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Terminals Of Ecu

  1. CHECK DISTANCE CONTROL ECU 
    Fig 1: Identifying Distance Control ECU Connector Terminal J17
    G05750597Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CONNECTOR TERMINAL REFERENCE CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    J17-1 (B) - J17-12 (GND) B - BR Battery Always 10 to 14 V
    J17-8 (CANH) - J17-12 (GND) GR - BR CAN communication signal CAN communication circuit Pulse generation
    J17-9 (CANL) - J17-12 (GND) W - BR CAN communication signal CAN communication circuit Pulse generation
    J17-10 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω
    J17-12 (GND) - Body ground BR - Body ground Ground Always Below 1 Ω
    J17-13 (IGB) - J17-12 (GND) P - BR Engine switch on signal Engine switch off Below 1 V
    J17-13 (IGB) - J17-12 (GND) P - BR Engine switch on signal Engine switch on (IG) 10 to 16 V
    J17-22 (LRDD) - J17-10 (SGND) O - BR Millimeter wave radar sensor input signal Engine switch on (IG) Pulse generation (see  awaveform 1)
    J17-23 (LRRD) - J17-10 (SGND) L - BR Millimeter wave radar sensor output signal Engine switch on (IG) Pulse generation (see  bwaveform 2)
    J17-16 (MODE) - J17-12 (GND) R - BR Steering pad switch signal (Distance control switch signal) Engine switch on (IG), Steering pad switch signal ON 0 to 2 V
    J17-16 (MODE) - J17-12 (GND) R - BR Steering pad switch signal (Distance control switch signal) Engine switch on (IG), Steering pad switch signal OFF 10 to 16 V
    1. Reference: waveform 1

      HINT:

      • Terminal: LRDD - SGND
      • Gauge set: 2 V/DIV., 10 msec./DIV.
      • Condition: Engine switch on (IG)
        Fig 2: Identifying Waveform 1
        G05252184Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reference: waveform 2

      HINT:

      • Terminal: LRRD - SGND
      • Gauge set: 2 V/DIV., 5 msec./DIV.
      • Condition: Engine switch on (IG)
        • Fig 3: Identifying Waveform 2
        G05252185Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK ECM 
    Fig 4: Identifying ECM Connector E4, A5 And A6
    G05831945Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CONNECTOR TERMINAL REFERENCE CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    A6-4 (STP) - E4-7 (E1) R-B - BR Stop light signal Brake pedal released (Stop light switch off) Below 1 V
    A6-4 (STP) - E4-7 (E1) R-B - BR Stop light signal Brake pedal depressed (Stop light switch on) 10 to 14 V
    A6-31 (CCS) - E4-7 (E1) L-B - BR Cruise control main switch signal Engine switch on (IG) 10 to 14 V
    A6-31 (CCS) - E4-7 (E1) L-B - BR Cruise control main switch signal CANCEL switch on 6.6 to 10.1 V
    A6-31 (CCS) - E4-7 (E1) L-B - BR Cruise control main switch signal - (COAST)/SET switch on 4.5 to 7.1 V
    A6-31 (CCS) - E4-7 (E1) L-B - BR Cruise control main switch signal + (ACCEL)/RES (RESUME) switch on 2.3 to 4.0 V
    A6-31 (CCS) - E4-7 (E1) L-B - BR Cruise control main switch signal Main switch on Below 1 V
    A5-8 (ST1-) - E4-7 (E1) G-W - BR Stop light signal Engine switch on (IG), Brake pedal depressed (Stop light switch on) Below 1 V
    A5-8 (ST1-) - E4-7 (E1) G-W - BR Stop light signal Engine switch on (IG), Brake pedal released (Stop light switch off) 10 to 14 V
    A5-20 (CCHG) - E4-7 (E1) B-L - BR Distance control switch signal Engine switch on (IG), Cruise control main switch on, MODE switch on Below 1 V
    A5-20 (CCHG) - E4-7 (E1) B-L - BR Distance control switch signal Engine switch on (IG), Cruise control main switch on, MODE switch off 10 to 14 V
    *1 A5-9 (LGND) - Body ground
    *2 A5-29 (LGND) - Body ground    		 B - Body ground Ground Always Below 1 Ω
    E4-7 (E1) - Body ground BR - Body ground Ground Always Below 1 Ω
    HINT:
    • 2GR-FSE (*1)
    • 4GR-FSE (*2)

    If the value is not within the specified range, the ECM may have a malfunction.

  3. CHECK MILLIMETER WAVE RADAR SENSOR 
    Fig 5: Identifying Millimeter Wave Radar Sensor Connector B9
    G05831946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CONNECTOR TERMINAL REFERENCE CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    B9-1 (LGND) - Body ground B - Body ground Ground (Distance signal) Always Below 1 Ω
    B9-2 (SGND) - Body ground BR - Body ground Ground Always Below 1 Ω
    B9-3 (LRDD) - B9-2 (SGND) L-B - BR Millimeter wave radar sensor output signal Engine switch on (IG) Pulse generation (see  awaveform 1)
    B9-4 (LRRD) - B9-2 (SGND) LG - BR Millimeter wave radar sensor input signal Engine switch on (IG) Pulse generation (see  bwaveform 2)
    B9-5 (IGB) - B9-2 (SGND) P - BR Power source Engine switch on (IG) 10 to 14 V
    1. Reference: waveform 1

      HINT:

      • Terminal: LRDD - SGND
      • Gauge set: 2 V/DIV., 10 msec./DIV.
      • Condition: Engine switch on (IG)
        Fig 6: Identifying Waveform 1
        G05252184Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reference: waveform 2

      HINT:

      • Terminal: LRRD - SGND
      • Gauge set: 2 V/DIV., 5 msec./DIV.
      • Condition: Engine switch on (IG)
        Fig 7: Identifying Waveform 2
        G05252185Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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