SFI SYSTEM (w/ EGR System) TERMINALS OF ECM


  1. SFI SYSTEM

    A01NHTFE03

    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 result of checks should be compared with the standard normal voltage for that pair of terminals, displayed 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
    A76-3 (+B) - D1-46 (E1) B - BR Power source of ECM Power switch on (IG) 11 to 14 V
    A76-4 (+B2) - D1-46 (E1) L - BR Power source of ECM Power switch on (IG) 11 to 14 V
    A76-15 (BATT) - D1-46 (E1) V - BR Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V
    D1-30 (+BM) - D1-46 (E1) L - BR Power source of electronic throttle control system throttle motor Always 11 to 14 V
    A76-21 (MREL) - D1-46 (E1) BE - BR EFI MAIN relay operation signal Power switch on (IG) 11 to 14 V
    D1-118 (VCTA) - D1-119 (ETA) R - LG Power source for throttle position sensor (specific voltage) Idling with warm engine 4.5 to 5.5 V
    D1-78 (VCV1) - D1-46 (E1) L - BR Power source for VVT sensor (specific voltage) Idling with warm engine 4.5 to 5.5 V
    D1-79 (VCV2) - D1-46 (E1) W-L - BR Power source for VVT sensor (specific voltage) Idling with warm engine 4.5 to 5.5 V
    A76-1 (IGSW) - D1-46 (E1) G - BR Power switch signal Power switch on (IG) 11 to 14 V
    A76-8 (FC) - D1-46 (E1) B - BR C/OPN relay operation signal (fuel pump control) Power switch on (IG) 11 to 14 V
    Idling with warm engine 0 to 1.5 V
    A76-42 (TC) - D1-46 (E1) L - BR Terminal TC of DLC3 Power switch on (IG) 11 to 14 V
    A76-28 (TACH) - D1-46 (E1) W - BR Engine speed signal (for combination meter assembly) Idling with warm engine

    Pulse generation

    (see waveform 10)
    A76-16 (W) - D1-46 (E1) BR - BR Malfunction Indicator Lamp (MIL) operation signal Power switch on (IG) Below 3.0 V
    Idling with warm engine 11 to 14 V
    A76-12 (CANH) - D1-46 (E1) G - BR CAN communication line Engine stopped and power switch on (IG)

    Pulse generation

    (see waveform 11)
    A76-25 (CANL) - D1-46 (E1) L - BR CAN communication line Engine stopped and power switch on (IG)

    Pulse generation

    (see waveform 12)
    D1-46 (E1) - Body ground BR - Body ground Earth (ground) circuit of ECM Always Below 1 Ω

    D1-19 (#10) - D1-57 (E01)

    D1-20 (#20) - D1-57 (E01)

    D1-53 (#30) - D1-57 (E01)

    D1-49 (#40) - D1-57 (E01)

    D1-21 (#50) - D1-57 (E01)

    D1-52 (#60) - D1-57 (E01)

    L - W-B

    Y - W-B

    B - W-B

    W - W-B

    B-W - W-B

    G - W-B

    		 Fuel injector assembly operation signal Power switch on (IG) 11 to 14 V
    Idling with warm engine

    Pulse generation

    (see waveform 3)
    D1-8 (OC2+) - D1-9 (OC2-) P - L Camshaft timing oil control valve assembly operation signal (bank 2) Idling

    Pulse generation

    (see waveform 1)
    D1-10 (OC1+) - D1-11 (OC1-) W - B Camshaft timing oil control valve assembly operation signal (bank 1) Idling

    Pulse generation

    (see waveform 1)
    D1-112 (VV2+) - D1-111 (VV2-) B - Y VVT sensor signal (bank 2) Idling with warm engine

    Pulse generation

    (see waveform 5)
    D1-109 (VV1+) - D1-110 (VV1-) P - LG VVT sensor signal (bank 1) Idling with warm engine

    Pulse generation

    (see waveform 5)
    D1-76 (NE+) - D1-77 (NE-) R - G Crankshaft position sensor signal Idling with warm engine

    Pulse generation

    (see waveform 5)
    D1-29 (M-) - D1-60 (ME01) W - W-B Throttle actuator operation signal (negative terminal) Idling with warm engine

    Pulse generation

    (see waveform 9)
    D1-28 (M+) - D1-60 (ME01) B - W-B Throttle actuator operation signal (positive terminal) Idling with warm engine

    Pulse generation

    (see waveform 8)
    D1-58 (E02) - Body ground BR - Body ground Earth (ground) circuit of ECM Always Below 1 Ω

    D1-138 (IGT1) - D1-46 (E1)

    D1-106 (IGT2) - D1-46 (E1)

    D1-139 (IGT3) - D1-46 (E1)

    D1-107 (IGT4) - D1-46 (E1)

    D1-105 (IGT5) - D1-46 (E1)

    D1-137 (IGT6) - D1-46 (E1)

    L - BR

    P - BR

    P - BR

    L - BR

    Y - BR

    W-L - BR

    		 Ignition coil assembly (ignition signal) Idling with warm engine

    Pulse generation

    (see waveform 6)
    D1-108 (GE01) - D1-46 (E1) BR - BR Shield earth (ground) circuit of throttle actuator Always Below 1 Ω

    D1-130 (OX1B) - D1-129 (EX1B)

    D1-98 (OX2B) - D1-97 (EX2B)

    W - BR

    B - BR

    		 Heated oxygen sensor signal Engine speed is maintained at 2500 rpm for 2 minutes after warming up engine

    Pulse generation

    (see waveform 2)
    D1-86 (VTA2) - D1-119 (ETA) L - LG Throttle position sensor signal (for sensor malfunction detection) Power switch on (IG), throttle valve fully closed 2.1 to 3.1 V
    D1-85 (VTA1) - D1-119 (ETA) Y - LG Throttle position sensor signal (for engine control) Power switch on (IG), throttle valve fully closed 0.5 to 1.1 V
    D1-90 (THW) - D1-122 (ETHW) G - BR Engine coolant temperature sensor signal Idling, engine coolant temperature 60 to 120°C (140 to 248°F) 0.2 to 1.0 V
    D1-96 (THA) - D1-128 (ETHA) L - B Intake air temperature sensor signal Idling, intake air temperature 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
    D1-54 (IGF1) - D1-46 (E1) W - BR Ignition coil assembly (ignition confirmation signal) Power switch on (IG) 4.5 to 5.0 V
    Idling with warm engine

    Pulse generation

    (see waveform 6)
    D1-121 (VG) - D1-120 (E2G) R - G Mass air flow meter sub-assembly signal Idling, shift lever in P or N, A/C switch off 0 to 3.0 V
    D1-140 (PRG) - D1-46 (E1) G - BR Purge VSV operation signal Power switch on (IG) 11 to 14 V
    Idling with warm engine

    Pulse generation

    (see waveform 7)
    D1-22 (HA2A) - D1-23 (E05) R - W-B Air fuel ratio sensor heater operation signal Idling Pulse generation (see waveform 13)
    D1-24 (HA1A) - D1-25 (E04) B-W - W-B Air fuel ratio sensor heater operation signal Idling Pulse generation (see waveform 13)
    D1-17 (HT2B) - D1-16 (E03) W - W-B Heated oxygen sensor heater operation signal Idling Pulse generation (see waveform 13)
    D1-18 (HT1B) - D1-16 (E03) R - W-B Heated oxygen sensor heater operation signal Idling Pulse generation (see waveform 13)
    D1-83 (KNK2) - D1-84 (EKN2) R - G Knock control sensor signal (bank 2) Engine speed maintained at 2500 rpm after warming up engine

    Pulse generation

    (see waveform 4)
    D1-116 (KNK1) - D1-117 (EKNK) B - W Knock control sensor signal (bank 1) Engine speed maintained at 2500 rpm after warming up engine

    Pulse generation

    (see waveform 4)
    D1-100 (A1A+) - D1-46 (E1) BR - BR Air fuel ratio sensor Power switch on (IG) 3.3 V*
    D1-132 (A1A-) - D1-46 (E1) Y - BR Air fuel ratio sensor Power switch on (IG) 3.0 V*
    D1-99 (A2A+) - D1-46 (E1) P - BR Air fuel ratio sensor Power switch on (IG) 3.3 V*
    D1-131 (A2A-) - D1-46 (E1) L - BR Air fuel ratio sensor Power switch on (IG) 3.0 V*
    A76-29 (FPR) - D1-46 (E1) R - BR Fuel pump control Cranking 11 to 14 V
    Idling 11 to 14 V
    A76-13 (CAN+) - D1-46 (E1) B - BR CAN communication line Engine stopped and power switch on (IG)

    Pulse generation

    (see waveform 11)
    A76-26 (CAN-) - D1-46 (E1) W - BR CAN communication line Engine stopped and power switch on (IG)

    Pulse generation

    (see waveform 12)
    D1-14 (EGR1) - D1-46 (E1) G - BR EGR valve assembly signal Racing engine

    Pulse generation

    (see waveform 14)
    D1-13 (EGR2) - D1-46 (E1) W-L - BR
    D1-12 (EGR3) - D1-46 (E1) G-R - BR
    D1-15 (EGR4) - D1-46 (E1) LG - BR
    D1-88 (VPIM) - D1-87 (EPIM) Y - BR Manifold absolute pressure sensor Power switch on (IG) 4.5 to 5.0 V
    D1-89 (PIM) - D1-87 (EPIM) P - BR Manifold absolute pressure sensor Power switch on (IG) 4.0 to 5.0 V
    A76-9 (GO1) - D1-46 (E1) W - BR Power management control ECU (HV CPU) (camshaft revolution signal) Idling

    Pulse generation

    (see waveform 15)
    A76-22 (GO2) - D1-46 (E1) B - BR MG ECU (camshaft revolution signal) Idling

    Pulse generation

    (see waveform 15)
    A76-14 (EC) - Body ground W-B - Body ground Earth (ground) circuit of ECM Always Below 1 Ω

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


    1. A01NGGIE01

      WAVEFORM 1


      1. Camshaft timing oil control valve assembly operation signal

        ECM Terminal Name Between OC1+ and OC1- or OC2+ and OC2-
        Tester Range 5 V/DIV., 1 ms./DIV.
        Condition Idling

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    2. A01NH8OE01

      WAVEFORM 2


      1. Heated oxygen sensor signal

        ECM Terminal Name Between OX1B and EX1B, or OX2B and EX2B
        Tester Range 0.2 V/DIV., 200 ms./DIV.
        Condition Engine speed is maintained at 2500 rpm for 2 minutes after warming up engine

        Tech Tips

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

    3. A01NF7PE01

      WAVEFORM 3


      1. Fuel injector assembly operation signal

        ECM Terminal Name Between #10 (to #60) and E01
        Tester Range 30 V/DIV., 20 ms./DIV.
        Condition Idling with warm engine

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    4. A01NGU4E01

      WAVEFORM 4


      1. Knock control sensor signal

        ECM Terminal Name Between KNK1 and EKNK, or KNK2 and EKN2
        Tester Range 1 V/DIV., 1 ms./DIV.
        Condition Engine speed maintained at 2500 rpm after warming up engine

        Tech Tips


        • The wavelength becomes shorter as the engine speed increases.

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

    5. A01NEBME01

      WAVEFORM 5


      1. Variable Valve Timing (VVT) sensor (A)

      2. Crankshaft position sensor signal (B)

        ECM Terminal Name

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

        (B) Between NE+ and NE-
        Tester Range 5 V/DIV., 20 ms./DIV.
        Condition Idling with warm engine

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    6. A01NG41E01

      WAVEFORM 6


      1. Igniter IGT signal (from ECM to igniter) and igniter IGF signal (from igniter to ECM)

        ECM Terminal Name

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

        (2) Between IGF1 and E1
        Tester Range 2 V/DIV., 20 ms./DIV.
        Condition Idling with warm engine

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    7. A01NFN0E03

      WAVEFORM 7


      1. Purge VSV operation signal

        ECM Terminal Name Between PRG and E1
        Tester Range 5 V/DIV., 50 ms./DIV.
        Condition Idling with warm engine

        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.

    8. A01ND9EE01

      WAVEFORM 8


      1. Throttle actuator operation signal (positive terminal)

        ECM Terminal Name Between M+ and ME01
        Tester Range 5 V/DIV., 1 ms./DIV.
        Condition Idling with warm engine

        Tech Tips

        The duty ratio varies depending on the throttle actuator operation.

    9. A01NHF2E01

      WAVEFORM 9


      1. Throttle actuator operation signal (negative terminal)

        ECM Terminal Name Between M- and ME01
        Tester Range 5 V/DIV., 1 ms./DIV.
        Condition Idling with warm engine

        Tech Tips

        The duty ratio varies depending on the throttle actuator operation.

    10. A01NEI7E01

      WAVEFORM 10


      1. Engine speed signal

        ECM Terminal Name Between TACH and E1
        Tester Range 5 V/DIV., 10 ms./DIV.
        Condition Idling with warm engine

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    11. A01NDKXE02

      WAVEFORM 11


      1. CAN communication signal

        ECM Terminal Name Between CANH and E1 or CAN+ and E1
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine stopped and power switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    12. A01NDL3E02

      WAVEFORM 12


      1. CAN communication signal

        ECM Terminal Name Between CANL and E1 or CAN- and E1
        Tester Range 1 V/DIV., 10 μsec./DIV.
        Condition Engine stopped and power switch on (IG)

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    13. A01NEJQE01

      WAVEFORM 13


      1. Air fuel ratio sensor and heated oxygen sensor heater operation signal

        ECM Terminal Name Between HA1A and E04, HA2A and E05, HT1B and E03 or HT2B and E03
        Tester Range 5 V/DIV., 10 ms./DIV.
        Condition Idling

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    14. A01NGPHE01

      WAVEFORM 14


      1. EGR valve assembly signal

        ECM Terminal Name Between EGR1, EGR2, EGR3, EGR4 and E1
        Tester Range 20 V/DIV., 50 ms./DIV.
        Condition Racing engine
    15. A01NEKWE01

      WAVEFORM 15


      1. Camshaft revolution signal from ECM to power management control ECU (HV CPU) or MG ECU

        ECM Terminal Name Between GO1 and E1 or GO2 and E1
        Tester Range 5 V/DIV., 20 ms./DIV.
        Condition Idling

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.