METER / GAUGE SYSTEM TERMINALS OF ECU


  1. COMBINATION METER ASSEMBLY

    A00073JE02

    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
      H13-1 (B) - Body ground R - Body ground Auxiliary battery Power switch off 11 to 14 V
      H13-3 (SW) - Body ground G - Body ground LH or RH turn signal switch signal (Input) Power switch on (IG), LH or RH turn signal switch off 11 to 14 V
      Power switch on (IG), LH or RH turn signal switch on Below 1 V
      H13-5 (HAZM) - Body ground R - Body ground Hazard warning switch signal (Input) Power switch on (IG), hazard warning switch not pressed Below 1 V
      Power switch on (IG), hazard warning switch pressed 11 to 14 V
      H13-7 (LL) - Body ground R - Body ground LH turn indicator light signal (Input) 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
      H13-9 (ER) - Body ground P - Body ground RH turn indicator light signal (Output) Power switch on (IG), RH turn switch off 11 to 14 V
      Power switch on (IG), RH turn switch on Below 1 V
      H13-10 (EL) - Body ground L - Body ground LH turn indicator light signal (Output) Power switch on (IG), LH turn switch off 11 to 14 V
      Power switch on (IG), LH turn switch on Below 1 V
      H13-11 (HZSW) - Body ground LG - Body ground Hazard warning switch signal (Output) Power switch on (IG), hazard warning switch not pressed 11 to 14 V
      Power switch on (IG), hazard warning switch pressed Below 1 V
      H13-13 (LR) - Body ground G - Body ground RH turn indicator light signal (Input) 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
      H14-1 (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
      H14-3 (LVWG) - Body ground B - Body ground Headlight leveling signal Power switch on (IG), headlight leveling warning light off 11 to 14 V
      Power switch on (IG), headlight leveling warning light on Below 1 V
      H14-5 (CHK) - 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
      H14-6 (RRBT)*1 - Body ground W - Body ground Rear seat belt indicator light RH 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
      H14-7 (RRSB)*1 - Body ground LG - Body ground Rear seat belt buckle switch center 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
      H14-8 (RCSB)*1 - Body ground L - Body ground Rear seat belt buckle switch center 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
      H14-9 (RLSB)*1 - Body ground Y - Body ground Rear seat belt buckle switch LH 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
      H14-10 (PBKL) - Body ground V*2 or Y*3 - 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
      H14-12 (S) - Body ground B - Body ground Oil pressure signal Power switch on (IG), oil pressure warning light off 11 to 14 V
      Power switch on (IG), oil pressure warning light on Below 1 V
      H14-18 (PBLT)*1 - Body ground G - Body ground Rear seat belt indicator light center 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
      H14-19 (+S) - Body ground V - Body ground Speed signal for other system (Output) Power switch on (IG), wheel being rotated

      Pulse generation

      (See waveform 1)
      H14-20 (SI) - Body ground W - Body ground Speed signal for other system (Input) Power switch on (IG), wheel being rotated

      Pulse generation

      (See waveform 1)
      H14-21 (IG+) - Body ground GR - Body ground Power switch signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      H14-22 (B) - Body ground W - Body ground Auxiliary battery Power switch off 11 to 14 V
      H14-24 (TR) - Body ground LG - Body ground Light control rheostat switch (Trip switch) signal Power switch on (IG), light control rheostat up or down switch not pressed 4 to 6 V
      Power switch on (IG), light control rheostat up or down switch pressed Below 1 V
      H14-26 (FR) - H14-27 (FE) GR - P Fuel level signal Power switch on (IG), fuel level warning off Below 1 V
      Power switch on (IG), fuel level warning on 4.5 to 9 V
      H14-28 (CANH) - Body ground G - Body ground CAN communication line - -
      H14-29 (CANL) - Body ground W - Body ground CAN communication line - -
      H14-30 (ES) - Body Ground BR - Body ground Ground Always Below 1 Ω
      H14-35 (RLBT)*1 - Body Ground R - Body ground Rear seat belt indicator light LH 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 Ω
      H14-36 (MSSL) - Body ground B - Body ground DISP switch (Steering pad switch assembly) signal Power switch on (IG), DISP switch not pressed 4 to 5 V
      Power switch on (IG), DISP switch pressed Below 1 V
      H14-37 (RSET) - Body ground P - Body ground ODO/TRIP switch (Trip switch) signal Power switch on (IG), ODO/TRIP switch not pressed 4 to 6 V
      Power switch on (IG), ODO/TRIP switch pressed Below 1 V
      H14-39 (ILL-) - Body ground GR - Body ground Illumination signal Headlight dimmer switch assembly off Below 1 V
      Headlight dimmer switch assembly tail or head position Pulse generation
      H14-40 (EP) - Body Ground W-B - Body ground Ground Always Below 1 Ω

      • *1: w/ Rear seat belt warning

      • *2: for LHD

      • *3: for RHD

    2. A0007JFE01

      Waveform 1 (Reference):

      Item Condition
      Tool setting 5 V/DIV., 20 ms./DIV.
      Vehicle condition 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. ACCESSORY METER ASSEMBLY (w/o Multi-display)

    A0004RHE02

    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
      H86-1 (ACC) - Body ground Y - Body ground Power switch signal Power switch off Below 1 V
      Power switch on (ACC) 11 to 14 V
      H86-2 (IG+) - Body ground G - Body ground Power switch signal Power switch off Below 1 V
      Power switch on (IG) 11 to 14 V
      H86-4 (B1) - Body ground R - Body ground Auxiliary battery Power switch off 11 to 14 V
      H86-6 (ADIM) - Body ground Y - Body ground Auto dimmer signal Power switch on (IG), headlight dimmer switch assembly off Below 1 V
      Power switch on (IG), headlight dimmer switch assembly in tail, head, or AUTO position at night 4 to 6 V
      H86-7 (CLK2) - H86-14 (CLK4) B - W Brightness switch (Radio receiver assembly) signal Brightness switch not pressed 11 to 14 V
      Brightness switch pressed Below 1 V
      H86-8 (ILL-) - Body ground GR - Body ground Illumination signal Headlight dimmer switch assembly off Below 1 V
      Headlight dimmer switch assembly in tail or head position Pulse generation
      H86-11 (LIN1) - Body ground B - Body ground LIN communication signal Power switch on (IG) Pulse generation
      H86-13 (TX2-) - Body ground R - Body ground AVC-LAN communication signal Always 11 to 14 V
      H86-16 (GND1) - Body ground W-B - Body ground Ground Always Below 1 Ω
      H86-15 (TX2+) - Body ground G - Body ground AVC-LAN communication signal Always Below 1 V