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Terminals Of Ecu [09/2017 - 07/2020]

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Combination Meter Assembly Connector Terminal Identification
    GTY500562Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage, resistance and waveform according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      I10-2 (MSM+) - Body ground L - Body ground Steering pad switch assembly signal Power switch on (IG), enter, top and back switches on steering pad switch assembly not pushed 4.8 to 5.2 V
      Power switch on (IG), enter, top or back switches on steering pad switch assembly pushed Below 1 V
      I10-3 (MSTI) - Body ground B - Body ground Steering pad switch assembly signal Power switch on (IG), up, down, right, and left switches on steering pad switch assembly not pushed 4.8 to 5.2 V
      Power switch on (IG), up, down, right, or left switches on steering pad switch assembly pushed Below 1 V
      I10-4 (ODO) - Body ground G - Body ground ODO/TRIP switch signal Power switch on (IG), ODO/TRIP switch not pushed 4 to 6 V
      Power switch on (IG), ODO/TRIP switch pushed Below 1 V
      I10-5 (EPB) - Body ground R - Body ground Parking brake switch signal Power switch on (IG), parking brake switch is off 11 to 14 V
      Power switch on (IG), parking brake switch is on Below 1.5 V
      I10-9 (S) - Body ground LG - Body ground Engine oil pressure switch signal "Low Oil Pressure Stop in a Safe Place See Owner's Manual" is displayed Below 1 V
      "Low Oil Pressure Stop in a Safe Place See Owner's Manual" is not displayed 11 to 14 V
      I10-15 (OILW) - Body ground B - Body ground Ground Always Below 1 Ω
      I10-16 (WLVL) - Body ground LG - Body ground Washer fluid level signal Power switch on (IG), washer fluid level not low 11 to 14 V
      Power switch on (IG), washer fluid level low Below 1 V
      I10-19 (+S) - Body ground V - Body ground Speed signal for other system (Output) Driving at approximately 20 km/h (12 mph) Pulse generation (See waveform 1)
      I10-20 (SI) - Body ground V - Body ground Speed signal for other system (Input) Driving at approximately 20 km/h (12 mph) Pulse generation (See waveform 1)
      I10-21 (IG+) - Body ground B - Body ground Power switch signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      I10-22 (B) - Body ground Y - Body ground Battery Power switch off 11 to 14 V
      I10-23 (IND) - Body ground*1 W - Body ground Warning signal output Approximately 3 seconds after turning power switch on (IG) Below 2.8 V
      I10-25 (TR) - Body ground V - Body ground Trip switch signal Power switch on (IG), up switch and down switch of trip switch not pushed 4.6 to 5.3 V
      Power switch on (IG), up switch of trip switch pushed Below 1 V
      Power switch on (IG), down switch of trip switch pushed 2 to 3.6 V
      I10-26 (SW3) - Body ground P - Body ground Trip switch signal Always Below 1 V
      I10-27 (FR) - I10-28 (FE) SB - GR Fuel sender gauge signal Power switch on (IG), fuel level F Below 1 V
      Power switch on (IG), fuel level E 4.5 to 9 V
      I10-29 (CANH) - Body ground G - Body ground CAN communication line - -
      I10-30 (CANL) - Body ground W - Body ground CAN communication line - -
      I10-31 (ES) - Body ground W-B - Body ground Ground Always Below 1 Ω
      I10-32 (TX+) - Body ground*2 R - Body ground Headup display communication signal Power switch on (IG) Pulse generation (See waveform 2)
      I10-33 (CS) - Body ground*2 Y - Body ground Headup display communication signal Power switch on (IG) Pulse generation (See waveform 3)
      I10-38 (INT) - Body ground LG - Body ground Tire pressure warning reset switch Power switch on (IG), tire pressure warning reset switch off 8 to 15 V
      Power switch on (IG), tire pressure warning reset switch on Below 1 V
      I10-39 (ILL-) - Body ground P - Body ground Illumination signal Power switch on (IG), headlight dimmer switch off 11 to 14 V
      Power switch on (IG), headlight dimmer switch in tail or head position Below 1 V
      I10-40 (EP) - Body ground W-B - Body ground Ground Always Below 1 Ω
      I11-1 (B) - Body ground L - Body ground Battery Power switch off 11 to 14 V
      I11-2 (HZSW) - Body ground B - Body ground Hazard warning switch signal Power switch on (IG), hazard warning switch not pressed 11 to 14 V
      Power switch on (IG), hazard warning switch pressed Below 1 V
      I11-3 (ER) - Body ground L - Body ground RH turn indicator light signal (Input) Power switch on (IG), RH turn signal switch off 11 to 14 V
      Power switch on (IG), RH turn signal switch on Below 1 V
      I11-4 (EL) - Body ground R - Body ground LH turn indicator light signal (Input) Power switch on (IG), LH turn signal switch off 11 to 14 V
      Power switch on (IG), LH turn signal switch on Below 1 V
      I11-5 (TRNR) - Body ground SB - Body ground RH turn indicator light signal (Output) Power switch on (IG), RH turn indicator light off Below 1 V
      Power switch on (IG), RH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      I11-7 (LR) - Body ground L - Body ground RH turn indicator light signal (Output) Power switch on (IG), RH turn indicator light off Below 1 V
      Power switch on (IG), RH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      I11-8 (SW) - Body ground B - Body ground Headlight dimmer switch assembly (full turn) signal Headlight dimmer switch assembly on (full turn) 11 to 14 V
      Headlight dimmer switch assembly off Below 1 V
      I11-9 (MSCL) - Body ground W - Body ground CAN communication line - -
      I11-10 (MSCH) - Body ground R - Body ground CAN communication line - -
      I11-11 (TRNL) - Body ground Y - Body ground LH turn indicator light signal (Output) Power switch on (IG), LH turn indicator light off Below 1 V
      Power switch on (IG), LH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      I11-12 (HAZM) - Body ground R - Body ground Hazard warning signal switch signal (Output) Power switch on (IG), hazard warning signal switch not pressed Below 1 V
      Power switch on (IG), hazard warning signal switch pressed 11 to 14 V ←→ Below 1 V
      I11-13 (LL) - Body ground Y - Body ground LH turn indicator light signal (Output) Power switch on (IG), LH turn indicator light off Below 1 V
      Power switch on (IG), LH turn indicator light blinking 11 to 14 V ←→ Below 1 V
      I105-1 (GVIF) - Body ground*3 B - Body ground GVIF communication line - -

      () *1: w/ Vehicle Proximity Notification System*2: w/ Headup Display*3: except 8 Speakers

      1. Using an oscilloscope, check waveform 1.
        Fig 2: Waveform 1
        GTY436923Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 1 (REFERENCE)

        Item Condition
        Tester Connection
        • I10-19 (+S) - Body ground
        • I10-20 (SI) - Body ground
        Tool setting 5 V/DIV., 20 ms./DIV.
        Vehicle condition Driving at approximately 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.

      2. Using an oscilloscope, check waveform 2.
        WAVEFORM 2 (REFERENCE)

        Item Condition
        Tester Connection I10-32 (TX+) - Body ground
        Tool setting 5 V/DIV., 200 μs./DIV.
        Vehicle condition Power switch on (IG)

        HINT: 

        The period of the signal changes depending on the communication state.

        Fig 3: Waveform 2
        GTY498094Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Using an oscilloscope, check waveform 3.
        WAVEFORM 3 (REFERENCE)

        Item Condition
        Tester Connection I10-33 (CS) - Body ground
        Tool setting 5 V/DIV., 2 ms./DIV.
        Vehicle condition Power switch on (IG)

        HINT: 

        The period of the signal changes depending on the communication state.

        Fig 4: Waveform 3
        GTY521481Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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