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Terminals Of Ecu [10/2016 - 10/2017]

  1. COMBINATION METER ASSEMBLY 
    Fig 1: Combination Meter Assembly Connector Terminal Identification
    GTY469196Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Measure the voltage and resistance and check of pulses according to the value(s) in the table below.
      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      K3-2 (MSM+) - Body ground L - 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
      K3-3 (MSTI) - Body ground P - 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
      K3-4 (ODO) - Body ground L - 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
      K3-8 (CHG-) - Body ground*3 L - Body ground Charge warning light signal Engine switch on (IG), charge warning light off 11 to 14 V
      Engine switch on (IG), charge warning light on Below 1 V
      K3-9 (S) - Body ground*3 LG - Body ground Engine oil pressure signal Idling 11 to 14 V
      Engine switch on (IG) Below 1 V
      K3-12 (RRSB) - Body ground R - Body ground Rear seat belt indicator light RH signal Engine switch on (IG), rear seat belt warning light RH off 11 to 14 V
      Engine switch on (IG), rear seat belt warning light RH on Below 1 V
      K3-13 (RCSB) - Body ground W - Body ground Rear seat belt indicator light center signal Engine switch on (IG), rear seat belt warning light center off 11 to 14 V
      Engine switch on (IG), rear seat belt warning light center on Below 1 V
      K3-14 (RLSB) - Body ground G - Body ground Rear seat belt indicator light LH signal Engine switch on (IG), rear seat belt warning light LH off 11 to 14 V
      Engine switch on (IG), rear seat belt warning light LH on Below 1 V
      K3-15 (OILW) - Body ground GR - 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
      K3-16 (WLVL) - Body ground V - 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
      K3-17 (SW) - Body ground LG - Body ground Brake fluid level signal Engine switch on (IG), brake fluid level not low 11 to 14 V
      Engine switch on (IG), brake fluid level low Below 1 V
      K3-19 (+S) - Body ground L - Body ground Speed signal for other systems (Output) Engine switch on (IG), wheel being rotated Pulse generation (See waveform 1)
      K3-20 (SI) - Body ground V - Body ground Speed signal for other system (Input) Engine switch on (IG), wheel being rotated Pulse generation (See waveform 1)
      K3-21 (IG+) - Body ground B - Body ground Engine switch signal Engine switch off Below 1 V
      Engine switch on (IG) 11 to 14 V
      K3-22 (B) - Body ground LG - Body ground Battery Always 11 to 14 V
      K3-23 (VCM) - Body ground*2 SB - Body ground Vacuum warning switch signal Engine started, vacuum warning switch off (brake warning light off) 11 to 14 V
      Engine started, vacuum warning switch on (brake warning light on) Below 1 V
      K3-25 (TR) - Body ground P - Body ground Trip 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
      K3-26 (SW3) - Body ground W - Body ground Ground for trip switch Always Below 1 Ω
      K3-27 (FR) - K3-28 (FE) SB - GR 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
      K3-29 (CANH) - Body ground LG - Body ground CAN communication line - -
      K3-30 (CANL) - Body ground B - Body ground CAN communication line - -
      K3-31 (ES) - Body ground BR - Body ground Ground Always Below 1 Ω
      K3-35 (RLMT) - Body ground L - Body ground Rear seat belt buckle switch LH signal Engine switch on (IG), rear seat belt LH unfastened Below 1 V
      Engine switch on (IG), rear seat belt LH fastened 11 to 14 V
      K3-36 (RCMT) - Body ground W - Body ground Rear seat belt buckle switch center signal Engine switch on (IG), rear seat belt center unfastened Below 1 V
      Engine switch on (IG), rear seat belt center fastened 11 to 14 V
      K3-37 (RRMT) - Body ground R - Body ground Rear seat belt buckle switch RH signal Engine switch on (IG), rear seat belt RH unfastened Below 1 V
      Engine switch on (IG), rear seat belt RH fastened 11 to 14 V
      K3-39 (ILL-) - Body ground BE - Body ground Illumination signal Headlight dimmer switch off Below 1 V
      Headlight dimmer switch in tail or head position Pulse generation
      K3-40 (EP) - Body ground BR - Body ground Ground Always Below 1 Ω
      K4-1 (B) - Body ground B - Body ground Battery Always 11 to 14 V
      K4-2 (HZSW) - Body ground W - 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
      K4-3 (ER) - Body ground P - 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
      K4-4 (EL) - Body ground GR - 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
      K4-5 (TRNR) - Body ground R - 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
      K4-7 (LR) - Body ground R - Body ground Front and side turn signal light RH 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
      K4-9 (MSCL) - Body ground B - Body ground Local bus communication line - -
      K4-10 (MSCH) - Body ground R - Body ground Local bus communication line - -
      K4-11 (TRNL) - Body ground LG - Body ground Rear 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
      K4-12 (HAZM) - Body ground B - 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
      K4-13 (LL) - Body ground G - Body ground Front and side turn signal light LH 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
      K123-1 (GVIF) - Body ground*1 B - Body ground Video signal (Digital) - -
      1. *1: w/ Navigation System
      2. *2: for 8AR-FTS
      3. *3: for 2GR-FSE
      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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