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Terminals Of Ecu [10/2015 - ]

  1. COMBINATION METER ASSEMBLY 
    GTY619207Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      N39-2 (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
      N39-3 (ER) - Body ground B - Body ground RH turn signal switch signal 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
      N39-4 (EL) - Body ground L - Body ground LH turn signal switch signal 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
      N39-5 (TRNR) - Body ground G - Body ground Rear turn signal light RH signal 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
      N39-6 (INT) - Body ground Y - Body ground Tire pressure warning ECU and receiver signal Engine switch on (IG) 8 to 15 V
      Engine switch on (IG), steering pad switch assembly operated, "TPMS" selected on the multi-information display and "ENTER" switch (steering pad switch assembly) pressed and held Below 1.5 V
      N39-7 (LR) - Body ground G - Body ground Front and side turn signal light RH signal 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
      N39-9 (TX-) - Body ground V - Body ground Local BUS communication line - -
      N39-10 (TX+) - Body ground W - Body ground Local BUS communication line - -
      N39-11 (TRNL) - Body ground SB - Body ground Rear turn signal light LH signal Engine switch on (IG), LH turn signal switch off 11 to 14 V
      Engine switch on (IG), LH turn signal switch on 11 to 14 V ←→ Below 1 V
      N39-12 (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
      N39-13 (LL) - Body ground Y - Body ground Front and side turn signal light LH signal 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
      N40-1 (B) - Body ground W - Body ground Battery Always 11 to 14 V
      N40-2 (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 4.3 to 6 V
      Engine switch on (IG), up switch on steering pad switch assembly pushed 1 to 2 V
      Engine switch on (IG), down switch on steering pad switch assembly pushed 2.3 to 3.2 V
      Engine switch on (IG), right switch on steering pad switch assembly pushed 3.4 to 4.1 V
      Engine switch on (IG), left switch on steering pad switch assembly pushed Below 0.6 V
      N40-3 (MSTI) - Body ground V - Body ground Steering pad switch assembly signal Engine switch on (IG), enter, back and top switches on steering pad switch assembly not pushed 4.3 to 6 V
      Engine switch on (IG), enter switch on steering pad switch assembly pushed Below 0.6 V
      Engine switch on (IG), back switch on steering pad switch assembly pushed 2.3 to 3.2 V
      Engine switch on (IG), top switch on steering pad switch assembly pushed 1 to 2 V
      N40-4 (RSET) - Body ground G - Body ground ODO/TRIP switch signal ODO/TRIP switch off 11 to 14 V
      ODO/TRIP switch on Below 1 V
      N40-5 (EPB) - Body ground GR - Body ground Parking brake switch signal Engine switch on (IG), parking brake switch off 11 to 14 V
      Engine switch on (IG), parking brake switch on Below 1.5 V
      N40-9 (S) - Body ground* Y - Body ground Engine oil pressure switch signal Engine switch on (IG), engine oil pressure warning display off 11 to 14 V
      Engine switch on (IG), engine oil pressure warning display on Below 1 V
      N40-15 (OILW) - Body ground B - Body ground Engine oil level sensor signal Engine switch on (IG), engine oil level warning display off 11 to 14 V
      Engine switch on (IG), engine oil level warning display on Below 1 V
      N40-16 (WLVL) - Body ground GR - Body ground Washer fluid level warning switch signal Engine switch on (IG), washer fluid level warning display off 11 to 14 V
      Engine switch on (IG), washer fluid level warning display on Below 1 V
      N40-17 (SW) - Body ground Y - Body ground Brake fluid level warning switch signal Engine switch on (IG), brake fluid level warning switch off 11 to 14 V
      Engine switch on (IG), brake fluid level warning switch on Below 1 V
      N40-19 (+S) - Body ground SB - Body ground Speed signal for other systems (Output) Driving at approximately 20 km/ h (12 mph) Pulse generation (See waveform 1)
      N40-20 (SI) - Body ground V - Body ground Speed signal for other systems (Input) Driving at approximately 20 km/ h (12 mph) Pulse generation (See waveform 1)
      N40-21 (IG+) - Body ground W - Body ground Engine switch signal Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      N40-22 (B) - Body ground P - Body ground Battery Always 11 to 14 V
      N40-23 (IND) - Body ground GR - Body ground Vacuum warning switch signal Engine started, vacuum warning switch off (brake warning light / red (malfunction) off) 11 to 14 V
      Engine started, vacuum warning switch on (brake warning light / red (malfunction) on) Below 1 V
      N40-25 (TR) - Body ground B - Body ground Light control rheostat signal Light control rheostat up switch off 4.6 to 5.3 V
      Light control rheostat up switch on Below 1 V
      Light control rheostat down switch off 4.6 to 5.3 V
      Light control rheostat down switch on 2 to 3.6 V
      N40-27 (FR) - Body ground BR - Body ground Fuel level signal Fuel level F Below 1 V
      Fuel level E 4.5 to 9 V
      N40-28 (FE) - Body ground L - Body ground Ground (Fuel ground) Always Below 1 Ω
      N40-29 (CANH) - Body ground V - Body ground CAN communication line - -
      N40-30 (CANL) - Body ground W - Body ground CAN communication line - -
      N40-31 (ES) - Body ground W-B - Body ground Ground (Signal ground) Always Below 1 Ω
      N40-39 (ILL-) - Body ground W - Body ground Headlight dimmer switch (TAIL) signal Engine switch on (IG), headlight dimmer switch (TAIL) off 11 to 14 V
      Engine switch on (IG), headlight dimmer switch (TAIL) on Below 1 V
      N40-40 (EP) - Body ground W-B - Body ground Ground (Illumination ground) Always Below 1 Ω
      N170-1 (GVIF) - Body ground B - Body ground Video signal (Digital) - -
      • *: for 2GR-FKS
      1. Using an oscilloscope, check waveform 1.
        GTY531598Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        WAVEFORM 1 (REFERENCE)

        Item Condition
        Tester connection N40-19 (+S) - Body ground
        N40-20 (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.

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