METER / GAUGE SYSTEM TERMINALS OF ECU


  1. COMBINATION METER ASSEMBLY

    A01FE14E01

    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
      N40-1 (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
      N40-2 (OILW) - Body ground R - 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
      N40-5 (CHK) - Body ground B - Body ground MIL (Malfunction Indicator Light) signal Engine switch on (IG), MIL (Malfunction Indicator Light) off 11 to 14 V
      Engine switch on (IG), MIL (Malfunction Indicator Light) on 0 to 4.2 V
      N40-10 (PBKL) - Body ground P - Body ground Front passenger side seat belt buckle switch signal Engine switch on (IG), front passenger side seat belt fastened 11 to 14 V
      Engine switch on (IG), front passenger side seat belt unfastened Below 1 V
      N40-11 (PODS) - Body ground W - Body ground Front passenger seat condition signal Engine switch on (IG), sitting on front passenger seat 11 to 14 V
      Engine switch on (IG), not sitting on front passenger seat Below 1 V
      N40-12 (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
      N40-13 (CHG-) - Body ground B - 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
      N40-14 (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 B - Body ground Engine switch signal (IG) 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
      N40-24 (TR) - Body ground GR - 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
      N40-26 (FR) - Body ground BR - Body ground Fuel level signal Fuel level F Below 1 V
      Fuel level E 4.5 to 9 V
      N40-27 (FE) - Body ground W - Body ground Ground (Fuel ground) Always Below 1 Ω
      N40-30 (ES) - Body ground W-B - Body ground Ground (Signal ground) Always Below 1 Ω
      N40-31 (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
      N40-33 (TX+) - Body ground* GR - Body ground Headup display communication signal Engine switch on (IG) Pulse generation (See waveform 2)
      N40-34 (CS) - Body ground* L - Body ground Headup display communication signal Engine switch on (IG) Pulse generation (See waveform 3)
      N40-36 (MSSL) - Body ground L - Body ground Steering pad switch (DISP) signal Steering pad switch (DISP) off 11 to 14 V
      Steering pad switch (DISP) on Below 1 V
      N40-37 (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
      N40-39 (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

      • *: w/ Headup Display


      1. A01FEOME09

        Using an oscilloscope, check waveform 1.

        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 approx. 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. A01FIKEE01

        Using an oscilloscope, check waveform 2.

        Waveform 2 (Reference)
        Item Condition
        Tester connection N40-33 (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. A01FIGTE01

        Using an oscilloscope, check waveform 3.

        Waveform 3 (Reference)
        Item Condition
        Tester connection N40-34 (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.

  2. COMBINATION METER MIRROR ECU (HEADUP DISPLAY) (w/ Headup Display)

    A01FES3E01

    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
      P1-1 (IG) - Body ground L - Body ground Engine switch signal Engine switch on (IG) 11 to 14 V
      Engine switch off Below 1 V
      P1-2 (B) - Body ground P - Body ground Battery Always 11 to 14 V
      P1-4 (ES) - Body ground W-B - Body ground Ground Always Below 1 Ω
      P1-5 (ACC) - Body ground GR - Body ground Engine switch signal Engine switch on (ACC) 11 to 14 V
      Engine switch off 0 to 4.2 V
      P1-8 (TX-) - Body ground GR - Body ground Combination meter communication signal Engine switch on (IG) Pulse generation (See waveform 1)
      P1-9 (CS) - Body ground L - Body ground Combination meter communication signal Engine switch on (IG) Pulse generation (See waveform 2)
      P1-11 (MPX1) - Body ground P - Body ground Multi-media module receiver communication signal Engine switch on (IG) Pulse generation
      P1-12 (MPX2) - Body ground R - Body ground Multi-media module receiver communication signal Engine switch on (IG) Pulse generation
      P1-14 (SW1) - Body ground G - Body ground Headup display switch signal Headup display switch (HUD) off 4.7 to 5.5 V
      Headup display switch (HUD) on 0 to 0.6 V
      Headup display switch (DISP) off 4.7 to 5.5 V
      Headup display switch (DISP) on 0.8 to 1.6 V
      P1-15 (SW2) - Body ground Y - Body ground Headup display switch signal Headup display switch (contrast up) off 4.7 to 5.5 V
      Headup display switch (contrast up) on 0.8 to 1.6 V
      Headup display switch (contrast down) off 4.7 to 5.5 V
      Headup display switch (contrast down) on 0 to 0.6 V
      Headup display switch (position up) off 4.7 to 5.5 V
      Headup display switch (position up) on 3.1 to 4.1 V
      Headup display switch (position down) off 4.7 to 5.5 V
      Headup display switch (position down) on 1.8 to 2.7 V
      P1-16 (E) - Body ground B - Body ground Ground (Illumination ground) Always Below 1 Ω

      1. A01FIKEE01

        Using an oscilloscope, check waveform 1.

        Waveform 1 (Reference)
        Item Condition
        Tester connection P1-8 (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.

      2. A01FIGTE01

        Using an oscilloscope, check waveform 2.

        Waveform 2 (Reference)
        Item Condition
        Tester connection P1-9 (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.

  3. COMBINATION METER ASSEMBLY INNER CIRCUIT

    A01FFHSE01
    A01FE9RE01
    A01FDDCE01
    A01FDCNE07