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Terminals Of Ecu

  1. CHECK DISTANCE CONTROL ECU 
    Fig 1: Checking Distance Control ECU
    G04049234Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL SPECIFICATION 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 1Ω
    J17-12 (GND) - Body ground BR - Body ground Ground Always Below 1Ω
    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 waveform 1)
    J17-23 (LRRD) - J17-10 (SGND) L - BR Millimeter wave radar sensor output signal Engine switch on (IG) Pulse generation (see waveform 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 Reference Voltage Waveform
      G04024034Courtesy 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)
  2. CHECK ECM SGND 
    Fig 3: Identifying Reference Voltage Waveform
    G04049263Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Checking ECM Connector Terminals
    G04049237Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL SPECIFICATION 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) R-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) R-L - BR Distance control switch signal Engine switch on (IG), Cruise control main switch on, MODE switch off 10 to 14 V
    (1)1A5-9 (LGND) - Body ground
    (2)A5-29 (LGND) - Body ground    		 L-B - Body ground Ground Always Below 1Ω
    E4-7 (E1) - Body ground BR - Body ground Ground Always Below 1Ω
    HINT:

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

  3. CHECK MILLIMETER WAVE RADAR SENSOR 
    Fig 5: Checking Millimeter Wave Radar Sensor Connector Terminals
    G04049238Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL SPECIFICATION CHART

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    B9-1 (LGND) - Body ground B - Body ground Ground (Distance signal) Always Below 1Ω
    B9-2 (SGND) - Body ground BR - Body ground Ground Always Below 1Ω
    B9-3 (LRDD) - B9-2 (SGND) L-B - BR Millimeter wave radar sensor output signal Engine switch on (IG) Pulse generation (see waveform 1)
    B9-4 (LRRD) - B9-2 (SGND) LG - BR Millimeter wave radar sensor input signal Engine switch on (IG) Pulse generation (see waveform 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 Reference Voltage Waveform
      G04024034Courtesy 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 Reference Voltage Waveform
G04049263Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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