SFI SYSTEM TERMINALS OF ECM


  1. SFI SYSTEM

    A017DNIE11

    Tech Tips

    The standard normal voltage between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals are also indicated.

    The check results should be compared with the standard normal voltage for that pair of terminals, listed in the "Specified Condition" column.

    The illustration above can be used as a reference to identify the ECM terminal locations.

    Terminal No. (Symbol) Wiring Color Terminal Description Condition Specified Condition
    D56-22 (+B) - B48-12 (E1) SB - W-B Power source of ECM Ignition switch on (IG) 11 to 14 V
    D56-23 (+B2) - B48-12 (E1) GR - W-B Power source of ECM Ignition switch on (IG) 11 to 14 V
    D56-24 (BATT) - B48-12 (E1) R - W-B Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V
    B48-23 (+BM) - B48-12 (E1) L - W-B Power source of electronic throttle control system throttle motor Always 11 to 14 V
    D56-9 (MREL) - B48-12 (E1) L - W-B EFI relay operation signal Ignition switch on (IG) 11 to 14 V
    D55-21 (IGSW) - B48-12 (E1) W - W-B Ignition switch signal Ignition switch on (IG) 11 to 14 V
    D56-3 (FC) - B48-12 (E1) P - W-B C/OPN relay operation signal (fuel pump control) Ignition switch on (IG) 11 to 14 V
    D55-18 (STP) - B48-12 (E1) R - W-B Stop light switch signal Brake pedal depressed 7.5 to 14 V
    R - W-B Stop light switch signal Brake pedal released Below 1.5 V
    D56-8 (ST1-) - B48-12 (E1) LG - W-B Stop light switch signal (opposite to STP terminal) Ignition switch on (IG), Brake pedal depressed Below 1.5 V
    LG - W-B Stop light switch signal (opposite to STP terminal) Ignition switch on (IG), Brake pedal released 7.5 to 14 V

    D55-13 (ACCR)*2- B48-12 (E1)

    		 BE - W-B ACC relay control signal Cranking Below 1.5 V
    D55-6 (VPA) - D55-3 (EPA) R - SB Accelerator pedal position sensor signal (for engine control) Ignition switch on (IG), Accelerator pedal fully released 0.5 to 1.1 V
    R - SB Accelerator pedal position sensor signal (for engine control) Ignition switch on (IG), Accelerator pedal fully depressed 2.6 to 4.5 V
    D55-5 (VPA2) - D55-1 (EPA2) GR - V Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully released 1.2 to 2.0 V
    GR - V Accelerator pedal position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully depressed 3.4 to 5.0 V
    D55-28 (TC) - B48-12 (E1) L - W-B Terminal TC of DLC3 Ignition switch on (IG) 11 to 14 V
    D55-4 (VCPA) - D55-3 (EPA) SB - SB Power source of accelerator pedal position sensor (for VPA) Ignition switch on (IG) 4.5 to 5.0 V
    D55-2 (VCP2) - D55-1 (EPA2) LG - V Power source of accelerator pedal position sensor (for VPA2) Ignition switch on (IG) 4.5 to 5.0 V
    B48-13 (VCTA) - B48-14 (ETA) Y - BR Power source of throttle position sensor Ignition switch on (IG) 4.5 to 5.0 V
    D55-29 (TACH) - B48-12 (E1) B - W-B Engine speed signal (for combination meter) Idling

    Pulse generation

    (see waveform 12)
    D56-18 (SPD) - B48-12 (E1) LG - W-B Vehicle speed signal from combination meter Ignition switch on (IG), driving wheel rotated slowly

    Pulse generation

    (see waveform 9)
    D56-13 (W) - B48-12 (E1) Y - W-B Malfunction Indicator Lamp (MIL) operation signal Ignition switch on (IG) Below 3.0 V
    Y - W-B Malfunction Indicator Lamp (MIL) operation signal Idling 11 to 14 V
    D55-32 (CANH) - B48-12 (E1) R - W-B CAN communication circuit Ignition switch on (IG)

    Pulse generation

    (see waveform 13)
    D55-31 (CANL) - B48-12 (E1) W - W-B CAN communication circuit Ignition switch on (IG)

    Pulse generation

    (see waveform 14)
    B48-12 (E1) - Body ground W-B - - Earth (ground) circuit of ECM Always Below 1 V

    B47-6 (#10) - B47-14 (E01)

    B47-1 (#20) - B47-14 (E01)

    B47-7 (#30) - B47-14 (E01)

    B47-2 (#40) - B47-14 (E01)

    B47-8 (#50) - B47-14 (E01)

    B47-3 (#60) - B47-14 (E01)

    L - W-B

    Y - W-B

    R-L - W-B

    W - W-B

    R - W-B

    G - W-B

    		 Fuel injector assembly operation signal Ignition switch on (IG) 11 to 14 V

    L - W-B

    Y - W-B

    R-L - W-B

    W - W-B

    R - W-B

    G - W-B

    		 Fuel injector assembly operation signal Idling

    Pulse generation

    (see waveform 3)
    B48-31 (STAR) - B48-12 (E1) GR - W-B Park/neutral position switch signal Ignition switch on (IG), Shift lever position P or N 11 to 14 V
    D55-10 (STA) - B48-12 (E1) B - W-B Starter relay operation signal Cranking 11 to 14 V

    D55-30 (STSW)*2- B48-12 (E1)

    		 P - W-B Starter relay operation signal Cranking 11 to 14 V
    B49-2 (NSW) - B48-12 (E1) B - W-B Park/neutral position switch signal Ignition switch on (IG), Shift lever in P or N Below 3.0 V
    B50-19 (OC2+) - B50-20 (OC2-) LG - P Camshaft timing oil control valve assembly operation signal (Intake side) Idling

    Pulse generation

    (see waveform 1)
    B49-19 (OC1+) - B49-20 (OC1-) Y - L Camshaft timing oil control valve assembly operation signal (Intake side) Idling

    Pulse generation

    (see waveform 1)
    B50-12 (VV2+) - B50-11 (VV2-) P - L VVT sensor signal (Intake side) Idling

    Pulse generation

    (see waveform 6)
    B50-9 (VV1+) - B50-10 (VV1-) G - R VVT sensor signal (Intake side) Idling

    Pulse generation

    (see waveform 6)
    B50-6 (NE+) - B50-5 (NE-) W - B Crankshaft position sensor signal Idling

    Pulse generation

    (see waveform 5)
    B50-18 (EV2+) - B50-17 (EV2-) L - R VVT sensor signal (Exhaust side) Idling

    Pulse generation

    (see waveform 5)
    B50-13 (EV1+) - B50-14 (EV1-) B - W VVT sensor signal (Exhaust side) Idling

    Pulse generation

    (see waveform 5)
    B49-21 (OE1+) - B49-22 (OE1-) G - R Camshaft timing oil control valve assembly operation signal (Intake side) Idling

    Pulse generation

    (see waveform 1)
    B50-21 (OE2+) - B50-22 (OE2-) P - W Camshaft timing oil control valve assembly operation signal (Intake side) Idling

    Pulse generation

    (see waveform 1)
    D55-8 (FPR) - B48-12 (E1) G - W-B Fuel pump control Cranking 11 to 14 V
    Idling Below 3 V
    B47-12 (HT1B) - B48-12 (E1) R - W-B Heated oxygen sensor heater operation signal Idling Below 3.0 V
    R - W-B Heated oxygen sensor heater operation signal Ignition switch on (IG) 11 to 14 V
    B47-9 (ACM) - B48-12 (E1) G - W-B VSV for active control mount system operation signal Ignition switch on (IG) 11 to 14 V
    B48-29 (M-) - B47-10 (ME01) L - W-B Throttle drive motor operation signal (negative terminal) Idling with warm engine

    Pulse generation

    (see waveform 11)
    B47-20 (M+) - B47-10 (ME01) R - W-B Throttle drive motor operation signal (positive terminal) Idling with warm engine

    Pulse generation

    (see waveform 10)
    B47-15 (E02) - Body ground W-B - - Earth (ground) circuit of ECM Always Below 1 V
    B47-14 (E01) - Body ground W-B - - Earth (ground) circuit of ECM Always Below 1 V

    B48-24 (IGT1) - B48-12 (E1)

    B48-25 (IGT2) - B48-12 (E1)

    B48-26 (IGT3) - B48-12 (E1)

    B48-27 (IGT4) - B48-12 (E1)

    B48-28 (IGT5) - B48-12 (E1)

    B49-25 (IGT6) - B48-12 (E1)

    Y - W-B

    P - W-B

    G - W-B

    L - W-B

    B - W-B

    LG - W-B

    		 Ignition coil assembly (ignition signal) Idling

    Pulse generation

    (see waveform 7)
    B48-30 (GE01) - B48-12 (E1) - - W-B Shielded earth (ground) circuit of throttle drive motor Always Below 1 V
    B50-2 (OX1B) - B50-1 (EX1B) B - BR Heated oxygen sensor signal With engine speed at 2500 rpm for 2 minutes after warming up

    Pulse generation

    (see waveform 2)
    B48-16 (VTA2) - B48-14 (ETA) LG - BR Throttle position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal released 2.1 to 3.1 V
    LG - BR Throttle position sensor signal (for sensor malfunction detection) Ignition switch on (IG), Accelerator pedal fully depressed 4.5 to 5.0 V
    B48-15 (VTA1) - B48-14 (ETA) B - BR Throttle position sensor signal (for engine control) Ignition switch on (IG), Accelerator pedal released 0.5 to 1.2 V
    B - BR Throttle position sensor signal (for engine control) Ignition switch on (IG), Accelerator pedal fully depressed 3.2 to 4.8 V
    B48-17 (THW) - B49-8 (ETHW) W - BR Engine coolant temperature sensor signal Idling, Engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
    B49-15 (THA) - B49-7 (ETHA) P - BR Intake air temperature sensor signal Idling, Intake air temperature 20°C (68°F) 0.5 to 3.4 V
    B50-15 (VCV1) - B48-12 (E1) Y - W-B Power source of sensors (specific voltage) Ignition switch on (IG) 4.5 to 5.0 V
    B50-16 (VCV2) - B48-12 (E1) Y - BR Power source of VVT sensor Ignition switch on (IG) 4.5 to 5.0 V
    B48-6 (IGF1) - B48-12 (E1) W - W-B Ignition coil assembly (ignition confirmation signal) Ignition switch on (IG) 4.5 to 5.0 V
    W - W-B Ignition coil assembly (ignition confirmation signal) Idling

    Pulse generation

    (see waveform 7)
    B48-20 (AICV) - B48-12 (E1) W - W-B VSV for air intake control system operation signal Ignition switch on (IG) 11 to 14 V
    B49-13 (E2G) - B48-12 (E1) Y - W-B Earth (ground) circuit of sensor for mass air flow meter sub-assembly Always Below 1 V
    B49-14 (VG) - B49-13 (E2G) R - Y Mass air flow meter sub-assembly signal Idling, Shift lever position P or N, A/C switch OFF 0.5 to 3.0 V
    B48-19 (ACIS) - B48-12 (E1) L - W-B Intake air control valve signal (acoustic control induction system) Ignition switch on (IG) 11 to 14 V
    B48-18 (PRG) - B48-12 (E1) G - W-B Purge VSV for EVAP system operation signal Ignition switch on (IG) 11 to 14 V
    G - W-B Purge VSV for EVAP system operation signal Idling

    Pulse generation

    (see waveform 8)
    B47-19 (HA2A) - B47-18 (E05) B - W-B Air fuel ratio sensor heater operation signal Idling Below 3.0 V
    B - W-B Air fuel ratio sensor heater operation signal Ignition switch on (IG) 11 to 14 V
    B47-17 (HA1A) - B47-16 (E04) L - W-B Air fuel ratio sensor heater operation signal Idling Below 3.0 V
    L - W-B Air fuel ratio sensor heater operation signal Ignition switch on (IG) 11 to 14 V
    B47-11 (E03) - B48-12 (E1) W-B - W-B Earth (ground) circuit of ECM Always Below 1 V
    B47-13 (HT2B) - B48-12 (E1) R - W-B Heated oxygen sensor heater operation signal Idling Below 3.0 V
    B47-13 (HT2B) - B48-12 (E1) R - W-B Heated oxygen sensor heater operation signal Ignition switch on (IG) 11 to 14 V
    B47-18 (E05) - B48-12 (E1) W-B - W-B Earth (ground) circuit of ECM Always Below 1 V
    B47-16 (E04) - B48-12 (E1) W-B - W-B Earth (ground) circuit of ECM Always Below 1 V
    B49-5 (KNK2) - B49-6 (EKN2) R - G Knock sensor signal With engine speed at 4000 rpm after warming up

    Pulse generation

    (see waveform 4)
    B48-1 (A1A+) - B48-12 (E1) BR - W-B Air fuel ratio sensor signal Ignition switch on (IG)

    3.3 V*1

    B48-7 (A2A+) - B48-12 (E1) P - W-B Air fuel ratio sensor signal Ignition switch on (IG)

    3.3 V*1

    B49-11 (KNK1) - B49-12 (EKNK) B - W Knock sensor signal With engine speed at 4000 rpm after warming up

    Pulse generation

    (see waveform 4)
    B48-2 (A1A-) - B48-12 (E1) Y - W-B Air fuel ratio sensor Ignition switch on (IG)

    3.0 V*1

    B48-8 (A2A-) - B48-12 (E1) L - W-B Air fuel ratio sensor Ignition switch on (IG)

    3.0 V*1

    B50-4 (OX2B) - B50-3 (EX2B) B - BR Heated oxygen sensor signal With engine speed at 2500 rpm for 2 minutes after warming up

    Pulse generation

    (see waveform 2)

    *1: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

    *2: w/ Smart Entry and Start System


    1. A017COOE14

      WAVEFORM 1


      1. Camshaft timing oil control valve assembly operation signal

        ECM Terminal Names Between OC1+ and OC1- , OC2+ and OC2- , OE1+ and OE1- , or OE2+ and OE2-
        Tester Ranges 5 V/DIV, 1 msec./DIV
        Conditions Idling
    2. A017BSSE16

      WAVEFORM 2


      1. Heated oxygen sensor signal

        ECM Terminal Names Between OX1B and EX1B, or OX2B and EX2B
        Tester Ranges 0.2 V/DIV, 200 msec./DIV
        Conditions With engine speed at 2500 rpm for 2 minutes after warming up

        Tech Tips

        In the Data List, item O2S B1S2 and O2S B2S2 shows the ECM input values from the heated oxygen sensor.

    3. A017DAHE04

      WAVEFORM 3


      1. Fuel injector assembly operation assembly signal

        ECM Terminal Names Between #10 (to 60) and E01
        Tester Ranges 30 V/DIV, 20 msec./DIV
        Conditions Idling

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    4. A017EPCE30

      WAVEFORM 4


      1. Knock sensor signal

        ECM Terminal Names Between KNK1 and EKNK, or KNK2 and EKN2
        Tester Ranges 0.01 to 10 V/DIV, 0.01 to 10 msec./DIV
        Conditions With engine speed at 4000 rpm after warming up

        Tech Tips


        • The wavelength becomes shorter as the engine speed increases.

        • The waveforms and amplitudes displayed differ slightly depending on the vehicle.

    5. A017EE2E07

      WAVEFORM 5


      1. Variable Valve Timing (VVT) sensor signal

      2. Crankshaft position sensor signal

        ECM Terminal Names

        (1) EV1+ and EV1-, or EV2+ and EV2-

        (2) Between NE+ and NE-
        Tester Ranges 5 V/DIV, 20 ms./DIV
        Conditions Idling

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    6. A017BNEE10

      WAVEFORM 6


      1. Variable Valve Timing (VVT) sensor signal

      2. Crankshaft position sensor signal

        ECM Terminal Names

        (1) Between VV1+ and VV1-, VV2+and VV2-

        (2) Between NE+ and NE-
        Tester Ranges 5 V/DIV, 20 ms./DIV
        Conditions Idling

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    7. A017E5ZE06

      WAVEFORM 7


      1. Igniter IGT signal (from ECM to igniter)

      2. Igniter IGF signal (from igniter to ECM)

        ECM Terminal Names

        (1) Between IGT (1 to 6) and E1

        (2) Between IGF1 and E1
        Tester Ranges 2 V/DIV, 20 msec./DIV
        Conditions Idling

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    8. A017FQME01

      WAVEFORM 8


      1. Purge VSV for EVAP system operation signal

        ECM Terminal Names Between PRG and E1
        Tester Ranges 10 V/DIV, 50 msec./DIV
        Conditions Idling

        Tech Tips

        If the waveform is not similar to that shown in the illustration, check the waveform again after idling for 10 minutes or more.

    9. A017BAGE14

      WAVEFORM 9


      1. Vehicle speed signal

        ECM Terminal Names Between SPD and E1
        Tester Ranges 2 V/DIV, 20 msec./DIV
        Conditions Ignition switch on (IG), driving wheel rotated slowly

        Tech Tips


        • The wavelength becomes shorter as the vehicle speed increases.

        • Depending on the vehicle, the output waveform voltage may rise to 12 V if influenced by optionally installed systems.

    10. A017G1LE16

      WAVEFORM 10


      1. Throttle drive motor operation signal (positive terminal)

        ECM Terminal Names Between M+ and ME01
        Tester Ranges 5 V/DIV, 1 msec./DIV
        Conditions Idling with warm engine

        Tech Tips

        The duty ratio varies depending on the throttle actuator operation.

    11. A017BCXE15

      WAVEFORM 11


      1. Throttle drive motor operation signal (negative terminal)

        ECM Terminal Names Between M- and ME01
        Tester Ranges 5 V/DIV, 1 msec./DIV
        Conditions Idling with warm engine

        Tech Tips

        The duty ratio varies depending on the throttle actuator operation.

    12. A017BYJE12

      WAVEFORM 12


      1. Engine speed signal

        ECM Terminal Names Between TACH and E1
        Tester Ranges 5 V/DIV, 10 msec./DIV
        Conditions Idling

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    13. A017EPVE01

      WAVEFORM 13


      1. CAN communication signal

        ECM Terminal Name Between CANH and E1
        Tester Range 1 V/DIV., 10 μs./DIV.
        Condition Ignition switch on (IG)

        Tech Tips

        The wavelength varies depending on the CAN communication signal.

    14. A017B5TE01

      WAVEFORM 14


      1. CAN communication signal

        ECM Terminal Name Between CANL and E1
        Tester Range 1 V/DIV., 10 μs./DIV.
        Condition Ignition switch on (IG)

        Tech Tips

        The wavelength varies depending on the CAN communication signal.