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Terminals Of Ecu [10/2015 - ]

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Combination Meter Assembly Connector End View
    GTY619205Courtesy 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 table below.
      Terminal No. Wiring Color Terminal Description Condition Specified Condition
      K33-21 (IG+) - Body ground W - Body ground Engine switch signal Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      K33-22 (B) - Body ground P - Body ground Battery Always 11 to 14 V
      K32-8 (B) - Body ground W - Body ground Battery Always 11 to 14 V

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

    3. Measure the resistance on the wire harness side connector according to the value (s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K33-18 (PIND) - Body ground P - Body ground Brake pad sensor signal Always Below 1 Ω

      If the result is not as specified, there may be a malfunction in the wire harness or pad wear indicator wire assembly.

    4. Measure the resistance on the wire harness side connector according to the value (s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K33-31 (ES) - Body ground W-B - Body ground Ground Always Below 1 Ω
      K33-40 (EP) - Body ground W-B - Body ground Ground Always Below 1 Ω

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

    5. Reconnect the combination meter assembly connectors.
    6. Measure the voltage and resistance according to the value (s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K33-1 (GAGE) - K33-24 (GND) B - P Engine oil temperature signal Idling, Engine oil temperature 80 to 105°C (176 to 221°F) 1.24 to 1.94 V
      K33-2 (MSM+) - Body ground L - Body ground Steering pad switch assembly signal Engine switch on (IG), up, down, right, and left switches on steering pad switch assembly not pushed 4.8 to 5.2 V
      Engine switch on (IG), up, down, right, or left switch on steering pad switch assembly pushed Below 1 V
      K33-3 (MSTI) - Body ground V - Body ground Steering pad switch assembly signal Engine switch on (IG), enter, top and back switches on steering pad switch assembly not pushed 4.8 to 5.2 V
      Engine switch on (IG), enter, top or back switch on steering pad switch assembly pushed Below 1 V
      K33-4 (RSET) - Body ground G - Body ground ODO/TRIP switch signal Engine switch on (IG), ODO/TRIP switch not pushed 4 to 6 V
      Engine switch on (IG), ODO/TRIP switch pushed Below 1 V
      K33-9 (S) - Body ground Y - Body ground Oil pressure signal Idling 11 to 14 V
      Engine switch on (IG) Below 1 V
      K33-15 (OILW) - Body ground B - Body ground Engine oil level signal Engine switch on (IG), engine oil level not low 11 to 14 V
      Engine switch on (IG), engine oil level low Below 1 V
      K33-16 (WLVL) - Body ground GR - Body ground Washer fluid level signal Engine switch on (IG), washer fluid level not low 11 to 14 V
      Engine switch on (IG), washer fluid level low Below 1 V
      K33-17 (SW) - Body ground Y - Body ground Brake fluid level signal Engine switch on (IG), brake fluid level not low Below 1 V
      Engine switch on (IG), brake fluid level low 11 to 14 V
      K33-19 (+S) - Body ground SB - Body ground Speed signal for other system (Output) Engine switch on (IG), wheel being rotated Pulse generation (See waveform 1)
      K33-20 (SI) - Body ground V - Body ground Speed signal for other system (Input) Engine switch on (IG), wheel being rotated Pulse generation (See waveform 1)
      K33-25 (TR) - Body ground B - Body ground Light control rheostat switch signal Engine switch on (IG), up switch and down switch of trip switch not pushed 4 to 6 V
      Engine switch on (IG), up switch or down switch of trip switch pushed Below 1 V
      K33-27 (FR) - K33-28 (FE) BR - L Fuel level signal Engine switch on (IG), fuel level warning off Below 1 V
      Engine switch on (IG), fuel level warning on 4.5 to 9 V
      K33-29 (CANH) - Body ground BE - Body ground CAN communication line - -
      K33-30 (CANL) - Body ground W - Body ground CAN communication line - -
      K33-39 (ILL-) - Body ground W - Body ground Illumination signal Headlight dimmer switch off Below 1 V
      Headlight dimmer switch in tail or head position Pulse generation
      K32-2 (TX-) - Body ground V - Body ground Local bus communication line - -
      K32-3 (TX+) - Body ground W- Body ground Local bus communication line - -
      K32-4 (ER) - Body ground B - Body ground RH turn indicator light signal (Input) Engine switch on (IG), RH turn signal switch off 11 to 14 V
      Engine switch on (IG), RH turn signal switch on Below 1 V
      K32-5 (EL) - Body ground L - Body ground LH turn indicator light signal (Input) Engine switch on (IG), LH turn signal switch off 11 to 14 V
      Engine switch on (IG), LH turn signal switch on Below 1 V
      K32-7 (LR) - Body ground G - Body ground RH turn indicator light signal (Output) Engine switch on (IG), RH turn indicator light off Below 1 V
      Engine switch on (IG), RH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      K32-11 (HZSW) - Body ground P - Body ground Hazard warning signal switch signal (Input) Engine switch on (IG), hazard warning signal switch not pressed 11 to 14 V
      Engine switch on (IG), hazard warning signal switch pressed Below 1 V
      K32-12 (HAZM) - Body ground SB - Body ground Hazard warning signal switch signal (Output) Engine switch on (IG), hazard warning signal switch not pressed 11 to 14 V
      Engine switch on (IG), hazard warning signal switch pressed Below 1 V
      K32-13 (LL) - Body ground Y - Body ground LH turn indicator light signal (Output) Engine switch on (IG), LH turn indicator light off Below 1 V
      Engine switch on (IG), LH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      K120-1 (GVIF) - Body ground B - Body ground Video signal (Digital) - -

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

      1. Waveform 1 (Reference) :
        Fig 2: Waveform 1
        GTY436923Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Item Condition
        Tool setting 5 V/DIV., 20 ms./DIV.
        Vehicle condition Engine switch on (IG), 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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