SFI SYSTEM (w/ Dual VVT-i) TERMINALS OF ECM

A003DYJE59

Tech Tips

The standard normal 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 normal voltage for that pair of terminals, displayed in the STD Voltages column. The illustration above can be used as a reference to identify the ECM terminal locations.

Terminal No. (Symbol) Wiring Color Terminal Descriptions Conditions STD Voltages
B94-1 (BATT) - D116-59 (E1) W - W-B Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V
D116-29 (+BM) - D116-59 (E1) Y - W-B Power source of throttle actuator Always 11 to 14 V
B94-6 (IGSW) - D116-59 (E1) B - W-B Ignition switch Ignition switch ON 11 to 14 V
B94-2 (+B) - D116-59 (E1) L - W-B Power source of ECM Ignition switch ON 11 to 14 V
B94-3 (+B2) - D116-59 (E1) L - W-B Power source of ECM Ignition switch ON 11 to 14 V
B94-46 (MREL) - D116-59 (E1) G - W-B EFI relay Ignition switch ON 11 to 14 V
D116-134 (VCTA) - D116-133 (ETA) L - Y Power source of throttle position sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V
D116-135 (VTA1) - D116-133 (ETA) R - Y

Throttle position sensor

(for engine control)

 Ignition switch ON, Accelerator pedal fully released 0.5 to 1.1 V
Ignition switch ON, Accelerator pedal fully depressed 3.3 to 4.9 V
D116-101 (VTA2) - D116-133 (ETA) G - Y

Throttle position sensor

(for sensor malfunction detection)

 Ignition switch ON, Accelerator pedal fully released 2.1 to 3.1 V
Ignition switch ON, Accelerator pedal fully depressed 4.5 to 5.0 V
B94-47 (VPA) - B94-48 (EPA) L - G

Accelerator pedal position sensor

(for engine control)

 Ignition switch ON, Accelerator pedal fully released 0.5 to 1.1 V
Ignition switch ON, Accelerator pedal fully depressed 2.6 to 4.5 V
B94-50 (VPA2) - B94-51 (EPA2) B - GR

Accelerator pedal position sensor

(for sensor malfunctioning detection)

 Ignition switch ON, Accelerator pedal fully released 1.2 to 2.0 V
Ignition switch ON, Accelerator pedal fully depressed 3.4 to 4.75 V
B94-49 (VCPA) - B94-48 (EPA) W - G

Power source of accelerator pedal position sensor

(for VPA)

 Ignition switch ON 4.5 to 5.5 V
B94-52 (VCP2) - B94-51 (EPA2) R - GR

Power source of accelerator pedal position sensor

(for VPA2)

 Ignition switch ON 4.5 to 5.5 V
D116-137 (VG) - D116-104 (E2G) Y-G - L Mass air flow meter Idling, Shift position P or N, A/C switch OFF 0.5 to 3.0 V
D116-138 (THA) - D116-139 (ETHA) R - Y Intake air temperature sensor Idling, Intake air temperature 20°C (68°F) 0.5 to 3.4 V
D116-120 (THW) - D116-119 (ETHW) R-W - Y Engine coolant temperature sensor Idling, Engine coolant temperature 80°C (176°F) 0.2 to 1.0 V
D116-78 (RTHW) - D116-76 (E2) L - Y Engine coolant temperature (radiator) sensor Idling, radiator side engine coolant temperature -20 to 80°C (-4 to 176°F) 0.5 to 4.5 V
D116-117 (VCIB) - D116-118 (EIB) Y - W Power source of battery current sensor (specific voltage) Ignition switch ON 4.5 to 5.5 V
D116-86 (IB) - D116-118 (EIB) Y - W Battery current sensor

Ignition switch ON

(Temperature of thermistor of battery current sensor: -30 to 90°C (-22 to 194°F))

 0.5 to 4.5 V
D116-87 (THB) - D116-118 (EIB) R - W Battery temperature sensor Ignition switch ON 0.5 to 4.5 V
D116-21 (#10) - D116-57 (E01) B - W-B Fuel injector Ignition switch ON 11 to 14 V
D116-18 (#20) - D116-57 (E01) L - W-B
D116-19 (#30) - D116-57 (E01) Y - W-B Idling

Pulse generation

(see waveform 1)
D116-20 (#40) - D116-57 (E01) R - W-B
D116-45 (IGT1) - D116-59 (E1) R-L - W-B

Ignition coil with igniter

(ignition coil signal)

 Idling

Pulse generation

(see waveform 2)
D116-44 (IGT2) - D116-59 (E1) L-W - W-B
D116-43 (IGT3) - D116-59 (E1) B-Y - W-B
D116-42 (IGT4) - D116-59 (E1) Y-R - W-B
D116-71 (IGF1) - D116-59 (E1) W-R - W-B

Ignition coil with igniter

(ignition confirmation signal)

 Ignition switch ON 4.5 to 5.0 V
Idling

Pulse generation

(see waveform 2)
D116-116 (VCV1) - D116-59 (E1) B-R - W-B

Power source of Camshaft position sensor (for intake side)

(specific voltage)

 Ignition switch ON 4.5 to 5.5 V
D116-82 (VV1+) - D116-115 (VV1-) L - Y Camshaft position sensor (for intake side) Idling with warm engine

Pulse generation

(see waveform 16)
D116-111 (VCE1) - D116-59 (E1) B-R - W-B

Power source of Camshaft position sensor (for exhaust side)

(specific voltage)

 Ignition switch ON 4.5 to 5.5 V
D116-80 (EV1+) - D116-112 (EV1-) G - R Camshaft position sensor (for exhaust side) Idling with warm engine

Pulse generation

(see waveform 16)
D116-114 (NE+) - D116-113 (NE-) W - B Crankshaft position sensor Idling with warm engine

Pulse generation

(see waveform 3)
B94-41 (FC) - D116-59 (E1) L - W-B Fuel pump control Ignition switch ON 11 to 14 V
Idling Below 1.5 V
D116-60 (M+) - D116-28 (ME01) Y - W-B Throttle actuator Idling with warm engine

Pulse generation

(see waveform 4)
D116-30 (M-) - D116-28 (ME01) L - W-B Throttle actuator Idling with warm engine

Pulse generation

(see waveform 5)
D116-100 (A1A+) - D116-59 (E1) Y - W-B A/F sensor Always (Ignition switch ON) 3.3 V*1
D116-132 (A1A-) - D116-59 (E1) L - W-B A/F sensor Always (Ignition switch ON) 3.0 V*1
D116-99 (OX1B) - D116-131 (EX1B) BR - Y Heated oxygen sensor Engine speed maintained 2500 rpm for 2 minutes after warming up sensor

Pulse generation

(see waveform 6)
D116-27 (HA1A) - D116-26 (E04) Y - W-B A/F sensor heater Idling Below 3.0 V
Ignition switch ON 11 to 14 V
D116-55 (HT1B) - D116-26 (E04) Y - W-B Heated oxygen sensor heater Idling Below 3.0 V
Ignition switch ON 11 to 14 V
D116-122 (KNK1) - D116-121 (EKNK) G - R Knock sensor Maintain engine speed 4000 rpm after warming up

Pulse generation

(see waveform 7)
D116-35 (OC1+) - D116-34 (OC1-) G - B Camshaft timing oil control valve (for intake side) Idling

Pulse generation

(see waveform 8)
D116-37 (OE1+) - D116-36 (OE1-) R - P Camshaft timing oil control valve (for exhaust side) Idling

Pulse generation

(see waveform 8)
D116-33 (PRG) - D116-59 (E1) B - W-B Purge VSV Ignition switch ON 11 to 14 V
Idling

Pulse generation

(see waveform 9)
B94-29 (STA) - D116-59 (E1) R - W-B Starter signal Shift position N, ignition switch START 5.5 V or more
B94-9 (STP) - D116-59 (E1) Y - W-B Stop light switch Brake pedal depressed 7.5 to 14 V
Brake pedal released Below 1.5 V
B94-10 (ST1-) - D116-59 (E1) R - W-B Stop light switch Ignition switch ON, Brake pedal depressed Below 1.5 V
Ignition switch ON, Brake pedal released 7.5 to 14 V
B94-34 (ELS2) - D116-59 (E1) B - W-B Electric load Defogger ON 7.5 to 14 V
Defogger OFF 0 to 1.5 V
B94-63 (ELS3) - D116-59 (E1) W - W-B Electric load Voltage inverter ON 7.5 to 14 V
Voltage inverter OFF 0 to 1.5 V
B94-31 (TACH) - D116-59 (E1) B - W-B Engine speed Idling

Pulse generation

(see waveform 10)
B94-44 (SPD) - D116-59 (E1) P - W-B Speed signal from combination meter Driving at 20 km/h (12 mph)

Pulse generation

(see waveform 11)
B94-33 (TC) - D116-59 (E1) G - W-B Terminal TC of DLC3 Ignition switch ON 11 to 14 V
D116-94 (PSW) - D116-59 (E1) G - W-B Power steering oil pressure switch While turning steering wheel Below 1.5 V
B94-23 (NSW) - D116-59 (E1) B - W-B Park/Neutral switch signal IG switch ON and shift lever in P or N position Below 1 V
IG switch ON and shift lever in any position except P and N 11 to 14 V
B94-13 (CANH) - D116-59 (E1) B - W-B Communication signal with other components Ignition switch ON

Pulse generation

(see waveform 13)
B94-26 (CANL) - D116-59 (E1) W - W-B Communication signal with other components Ignition switch ON

Pulse generation

(see waveform 14)
B94-21 (AIRV) - D116-59 (E1) Y - W-B Air switch valve for secondary air injection system Ignition switch ON 11 to 14 V
B94-20 (AIRP) - D116-59 (E1) W - W-B Air pump control Ignition switch ON 11 to 14 V
B94-16 (AIDI) - D116-59 (E1) LG - W-B Diagnostic information signal for secondary air injection system Secondary air injection system operates

Pulse generation

(see waveform 15)
B94-25 (HAI1) - D116-59 (E1) L - W-B Air pump heater for secondary air injection system Air pump heater operating 11 to 14 V
D116-129 (VCAI) - D116-130 (EAIP) L - Y

Power source of air pressure sensor

(specific voltage)

 Ignition switch ON 4.5 to 5.0 V
D116-98 (AIP) - D116-130 (EAIP) R - Y Air pressure sensor Ignition switch ON 0.5 to 4.5 V
B94-60 (RFC) - D116-59 (E1) LG - W-B Cooling fan control signal Ignition switch ON, A/C switch on (max cool) Pulse generation (See waveform 17)
B94-18 (INH) - D116-59 (E1) L - W-B Charge inhibit signal Front wiper switch HI 11 to 14 V
D116-31 (LIN) - D116-59 (E1) R - W-B LIN communication signal Ignition switch ON Pulse generation

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


  1. WAVEFORM 1


    1. A003G1OE03

      Fuel injector

      ECM Terminal Names Between #1 (to #4) and E01
      Tester Ranges 20 V/DIV, 20 msec./DIV
      Conditions Idling

      Tech Tips

      The wavelength becomes shorter as the engine speed increases.

  2. WAVEFORM 2


    1. A003BWIE05

      Igniter IGT signal (from ECM to igniter)

    2. Igniter IGF signal (from igniter to ECM)

      ECM Terminal Names

      1. Between IGT (1 to 4) 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.

  3. WAVEFORM 3


    1. A003GOIE04

      Crankshaft position sensor

      ECM Terminal Names Between NE+ and NE-
      Tester Ranges 5 V/DIV, 20 msec./DIV
      Conditions Idling

      Tech Tips

      The wavelength becomes shorter as the engine speed increases.

  4. WAVEFORM 4


    1. A003C6GE06

      Throttle actuator 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.

  5. WAVEFORM 5


    1. A003EQDE04

      Throttle actuator 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.

  6. WAVEFORM 6


    1. A003DLQE06

      Heated oxygen sensor

      ECM Terminal Names Between OX1B and E2
      Tester Ranges 0.2 V/DIV, 200 msec./DIV
      Conditions Engine speed maintained 2500 rpm for 2 minutes after warming up engine

      Tech Tips

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

  7. WAVEFORM 7


    1. A003C50E02

      Knock sensor

      ECM Terminal Names Between KNK1 and EKNK
      Tester Ranges 1 V/DIV, 1 msec./DIV
      Conditions Engine speed maintained 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.

  8. WAVEFORM 8


    1. A003DX0E03

      Camshaft timing oil control valve (OCV)

      ECM Terminal Names Between OC1+ and OC1-
      Tester Ranges 5 V/DIV, 1 msec./DIV
      Conditions idling

  9. WAVEFORM 9


    1. A003G18E02

      EVAP VSV

      ECM Terminal Names Between PRG and E01
      Tester Ranges 10 V/DIV, 20 msec./DIV
      Conditions 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


    1. A003FVEE02

      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.

  11. WAVEFORM 11


    1. A003GH3E03

      Vehicle speed signal

      ECM Terminal Names Between SPD and E1
      Tester Ranges 5 V/DIV, 20 msec./DIV
      Conditions Driving at 20 km/h (12 mph)

      Tech Tips

      The wavelength becomes shorter as the vehicle speed increases.

  12. WAVEFORM 12


    1. A003G6JE01

      Airbag sensor assembly

      ECM Terminal Names Between F/PS and E1
      Tester Ranges 5 V/DIV, 500 msec./DIV
      Conditions Idling with warm engine

  13. WAVEFORM 13


    1. A003GTEE02

      CAN communication signal

      ECM Terminal Names Between CANH and E1
      Tester Ranges 1 V/DIV, 10 μs/DIV
      Conditions Ignition switch ON

  14. WAVEFORM 14


    1. A003AJTE02

      CAN communication signal

      ECM Terminal Names Between CANL and E1
      Tester Ranges 1 V/DIV, 10 μs/DIV
      Conditions Ignition switch ON

  15. WAVEFORM 15


    1. A003C3RE01

      Terminal DI of air injection control driver

      ECM Terminal Names Between AIDI and E1
      Tester Ranges 5 V/DIV, 50 ms/DIV
      Conditions Performing Active Test using GTS (secondary air injection system)

      Tech Tips

      The wavelength changes when the air injection control driver detects malfunctions in the secondary air injection system Click here.

  16. WAVEFORM 16


    1. A003EDVE21

      Camshaft position sensor

      ECM Terminal Names

      1. Between VV1+ and VV1-

      2. Between EV1+ and EV1-
      Tester Ranges 5 V/DIV, 20 msec./DIV
      Conditions Idling

      Tech Tips

      The wavelength becomes shorter as the engine speed increases.

  17. WAVEFORM 17


    1. A003D3VE05

      Cooling Fan Control Signal

      ECM Terminal Names Between RFC and E1
      Tester Ranges 1 V/DIV, 20 msec./DIV
      Conditions Ignition switch ON, A/C switch on (max cool)

      Tech Tips

      The wavelength becomes shorter as the engine coolant temperature.