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Terminals Of Ecu

  1. Combination Meter Assembly 
    Fig 1: Identifying Combination Meter Assembly Connector Terminals
    G04115368Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    COMBINATION METER

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    POWER GND (C8-1) - Body ground L-B - Body ground Ground (Power ground) Always Below 1 V
    ILL - (C8-2) - Body ground L - Body ground Illumination signal Turn the ignition switch ON, combination switch TAIL Below 1 V -> 10 to 16 V
    CHECK ENGINE (C8-4) - Body ground BR - Body ground Check engine signal Turn the ignition switch ON, check engine warning light OFF -> ON 10 to 16 V -> Below 1.5 V
    MPX+ (C8-5) - Body ground Y - Body ground Communication line - -
    SPEED SIGNAL (4P) (C8-6) - Body ground LG - Body ground Speed signal (Output) Ignition switch ON, turn the wheel slowly Pulse generation (See waveform)
    IG2 (C8-8) - Body ground GR - Body ground Battery Ignition switch OFF -> ON Below 1 V -> 10 to 16 V
    TURN R (C8-13) - Body ground P - Body ground Turn signal flasher Ignition switch ON, turn signal RH indicator light OFF -> ON Below 1 V -> 10 to 16 V
    TURN L (C8-14) - Body ground B - Body ground Turn signal flasher Ignition switch ON, turn signal LH indicator light OFF -> ON Below 1 V -> 10 to 16 V
    ECU +B (C8-15) - Body ground SB - Body ground Battery Always 10 to 16 V
    DOME +B (C8-16) - Body ground O - Body ground Battery Always 10 to 16 V
    SIGNAL GND (C9-1) - Body ground W-B - Body ground Ground (Signal ground) Always Below 1 V
    FE (C9-2) - Body ground P - Body ground Ground (Fuel ground) Always Below 1 V
    MPX- (C9-4) - Body ground B - Body ground Communication line - -
    FUEL LID A PIN (C9-6) - Body ground R - Body ground Fuel lid open switch signal Turn the ignition switch ON, fuel lid open switch OFF -> ON 10 to 16 V -> Below 1 V
    FUEL LID B PIN (C9-7) - Body ground P - Body ground Fuel lid open switch signal Turn the ignition switch ON, fuel lid open switch OFF -> ON 10 to 16 V -> Below 1 V
    POWER METER (C9-8) - Body ground W - Body ground Power meter signal Ignition switch OFF -> ON Pulse generation (see WAVEFORM 1  )
    MULTI MODE SW (C9-9) - Body ground Y - Body ground Multi mode switch signal Turn the ignition switch ON, multi mode switch OFF -> ON 4 to 6V -> Below 1 V
    H-LP LEVEL (C9-10) ((1)) - Body ground B - Body ground Headlight beam level control signal Turn the ignition switch ON, leveling indicator light OFF -> ON 10 to 16 V -> Below 1 V
    RE (C9-13)- Body ground W - Body ground Ground (Rheostat ground) Always Below 1 V
    RV(C9-14) - Body ground O - Body ground Light control rheostat signal Ignition switch ON, rheostat knob position MIN -> MAX Below 1 V -> 4 to 6 V
    RL(C9-15)- Body ground B - Body ground Light control rheostat signal Ignition switch ON 4 to 6 V
    TCAN SW (C9-16) - Body ground Y - Body ground Tail cancel switch signal Ignition switch ON, tail cancel switch OFF -> ON 4 to 6 V -> Below 1 V
    RSET (C9-17) - Body ground L - Body ground ODO/TRIP switch signal Ignition switch ON, ODO/TRIP switch OFF -> ON 4 to 6 V -> Below 1 V
    SPEED SIGNAL (C9-18) - Body ground BR - Body ground Speed signal (Input) Ignition switch ON, turn the wheel slowly Pulse generation (see WAVEFORM 2  )
    FUEL SENDER (C9-19) - Body ground V - Body ground Fuel level signal Ignition switch ON, fuel level MIN -> MAX 4 to 9 V -> Below 2V
    P SEAT BELT (C9-22) - Body ground P - Body ground Passenger side seat belt signal Ignition switch ON, passenger seat belt warning light OFF -> blinks 10 to 16 V -> Below 1 V
    WASHER LEVEL (C9-24) - Body ground LG - Body ground Washer level indicator light signal Turn the ignition switch ON, washer level indicator light OFF -> ON 10 to 16 V -> Below 1 V
    (1) w/o AFS
    1. Waveform (Reference): Using an oscilloscope:
      WAVEFORM 1

      Item Condition
      Tool setting 1 V/DIV., 2 mu sec/DIV.,
      Vehicle condition Turn the ignition switch to the ON position.
      Fig 2: Identifying Waveform 1
      G04115369Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Waveform (Reference): Using an oscilloscope:

      OK: 

      WAVEFORM 2

      Item Condition
      Tool setting 5 V/DIV., 20 ms/DIV.
      Vehicle condition Driving at approx. 20 km/h (12 mph)
      Fig 3: Identifying Waveform 2
      G04115370Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

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

  2. Integration Control & Panel Assembly (w/o Navigation System) 
    Fig 4: Identifying Integration Control And Panel Assembly Connector Terminals (W/O Navigation System)
    G04115371Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    INTEGRATION CONTROL & PANEL ASSEMBLY (W/O NAVIGATION SYSTEM)

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    +B (C4-1) - Body ground O - Body ground Battery Always 10 to 14 V
    ACC (C4-2) - Body ground GR - Body ground Ignition Switch Signal Ignition switch OFF -> ON Below 1 V -> 10 to 14 V
    LP (C4-4) - Body ground P - Body ground Security Indicator Signal Ignition switch ON, security indicator light ON -> OFF Below 1 V -> 10 to 14 V
    MPX- (C4-5) L - Body ground Multiplex Communication Signal - -
    P-AB (C4-6) - Body ground BR - Body ground Passenger Airbag Off Indicator Light Signal Ignition switch ON, passenger airbag off indicator light OFF -> ON Below 1 V -> 10 to 14 V
    GND (C4-7) - Body ground W-B - Body ground Ground Always Below 1 V
    ILL+ (C4-8) - Body ground G - Body ground Illumination Signal Combination switch OFF -> Head Below 1 V -> 10 to 14 V
    IG+ (C4-9) - Body ground LG - Body ground Ignition Switch Signal Ignition switch signal Below 1 V -> 10 to 14 V
    F (C4-11)- Body ground V - Body ground Turn Light Signal Turn indicator light OFF -> ON Below 1 V -> 10 to 14 V
    MPX- (C4-12) R - Body ground Multiplex Communication Signal - -
    PAON (C4-13) - Body ground Y - Body ground Passenger Airbag On Indicator Light Signal Ignition switch ON, passenger airbag on indicator light OFF -> ON Below 1 V -> 10 to 14 V
    ILL- (C4-14) - Body ground W - Body ground Illumination Signal Ignition switch ON, combination switch Head, and light control rheostat position MIN. -> MAX. Pulse generation (See WAVEFORM )
    1. Waveform (Reference): Using an oscilloscope:

      OK: 

      WAVEFORM

      Item Condition
      Tool setting 5V/DIV., 2 mu sec/DIV.
      Vehicle condition Turn the ignition switch ON, light control rheostat is in the MID position.
      Fig 5: Identifying Waveform
      G04115372Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. Multi-Display Assembly (w/ Navigation system) 
    Fig 6: Identifying Multi-Display Assembly Connector Terminals (W/Navigation System)
    G04115373Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    MULTI-DISPLAY ASSEMBLY (W/ NAVIGATION SYSTEM)

    Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    GND (M5-3) - Body ground W-B - Body ground Ground Always Below 1 V
    IG (M5-10) - Body ground LG - Body ground Ignition Switch Signal Ignition switch OFF -> ON Below 1 V -> 10 to 16 V
    ACC (M5-11) - Body ground GR - Body ground Ignition Switch Signal Ignition switch OFF -> ON Below 1 V -> 10 to 16 V
    +B (M5-12) - Body ground G - Body ground Battery Always 10 to 16 V
    PBEW (M5-21) - Body ground O - Body ground Passenger Seat Belt Indicator Light Signal Ignition switch ON, passenger seat belt indicator light OFF -> ON Pulse generation (See WAVEFORM )
    1. Waveform (Reference): Using an oscilloscope:

      OK: 

      WAVEFORM

      Item Condition
      Tool setting 5 V/DIV., 200 mu sec/DIV.
      Vehicle condition Turn the ignition switch ON, p-belt indicator light blinks.
      Fig 7: Identifying Waveform
      G04115374Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. COMBINATION METER INNER CIRCUIT 
    Fig 8: Combination Meter Inner - Circuit Diagram (1 Of 2)
    G04115375Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 9: Combination Meter Inner - Circuit Diagram (2 Of 2)
    G04115376Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    COMBINATION METER INNER CIRCUIT

    Terminal No. Wire harness side
    C8 1 Ground (Power Ground)
    2 Each part that use illumination signal (Audio Controller, Integration Control & Panel Assembly, Console Box, Multi-display)
    3 -
    4 Hybrid Vehicle Control ECU (Check Engine)
    5 Multiplex Communication Line
    6 Each part that use speed signal
    7 -
    8 Gauge Fuse
    9 -
    10 -
    11 -
    12 -
    13 Turn Signal Flasher R
    14 Turn Signal Flasher L
    15 ECU-B Fuse
    16 DOME Fuse
    C9 1 Ground (Signal Ground)
    2 Ground (Fuel Ground)
    3 -
    4 Multiplex Communication Line
    5 -
    6 Hybrid Vehicle Control ECU (Fuel Lid A Pin)
    7 Hybrid Vehicle Control ECU (Fuel Lid B Pin)
    8 Hybrid Vehicle Control ECU (Power Meter)
    9 Steering Pad Switch (DISP)
    10 Headlight Beam Level Control ECU ((1))
    11 -
    12 -
    13 Light Control Rheostat
    14 Light Control Rheostat
    15 Light Control Rheostat
    16 Light Control Rheostat (Tail Cancel Switch)
    17 Light Control Rheostat (ODO/TRIP Switch)
    18 ABS & Traction Actuator Assembly
    19 Fuel Sender Gauge Assembly
    20 -
    21 -
    22 Integration Control & Panel Assembly ((2))/Multi-display ((3))
    23 -
    24 Washer Level Warning Switch
    (1) w/o AFS
    (2) w/o Navigation System
    (3) w/ Navigation System
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