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Terminals Of Ecu

WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DISTANCE CONTROL ECU 
    Fig 1: Identifying D2 ECU Connector Terminals
    G05140629Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU TERMINAL REFERENCE TABLE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    D2-1 (B) - D2-12 (GND) BR - R Battery Always 10 to 14 V
    D2-8 (CANH) - D2-12 (GND) G - R CAN communication signal CAN communication circuit Pulse generation
    D2-9 (CANL) - D2-12 (GND) W - R CAN communication signal CAN communication circuit Pulse generation
    D2-10 (SGND) - Body ground L - Body ground Ground Always Below 1 Ω
    D2-12 (GND) - Body ground R - Body ground Ground Always Below 1 Ω
    D2-13 (IGB) - D2-12 (GND) V - BR Ignition switch on signal Ignition switch off Below 1 V
    D2-13 (IGB) - D2-12 (GND) V - BR Ignition switch on signal Ignition switch on 10 to 14 V
    D2-22 (LRDD) - D2-10 (SGND) B - L Laser sensor input signal Ignition switch on Pulse generation (see  a waveform 1)
    D2-23 (LRRD) - D2-10 (SGND) W - L Laser sensor output signal Ignition switch on Pulse generation (see  b waveform 2)
    D2-16 (MODE) - D2-12 (GND) LG - BR Steering pad switch signal (Distance control switch signal) Ignition switch on, Steering pad switch signal ON 0 to 2V
    D2-16 (MODE) - D2-12 (GND) LG - BR Steering pad switch signal (Distance control switch signal) Ignition switch on, Steering pad switch signal OFF 10 to 14 V
    1. Reference: waveform 1

      HINT:

      • Terminal: LRDD - SGND
      • Gauge set: 2 V/DIV., 10 ms./DIV.
      • Condition: ignition switch on
        Fig 2: Identifying Reference Graph - Waveform 1
        G05140630Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reference: waveform 2

      HINT:

      • Terminal: LRRD - SGND
      • Gauge set: 2 V/DIV., 5 ms./DIV.
      • Condition: ignition switch on
        Fig 3: Identifying Reference Graph - Waveform 2
        G05140631Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK ECM 
    Fig 4: Identifying ECM Connector Terminals
    G05273613Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU TERMINAL REFERENCE TABLE

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    E5-15 (STP) - E7-1 B - BR Stop light signal Brake pedal released (Stop light switch off) Below 1 V
    E5-15 (STP) - E7-1 B - BR Stop light signal Brake pedal depressed (Stop light switch on) 10 to 14 V
    E5-16 (ST1-) - E7-1 GR - BR Stop light signal Ignition switch on, Brake pedal depressed (Stop light switch on) Below 1 V
    E5-16 (ST1-) - E7-1 GR - BR Stop light signal Ignition switch on, Brake pedal released (Stop light switch off) 10 to 14 V
    E5-23 (TC) - E7-1 (E1) BR - BR Terminal TC of DLC3 Ignition switch on 10 to 14 V
    E5-23 (TC) - E7-1 (E1) BR - BR Terminal TC of DLC3 Connect terminals TC and CG of DLC3 Below 1 V
    E5-31 (LGND) - Body ground LG - Body ground Ground Always Below 1 Ω
    E6-2 (CCS) - E7-1 (E1) P - BR Cruise control main switch signal Ignition switch on 10 to 14 V
    E6-2 (CCS) - E7-1 (E1) P - BR Cruise control main switch signal CANCEL switch on 6.6 to 10.1 V
    E6-2 (CCS) - E7-1 (E1) P - BR Cruise control main switch signal - (COAST)/SET switch on 4.5 to 7.1 V
    E6-2 (CCS) - E7-1 (E1) P - BR Cruise control main switch signal + (ACCEL)/RES (RESUME) switch on 2.3 to 4.0 V
    E6-2 (CCS) - E7-1 (E1) P - BR Cruise control main switch signal Main switch on Below 1 V
    E6-4 (CCHG) - E7-1 (E1) GR - BR Distance control switch signal Ignition switch on, Cruise control main switch on, MODE switch on Below 1 V
    E6-4 (CCHG) - E7-1 (E1) GR - BR Distance control switch signal Ignition switch on, Cruise control main switch on, MODE switch off 10 to 14 V
    E7-1 (E1) - Body ground BR - Body ground Ground Always Below 1 Ω

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

  3. CHECK LASER SENSOR 
    Fig 5: Identifying L1 Connector Terminals
    G05140633Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    ECU TERMINAL REFERENCE CHART

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

      HINT:

      • Terminal: LRDD - SGND
      • Gauge set: 2 V/DIV., 10 ms./DIV.
      • Condition: ignition switch on
        Fig 6: Identifying Reference Graph - Waveform 1
        G05273652Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reference: waveform 2

      HINT:

      • Terminal: LRRD - SGND
      • Gauge set: 2 V/DIV., 5 ms./DIV.
      • Condition: ignition switch on
        Fig 7: Identifying Reference Graph - Waveform 2
        G05140631Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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