METER / GAUGE SYSTEM TERMINALS OF ECU


  1. COMBINATION METER ASSEMBLY

    A01FR7OE01

    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 Power switch on (IG), washer fluid level warning display off 11 to 14 V
      Power 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 Power switch on (IG), engine oil level warning display off 11 to 14 V
      Power 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 Power switch on (IG), MIL (Malfunction Indicator Light) off 11 to 14 V
      Power 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 Power switch on (IG), front passenger side seat belt fastened 11 to 14 V
      Power 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 Power switch on (IG), sitting on front passenger seat 11 to 14 V
      Power 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 Power switch on (IG), engine oil pressure warning display off 11 to 14 V
      Power switch on (IG), engine oil pressure warning display 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 Power switch signal (IG) Power switch off Below 1 V
      Power 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 Power switch on (IG), light control rheostat up switch off 4.6 to 5.3 V
      Power switch on (IG), light control rheostat up switch on Below 1 V
      Power switch on (IG), light control rheostat down switch off 4.6 to 5.3 V
      Power switch on (IG), 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 Power switch on (IG), parking brake switch off 11 to 14 V
      Power switch on (IG), parking brake switch on Below 1.5 V
      N40-33 (TX+) - Body ground* GR - Body ground Headup display communication signal Power switch on (IG) Pulse generation (See waveform 2)
      N40-34 (CS) - Body ground* L - Body ground Headup display communication signal Power switch on (IG) Pulse generation (See waveform 3)
      N40-36 (MSSL) - Body ground L - Body ground Steering pad switch (DISP) signal Power switch on (IG), steering pad switch (DISP) off 11 to 14 V
      Power switch on (IG), steering pad switch (DISP) on Below 1 V
      N40-37 (RSET) - Body ground G - Body ground ODO/TRIP switch signal Power switch on (IG), ODO/TRIP switch off 11 to 14 V
      Power switch on (IG), ODO/TRIP switch on Below 1 V
      N40-39 (ILL-) - Body ground W - Body ground Headlight dimmer switch (TAIL) signal Power switch on (IG), headlight dimmer switch off 11 to 14 V
      Power 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. A01FQTTE09

        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 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. A01FVSOE01

        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 Power switch on (IG)

        Tech Tips

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

      3. A01FQC7E01

        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 Power 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)

    A01FVPHE01

    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 Power switch signal (IG) Power switch on (IG) 11 to 14 V
      Power 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 Power switch signal (ACC) Power switch on (ACC) 11 to 14 V
      Power switch off 0 to 4.2 V
      P1-8 (TX-) - Body ground GR - Body ground Combination meter communication signal Power switch on (IG) Pulse generation (See waveform 1)
      P1-9 (CS) - Body ground L - Body ground Combination meter communication signal Power switch on (IG) Pulse generation (See waveform 2)
      P1-11 (MPX1) - Body ground P - Body ground Multi-media module receiver communication signal Power switch on (IG) Pulse generation
      P1-12 (MPX2) - Body ground R - Body ground Multi-media module receiver communication signal Power switch on (IG) Pulse generation
      P1-14 (SW1) - Body ground G - Body ground Headup display switch signal Power switch on (IG), headup display switch (HUD) off 4.7 to 5.5 V
      Power switch on (IG), headup display switch (HUD) on 0 to 0.6 V
      Power switch on (IG), headup display switch (DISP) off 4.7 to 5.5 V
      Power switch on (IG), headup display switch (DISP) on 0.8 to 1.6 V
      P1-15 (SW2) - Body ground Y - Body ground Headup display switch signal Power switch on (IG), headup display switch (contrast up) off 4.7 to 5.5 V
      Power switch on (IG), headup display switch (contrast up) on 0.8 to 1.6 V
      Power switch on (IG), headup display switch (contrast down) off 4.7 to 5.5 V
      Power switch on (IG), headup display switch (contrast down) on 0 to 0.6 V
      Power switch on (IG), headup display switch (position up) off 4.7 to 5.5 V
      Power switch on (IG), headup display switch (position up) on 3.1 to 4.1 V
      Power switch on (IG), headup display switch (position down) off 4.7 to 5.5 V
      Power switch on (IG), 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. A01FVSOE01

        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 Power switch on (IG)

        Tech Tips

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

      2. A01FQC7E01

        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 Power switch on (IG)

        Tech Tips

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

  3. COMBINATION METER ASSEMBLY INNER CIRCUIT

    A01FV60E03
    A01FVA1E01
    A01FU94E01
    A01FTFVE12