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Terminals Of Ecu

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Identifying Terminals Of ECU
    G05236995Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL DESCRIPTION SPECIFIED CONDITION CHART

    Symbols (Terminals No.) Wiring Color Terminal Description Condition Specified Condition
    +B (C11-1) - Body ground L-W - Body ground Battery Always 10 to 14 V
    CHG+ (C11-2) - Body ground B-O - Body ground Charge signal Engine running Below 1 V
    Engine stopped 10 to 14 V
    ST (C11-3) - Body ground B - Body ground Starting signal Ignition switch OFF Below 1 V
    Ignition switch ON 7 to 14 V
    ILL+ (C11-4) - Body ground G - Body ground Tail light signal Light control switch OFF Below 1 V
    Light control switch ON 10 to 14 V
    AIR BAG (C11-6) - Body ground B-Y - Body ground AIR BAG signal AIR BAG warning light OFF 8 to 14 V
    AIR BAG warning light ON Below 1 V
    TAIL CANCEL (C11-7) - Body ground B - Body ground Tall cancel signal (Light control) Tail cancel switch OFF Below 1 V
    Tail cancel switch ON 10 to 14 V
    ABS (C11-8) - Body ground W-R - Body ground ABS signal ABS warning light ON 5 to 9V
    ABS warning light OFF Below 1 V
    EBD (C11-9) - Body ground R- Body ground ABS or VSC signal Brake warning light ON 5 to 9V
    Brake warning light OFF Below 1 V
    OIL PRESSURE (C11-10) - Body ground W - Body ground Oil pressure signal OIL/P warning light ON Below 1 V
    OIL/P warning light OFF 10 to 14 V
    CHG - (C11-11) - Body ground Y - Body ground Charge signal Ignition switch OFF 10 to 14 V
    Ignition switch ON Below 1 V
    BRAKE LEVEL SW(C11 - 12) - Body ground R-W- Body ground Brake fluid level signal Brake fluid level warning light OFF Below 1 V
    Brake fluid level warning light ON 8 to 14 V
    CRUISE (C11-14) - Body ground G-R - Body ground CRUISE signal Ignition switch ON and cruise indicator light ON Below 1 V
    Ignition switch ON and cruise indicator light OFF 10 to 14 V
    KEY SW(C11-15) - Body ground L-B - Body ground KEY switch signal Ignition key not inserted Below 1 V → 10 to 14 V
    CHECK ENGINE (C11-16) - Body ground R-Y - Body ground CHECK ENGINE signal CHECK ENGINE warning light ON Below 2 V
    CHECK ENGINE warning light OFF 8 to 14V
    4P OUT (C11-17) - Body ground V-W - Body ground Speed signal (Output) Ignition switch ON and turn the wheel slowly Pulse generation (See  a waveform 1)
    SI (C11-18) - Body ground W-G - Body ground Speed signal (Input) Ignition switch ON and turn the wheel slowly Pulse generation (See  a waveform 1)
    FUEL EARTH (C11-19) - Body ground BR - Body ground Ground (Fuel sender gauge) Always Below 1 Ω
    SIGNAL EARTH (C11-20) - Body ground BR - Body ground Ground Always Below 1 Ω
    IG1+ (C11-21) - Body ground R-W - Body ground Ignition switch signal (ON) Ignition switch OFF Below 1 V
    Ignition switch ON 10 to 14 V
    BEAM+ (C11-22) - Body ground R - Body ground Hi-Beam signal Hi-Beam OFF Below 1 V
    Hi-Beam ON 10 to 14 V
    TURN R (C11-23) - Body ground G-Y - Body ground Turn signal R Ignition switch ON, turn signal RH indicator light OFF Below 1 V
    Ignition switch ON, turn signal RH indicator light ON 10 to 14 V
    TURN L (C11-24) - Body ground G-B - Body ground Turn signal L Ignition switch ON, turn signal LH indicator light OFF Below 1 V
    Ignition switch ON, turn signal LH indicator light ON 10 to 14 V
    EXCEPT D DOOR (C11-25) - Body ground R - Body ground Door condition signal (Except for D door) Except driver door OPEN Below 1 V
    Except driver door CLOSE 10 to 14 V
    D DOOR (C11-26) - Body ground R-W - Body ground D door condition signal Driver door OPEN Below 1 V
    Driver door CLOSE 10 to 14 V
    TACHO (C11-27) - Body ground B - Body ground Tachometer signal Engine running Pulse generation (See  b waveform 2)
    FUEL (C11-29) - Body ground Y - Body ground Fuel level signal Ignition switch ON, fuel level is FULL Below 1 V
    Ignition switch ON, fuel level is EMPTY 4 to 7V
    P-BELT OUT (C11-30) - Body ground L - Body ground Seat belt condition signal (Passenger side) Passenger seat belt indicator light is OFF 10 to 14 V
    Passenger seat belt indicator light is Blinks Below 1 V
    D-BELT SW(C11-31) - Body ground G-Y - Body ground Seat belt condition signal (Driver Side) Driver seat belt indicator light is Blinks Below 1 V
    Driver seat belt indicator light is OFF 10 to 14 V
    WASHER LEVEL (C11-32) ((1)) - Body ground L-W - Body ground Washer level signal WASH LVL indicator light OFF 10 to 14 V
    WASH LVL indicator light ON Below 1 V
    HEAD (C11-33)((2)) - Body ground R - Body ground Headlight signal Light control switch is OFF 10 to 14 V
    Light control switch is HEAD Below 1 V
    BEAM - (C11-34) - Body ground W-B - Body ground Hi-Beam signal Hi-Beam ON 10 to 14 V
    Hi-Beam OFF Below 1 V
    ILL - (C11-35) - Body ground W-R - Body ground Rheostat signal (Light control) Light control dimmer switch is TAIL/HEAD Pulse generation (See  c waveform 3)
    TEMP (C11-36) - Body ground Y-R - Body ground Coolant temperature signal Ignition switch ON, coolant temperature is 80 to 95°C (176 to 203°F) Pulse generation (See  d waveform 4)
    P-BELT SW (C11-37) - Body ground L-W - Body ground Seat belt condition signal P-BELT indicator light ON 10 to 14 V
    P-BELT indicator light OFF Below 1 V
    OUTSIDE TEMP+(C11-38) - OUTSIDE TEMP-(C11-39) B-B-L Outside temp signal Outside temperature at 25°C (77°F) Approx. 2,784 Ω
    POWER EARTH (C11-40) - Body ground W-B - Body ground Ground Always Below 1 Ω
    VSC(C18-1) - Body ground V- Body ground VSC signal VSC indicator light ON Below 1 V
    VSC indicator light OFF 10 to 14 V
    SLIP (C18-3) - Body ground W - Body ground SLIP signal SLIP indicator light ON Below 1 V
    SLIP indicator light OFF 10 to 14 V
    O/D OFF (C18-4) - Body ground LG - Body ground O/D OFF signal O/D OFF indicator light OFF 10 to 14 V
    O/D OFF indicator light ON Below 1 V
    TPMS(C18-6) - Body ground LG - Body ground TPMS signal TPMS indicator light ON 6.7 to 12 V
    TPMS indicator light OFF Below 1 V
    OUTSIDE TEMP OUT (C18-8) - Body ground R - Body ground Outside temp signal Ignition switch ON Pulse generation (See  e waveform 5)
    (1) Canada
    (2) U.S.A.
    1. Waveform 1 (Reference):
      WAVEFORM REFERENCE

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

      HINT:

      As vehicle speed increases, the cycle of the signal waveform narrows.

      Fig 2: Identifying Waveform 1
      G04966509Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Waveform 2 (Reference):
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 5 V/DIV, 10 ms/DIV.
      Vehicle condition Engine idle speed
      Fig 3: Identifying Waveform 2
      G05236997Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Waveform 3 (Reference):
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 2 V/DIV, 1 ms/DIV.
      Vehicle condition Ignition switch ON

      HINT:

      Duty ratio changes as illumination becomes darker ("A" becomes longer).

      Fig 4: Identifying Waveform 3
      G05196065Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Waveform 4 (Reference):
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 5 V/DIV, 100 ms/DIV.
      Vehicle condition Ignition switch ON
      Fig 5: Identifying Waveform 4
      G05196064Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Waveform 5 (Reference):
      WAVEFORM REFERENCE

      Item Condition
      Tool setting 5 V/DIV, 100 ms/DIV.
      Vehicle condition Ignition switch ON
      Fig 6: Identifying Waveform 5
      G05237000Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. COMBINATION METER INNER CIRCUIT 
    Fig 7: Combination Meter Inner Circuit Diagram (1 Of 2)
    G05237001Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 8: Combination Meter Inner Circuit Diagram (2 Of 2)
    G05237002Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TERMINAL SPECIFICATIONS

    Terminal No. Wire harness side
    C11 1 DOME Fuse
    2 AM2 Fuse
    3 Clutch Start Switch (M/T), Park/Neutral Position Switch (A/T)
    4 Light Control Switch, Tail Relay
    5 -
    6 Airbag Sensor Assembly Center
    7 Light Control Rheostat
    8 Brake Actuator Assembly (with ABS), VSC & Traction Actuator Assembly (with VSC)
    9 Brake Actuator Assembly (with ABS), VSC & Traction Actuator Assembly (with VSC)
    10 Engine Oil Pressure Switch
    11 Generator
    12 Brake Fluid Level Warning Switch, Parking Brake Switch (without ABS)
    13 -
    14 ECM
    15 Unlock Warning Switch Assembly
    16 ECM
    17 Radio and Player (with Navigation), ECM, ECM Integration Relay
    18 Brake Actuator Assembly (with ABS), VSC & Traction Actuator Assembly (with VSC), Vehicle Speed Sensor (without ABS)
    19 Fuel Sender Gauge Assembly
    20 Ground (Signal Ground)
    21 GAUGE Fuse
    22 Headlight Dimmer Switch
    23 Turn Signal Flasher (R)
    24 Turn Signal Flasher (L)
    25 Door Courtesy Light Switch Assembly (Except Driver Side)
    26 Door Courtesy Light Switch Assembly (Driver Side)
    27 ECM
    28 -
    29 Fuel Sender Gauge Assembly
    30 Front Passenger Seat Belt Warning Light
    31 Front Seat Inner Belt Assembly (Driver Side)
    32 Washer Level Sensor
    33 DRL Relay
    34 Headlight Dimmer Switch (Ground)
    35 Light Control Rheostat
    36 ECM
    37 Occupant Detection Sensor
    38 Ambient Temperature Sensor
    39 Ambient Temperature Sensor
    40 Ground (Power Ground)
    C18 1 VSC & Traction Actuator Assembly (with VSC)
    2 -
    3 VSC & Traction Actuator Assembly (with VSC)
    4 O/D Off Switch
    5 -
    6 Brake Actuator Assembly (with ABS), VSC & Traction Actuator Assembly (with VSC)
    7 -
    8 ECM
    9 -
    10 -
    11 -
    12 -
    13 -
    14 -
    15 -
    16 -
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