METER / GAUGE SYSTEM TERMINALS OF ECU


  1. COMBINATION METER ASSEMBLY

    B005BBMN11

    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 Engine switch on (IG), enter, top and back switches on steering pad switch assembly not pushed 4.8 to 5.2 V
      Engine 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 Engine switch on (IG), up, down, right, and left switches on steering pad switch assembly not pushed 4.8 to 5.2 V
      Engine 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 Engine switch on (IG), ODO/TRIP switch not pushed 4 to 6 V
      Engine switch on (IG), ODO/TRIP switch pushed Below 1 V
      I10-5 (EPB) - Body ground R - Body ground Parking brake switch signal Engine switch on (IG), parking brake switch is off 11 to 14 V
      Engine switch on (IG), parking brake switch is on Below 1.5 V
      I10-6 (P/SB) - Body ground*6 L - Body ground Front passenger seat belt buckle switch signal Engine switch on (IG), front passenger side seat occupied, front passenger seat belt unfastened Below 1 V
      Engine switch on (IG), front passenger side seat occupied, front passenger seat belt fastened 11 to 14 V
      I10-9 (S) - Body ground*7 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*7 B - Body ground Ground Always Below 1 Ω
      I10-15 (OILW) - Body ground*8 B - 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
      I10-16 (WLVL) - Body ground LG - 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
      I10-17 (SW) - Body ground BE - Body ground Brake warning light signal Engine switch on (IG), brake warning light off 11 to 14 V
      Engine switch on (IG), brake warning light on 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 Engine switch signal Engine switch off Below 1 V
      Engine switch on (IG) 10.5 to 16 V*4
      11 to 14 V*5
      I10-22 (B) - Body ground Y - Body ground Battery Always 11 to 14 V
      I10-25 (TR) - Body ground V - Body ground Trip switch signal Engine switch on (IG), up switch and down switch of trip switch not pushed 4.6 to 5.3 V
      Engine switch on (IG), up switch of trip switch pushed Below 1 V
      Engine 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 Engine switch on (IG), fuel level F Below 1 V
      Engine 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*1 R - Body ground Headup display communication signal Engine switch on (IG) Pulse generation (See waveform 2)
      I10-33 (CS) - Body ground*1 Y - Body ground Headup display communication signal Engine switch on (IG) Pulse generation (See waveform 3)
      I10-38 (INT) - Body ground*2 LG - Body ground Tire pressure warning reset switch Engine switch on (IG), tire pressure warning reset switch off 8 to 15 V
      Engine switch on (IG), tire pressure warning reset switch on Below 1 V
      I10-39 (ILL-) - Body ground P - Body ground Illumination signal Engine switch on (IG), headlight dimmer switch off 11 to 14 V
      Engine 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 Always 11 to 14 V
      I11-2 (HZSW) - Body ground B - Body ground Hazard warning switch signal Engine switch on (IG), hazard warning switch not pressed 11 to 14 V
      Engine switch on (IG), hazard warning switch pressed Below 1 V
      I11-3 (ER) - Body ground L - 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
      I11-4 (EL) - Body ground R - 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
      I11-5 (TRNR) - Body ground SB - Body ground RH turn indicator light 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
      I11-7 (LR) - Body ground L - Body ground RH turn indicator light 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
      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) 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
      I11-12 (HAZM) - Body ground R - Body ground Hazard warning signal switch signal (Output) Engine switch on (IG), hazard warning signal switch not pressed Below 1 V
      Engine 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) 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
      I105-1 (GVIF) - Body ground*3 B - Body ground GVIF communication line - -

      *1: w/ Headup Display

      *2: w/ Tire Pressure Warning System

      *3: except 8 Speakers

      *4: w/ Stop and Start System

      *5: w/o Stop and Start System

      *6: w/ Occupamt Classification System

      *7: for 3ZR-FAE

      *8: for 8AR-FTS


      1. B0057K6N02

        Using an oscilloscope, check waveform 1.

        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)

        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. B005AEJE03

        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 Engine switch on (IG)

        Tech Tips

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

      3. B0059KME03

        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 Engine switch on (IG)

        Tech Tips

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