SFI SYSTEM TERMINALS OF ECM


  1. SFI SYSTEM

    A01CDXCE01

    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.

    Symbol (Terminal No.) Wiring Color Terminal Description Condition Specified Condition
    A8-2 (+B) - D1-81 (E1) B - BR Power source of ECM Engine switch on (IG) 11 to 14 V
    A8-1 (+B2) - D1-81 (E1) P - BR Power source of ECM Engine switch on (IG) 11 to 14 V
    A8-20 (BATT) - D1-81 (E1) V - BR Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V
    A8-3 (+BM) - D1-81 (E1) BR - BR Power source of electronic throttle control system throttle motor Always 11 to 14 V
    A8-44 (MREL) - D1-81 (E1) GR - BR EFI MAIN relay operation signal Engine switch on (IG) 11 to 14 V
    D1-96 (VCTA) - D1-97 (ETA) B - W Power source for throttle position sensor (specific voltage) Idling with warm engine 4.5 to 5.5 V
    D1-115 (VCV1) - D1-81 (E1) G-R - BR Power source for camshaft position (VVT) sensor (specific voltage) Idling with warm engine 4.5 to 5.5 V
    D1-114 (VCE1) - D1-81 (E1) GR - BR Power source for camshaft position (VVT) sensor (specific voltage) Idling with warm engine 4.5 to 5.5 V
    D1-112 (VCE2) - D1-81 (E1) Y - BR Power source for camshaft position (VVT) sensor (specific voltage) Idling with warm engine 4.5 to 5.5 V
    D1-113 (VCV2) - D1-81 (E1) V - BR Power source for camshaft position (VVT) sensor (specific voltage) Idling with warm engine 4.5 to 5.5 V
    A8-28 (IGSW) - D1-81 (E1) L - BR Ignition switch signal Engine switch on (IG) 11 to 14 V
    A8-7 (FC) - D1-81 (E1) L - BR C/OPN relay operation signal (fuel pump control) Engine switch on (IG) 11 to 14 V
    A8-7 (FC) - D1-81 (E1) L - BR C/OPN relay operation signal (fuel pump control) Idling with warm engine 0 to 1.5 V
    A8-36 (STP) - D1-81 (E1) R - BR Stop light switch signal Brake pedal depressed 7.5 to 14 V
    A8-36 (STP) - D1-81 (E1) R - BR Stop light switch signal Brake pedal released 0 to 1.5 V
    A8-35 (ST1-) - D1-81 (E1) W - BR Stop light switch signal (opposite to STP terminal) Engine switch on (IG), brake pedal depressed 0 to 1.5 V
    A8-35 (ST1-) - D1-81 (E1) W - BR Stop light switch signal (opposite to STP terminal) Engine switch on (IG), brake pedal released 7.5 to 14 V
    A8-13 (ACCR) - D1-81 (E1) GR - BR ACC relay control signal Cranking 0 to 1.5 V
    A8-55 (VPA) - A8-59 (EPA) V - R Accelerator pedal position sensor signal (for engine control) Engine switch on (IG), accelerator pedal fully released 0.5 to 1.1 V
    A8-55 (VPA) - A8-59 (EPA) V - R Accelerator pedal position sensor signal (for engine control) Engine switch on (IG), accelerator pedal fully depressed 2.6 to 4.5 V
    A8-56 (VPA2) - A8-60 (EPA2) Y - BR Accelerator pedal position sensor signal (for sensor malfunction detection) Engine switch on (IG), accelerator pedal fully released 1.2 to 2.0 V
    A8-56 (VPA2) - A8-60 (EPA2) Y - BR Accelerator pedal position sensor signal (for sensor malfunction detection) Engine switch on (IG), accelerator pedal fully depressed 3.4 to 4.8 V
    A8-27 (TC) - D1-81 (E1) R - BR Terminal TC of DLC3 Engine switch on (IG) 11 to 14 V
    A8-57 (VCPA) - A8-59 (EPA) P - R Power source of accelerator pedal position sensor (for VPA) Engine switch on (IG) 4.5 to 5.5 V
    A8-58 (VCP2) - A8-60 (EPA2) B - BR Power source of accelerator pedal position sensor (for VPA2) Engine switch on (IG) 4.5 to 5.5 V
    A8-15 (TACH) - D1-81 (E1) B - BR Engine speed signal (for combination meter) Idling with warm engine

    Pulse generation

    (see waveform 11)
    A8-8 (SPD) - D1-81 (E1) BE - BR Vehicle speed signal from combination meter Driving at 20 km/h (12 mph)

    Pulse generation

    (see waveform 8)
    A8-24 (W) - D1-81 (E1) G - BR Malfunction Indicator Lamp (MIL) operation signal Engine switch on (IG) Below 3.0 V
    A8-24 (W) - D1-81 (E1) G - BR Malfunction Indicator Lamp (MIL) operation signal Idling with warm engine 11 to 14 V
    A8-41 (CANH) - D1-81 (E1) B - BR CAN communication line Engine stopped and engine switch on (IG)

    Pulse generation

    (see waveform 12)
    A8-49 (CANL) - D1-81 (E1) W - BR CAN communication line Engine stopped and engine switch on (IG)

    Pulse generation

    (see waveform 13)
    D1-81 (E1) - Body ground BR - - Earth (ground) circuit of ECM Always Below 1 Ω

    D1-45 (#10) - D1-22 (E01)

    D1-85 (#20) - D1-22 (E01)

    D1-44 (#30) - D1-22 (E01)

    D1-84 (#40) - D1-22 (E01)

    D1-43 (#50) - D1-22 E01)

    D1-83 (#60) - D1-22 (E01)

    Y - BR

    W - BR

    B - BR

    L - BR

    L - BR

    G - BR

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

    D1-45 (#10) - D1-22 (E01)

    D1-85 (#20) - D1-22 (E01)

    D1-44 (#30) - D1-22 (E01)

    D1-84 (#40) - D1-22 (E01)

    D1-43 (#50) - D1-22 (E01)

    D1-83 (#60) - D1-22 (E01)

    Y - BR

    W - BR

    B - BR

    L - BR

    L - BR

    G - BR

    		 Fuel injector assembly operation signal Idling with warm engine

    Pulse generation

    (see waveform 3)
    A8-48 (STA) - D1-81 (E1) LG - BR Starter relay operation signal Cranking 5.5 V or more
    A8-14 (STSW) - D1-81 (E1) V - BR Starter relay operation signal Cranking 9 to 13 V
    D1-52 (OC2+) - D1-51 (OC2-) BR - B Camshaft timing oil control valve assembly operation signal (Intake side) Idling with warm engine

    Pulse generation

    (see waveform 1)
    D1-58 (OC1+) - D1-57 (OC1-) W - B Camshaft timing oil control valve assembly operation signal (Intake side) Idling with warm engine

    Pulse generation

    (see waveform 1)
    D1-67 (VV2+) - D1-90 (VV2-) W - B Camshaft position (VVT) sensor signal (Intake side) Idling with warm engine

    Pulse generation

    (see waveform 5)
    D1-69 (VV1+) - D1-92 (VV1-) P - L-B Camshaft position (VVT) sensor signal (Intake side) Idling with warm engine

    Pulse generation

    (see waveform 5)
    D1-111 (NE-) - D1-110 (NE+) R - G Crankshaft position sensor signal Idling with warm engine

    Pulse generation

    (see waveform 5)
    D1-110 (NE+) - D1-111 (NE-) G - R Crankshaft position sensor signal Idling with warm engine

    Pulse generation

    (see waveform 5)
    D1-66 (EV2+) - D1-89 (EV2-) R - L Camshaft position (VVT) sensor signal (Exhaust side) Idling with warm engine

    Pulse generation

    (see waveform 5)
    D1-68 (EV1+) - D1-91 (EV1-) Y - G Camshaft position (VVT) sensor signal (Exhaust side) Idling with warm engine

    Pulse generation

    (see waveform 5)
    D1-16 (OE1+) - D1-17 (OE1-) R - LG Camshaft timing oil control valve assembly operation signal (Exhaust side) Idling with warm engine

    Pulse generation

    (see waveform 1)
    D1-14 (OE2+) - D1-15 (OE2-) W - B Camshaft timing oil control valve assembly operation signal (Exhaust side) Idling with warm engine

    Pulse generation

    (see waveform 1)
    D1-18 (M-) - D1-20 (ME01) R - BR Throttle drive motor operation signal (negative terminal) Idling with warm engine

    Pulse generation

    (see waveform 10)
    D1-19 (M+) - D1-20 (ME01) G - BR Throttle drive motor operation signal (positive terminal) Idling with warm engine

    Pulse generation

    (see waveform 9)
    D1-21 (E02) - Body ground W-B - - Earth (ground) circuit of ECM Always Below 1 Ω
    D1-22 (E01) - Body ground BR - - Earth (ground) circuit of ECM Always Below 1 Ω

    D1-40 (IGT1) - D1-81 (E1)

    D1-39 (IGT2) - D1-81 (E1)

    D1-38 (IGT3) - D1-81 (E1)

    D1-37 (IGT4) - D1-81 (E1)

    D1-36 (IGT5) - D1-81 (E1)

    D1-35 (IGT6) - D1-81 (E1)

    W - BR

    G-R - BR

    G - BR

    LG - BR

    P - BR

    V - BR

    		 Ignition coil assembly (ignition signal) Idling with warm engine

    Pulse generation

    (see waveform 6)
    D1-41 (GE01) - D1-81 (E1) BR - BR Shielded earth (ground) circuit of throttle drive motor Always Below 1 V

    D1-88 (OX1B) - D1-65 (EX1B)

    D1-87 (OX2B) - D1-64 (EX2B)

    W - GR

    B - B-W

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

    Pulse generation

    (see waveform 2)
    D1-99 (VTA2) - D1-97 (ETA) GR - W Throttle position sensor signal (for sensor malfunction detection) Engine switch on (IG), accelerator pedal fully released 2.1 to 3.1 V
    D1-99 (VTA2) - D1-97 (ETA) GR - W Throttle position sensor signal (for sensor malfunction detection) Engine switch on (IG), accelerator pedal fully depressed 4.5 to 5.0 V
    D1-98 (VTA1) - D1-97 (ETA) Y - W Throttle position sensor signal (for engine control) Engine switch on (IG), throttle valve fully closed 0.5 to 1.2 V
    D1-98 (VTA1) - D1-97 (ETA) Y - W Throttle position sensor signal (for engine control) Engine switch on (IG), throttle valve fully open 3.2 to 4.8 V
    D1-79 (THW) - D1-78 (ETHW) L - BR Engine coolant temperature sensor signal Idling, engine coolant temperature 60 to 120°C (140 to 248°F) 0.2 to 1.0 V
    D1-71 (THA) - D1-74 (ETHA) P - G-R Intake air temperature sensor signal Idling, intake air temperature 0 to 80°C (32 to 176°F) 0.5 to 3.4 V
    D1-106 (IGF1) - D1-81 (E1) Y - BR Ignition coil assembly (ignition confirmation signal) Engine switch on (IG) 4.5 to 5.0 V
    D1-106 (IGF1) - D1-81 (E1) Y - BR Ignition coil assembly (ignition confirmation signal) Idling with warm engine

    Pulse generation

    (see waveform 6)
    D1-73 (E2G) - D1-81 (E1) LG - BR Earth (ground) circuit of sensor for mass air flow meter sub-assembly Always Below 1 V
    D1-72 (VG) - D1-73 (E2G) GR - LG Mass air flow meter signal Idling, shift lever in P or N, A/C switch off 0 to 3.0 V
    D1-107 (ACIS) - D1-81 (E1) R - BR VSV for ACIS (Acoustic Control Induction System) operation signal Engine switch on (IG) 11 to 14 V
    D1-108 (PRG) - D1-81 (E1) L - BR Purge VSV for EVAP system operation signal Engine switch on (IG) 11 to 14 V
    D1-108 (PRG) - D1-81 (E1) L - BR Purge VSV for EVAP system operation signal Idling with warm engine

    Pulse generation

    (see waveform 7)
    D1-109 (HA2A) - D1-46 (E05) B - BR Air fuel ratio sensor heater operation signal Idling Pulse generation (see waveform 16)
    D1-86 (HA1A) - D1-23 (E04) G - W-B Air fuel ratio sensor heater operation signal Idling Pulse generation (see waveform 16)
    D1-20 (ME01) - D1-81 (E1) BR - BR Earth (ground) circuit of ECM Always Below 1 V
    D1-104 (E03) - D1-81 (E1) BR - BR Earth (ground) circuit of ECM Always Below 1 V

    D1-47 (HT2B) - D1-81 (E1)

    D1-48 (HT1B) - D1-81 (E1)

    Y - BR

    LG - BR

    		 Heated oxygen sensor heater operation signal Idling Pulse generation (see waveform 16)
    D1-46 (E05) - D1-81 (E1) BR - BR Earth (ground) circuit of ECM Always Below 1 V
    D1-23 (E04) - D1-81 (E1) W-B - BR Earth (ground) circuit of ECM Always Below 1 V
    D1-62 (NSW) - D1-81 (E1) L-B - BR Park/Neutral position switch assembly signal Engine switch on (IG), shift lever in P or N Below 3.0 V
    D1-62 (NSW) - D1-81 (E1) L-B - BR Park/Neutral position switch assembly signal Engine switch on (IG), shift lever in any position other than P or N 11 to 14 V
    D1-118 (KNK2) - D1-117 (EKN2) B - W Knock control sensor signal Engine speed is maintained at 4000 rpm after engine is warmed up

    Pulse generation

    (see waveform 4)
    D1-95 (KNK1) - D1-94 (EKNK) R - G Knock control sensor signal Engine speed is maintained at 4000 rpm after engine is warmed up

    Pulse generation

    (see waveform 4)
    D1-93 (A1A+) - D1-81 (E1) W - BR Air fuel ratio sensor Engine switch on (IG) 3.3 V*
    D1-116 (A1A-) - D1-81 (E1) BR - BR Air fuel ratio sensor Engine switch on (IG) 3.0 V*
    D1-120 (A2A+) - D1-81 (E1) L - BR Air fuel ratio sensor Engine switch on (IG) 3.3 V*
    D1-119 (A2A-) - D1-81 (E1) Y - BR Air fuel ratio sensor Engine switch on (IG) 3.0 V*

    D1-87 (OX2B) - D1-64 (EX2B)

    D1-88 (OX1B) - D1-65 (EX1B)

    B - B-W

    W - GR

    		 Heated oxygen sensor signal With engine speed at 2500 rpm for 2 minutes after sensor is warmed up

    Pulse generation

    (see waveform 2)
    D1-24 (P) - D1-81 (E1) V - BR P shift position switch signal Engine switch on (IG) and shift lever in P 11 to 14 V
    Engine switch on (IG) and shift lever in any position other than P 0 to 1.5 V
    D1-25 (R) - D1-81 (E1) R - BR R shift position switch signal Engine switch on (IG) and shift lever in R 11 to 14 V
    Engine switch on (IG) and shift lever in any position other than R 0 to 1.5 V
    D1-27 (N) - D1-81 (E1) L-B - BR N shift position switch signal Engine switch on (IG) and shift lever in N 11 to 14 V
    Engine switch on (IG) and shift lever in any position other than N 0 to 1.5 V
    D1-26 (D) - D1-81 (E1) L - BR D shift position switch signal Engine switch on (IG) and shift lever in D 11 to 14 V
    Engine switch on (IG) and shift lever in any position other than D 0 to 1.5 V
    A8-25 (S) - D1-81 (E1) BR - BR S shift position switch signal Engine switch on (IG) and shift lever in S 11 to 14 V
    Engine switch on (IG) and shift lever in any position other than S 0 to 1.5 V
    A8-51 (SFTD) - D1-81 (E1) GR - BR Down shift switch signal Engine switch on (IG) and shift lever in S 11 to 14 V
    Engine switch on (IG) and shift lever in S, the "-" range (down shift) selected 0 to 1.5 V
    A8-16 (SFTU) - D1-81 (E1) P - BR Up shift switch signal Engine switch on (IG) and shift lever in S 11 to 14 V
    Engine switch on (IG) and shift lever in S, the "+" range (up shift) selected 0 to 1.5 V
    D1-80 (VCIB) - D1-101 (EIB) LG - P Battery current sensor Engine switch on (IG) 4.5 to 5.5 V
    D1-100 (IB) - D1-101 (EIB) R - P Battery current sensor Engine switch on (IG) 0.5 to 4.5 V
    D1-103 (THB) - D1-101 (EIB) G-R - P Battery current sensor Engine switch on (IG) 0.5 to 4.5 V
    D1-63 (STAR) - D1-81 (E1) G-R - BR Park/neutral position switch signal Engine switch on (IG), shift lever in any position other than P or N 11 to 14 V
    D1-63 (STAR) - D1-81 (E1) G-R - BR Park/neutral position switch signal Cranking, shift lever in P or N 0 to 3.0 V
    D1-59 (FPR) - D1-81 (E1) W - BR Fuel pump control Cranking 11 to 14 V
    D1-59 (FPR) - D1-81 (E1) W - BR Fuel pump control Idling 11 to 14 V
    D1-2 (CAN+) - D1-81 (E1) B - BR CAN communication line Engine stopped and engine switch on (IG)

    Pulse generation

    (see waveform 14)
    D1-1 (CAN-) - D1-81 (E1) W - BR CAN communication line Engine stopped and engine switch on (IG)

    Pulse generation

    (see waveform 15)
    A8-48 (STA) - D1-81 (E1) LG - BR Starter signal Cranking 11 to 14 V

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


    1. A01CGI5E31

      WAVEFORM 1


      1. Camshaft timing oil control valve assembly operation signal

        ECM Terminal Name Between OC1+ and OC1- , OC2+ and OC2- , OE1+ and OE1- , or OE2+ and OE2-
        Tester Range 5 V/DIV, 1 msec./DIV
        Condition Idling with warm engine

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    2. A01CEC1E31

      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 msec./DIV.
        Condition Engine speed is maintained at 2500 rpm for 2 minutes after sensor is warmed up

        Tech Tips

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

    3. A01CAZEE10

      WAVEFORM 3


      1. Fuel injector assembly operation signal

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

        Tech Tips

        The wavelength becomes shorter as the engine rpm increases.

    4. A01CDF0E60

      WAVEFORM 4


      1. Knock control sensor signal

        ECM Terminal Name Between KNK1 and EKNK, or KNK2 and EKN2
        Tester Range 0.01 to 10 V/DIV., 0.01 to 10 msec./DIV.
        Condition Engine speed is maintained at 4000 rpm after engine is warmed up

        Tech Tips


        • The wavelength becomes shorter as the engine speed increases.

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

    5. A01CFDSE01

      WAVEFORM 5


      1. Camshaft position (VVT) sensor, crankshaft position sensor signal

        ECM Terminal Name

        (a) Between VV1+ and VV1- or EV1+ and EV1-

        (b) Between VV2+ and VV2- or EV2+ and EV2-

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

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    6. A01CAV3E01

      WAVEFORM 6


      1. Ignition, ignition confirmation signal

        ECM Terminal Name

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

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

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    7. A01CE7GE05

      WAVEFORM 7


      1. Purge VSV for EVAP system operation signal

        ECM Terminal Name Between PRG and E1
        Tester Range 10 V/DIV., 50 msec./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. A01CGFSE08

      WAVEFORM 8


      1. Vehicle speed signal

        ECM Terminal Name Between SPD and E1
        Tester Range 2 V/DIV., 20 msec./DIV.
        Condition Driving at 20 km/h (12 mph)

        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.

    9. A01CBRXE18

      WAVEFORM 9


      1. Throttle drive motor operation signal (positive terminal)

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

        Tech Tips

        The duty ratio varies depending on the throttle actuator operation.

    10. A01CG0VE17

      WAVEFORM 10


      1. Throttle drive motor operation signal (negative terminal)

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

        Tech Tips

        The duty ratio varies depending on the throttle actuator operation.

    11. A01CDTVE15

      WAVEFORM 11


      1. Engine speed signal

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

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.

    12. A01CFPAE17

      WAVEFORM 12


      1. CAN communication signal

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

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    13. A01CGIEE19

      WAVEFORM 13


      1. CAN communication signal

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

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    14. A01CFPAE21

      WAVEFORM 14


      1. CAN communication signal

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

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    15. A01CGIEE21

      WAVEFORM 15


      1. CAN communication signal

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

        Tech Tips

        The waveform varies depending on the CAN communication signal.

    16. A01CFVCE01

      WAVEFORM 16


      1. Air fuel ratio 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 msec./DIV.
        Condition Idling with warm engine

        Tech Tips

        The wavelength becomes shorter as the engine speed increases.