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Terminals Of Ecu

  1. COMBINATION METER 
    Fig 1: Identifying Combination Meter Connector Terminal
    G06036636Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    E55-1 (WRNP) - Body ground W - Body ground Front passenger side seat belt warning light signal Front passenger seat occupied, ignition switch ON, front passenger side seat belt warning light OFF 11 to 14 V
    Front passenger seat occupied, ignition switch ON, front passenger side seat belt warning light is blinking Below 1 V ↔ 11 to 14 V
    E55-2 (WLVL)(2) - Body ground BE - Body ground Washer indicator light signal Ignition switch ON, WASHER indicator light OFF 11 to 14V
    Ignition switch ON, WASHER indicator light ON Below 1 V
    E55-3 (-) - Body ground L - Body ground Headlight Hi-beam indicator light signal Always 11 to 14 V
    E55-4 (+) - Body ground R - Body ground Headlight Hi-beam indicator light signal Hi-beam switch on Below 1 V
    Hi-beam switch off 11 to 14 V
    E55-5 (B) - Body ground L - Body ground Turn indicator light signal Ignition switch ON, turn signal RH indicator light OFF Below 1 V
    Ignition switch ON, turn signal RH indicator light ON 11 to 14 V
    E55-6 (B) - Body ground Y - Body ground Turn indicator light signal Ignition switch ON, turn signal LH indicator light OFF Below 1 V
    Ignition switch ON, turn signal LH indicator light ON 11 to 14 V
    E55-7 (TIRE) - Body ground P - Body ground Tire pressure warning light signal Ignition switch ON, TIRE PRESSURE warning light OFF Below 1.5 V
    Ignition switch ON, TIRE PRESSURE warning light ON 8 to 14 V
    E55-9 (TX1+) - Body ground LG - Body ground Outside temperature signal Ignition switch ON 5 V or less
    E55-10 (E) - Body ground BR - Body ground Ground (Fuel ground) Always Below 1 V
    E55-11 (EP) - Body ground W-B - Body ground Ground (Illumination ground) Always Below 1 V
    E55-16 (FOG)(1) -Body ground P - Body ground Front fog indicator light signal Front fog light switch on, FRONT FOG indicator light ON 11 to 14 V
    Front fog light switch off, FRONT FOG indicator light OFF Below 1 V
    E55-17 (HEAD)(3)-Body ground GR - Body ground Head indicator light signal Ignition switch ON, HEAD indicator light OFF 11 to 14 V
    Ignition switch ON, HEAD indicator light ON Below 1 V
    E55-20 (EFI) - Body ground R - Body ground MIL (Check engine warning light) signal Ignition switch ON, MIL (check engine) warning light ON Below 3 V
    Ignition switch ON, MIL (check engine) warning light OFF 11 to 14 V
    E55-23 (TEMP) - Body ground GR - Body ground Outside temperature signal Ignition switch ON, outside temperature 25°C (77°F) Approx. 1.3 V
    E55-24 (ILL+) - Body ground G - Body ground Tail indicator light signal Headlight switch (TAIL), TAIL indicator light ON 11 to 14 V
    Headlight switch (TAIL), TAIL indicator light OFF Below 1 V
    E55-25 (L) - Body ground P - Body ground Fuel signal Ignition switch ON, fuel level is FULL Below 1 V
    Ignition switch ON, fuel level is EMPTY 3 to 7 V
    E55-26 (ILL-) - Body ground W - Body ground Illumination signal Ignition switch ON, headlight dimmer switch OFF 11 to 14 V
    Ignition switch ON, headlight dimmer switch TAIL or HEAD position Below 1 V ↔ 11 to 14 V or Blow 1 V
    E55-27 (CANH) - E55-28 (CANL) G-W CAN communication signal Ignition switch ON Pulse generation
    E55-28 (CANL) - E55-27 (CANH) W-G CAN communication signal Ignition switch ON Pulse generation
    E55-29 (ILL-) - Body ground W - Body ground Illumination signal Ignition switch ON, headlight dimmer switch OFF 11 to 14 V
    Ignition switch ON, headlight dimmer switch TAIL or HEAD position Below 1 V ↔ 11 to 14 V or Blow 1 V
    E55-30 (ET) - Body ground BR - Body ground Ground (Signal ground) Always Below 1 V
    E55-32 (B) - Body ground R - Body ground Battery Always 11 to 14 V
    E55-33 (IG+) - Body ground B - Body ground Ignition switch signal Ignition switch off Below 1 V
    Ignition switch ON 11 to 14 V
    E55-35 (SI) - Body ground LG - Body ground Speed signal for other systems (Input) Ignition switch ON, drive wheel turned slowly Pulse generation (See  awaveform)
    E55-36 (+S) - Body ground V - Body ground Speed signal for other systems (Output) Drive wheel turned slowly Pulse generation (See  awaveform)
    E55-38 (S) - Body ground G - Body ground Engine oil pressure warning light signal Ignition switch ON, engine oil pressure warning light OFF 11 to 14 V
    Ignition switch ON, engine oil pressure warning light ON Below 1 V
    E55-39 (CHG-) - Body ground Y - Body ground Charge warning light signal Ignition switch ON, CHARGE warning light OFF 11 to 14 V
    Ignition switch ON, CHARGE warning light ON Below 1 V
    E55-40 (SW) - Body ground BE - Body ground Brake fluid level warning light signal Ignition switch ON, BRAKE warning light OFF 11 to 14 V
    Ignition switch ON, BRAKE warning light ON Below 1 V
    (1) w/ Front Fog Light
    (2) Except for U.S.A.
    (3) for U.S.A.
    1. Waveform (Reference): Using an oscilloscope
      ITEM CONDITION CHART

      Item Condition
      Tool setting 5V/DIV., 20 ms./DIV.
      Vehicle condition Driving at approx. 20 km/h (12 mph)

      HINT:

      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

      Fig 2: Identifying Waveform
      G05420377Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. COMBINATION METER INNER CIRCUIT 
    1. Combination Meter Inner Circuit
    Fig 3: Combination Meter Inner Circuit Diagram (1 Of 3)
    G06036638Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Combination Meter Inner Circuit Diagram (2 Of 3)
    G06036639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 5: Combination Meter Inner Circuit Diagram (3 Of 3)
    G06036640Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL REFERENCE

    Terminal No. Wire Harness Side (Symbol)
    E55 1 Front Passenger Seat Belt Warning Light (WRNP)
    2 Washer Level Warning Switch (WLVL)
    3 DRL Relay (-)
    4 H-LP RH HI Fuse (+)
    5 Turn Signal Flasher (B)
    6 Turn Signal Flasher (B)
    7 Tire Pressure Warning ECU (TIRE)(2)
    8 -
    g Outside Temperature Sensor (TX1+)
    10 Fuel Sender Gauge Assembly (E)
    11 Ground (EP)
    12 -
    13 -
    14 -
    15 -
    16 FR FOG Relay (FOG)(1)
    17 DRL Relay (HEAD)
    18 -
    19 -
    20 ECM (EFI)
    21 -
    22 -
    23 Outside Temperature Sensor (TEMP)
    24 TAIL Fuse (ILL+)
    25 Fuel Sender Gauge Assembly (L)
    26 Each system that uses illumination signal (ILL-)
    27 CAN Communication Line (CANH)
    28 CAN Communication Line (CANL)
    29 Each system that uses illumination signal (ILL-)
    30 Ground (ET)
    31 -
    32 ECU-B Fuse (B)
    33 METER Fuse (IG+)
    34 -
    35 Skid Control ECU (SI)
    36 Each system that uses speed signal (+S)
    37 -
    38 Oil Pressure Switch (S)
    39 Alternator L Terminal (CHG-)
    40 Brake Fluid Level Warning Switch (SW)
    (1) w/ Front Fog Light
    (2) w/ Tire Pressure Warning System
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