СИСТЕМА SFI КОНТАКТЫ ECM

A01UF04N58

Tech Tips

The standard voltage, resistance and waveform between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals is also indicated. The result of checks should be compared with the standard voltage, resistance and waveform for each pair of the terminals as 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
A53-1 (BATT) - D1-59 (E1) R - BR Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V
A53-2 (+B) - D1-59 (E1) W - BR Power source of ECM Engine switch on (IG) 11 to 14 V
A53-3 (+B2) - D1-59 (E1) B - BR Power source of ECM Engine switch on (IG) 11 to 14 V
A53-6 (IGSW) - D1-59 (E1) R - BR Ignition switch signal Engine switch on (IG) 11 to 14 V
A53-7 (FANL) - D1-59 (E1) G - BR Cooling fan motor operation signal (low) Engine switch on (IG) 11 to 14 V
Idling with A/C on, or high engine coolant temperature Below 1.5 V
A53-8 (FANH) - D1-59 (E1) SB - BR Cooling fan motor operation signal (high) Engine switch on (IG) 11 to 14 V
Idling with high engine coolant temperature Below 1.5 V
A53-9 (STP) - D1-59 (E1) B - BR Stop light switch assembly signal Brake pedal depressed 11 to 14 V
Brake pedal released Below 1.5 V
A53-10 (ST1-) - D1-59 (E1) LG - BR

Stop light switch assembly signal

(opposite of voltage at STP terminal)

Engine switch on (IG),

brake pedal depressed

 Below 1.5 V

Engine switch on (IG),

brake pedal released

 7.5 to 14 V
A53-13 (CANH) - D1-59 (E1) B - BR CAN communication line Engine switch on (IG)

Pulse generation

(See waveform 1)
A53-23 (NSW) - D1-59 (E1) W - BR Park/Neutral position switch assembly signal Engine switch on (IG), shift lever in P or N Below 1.0 V
Engine switch on (IG), shift lever not in P or N 11 to 14 V
A53-26 (CANL) - D1-59 (E1) W - BR CAN communication line Engine switch on (IG)

Pulse generation

(See waveform 2)
A53-29 (STA) - D1-59 (E1) R - BR Starter assembly signal Cranking 6.0 V or higher
A53-30 (NEO) - D1-59 (E1) GR - BR Engine speed signal sent to certification ECU (smart key ECU assembly) Idling with warm engine

Pulse generation

(See waveform 3)
A53-31 (TACH) - D1-59 (E1) R - BR Engine speed signal Idling with warm engine

Pulse generation

(See waveform 4)
A53-32 (EC) - Body ground W-B - - Earth (ground) circuit of ECM Always Below 1 Ω
A53-33 (TC) - D1-59 (E1) SB - BR Terminal TC of DLC3 Engine switch on (IG) 11 to 14 V
A53-41 (FC) - D1-57 (E01) L - BR Fuel pump control Engine switch on (IG) 11 to 14 V
Idling Below 1.5 V
A53-44 (SPD) - D1-59 (E1) BE - BR Vehicle speed signal from combination meter assembly signal Driving at 20 km/h (12 mph)

Pulse generation

(See waveform 5)
A53-46 (MREL) - D1-59 (E1) Y - BR EFI-MAIN relay operation signal Engine switch on (IG) 11 to 14 V
A53-47 (VPA) - A53-48 (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

Engine switch on (IG),

accelerator pedal fully depressed

 2.6 to 4.5 V
A53-49 (VCPA) - A53-48 (EPA) P - R Power source of accelerator pedal position sensor (for VPA) Engine switch on (IG) 4.5 to 5.5 V
A53-50 (VPA2) - A53-51 (EPA2) Y - BR Accelerator pedal position sensor signal

Engine switch on (IG),

accelerator pedal fully released

 1.2 to 2.0 V

Engine switch on (IG),

accelerator pedal fully depressed

 3.4 to 4.75 V
A53-52 (VCP2) - A53-51 (EPA2) B - BR Power source of accelerator pedal position sensor (for VPA2) Engine switch on (IG) 4.5 to 5.5 V
D1-18 (#20) - D1-57 (E01) R - BR No. 2 fuel injector assembly signal Engine switch on (IG) 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 6)
D1-19 (#30) - D1-57 (E01) G - BR No. 3 fuel injector assembly signal Engine switch on (IG) 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 6)
D1-20 (#40) - D1-57 (E01) L - BR No. 4 fuel injector assembly signal Engine switch on (IG) 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 6)
D1-21 (#10) - D1-57 (E01) Y - BR No. 1 fuel injector assembly signal Engine switch on (IG) 11 to 14 V
Idling with warm engine

Pulse generation

(See waveform 6)
D1-24 (IA1-) - D1-57 (E01) L - BR Intake air control valve actuator (for tumble control valve) Idling with cold engine

Pulse generation

(See waveform 7)
D1-25 (IA1+) - D1-57 (E01) Y - BR Intake air control valve actuator (for tumble control valve) Idling with cold engine

Pulse generation

(See waveform 8)
D1-26 (E04) - Body ground BR - - Earth (ground) circuit of ECM Always Below 1 Ω
D1-27 (HA1A) - D1-26 (E04) R - BR Air fuel ratio sensor heater operation signal Idling with cold engine

Pulse generation

(See waveform 9)
Engine switch on (IG) 11 to 14 V
D1-28 (ME01) - Body ground W-B - - Earth (ground) circuit of ECM Always Below 1 Ω
D1-29 (+BM) - D1-59 (E1) L - BR Power source of throttle actuator Always 11 to 14 V
D1-30 (M-) - D1-28 (ME01) G - W-B Throttle actuator operation signal (negative terminal) Idling with warm engine

Pulse generation

(See waveform 10)
D1-32 (ACIS) - D1-57 (E01) G - BR Vacuum switching valve assembly (for acoustic control induction system) operation signal Engine switch on (IG) 11 to 14 V
D1-33 (PRG) - D1-57 (E01) B - BR Purge VSV operation signal Engine switch on (IG) 11 to 14 V
Idling, under purge control

Pulse generation

(See waveform 11)
D1-35 (OC1+) - D1-34 (OC1-) P - V Camshaft timing oil control valve assembly (for intake camshaft) operation signal Idling

Pulse generation

(See waveform 12)
D1-37 (OE1+) - D1-36 (OE1-) GR - V Camshaft timing oil control valve assembly (for exhaust camshaft) operation signal Idling

Pulse generation

(See waveform 13)
D1-42 (IGT4) - D1-59 (E1) B - BR No. 4 ignition coil assembly signal (ignition signal) Idling with warm engine

Pulse generation

(See waveform 14)
D1-43 (IGT3) - D1-59 (E1) G - BR No. 3 ignition coil assembly signal (ignition signal) Idling with warm engine

Pulse generation

(See waveform 14)
D1-44 (IGT2) - D1-59 (E1) Y - BR No. 2 ignition coil assembly signal (ignition signal) Idling with warm engine

Pulse generation

(See waveform 14)
D1-45 (IGT1) - D1-59 (E1) W - BR No. 1 ignition coil assembly signal (ignition signal) Idling with warm engine

Pulse generation

(See waveform 14)
D1-55 (HT1B) - D1-26 (E04) R - BR Heated oxygen sensor heater operation signal Idling Below 3.0 V
Engine switch on (IG) 11 to 14 V
D1-57 (E01) - Body ground BR - - Earth (ground) circuit of ECM Always Below 1 Ω
D1-58 (E02) - Body ground BR - - Earth (ground) circuit of ECM Always Below 1 Ω
D1-59 (E1) - Body ground BR - - Earth (ground) circuit of ECM Always Below 1 Ω
D1-60 (M+) - D1-28 (ME01) R - W-B Throttle actuator operation signal (positive terminal) Idling with warm engine

Pulse generation

(See waveform 15)
D1-71 (IGF1) - D1-59 (E1) R - BR Ignition coil assembly (ignition confirmation signal) Engine switch on (IG) 4.5 to 5.5 V
Idling with warm engine

Pulse generation

(See waveform 14)
D1-80 (EV1+) - D1-112 (EV1-) Y - W Camshaft position sensor (for exhaust camshaft) signal Idling with warm engine

Pulse generation

(See waveform 16)
D1-81 (VCNE) - D1-59 (E1) P - BR Power source of crankshaft position sensor Engine switch on (IG) 4.5 to 5.5 V
D1-82 (VV1+) - D1-115 (VV1-) Y - P Camshaft position sensor (for intake camshaft) signal Idling with warm engine

Pulse generation

(See waveform 16)
D1-96 (VCIA) - D1-59 (E1) L - BR Power source of tumble control valve position sensor (specific voltage) Engine switch on (IG) 4.5 to 5.5 V
D1-97 (IAC1) - D1-95 (EIA1) R - B Tumble control valve position sensor Engine switch off to on (IG) 3.0 to 4.0 V
D1-99 (OX1B) - D1-131 (EX1B) B - W Heated oxygen sensor signal Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

Pulse generation

(See waveform 17)
D1-100 (A1A+) - D1-59 (E1) B - BR Air fuel ratio sensor signal Engine switch on (IG) 3.3 V*
D1-101 (VTA2) - D1-133 (ETA) G - W Throttle position sensor signal (for sensor malfunction detection)

Engine switch on (IG),

accelerator pedal fully released

 2.1 to 3.1 V

Engine switch on (IG),

accelerator pedal fully depressed

 4.6 to 5.0 V
D1-108 (GE01) - Body ground L - - Shielded earth (ground) circuit of throttle actuator Always Below 1 Ω
D1-111 (VCE1) - D1-59 (E1) B - BR Power source of camshaft position sensor (for exhaust camshaft) (specific voltage) Engine switch on (IG) 4.5 to 5.5 V
D1-114 (NE+) - D1-113 (NE-) R - V Crankshaft position sensor signal Idling with warm engine

Pulse generation

(See waveform 18)
D1-116 (VCV1) - D1-59 (E1) V - BR Power source of camshaft position sensor (for intake camshaft) (specific voltage) Engine switch on (IG) 4.5 to 5.5 V
D1-120 (THW) - D1-119 (ETHW) Y - B Engine coolant temperature sensor signal Idling, engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
D1-122 (KNK1) - D1-121 (EKNK) B - W Knock control sensor signal Engine speed maintained at 4000 rpm after warming up engine

Pulse generation

(See waveform 19)
D1-132 (A1A-) - D1-59 (E1) W - BR Air fuel ratio sensor signal Engine switch on (IG) 2.9 V*
D1-134 (VCTA) - D1-133 (ETA) B - W Power source of throttle position sensor (specific voltage) Engine switch on (IG) 4.5 to 5.5 V
D1-135 (VTA1) - D1-133 (ETA) P - W Throttle position sensor signal (for engine control)

Engine switch on (IG),

accelerator pedal fully released

 0.5 to 1.1 V

Engine switch on (IG),

accelerator pedal fully depressed

 3.2 to 4.8 V
D1-137 (VG) - D1-104 (E2G) W - P Mass air flow meter sub-assembly signal Idling, shift lever in P or N, A/C switch off 0.5 to 3.0 V
D1-138 (THA) - D1-139 (ETHA) R - V Intake air temperature sensor signal Idling, intake air temperature 20°C (68°F) 0.5 to 3.4 V

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


  1. WAVEFORM 1

    A01UELHE01
    *a 1 V/DIV.
    *b 10 μs./DIV.
    CAN Communication Signal (Reference)
    ECM Terminal Name Between CANH and E1
    Tester Range 1 V/DIV., 10 μs./DIV.
    Condition Engine switch on (IG)

    Tech Tips

    The waveform varies depending on the CAN communication signal.

  2. WAVEFORM 2

    A01UEPXE02
    *a 1 V/DIV.
    *b 10 μs./DIV.
    CAN Communication Signal (Reference)
    ECM Terminal Name Between CANL and E1
    Tester Range 1 V/DIV., 10 μs./DIV.
    Condition Engine switch on (IG)

    Tech Tips

    The waveform varies depending on the CAN communication signal.

  3. WAVEFORM 3

    A01UCQLE08
    *a 5 V/DIV.
    *b 2 ms./DIV.
    Engine Speed Signal
    ECM Terminal Name Between NEO and E1
    Tester Range 5 V/DIV., 2 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  4. WAVEFORM 4

    A01UDI3E01
    *a 5 V/DIV.
    *b 10 ms./DIV.
    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.

  5. WAVEFORM 5

    A01UF8SE01
    *a 5 V/DIV.
    *b 20 ms./DIV.
    Vehicle Speed Signal
    ECM Terminal Name Between SPD and E1
    Tester Range 5 V/DIV., 20 ms./DIV.
    Condition Driving at 20 km/h (12 mph)

    Tech Tips

    The wavelength becomes shorter as the vehicle speed increases.

  6. WAVEFORM 6

    A01UDJ4E01
    *1 20 V/DIV.
    *2 20 ms./DIV.
    No. 1 (to No. 4) Fuel Injector Assembly Signal
    ECM Terminal Name Between #10 (to #40) and E01
    Tester Range 20 V/DIV., 20 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  7. WAVEFORM 7

    A01UCCYE01
    *a 5 V/DIV.
    *b 1 ms./DIV.
    Negative Terminal of Intake Air Control Valve Actuator (for Tumble Control Valve) Signal
    ECM Terminal Name Between IA1- and E01
    Tester Range 5 V/DIV., 1 ms./DIV.
    Condition Idling with cold engine

  8. WAVEFORM 8

    A01UCGEE01
    *a 5 V/DIV.
    *b 1 ms./DIV.
    Positive Terminal of Intake Air Control Valve Actuator (for Tumble Control Valve) Signal
    ECM Terminal Name Between IA1+ and E01
    Tester Range 5 V/DIV., 1 ms./DIV.
    Condition Idling with cold engine

  9. WAVEFORM 9

    A01UDFIE06
    *a 5 V/DIV.
    *b 10 ms./DIV.
    Air Fuel Ratio Sensor Heater Operation Signal
    ECM Terminal Name Between HA1A and E04
    Tester Range 5 V/DIV., 10 ms./DIV.
    Condition Idling with cold engine

  10. WAVEFORM 10

    A01UEAFE01
    *a 5 V/DIV.
    *b 1 ms./DIV.
    Throttle Actuator Negative Terminal Signal
    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.

  11. WAVEFORM 11

    A01UCT6E09
    *1 10 V/DIV.
    *2 20 ms./DIV.
    Purge VSV Operation Signal
    ECM Terminal Name Between PRG and E01
    Tester Range 10 V/DIV., 20 ms./DIV.
    Condition Idling, under purge control

    Tech Tips

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

  12. WAVEFORM 12

    A01UCDIE01
    *a 5 V/DIV.
    *b 1 ms./DIV.
    Camshaft Timing Oil Control Valve Assembly (for Intake Camshaft) Operation Signal
    ECM Terminal Name Between OC1+ and OC1-
    Tester Range 5 V/DIV., 1 ms./DIV.
    Condition Idling

  13. WAVEFORM 13

    A01UCDIE01
    *a 5 V/DIV.
    *b 1 ms./DIV.
    Camshaft Timing Oil Control Valve Assembly (for Exhaust Camshaft) Operation Signal
    ECM Terminal Name Between OE1+ and OE1-
    Tester Range 5 V/DIV., 1 ms./DIV.
    Condition Idling

  14. WAVEFORM 14

    A01UEUSE01
    *a 2 V/DIV.
    *b 20 ms./DIV.
    Ignition Coil Assembly Signal (IGT and IGF1 Signal)
    ECM Terminal Name

    CH1: Between IGT (1 to 4) and E1

    CH2: 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.

  15. WAVEFORM 15

    A01UF4GE44
    *a 5 V/DIV.
    *b 1 ms./DIV.
    Throttle Actuator Positive Terminal Signal
    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.

  16. WAVEFORM 16

    A01UDHCE16
    *a 5 V/DIV.
    *b 20 ms./DIV.
    Camshaft Position Sensor Signal
    ECM Terminal Name

    CH1: Between VV1+ and VV1-

    CH2: Between EV1+ and EV1-
    Tester Range 5 V/DIV., 20 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  17. WAVEFORM 17

    A01UF9KE01
    *1 0.2 V/DIV.
    *2 200 ms./DIV.
    Heated Oxygen Sensor Signal
    ECM Terminal Name Between OX1B and EX1B
    Tester Range 0.2 V/DIV., 200 ms./DIV.
    Condition Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

    Tech Tips

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

  18. WAVEFORM 18

    A01UEN9E09
    *a 2 V/DIV.
    *b 20 ms./DIV.
    Crankshaft Position Sensor Signal
    ECM Terminal Name Between NE+ and NE-
    Tester Range 2 V/DIV., 20 ms./DIV.
    Condition Idling with warm engine

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  19. WAVEFORM 19

    A01UCPCE06
    *a 1 V/DIV.
    *b 1 ms./DIV.
    Knock Control Sensor Signal
    ECM Terminal Name Between KNK1 and EKNK
    Tester Range 1 V/DIV., 1 ms./DIV.
    Condition Engine speed maintained at 4000 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 condition.