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Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
  1. CLEARANCE WARNING ECU 
    Fig 1: Identifying ECU Terminals
    G05753799Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINALS REFERENCE

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    Q37-1 (S7) - Q37-14 (E7) R - W Ultrasonic sensor (Rear right center sensor) Signals are transmitted from ECU to rear right center sensor (During OFF sensing) Pulse generation (see  1waveform 1)
    Q37-2 (S5) - Q37-15 (E5) GR - W Ultrasonic sensor (Rear right sensor) Signals are transmitted from ECU to rear right sensor (During OFF sensing) Pulse generation (see  1waveform 1)
    Q37-3 (S8) - Q37-16 (E8) G - W Ultrasonic sensor (Rear left center sensor) Signals are transmitted from ECU to rear left center sensor (During OFF sensing) Pulse generation (see  1waveform 1)
    Q37-4 (S6) - Q37-17 (E6) P - W Ultrasonic sensor (Rear left sensor) Signals are transmitted from ECU to rear left sensor (During OFF sensing) Pulse generation (see  1waveform 1)
    Q37-5 (S1) - Q37-18 (E1) Y - BR Ultrasonic sensor (Front right sensor) Signals are transmitted from ECU to front right sensor (During OFF sensing) Pulse generation (see  1waveform 1)
    Q37-6 (S4) - Q37-19 (E4) GR - BR Ultrasonic sensor (Front left sensor) Signals are transmitted from ECU to front left sensor (During OFF sensing) Pulse generation (see  1waveform 1)
    Q37-8 (IG) - Q37-27 (E) Y - W-B IG signal/IG power source Engine switch on (IG) 11 to 14 V
    Q37-9 (CBZ) - Q37-27 (E) O - W-B Buzzer output Buzzer sounding Pulse generation (see  2waveform 2)
    Q37-14 (E7) - Body ground W - Body ground Ultrasonic sensor (Rear right center sensor) ground Always Below 1 V
    Q37-15 (E5) - Body ground W - Body ground Ultrasonic sensor (Rear right sensor) ground Always Below 1 V
    Q37-16 (E8) - Body ground W - Body ground Ultrasonic sensor (Rear left center sensor) ground Always Below 1 V
    Q37-17 (E6) - Body ground W - Body ground Ultrasonic sensor (Rear left sensor) ground Always Below 1 V
    Q37-18 (E1) - Body ground BR - Body ground Ultrasonic sensor (Front right sensor) ground Always Below 1 V
    Q37-19 (E4) - Body ground BR - Body ground Ultrasonic sensor (Front left sensor) ground Always Below 1 V
    Q37-26 (M+) - Q37-27 (E) BR - W-B BEAN communication Engine switch on (IG), clearance sonar main switch ON Pulse generation
    Q37-27 (E) - Body ground W-B - Body ground ECU ground Always Below 1 V
    1. Reference
      1. Waveform 1
        WAVEFORM REFERENCE

        Item Content
        Terminal No (Symbol) Q37-5 (S1) - Q37-18 (E1)
        Q37-6 (S4) - Q37-19 (E4)
        Q37-2 (S5) - Q37-15 (E5)
        Q37-4 (S6) - Q37-17 (E6)
        Q37-1 (S7) - Q37-14 (E7)
        Q37-3 (S8) - Q37-16 (E8)
        Tool Setting 2V/DIV, 100 μsec/DIV
        Condition Signals are transmitted from ECU to sensor (During OFF sensing)
        Fig 2: Identifying Waveform 1
        G05299939Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Waveform 2
        WAVEFORM REFERENCE

        Item Content
        Terminal No (Symbol) Q.37-9 (CBZ) - Q37-27 (E)
        Tool Setting 2 V/DIV, 1 msec /DIV
        Condition Buzzer sounding
        Fig 3: Identifying Waveform 2
        G05253397Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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