СИСТЕМА SFI КОНТАКТЫ ECM

A00DT0RE07

Tech Tips

The standard voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard 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
A40-20 (BATT) - B39-104 (E1) P - BR Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V
A40-2 (+B) - B39-104 (E1) B - BR Power source of ECM Engine switch on (IG) 11 to 14 V
A40-3 (+BM) - B39-104 (E1) B - BR Power source of throttle actuator Always 11 to 14 V
B39-85 (IGT1) - B39-104 (E1) W-L - BR

Ignition coil

(ignition signal)

 Idling

Pulse generation

(see waveform 1)
B39-84 (IGT2) - B39-104 (E1) B - BR
B39-83 (IGT3) - B39-104 (E1) L-B - BR
B39-82 (IGT4) - B39-104 (E1) B - BR
B39-81 (IGF1) - B39-104 (E1) Y - BR

Ignition coil

(ignition confirmation signal)

 Engine switch on (IG) 4.5 to 5.5 V
Idling

Pulse generation

(see waveform 1)
B39-122 (NE+) - B39-121 (NE-) B - W Crankshaft position sensor Idling after engine warmed-up

Pulse generation

(see waveform 2)
B39-99 (G2+) - B39-98 (G2-) L - G Camshaft position sensor Idling after engine warmed-up

Pulse generation

(see waveform 2)
B39-108 (#10) - B39-104 (E1) L-B - BR Injector Engine switch on (IG) 11 to 14 V
B39-107 (#20) - B39-104 (E1) Y - BR Idling

Pulse generation

(see waveform 3)
B39-106 (#30) - B39-104 (E1) G - BR
B39-105 (#40) - B39-104 (E1) R-W - BR
A40-39 (NEO) - B39-104 (E1) R - BR Engine speed Idling after engine warmed-up

Pulse generation

(see waveform 4)
B39-110 (KNK1) - B39-111 (EKNK) G - R Knock sensor Engine speed maintained at 4000 rpm after warming up engine

Pulse generation

(see waveform 5)
A40-8 (SPD) - B39-104 (E1) Y - BR Speed signal from combination meter Vehicle being driven at 20 km/h (12 mph)

Pulse generation

(see waveform 6)
B39-97 (THW) - B39-96 (ETHW) B - BR Engine coolant temperature sensor Idling, engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
B39-65 (THA) - B39-88 (ETHA) P - BR-W Intake air temperature sensor Idling, intake air temperature 20°C (68°F) 0.5 to 3.4 V
B39-118 (VG) - B39-116 (E2G) V - R Mass air flow meter Idling, shift lever in P or N, A/C switch off 0.5 to 3.0 V
A40-24 (W) - B39-104 (E1) P - BR MIL Engine switch on (IG) (MIL goes off) Below 3.0 V
Idling 11 to 14 V
A40-48 (STA) - B39-104 (E1) LG - BR Starter signal Cranking 5.5 V or higher
B39-52 (NSW) - B39-104 (E1) G - BR Park/neutral position switch Engine switch on (IG), shift lever in P or N Below 1.5 V
Engine switch on (IG), shift lever not in P or N 6.0 V or higher
B39-115 (VTA1) - B39-91 (ETA) G - BR Throttle position sensor (for engine control) Engine switch on (IG), accelerator pedal released 0.5 to 1.1 V
Engine switch on (IG), accelerator pedal fully depressed 3.2 to 4.8 V
B39-114 (VTA2) - B39-91 (ETA) R - BR Throttle position sensor (for sensor malfunction detection) Engine switch on (IG), accelerator pedal released 2.1 to 3.1 V
Engine switch on (IG), accelerator pedal fully depressed 4.6 to 5.5 V
B39-67 (VCTA) - B39-91 (ETA) V - BR Power source of throttle position sensor (for VTA and VTA2) Engine switch on (IG) 4.5 to 5.5 V
A40-57 (VCPA) - A40-59 (EPA) P-L - R Power source of accelerator pedal position sensor (for VPA) Engine switch on (IG) 4.5 to 5.5 V
A40-55 (VPA) - A40-59 (EPA) L-W - R Accelerator pedal position sensor (for engine control) Engine switch on (IG), accelerator pedal released 0.5 to 1.1 V
Engine switch on (IG), accelerator pedal fully depressed 2.6 to 4.5 V
A40-56 (VPA2) - A40-60 (EPA2) Y - G Accelerator pedal position sensor (for sensor malfunction detection) Engine switch on (IG), accelerator pedal released 1.2 to 2.0 V
Engine switch on (IG), accelerator pedal fully depressed 3.4 to 5.0 V
A40-58 (VCP2) - A40-60 (EPA2) B - G Power source of accelerator pedal position sensor (for VPA2) Engine switch on (IG) 4.5 to 5.0 V
B39-42 (M+) - B39-43 (ME01) P - W-B Throttle actuator Idling with warm engine

Pulse generation

(see waveform 7)
B39-41 (M-) - B39-43 (ME01) L - W-B Throttle actuator Idling with warm engine

Pulse generation

(see waveform 8)
A40-36 (STP) - B39-104 (E1) V - BR Stop light switch Brake pedal depressed 11 to 14 V
Brake pedal released Below 1.5 V
A40-35 (ST1-) - B39-104 (E1) R-L - BR Stop light switch Engine switch on (IG), brake pedal depressed Below 1.5 V
Engine switch on (IG), brake pedal released 11 to 14 V
B39-49 (PRG) - B39-104 (E1) L-B - BR Purge VSV Engine switch on (IG) 11 to 14 V
Idling

Pulse generation

(see waveform 9)
A40-7 (FC) - B39-104 (E1) R - BR Fuel pump control Engine switch on (IG) 11 to 14 V
Idling Below 1.5 V
A40-15 (TACH) - B39-104 (E1) GR - BR Engine speed Idling

Pulse generation

(see waveform 10)
A40-27 (TC) - B39-104 (E1) P - BR Terminal TC of DLC3 Engine switch on (IG) 11 to 14 V
A40-41 (CANH) - B39-104 (E1) Y - BR CAN communication line Engine stopped and engine switch on (IG)

Pulse generation

(see waveform 11)
A40-49 (CANL) - B39-104 (E1) W - BR CAN communication line Engine stopped and engine switch on (IG)

Pulse generation

(see waveform 12)
A40-5 (CANP) - B39-104 (E1) W - BR CAN communication line Engine stopped and engine switch on (IG)

Pulse generation

(see waveform 11)
A40-4 (CANN) - B39-104 (E1) R - BR CAN communication line Engine stopped and engine switch on (IG)

Pulse generation

(see waveform 12)
A40-21 (FANL) - B39-104 (E1) R - BR FAN NO. 3 relay Engine switch on (IG) 11 to 14 V

Idling with A/C on

or

high engine coolant temperature

 Below 1.5 V
A40-22 (FANH) - B39-104 (E1) W - BR FAN NO. 1, 2 relay Idling with high engine coolant temperature Below 1.5 V
B39-50 (ALT) - B39-104 (E1) L - BR Generator Engine switch on (IG) 11 to 14 V
A40-28 (IGSW) - B39-104 (E1) B - BR Engine switch Engine switch on (IG) 11 to 14 V
A40-44 (MREL) - B39-104 (E1) W - BR EFI MAIN relay Engine switch on (IG) 11 to 14 V
B39-117 (VC) - B39-87 (EVAF) W - L Power source of variable resistor Engine switch on (IG) 4.5 to 5.5 V
B39-64 (VAF) - B39-87 (EVAF) R - L Variable resistor Engine switch on (IG) 0 to 5.0 V

  1. Waveform 1

    A00DQVFE01
    Igniter IGT Signal (from ECM to Igniter)
    ECM Terminal Name

    Between IGT (1 to 4) and E1

    Between IGF1 and E1
    Tester Range 2 V/DIV., 20 msec./DIV.
    Condition Idling

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  2. Waveform 2

    A00DU1PE01
    Crankshaft Position Sensor and Camshaft Position Sensor
    ECM Terminal Name

    CH1: Between G2+ and G2-

    CH2: Between NE+ and NE-
    Tester Range 5 V/DIV., 20 msec./DIV.
    Condition Idling after engine warmed-up

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  3. Waveform 3

    A00DS8BE02
    Injector No. 1 (to No. 4) Injector Signal
    ECM Terminal Name Between #10 (to #40) and E1
    Tester Range 20 V/DIV., 20 msec./DIV.
    Condition Idling

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  4. Waveform 4

    A00DU6ME02
    Engine Speed Signal
    ECM Terminal Name Between NEO and E1
    Tester Range 1 V/DIV., 2 msec./DIV.
    Condition Idling after engine warmed-up

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  5. Waveform 5

    A00DPUVE03
    Knock Sensor
    ECM Terminal Name Between KNK1 and EKNK
    Tester Range 1 V/DIV., 1 msec./DIV.
    Condition Engine speed maintained at 4000 rpm after engine warmed-up

    Tech Tips

    • The wavelength becomes shorter as the engine speed increases.

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

  6. Waveform 6

    A00DUQKE02
    Vehicle Speed Signal
    ECM Terminal Name Between SPD and E1
    Tester Range 5 V/DIV., 20 msec./DIV.
    Condition Vehicle being driven at 20 km/h (12 mph)

    Tech Tips

    The wavelength becomes shorter as the vehicle speed increases.

  7. Waveform 7

    A00DQINE03
    Throttle Actuator Positive Terminal
    ECM Terminal Name Between M+ and ME01
    Tester Range 5 V/DIV., 1 msec./DIV.
    Condition Idling after engine warmed-up

    Tech Tips

    The duty ratio varies depending on the throttle actuator operation.

  8. Waveform 8

    A00DSM4E03
    Throttle Actuator Negative Terminal
    ECM Terminal Name Between M- and ME01
    Tester Range 5 V/DIV., 1 msec./DIV.
    Condition Idling after engine warmed-up

    Tech Tips

    The duty ratio varies depending on the throttle actuator operation.

  9. Waveform 9

    A00DU6KE02
    Purge VSV
    ECM Terminal Name Between PRG and E1
    Tester Range 5 V/DIV., 50 msec./DIV.
    Condition Idling

    Tech Tips

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

  10. Waveform 10

    A00DR5CE01
    Engine Speed Signal
    ECM Terminal Name Between TACH and E1
    Tester Range 5 V/DIV., 10 msec./DIV.
    Condition Idling

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  11. Waveform 11

    A00DRK7E02
    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.

  12. Waveform 12

    A00DRA7E02
    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.