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Terminals Of Ecu

  1. DISTANCE CONTROL ECU 
    Fig 1: Identifying Terminals Of ECU (Distance Control ECU)
    G04494772Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    DISTANCE CONTROL ECU

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    D2-1 - D2-12 (B - GND) B-R - BR Always 10 to 14 V
    D2-2 - D2-12 (WIP2 - GND) L-O - BR Ignition switch ON
    Wiper switch OFF -> HI    		 Below 1 V -> 10 to 14 V
    D2-3 - D2-12 (WASH - GND) L-Y - BR Ignition switch ON
    Washer switch OFF -> ON    		 10 to 14 V -> Below 1 V
    D2-10 - Body ground (SGND - Body ground) BR - Body ground Always Below 1 Ω
    D2-12 - Body ground (GND - Body ground) BR - Body ground Always Below 1 Ω
    D2-13 - D2-12 (IGB - GND) W-L - BR Ignition switch ON 10 to 14 V
    D2-16 - D2-12 (MODE - GND) W - BR Ignition switch ON
    Distance control switch OFF -> ON    		 10 to 14 V -> Below 1 V
    D2-22 - D2-12 (LRDD - GND) G - BR Ignition switch ON Pulse generation (*1)
    D2-23 - D2-12 (LRRD - GND) Y - BR Ignition switch ON Pulse generation (*2)
    D2-24 - D2-12 (ELC - GND) B-W - BR Ignition switch ON Pulse generation (*3)
    D2-25 - D2-12 (LCS - GND) W-R - BR Ignition switch ON Pulse generation (*4)
    1. Reference: Oscilloscope waveform (*1)

      HINT:

      • Terminal: LRDD - GND
      • Gauge set: 2 V/DIV, 10 ms/DIV
      • Condition: Ignition switch ON
        Fig 2: Identifying Waveform (*1)
        G04494773Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reference: Oscilloscope waveform (*2)

      HINT:

      • Terminal: LRRD - GND
      • Gauge set: 2 V/DIV, 5 ms/DIV
      • Condition: Ignition switch ON
        Fig 3: Identifying Waveform (*2)
        G04494774Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Reference: Oscilloscope waveform (*3)

      HINT:

      • Terminal: ELC - GND
      • Gauge set: 2 V/DIV, 5 ms/DIV
      • Condition: Ignition switch ON
        Fig 4: Identifying Waveform (*3)
        G04494775Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Reference: Oscilloscope waveform (*4)

      HINT:

      • Terminal: LCS - GND
      • Gauge set: 2 V/DIV, 5 ms/DIV
      • Condition: Ignition switch ON
        • Fig 5: Identifying Waveform (*4)
        G04494776Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. ECM 
    Fig 6: Identifying Terminals Of ECU (ECM)
    G04494777Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECM

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    E1 - Body ground (E6-1 - Body ground) BR - Body ground Always Below 1 Ω
    LGND - Body ground (E6-18 - Body ground) Y - Body ground Always Below 1 Ω
    LCS - E1 (E6-19 - E6-1) W-R - BR Ignition switch ON Pulse generation (*1)
    CCHG - E1 (E6-28 - E6-1) P - BR Ignition switch ON
    Cruise control main switch ON
    MODE switch ON    		 Below 1 V
    Ignition switch ON
    Cruise control main switch ON
    MODE switch OFF    		 10 to 14 V
    ELC - E1 (E6-29 - E6-1) B-W - BR Ignition switch ON Pulse generation (*2)
    ST1- - E1 (E5-12 - E6-1) LG-R - BR Brake pedal depressed (Stop light switch ON) Below 1 V
    Brake pedal released (Stop light switch OFF) 10 to 14 V
    SPD - E1 (E5-17 - E6-1) V-W - BR Engine start -> Car stoppage Below 1.5 V -> 4.7 to 16 V
    During driving (Pulse generated) 3 to 7 V
    STP - E1 (E5-19 - E6-1) G-W - BR Brake pedal released (Stop light switch OFF) Below 1 V
    Brake pedal depressed (Stop light switch ON) 10 to 14 V
    CCS - E1 (E5-24 - E6-1) B - BR Ignition switch ON
    CANCEL switch ON
    -/SET switch ON
    +/RES switch ON
    Main switch ON    		 10 to 16 V
    6.6 to 10.1 V
    4.5 to 7.1 V
    2.3 to 4.0 V
    Below 1 V
    ENG+ - ENG- (E4-24 - E4-30) P - V Ignition switch ON Pulse generation
    TRC+ - TRC- (E4-25 - E4-31) LG-B - LG-R Ignition switch ON Pulse generation

    If the values is not within the standard range, some defect on the vehicle is suspected.

    1. Reference: Oscilloscope waveform (*1)

      HINT:

      • Terminal: LCS - E1
      • Gauge set: 1 V/DIV, 20 ms/DIV
      • Condition: Ignition switch ON
        Fig 7: Identifying Waveform (*1)
        G04494778Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reference: Oscilloscope waveform (*2)

      HINT:

      • Terminal: ELC - E1
      • Gauge set: 1 V/DIV, 20 ms/DIV
      • Condition: Ignition switch ON
        Fig 8: Identifying Waveform (*2)
        G04494779Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. LASER RADAR SENSOR 
    Fig 9: Identifying Terminals Of ECU (Laser Radar Sensor)
    G04494780Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    LASER RADAR SENSOR

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    LGND - Body ground (L1-1 - Body ground) R - Body ground Always Below 1 Ω
    SGND - Body ground (L1-2 - Body ground) BR - Body ground Always Below 1 Ω
    LRDD - SGND (L1-3 - L1-2) G - BR Ignition switch ON Pulse generation (*1)
    LRRD - SGND (L1-4 - L1-2) Y - BR Ignition switch ON Pulse generation (*2)
    IGB - SGND (L1-5 - L1-2) W-L - BR Ignition switch ON 10 to 14 V
    1. Reference: Oscilloscope waveform (*1)

      HINT:

      • Terminal: LRDD - SGND
      • Gauge set: 1 V/DIV, 2 ms/DIV
      • Condition: Ignition switch
        Fig 10: Identifying Waveform (*1)
        G04494781Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reference: Oscilloscope waveform (*2)

      HINT:

      • Terminal: LRRD - SGND
      • Gauge set: 1 V/DIV, 2 ms/DIV
      • Condition: Ignition switch ON
        Fig 11: Identifying Waveform (*2)
        G04494782Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) 
    Fig 12: Identifying Terminals Of ECU (Brake Actuator Assembly (Skid Control ECU)
    G04494783Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU)

    Symbols (Terminal No.) Wiring Color Condition Specified Condition
    BZ (S3-30) - GND1 (S3 - 32) G-O - W-B Ignition switch ON
    Skid control buzzer is sounded    		 Below 1.0 V <--> 10 to 14 V
    Ignition switch ON
    Skid control buzzer is not sounded    		 10 to 14 V
    ENG+ (S3 - 9) - ENG- (S3 - 23) P - V Ignition switch ON Pulse generation
    TRC+ (S3 - 8) - TRC- (S3 - 22) LG-B - LG-R Ignition switch ON Pulse generation
    STPO (S3 - 16) - GND1- (S3 - 32) W-R - W-B Ignition switch ON 10 to 14 V
    STP2 (S3 - 21) - GND1 (S3 - 32) G-Y - W-B Brake pedal released (Stop light switch OFF) Below 1.0 V
    Brake pedal depressed (Stop light switch ON) 10 to 14 V
    STP1 (S3 - 27) - GND1 (S3 - 32) G-W - W-B Ignition switch OFF -> ON Below 1.0 V -> 10 to 14 V
    Ignition switch OFF
    Brake pedal depressed (Stop light switch ON)    		 10 to 14 V
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