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Terminals Of Ecu

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Identifying Combination Meter Connector Terminals
    G04980526Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    VOLTAGE SPECIFICATION

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    B (F2-1) - Body ground G - Body ground Turn indicator light signal Turn the ignition switch on (IG), turn signal RH indicator light OFF Below 1 V
    Turn the ignition switch on (IG), turn signal RH indicator light ON 10 to 14 V
    B (F2-2) - Body ground L - Body ground Turn indicator light signal Turn the ignition switch on (IG), turn signal LH indicator light OFF Below 1 V
    Turn the ignition switch on (IG), turn signal LH indicator light ON 10 to 14 V
    CHK (F2-4) - Body ground R - Body ground Malfunction indicator lamp signal Turn the ignition switch on (IG), CHECK ENGINE warning light ON Below 3 V
    Turn the ignition switch on (IG), CHECK ENGINE warning light OFF 10 to 14 V
    B/LE (F2-6) - Body ground LG - Body ground Brake fluid level warning light signal Turn the ignition switch on (IG), BRAKE warning light OFF 10 to 14 V
    Turn the ignition switch on (IG), BRAKE warning light ON Below 1 V
    +S (F2-12) - Body ground V - Body ground Speed signal (Output) Turn the wheel slowly Pulse generation (See  awaveform 1)
    SI (F2-14) - Body ground W - Body ground Speed signal (Input) Turn the ignition switch on (IG), turn the wheel slowly Pulse generation (See  awaveform 1)
    FR (F2-15) - Body ground GR - Body ground Fuel signal Turn the ignition switch on (IG), fuel level is FULL Below 1 V
    Turn the ignition switch on (IG), fuel level is EMPTY 3 to 7 V
    FE (F2-16) - Body ground P - Body ground Ground (Fuel ground) Always Below 1 V
    B2 (F1-1) - Body ground V - Body ground Battery Always 10 to 14 V
    B (F1-2) - Body ground R - Body ground Battery Always 10 to 14 V
    WLVL (F1-5) ((1)) - Body ground LG - Body ground Washer level warning switch signal Turn the ignition switch on (IG), washer level warning light ON Below 1 V
    Turn the ignition switch on (IG), washer level warning light off 10 to 14 V
    TIRE (F1-7) ((2)) - Body ground L - Body ground Tire pressure warning light signal Turn the ignition switch on (IG), tire pressure warning light ON 0.9 to 3.2 V
    Turn the ignition switch on (IG), tire pressure warning light off 3.2 V or higher
    S (F1-8) - Body ground O - Body ground Engine oil pressure warning light signal Turn the ignition switch on (IG), engine oil pressure warning light OFF 10 to 14 V
    Turn the ignition switch on (IG), engine oil pressure warning light ON Below 1 V
    P/SB (F1-9) - Body ground P - Body ground Passenger seat belt warning light signal Sit on the front passenger seat, turn the ignition switch on (IG), front passenger seat belt warning light OFF 10 to 14 V
    Sit on the front passenger seat, turn the ignition switch on (IG), front passenger seat belt warning light Blinks 10 to 14 V ↔ Below 1 V
    ILL- (F1-11) - Body ground BR - Body ground Illumination signal Turn the ignition switch on (IG) 10 to 14 V ↔ Below 1 V
    E2 (F1-12) - Body ground W-B - Body ground Ground (Power ground) Always Below 1 V
    IG+ (F1-13) - Body ground GR - Body ground Ignition switch signal Turn the ignition switch off Below 1 V
    Turn the ignition switch on (IG) 10 to 14 V
    CANH (F1-17) - Body ground B - Body ground CAN communication signal - -
    CANL (F1-18) - Body ground W - Body ground CAN communication signal - -
    DISP (F1-22) - Body ground V - Body ground Steering pad switch signal Turn the ignition switch on (IG), DISP switch off 4 to 6 V
    Turn the ignition switch on (IG), DISP switch ON Below 1 V
    CHG- (F1-23) - Body ground L - Body ground Charge warning light signal Turn the ignition switch on (IG), CHARGE warning light OFF 10 to 14 V
    Turn the ignition switch on (IG), CHARGE warning light ON Below 1 V
    ES (F1-24) - Body ground BR - Body ground Ground (Signal ground) Always Below 1 V
    (1) With Washer Level Warning Light
    (2) with Tire Pressure Warning System
    1. Waveform 1 (Reference): Using oscilloscope:
      WAVEFORM REFERENCE (WAVEFORM 1)

      Item Condition
      Tool setting 5 V/DIV., 20 ms/DIV.
      Vehicle condition Driving at approx. 20 km/h (12 mph)
      Fig 2: Identifying Waveform 1
      G04966493Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. COMBINATION METER INNER CIRCUIT 
    Fig 3: Combination Meter Inner Circuit Diagram (1 Of 3)
    G04980528Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Combination Meter Inner Circuit Diagram (2 Of 3)
    G04980529Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 5: Combination Meter Inner Circuit Diagram (3 Of 3)
    G04980530Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINALS REFERENCE

    Terminal No. Wire harness side
    F2 1 Turn Signal Flasher (B)
    2 Turn Signal Flasher (B)
    3 -
    4 ECM (CHK)
    5 -
    6 Brake Fluid Level Warning Switch (B/LE)
    7 -
    8 -
    9 -
    10 -
    11 -
    12 Each part that uses speed signal (+S)
    13 -
    14 Skid Control ECU (SI)
    15 Fuel Sender Gauge Assembly (FR)
    16 Fuel Sender Gauge Assembly (FE)
    F1 1 MPX-B Fuse (B2)
    2 DOME Fuse (B)
    3 -
    4 -
    5 Washer Level Warning Switch (WLVL) ((1))
    6 -
    7 Tire Pressure Warning ECU (TIRE) ((2))
    8 Oil Pressure Warning Switch (S)
    9 Clock Assembly (P/SB)
    10 -
    11 PANEL Fuse (ILL-)
    12 Ground (E2)
    13 No. 2 GAUGE Fuse (IG+)
    14 -
    15 -
    16 -
    17 CAN Communication Line (CANH)
    18 CAN Communication Line (CANL)
    19 -
    20 -
    21 -
    22 Steering Pad Switch (DISP)
    23 Alternator L Terminal (CHG-)
    24 Ground (ES)
    *1: without VSC
    *2: with VSC
    (1) With Washer Level Warning Light
    (2) with Tire Pressure Warning System
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