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Terminals Of Ecu [09/2019 - ]

  1. COMBINATION METER ASSEMBLY 
    GTY768109Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the combination meter assembly connectors.
    2. Measure the voltage on the wire harness side connector according to the value(s) in the chart below.
      Terminal No. Wiring Color Terminal Description Condition Specified Condition
      F4-39 (IG+) - Body ground P - Body ground Ignition switch signal Ignition switch off Below 1 V
      Ignition switch ON 11 to 14 V
      F4-40 (B) - Body ground SB - Body ground Battery Ignition switch off 11 to 14 V
      F5-1 (B) - Body ground SB - Body ground Battery Ignition switch off 11 to 14 V

      If the result is not as specified, there may be a malfunction in the wire harness.

    3. Reconnect the combination meter assembly connectors.
    4. Measure the voltage and resistance according to the value(s) in the chart below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      F4-1 (RLMT) - Body ground*1 L - Body ground Rear seat belt LH warning light signal Rear seat belt LH fastened within 30 seconds of opening rear door with ignition switch ON 11 to 14 V
      Rear seat belt LH unfastened within 30 seconds of opening rear door with ignition switch ON Below 1 V
      F4-2 (RCMT) - Body ground*1 V - Body ground Rear seat center belt warning light signal Rear seat center belt fastened within 30 seconds of opening rear door with ignition switch ON 11 to 14 V
      Rear seat center belt unfastened within 30 seconds of opening rear door with ignition switch ON Below 1 V
      F4-3 (RRMT) - Body ground*1 W - Body ground Rear seat belt RH warning light signal Rear seat belt RH fastened within 30 seconds of opening rear door with ignition switch ON 11 to 14 V
      Rear seat belt RH unfastened within 30 seconds of opening rear door with ignition switch ON Below 1 V
      F4-4 (INT) - Body ground*2 B - Body ground*6
      SB - Body ground*7      		 Tire pressure warning light signal Ignition switch ON, tire pressure warning light off Below 1 V
      Ignition switch ON, tire pressure warning light on 11 to 14 V
      F4-5 (SI) - Body ground GR - Body ground Speed signal for other system (Input) Ignition switch ON, wheel being rotated Pulse generation (See waveform 1)
      F4-6 (+S) - Body ground V - Body ground Speed signal for other system (Output) Ignition switch ON, wheel being rotated Pulse generation (See waveform 1)
      F4-7 (PKBI) - Body ground*3 GR - Body ground Front passenger side seat belt buckle switch signal Ignition switch ON, front passenger side seat belt fastened and front passenger seat occupied 11 to 14 V
      Ignition switch ON, front passenger side seat belt unfastened and front passenger seat occupied Below 1 V
      F4-9 (S) - Body ground G - Body ground Engine oil pressure switch signal Ignition switch ON, low engine oil level warning light on Below 1 V
      Ignition switch ON, low engine oil level warning light off 11 to 14 V
      F4-10 (MSD) - Body ground*1 V - Body ground Rear seat inner belt signal (LH side) Ignition switch ON, rear LH seat belt unfastened Below 1 V
      Ignition switch ON, rear LH seat belt fastened 11 to 14 V
      F4-11 (MSTI) - Body ground*1 BE - Body ground Rear seat inner belt signal (Center) Ignition switch ON, rear center seat belt unfastened Below 1 V
      Ignition switch ON, rear center seat belt fastened 11 to 14 V
      F4-12 (SW) - Body ground R - Body ground Brake system warning light (red indicator) signal Ignition switch ON, brake system warning light (red indicator) on Below 1 V
      Ignition switch ON, brake system warning light (red indicator) off 11 to 14 V
      F4-13 (MSFM) - Body ground*1 R - Body ground*6
      LG - Body ground*7      		 Rear seat inner belt signal (RH side) Ignition switch ON, rear RH seat belt unfastened Below 1 V
      Ignition switch ON, rear RH seat belt fastened 11 to 14 V
      F4-14 (EP) - Body ground W-B - Body ground Ground Always Below 1 Ω
      F4-16 (FV) - Body ground GR - Body ground Fuel sender gauge (Power source) Fuel F (full tank) → E (empty) 4.5 to 5.5 V
      F4-17 (WLVL) - Body ground*4 LG - Body ground Washer fluid level signal Ignition switch ON washer fluid level not low 11 to 14 V
      Ignition switch ON washer fluid level low Below 1 V
      F4-20 (SW3) - Body Ground*5 W - Body ground Light control rheostat switch ground Always Below 1 Ω
      F4-21 (ET) - Body ground W-B - Body ground Ground Always Below 1 Ω
      F4-23 (FR) - F4-15 (FE&B) G - BE Fuel level signal Ignition switch ON fuel level full Below 1 V
      Ignition switch ON fuel level low (fuel level warning light on) 4.5 to 9 V
      F4-24 (TC) - Body Ground*5 V - Body ground TAIL cancel switch signal TAIL cancel switch OFF → ON 10 kΩ or higher → Below 1 Ω
      F4-25 (SW1) - Body Ground*5 G - Body ground Power source for light control rheostat Ignition switch ON 4.6 to 5.4 V
      F4-26 (SW2) - Body Ground*5 L - Body ground Light control rheostat knob input Light control rheostat knob fully turned downward Below 1 Ω
      Light control rheostat knob fully turned upward 10 kΩ or higher
      F4-28 (MSM+) - Body ground V - Body ground Steering pad switch signal Ignition switch ON, enter, trip and back switches on steering pad switch not pushed 4.3 to 5.2 V
      Ignition switch ON, enter switch on steering pad switch pushed Below 0.6 V
      Ignition switch ON, trip switch on steering pad switch pushed 1.0 to 2.2 V
      Ignition switch ON, back switch on steering pad switch pushed 2.3 to 3.4 V
      F4-31 (CANL) - Body ground SB - Body ground CAN communication line - -
      F4-32 (CANH) - Body ground V - Body ground CAN communication line - -
      F4-33 (MSSL) - Body ground GR - Body ground Steering pad switch signal Ignition switch ON, up, down, right and left switches on steering pad switch assembly not pushed 4.3 to 5.2 V
      Ignition switch ON, left switch on steering pad switch pushed Below 0.6 V
      Ignition switch ON, up switch on steering pad switch pushed 1.0 to 2.2 V
      Ignition switch ON, down switch on steering pad switch pushed 2.3 to 3.4 V
      Ignition switch ON, right switch on steering pad switch pushed 3.4 to 4.5 V
      F4-34 (TEMP) - Body ground SB - Body ground Ambient temperature sensor signal Ambient temperature 25°C (77°F) 1.6 to 1.8 Ω
      F4-35 (TX1+) - Body ground P - Body ground Ambient temperature sensor gauge signal Always Below 1 Ω
      F4-36 (MSCH) - Body ground R - Body ground CAN communication line - -
      F4-37 (MSCL) - Body ground L - Body ground CAN communication line - -
      F4-38 (ILL-) - Body ground B - Body ground Illumination signal Taillights off → on Below 1 V → Pulse generation
      F5-2 (VCM) - Body ground GR - Body ground Vacuum warning switch signal Ignition switch ON, engine idle speed Pulse generation
      F5-3 (HAZ) - Body ground W - Body ground Hazard warning signal switch signal (Output) Hazard warning signal switch off 11 to 14 V
      Hazard warning signal switch on Below 1 V
      F5-5 (TRNR) - Body ground SB - Body ground Rear turn signal light RH signal Ignition switch ON, RH turn indicator light off Below 1 V
      Ignition switch ON, RH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      F5-6 (TRNL) - Body ground Y - Body ground Rear turn signal light LH signal Ignition switch ON, LH turn indicator light off Below 1 V
      Ignition switch ON, LH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      F5-7 (LR) - Body ground V - Body ground Rear turn signal light RH signal Ignition switch ON, RH turn indicator light off Below 1 V
      Ignition switch ON, RH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      F5-8 (SW) - Body ground L - Body ground Turn signal switch (full turn) signal Headlight dimmer switch on (full turn) Below 1 V
      Headlight dimmer switch off 11 to 14 V
      F5-9 (ER) - Body ground P - Body ground RH turn indicator light signal (Input) Ignition switch ON, RH turn signal switch on Below 1 V
      Ignition switch ON, RH turn signal switch off 11 to 14 V
      F5-10 (EL) - Body ground B - Body ground LH turn indicator light signal (Input) Ignition switch ON, LH turn signal switch on Below 1 V
      Ignition switch ON, LH turn signal switch off 11 to 14 V
      F5-13 (LL) - Body ground G - Body ground Rear turn signal light LH signal Ignition switch ON, LH turn indicator light off Below 1 V
      Ignition switch ON, LH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      1. *1: w/ Rear Passenger Seat Belt Warning
      2. *2: w/ Tire Pressure Warning System
      3. *3: w/o Occupant Classification System
      4. *4: w/ Washer Level Warning Switch
      5. *5: w/ Light Control Rheostat
      6. *6: for TMMT Made
      7. *7: for TMC Made

      If the result is not as specified, the combination meter assembly may be malfunctioning.

      1. Waveform 1 (Reference):
        GTY436923Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Item Condition
        Tool setting 5 V/DIV., 20 ms./DIV.
        Vehicle condition Ignition switch ON wheel being rotated

        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.

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