V
    H29-24 (SPDI) - H31-5 (E1) LG - BR Vehicle speed signal During pedal released (Pulse generated) 3 to 7V
    H29-31 (STP) - H31-5 (E1) O - BR Stop light signal Brake pedal released (Stop light switch: OFF) Below 1 V
    H29-31 (STP) - H31-5 (E1) O - BR Stop light signal Brake pedal depressed (Stop light switch: ON) 10 to 14 V
    H29-26 (CCS) - H31-5 (E1) P - BR Cruise control main switch signal Ignition switch: ON 10 to 16 V
    H29-26 (CCS) - H31-5 (E1) P - BR Cruise control main switch signal CANCEL switch: ON 6.6 to 10.1 V
    H29-26 (CCS) - H31-5 (E1) P - BR Cruise control main switch signal -/SET switch: ON 4.5 to 7.1 V
    H29-26 (CCS) - H31-5 (E1) P - BR Cruise control main switch signal +/RES switch: ON 2.3 to 4.0 V
    H29-26 (CCS) - H31-5 (E1) P - BR Cruise control main switch signal Main switch: ON Below 1 V

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

  3. CHECK LASER SENSOR 
    Fig 5: Identifying Terminals Of Laser Sensor
    G05279896Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SYMBOLS AND TERMINAL SPECIFIED CONDITION

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    L1-1 (LGND) - Body ground BR - Body ground Distance signal Always Below 1 Ω
    L1-2 (SGND) - Body ground Y - Body ground Ground Always Below 1 Ω
    L1-3 (LRDD) - L1-2 (SGND) B - Y Laser sensor output signal Ignition switch: ON Pulse generation (see  a waveform 1)
    L1-4 (LRRD) - L1-2 (SGND) W - Y Laser sensor input signal Ignition switch: ON Pulse generation (see  b waveform 2)
    L1-5 (IGB) - L1-2 (SGND) V - Y Ignition switch signal Ignition switch: ON 10 to 14 V
    1. Reference: waveform 1

      HINT:

      • Terminal: LRDD - SGND
      • Gauge set: 2 V/DIV, 10 msec./DIV
      • Condition: Ignition switch ON
      Fig 6: Identifying Waveform 1
      G05279893Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reference: waveform 2

      HINT:

      • Terminal: LRRD - SGND
      • Gauge set: 2 V/DIV, 5 msec./DIV
      • Condition: Ignition switch ON
      Fig 7: Identifying Waveform 2
      G05005578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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