METER / GAUGE SYSTEM TERMINALS OF ECU


  1. COMBINATION METER ASSEMBLY

    B001KNVE03

    1. Measure the voltage, resistance and check for pulses according to the value(s) in the table below.

      Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
      H19-1 (MSCH)*1 - Body ground G - Body ground Local bus communication line - -
      H19-2 (MSCL)*1 - Body ground Y - Body ground Local bus communication line - -
      H19-3 (LVWG)*2 - Body ground L - Body ground Headlight leveling signal Power switch on (IG), headlight leveling indicator light off 11 to 14 V
      Power switch on (IG), headlight leveling indicator light on Below 1 V
      H19-4 (RRSB)*3 - Body ground R - Body ground Rear right seat belt buckle switch signal Power switch on (IG), rear seat belt buckle switch RH unfastened Below 1 V
      Power switch on (IG), rear seat belt buckle switch RH fastened 11 to 14 V
      H19-5 (RCSB)*3 - Body ground L - Body ground Rear center seat belt buckle switch signal Power switch on (IG), rear seat belt buckle switch center unfastened Below 1 V
      Power switch on (IG), rear seat belt buckle switch center fastened 11 to 14 V
      H19-6 (RLSB)*3 - Body ground B - Body ground Rear left seat belt buckle switch signal Power switch on (IG), rear seat belt buckle switch LH unfastened Below 1 V
      Power switch on (IG), rear seat belt buckle switch LH fastened 11 to 14 V
      H19-7 (WLVL) - Body ground LG - Body ground Washer fluid level signal Power switch on (IG), washer fluid level not low 4 to 6 V
      Power switch on (IG), washer fluid level low Below 1 V
      H19-8 (S) - Body ground G - Body ground Engine oil pressure signal Power switch on (IG), engine oil pressure warning light off 4 to 6 V
      Power switch on (IG), engine oil pressure warning light on Below 1 V
      H19-9 (E2) - Body ground W-B - Body ground Ground Always Below 1 Ω
      H19-10 (ILL-) - Body ground B - Body ground Illumination signal Power switch on (IG), light control switch in tail or head position Pulse generation
      H19-11 (ECOD) - Body ground P - Body ground Combination switch assembly signal Power switch on (IG), combination switch assembly not operated 11 to 14 V
      Power switch on (IG), combination switch assembly turns counterclockwise (on ECO position) Below 1 V
      H19-12 (IMAN) - Body ground R - Body ground Combination switch assembly signal Power switch on (IG), combination switch assembly not operated 11 to 14 V
      Power switch on (IG), combination switch assembly turns clockwise (on SPORT position) Below 1 V
      H19-13 (ACIN) - Body ground L - Body ground Rear passenger seat condition signal Power switch on (IG), rear passenger seat not occupied Below 1 V
      Power switch on (IG), any of rear passenger seat occupied 4 to 6 V
      H19-14 (REV) - Body ground G - Body ground Light control rheostat signal Power switch on (IG), light control rheostat turns fully upwards (MAX.) 8 kΩ or higher
      Power switch on (IG), light control rheostat position between (MIN.) and (MAX.) 50 to 8 kΩ
      Power switch on (IG), light control rheostat turns fully downwards (MIN.) Below 50 Ω
      H19-15 (TC) - H19-16 (SW1) L - SB Tail cancel signal Power switch on (IG), light control rheostat turns fully upwards (MAX.) 8 kΩ or higher
      Power switch on (IG), light control rheostat position except above Below 8 kΩ
      H19-16 (SW1) - Body ground SB - Body ground Light control rheostat signal Always 4 to 6 V
      H19-17 (MSM+)*1 - Body ground R - 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
      H19-19 (STRG)*4 - Body ground P*6 or R*7 - Body ground Steering pad switch assembly signal Power switch on (IG), DISP switch not pressed 4.8 to 5.2 V
      Power switch on (IG), DISP switch pressed Below 1 V
      H19-20 (MSTI)*1 - Body ground GR - 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
      H19-21 (IG2) - Body ground BR - Body ground Power switch signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      H19-22 (B) - Body ground V - Body ground Auxiliary battery Power switch off 11 to 14 V
      H19-23 (B) - Body ground G - Body ground Turn indicator light signal Power switch on (IG), turn signal RH indicator light off Below 1 V
      Power switch on (IG), turn signal RH indicator light blinking Below 1 V ←→ 11 to 14 V
      H19-24 (B) - Body ground Y - Body ground Turn indicator light signal Power switch on (IG), turn signal LH indicator light off Below 1 V
      Power switch on (IG), turn signal LH indicator light blinking Below 1 V ←→ 11 to 14 V
      H19-25 (RLMT)*3 - Body ground BE - Body ground Rear left seat belt warning output signal Power switch on (IG), rear seat belt indicator light LH off 11 to 14 V
      Power switch on (IG), rear seat belt indicator light LH on Below 1 V
      H19-26 (TWS3) - H19-9 (E2) GR - W-B Engine coolant temperature sensor signal Power switch on (IG), coolant temperature below 113°C (235°F) 0.2 to 4.8 V
      Power switch on (IG), coolant temperature below 120°C (248°F) Below 0.15 V
      H19-27 (L) - H19-30 (FE) SB - P Fuel signal Power switch on (IG), fuel level not low 4 to 14 V
      Power switch on (IG), fuel level low 4 V or less
      H19-28 (EFI) - Body ground R - Body ground MIL (Check engine warning light) signal Power switch on (IG), MIL off 11 to 14 V
      Power switch on (IG), MIL on Below 1 V
      H19-29 (P/SB) - Body ground B - Body ground Front passenger seat belt buckle switch signal Power switch on (IG), front passenger seat occupied, and front passenger seat belt unfastened Below 1 V
      Power switch on (IG), front passenger seat occupied, and front passenger seat belt fastened 11 to 14 V
      H19-31 (CANL) - Body ground V - Body ground CAN communication line - -
      H19-32 (CANH) - Body ground P - Body ground CAN communication line - -
      H19-33 (EP) - Body Ground W-B - Body ground Ground Always Below 1 Ω
      H19-34 (E2) - Body Ground G - Body ground Ground Always Below 1 Ω
      H19-35 (RRMT)*3 - Body ground BR - Body ground Rear right seat belt warning output signal Power switch on (IG), rear seat belt indicator light RH off 11 to 14 V
      Power switch on (IG), rear seat belt indicator light RH on Below 1 V
      H19-36 (SW3) - Body ground W - Body ground Ground Always Below 1 Ω
      H19-37 (TIRE)*5 - Body ground G - Body ground Tire pressure warning light signal Power switch on (IG), tire pressure warning light off 3.2 V or higher
      Power switch on (IG), tire pressure warning light on Below 3.2 V
      H19-38 (RCMT)*3 - Body ground Y - Body ground Rear center seat belt warning output signal Power switch on (IG), rear seat belt indicator light center off 11 to 14 V
      Power switch on (IG), rear seat belt indicator light center on Below 1 V
      H19-39 (SI) - Body ground V - Body ground Speed signal for other system (Input) Power switch on (IG), wheel being rotated

      Pulse generation

      (See waveform 1)
      H19-40 (+S) - Body ground V - Body ground Speed signal for other system (Output) Power switch on (IG), wheel being rotated

      Pulse generation

      (See waveform 1)
      H177-1 (GVIF) - Body ground*1 B - Body ground Video signal (Digital) line - -

      • *1: for Multi-information Display (Color Type)

      • *2: w/ Automatic Headlight Beam Level Control

      • *3: w/ Rear Seat Belt Warning

      • *4: for Multi-information Display (Monochrome Type)

      • *5: w/ Tire Pressure Warning System

      • *6: for LHD

      • *7: for RHD

    2. B001MH2E03

      Waveform 1 (Reference):

      Item Condition
      Tool setting 5 V/DIV., 20 ms./DIV.
      Vehicle condition Power switch on (IG), wheel being rotated

      Tech Tips

      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. COMBINATION METER ASSEMBLY INNER CIRCUIT

    B001ND4E01
    B001MM8E01
    B001KN8E01