SFI SYSTEM TERMINALS OF ECM

A342925E01
Tip:

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 the terminals, which is 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

A62-1 (BATT) - B93-59 (E1)

W - BR

Battery (for measuring battery voltage and for ECM memory)

Always

11 to 14 V

A62-2 (+B) - B93-59 (E1)

R - BR

Power source of ECM

Ignition switch ON

11 to 14 V

A62-3 (+B2) - B93-59 (E1)

P - BR

Power source of ECM

Ignition switch ON

11 to 14 V

A62-5 (ELS1) - B93-59 (E1)

G - BR

Electric load signal

Taillight switch on

7.5 to 14 V

Taillight switch off

Below 1.5 V

A62-6 (IGSW) - B93-59 (E1)

B - BR

Ignition switch signal

Ignition switch ON

11 to 14 V

A62-7 (FANL) - B93-59 (E1)

R - BR

FAN NO.3 relay operation signal

Ignition switch ON

11 to 14 V

Idling with A/C on or high engine coolant temperature

Below 1.5 V

A62-8 (FANH) - B93-59 (E1)

W - BR

FAN NO.1 and NO.2 relay operation signal

Idling with high engine coolant temperature

Below 1.5 V

A62-9 (STP) - B93-59 (E1)

L - BR

Stop light switch assembly signal

Brake pedal depressed

7.5 to 14 V

Brake pedal released

Below 1.5 V

A62-10 (ST1-) - B93-59 (E1)

GR - BR

Stop light switch assembly signal

(opposite to voltage at STP terminal)

Ignition switch ON, Brake pedal depressed

Below 1.5 V

Ignition switch ON, Brake pedal released

7.5 to 14 V

A62-13 (CANH) - B93-59 (E1)

Y - BR

CAN communication line

Ignition switch ON

Pulse generation

(See waveform 1)

A62-23 (NSW)*1 - B93-59 (E1)

W - BR

Park/Neutral position switch assembly signal

Ignition switch ON, shift lever not in P or N

11 to 14 V

Ignition switch ON, shift lever in P or N

Below 3.0 V

A62-26 (CANL) - B93-59 (E1)

W - BR

CAN communication line

Ignition switch ON

Pulse generation

(See waveform 2)

A62-27 (W) - B93-59 (E1)

R - BR

Malfunction Indicator Lamp (MIL) operation signal

Ignition switch ON (MIL goes off)

Below 1.5 V

Idling

11 to 14 V

A62-29 (STA) - B93-59 (E1)

V*1 - BR

SB*2 - BR

Starter assembly signal

Cranking

5.5 V or higher

A62-30 (NEO)*4 - B93-59 (E1)

LG - BR

Crankshaft position sensor signal sent to certification ECU (smart key ECU assembly)

Idling with warm engine

Pulse generation

(See waveform 3)

A62-31 (TACH) - B93-59 (E1)

GR - BR

Engine speed signal

Idling

Pulse generation

(See waveform 4)

A62-32 (EC) - Body ground

W-B - Body ground

Ground circuit of ECM

Always

Below 1 Ω

A62-33 (TC) - B93-59 (E1)

G - BR

Terminal TC of DLC3

Ignition switch ON

11 to 14 V

A62-34 (ELS2) - B93-59 (E1)

P - BR

Electric load signal

Defogger switch on

7.5 to 14 V

Defogger switch off

Below 1.5 V

A62-41 (FC) - B93-59 (E1)

W - BR

Fuel pump control

Ignition switch ON

11 to 14 V

Idling

Below 1.5 V

A62-44 (SPD) - B93-59 (E1)

V - BR

Vehicle speed signal from combination meter assembly signal

Driving at 20 km/h (12 mph)

Pulse generation

(See waveform 5)

A62-46 (MREL) - B93-59 (E1)

P - BR

EFI-MAIN NO.1 relay operation signal

Ignition switch ON

11 to 14 V

A62-47 (VPA) - A62-48 (EPA)

W - Y

Accelerator pedal position sensor signal (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

A62-49 (VCPA) - A62-48 (EPA)

B - Y

Power source of accelerator pedal position sensor (for VPA)

Ignition switch ON

4.5 to 5.5 V

A62-50 (VPA2) - A62-51 (EPA2)

R - P

Accelerator pedal position sensor signal (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

A62-52 (VCP2) - A62-51 (EPA2)

L - P

Power source of accelerator pedal position sensor (for VPA2)

Ignition switch ON

4.5 to 5.5 V

B93-26 (E04) - Body ground

W-B - Body ground

Ground circuit of ECM

Always

Below 1 Ω

B93-27 (HA1A) - B93-26 (E04)

L - W-B

Air fuel ratio sensor heater operation signal

Ignition switch ON

11 to 14 V

Idling

Pulse generation

(See WAVEFORM 6)

B93-28 (ME01) - Body ground

W-B - Body ground

Ground circuit of ECM

Always

Below 1 Ω

B93-29 (+BM) - B93-59 (E1)

L - BR

Power source of throttle actuator

Always

11 to 14 V

B93-30 (M-) - B93-28 (ME01)

P - W-B

Throttle actuator operation signal (negative signal)

Idling with warm engine

Pulse generation

(See WAVEFORM 7)

B93-31 (CAN+) - B93-59 (E1)

Y - BR

CAN communication line

Ignition switch ON

Pulse generation

(See waveform 1)

B93-32 (CAN-) - B93-59 (E1)

L - BR

CAN communication line

Ignition switch ON

Pulse generation

(See waveform 2)

B93-33 (PRG) - B93-59 (E1)

G - BR

Purge VSV operation signal

Ignition switch ON

11 to 14 V

Idling, under purge control

Pulse generation

(See WAVEFORM 8)

B93-35 (OC1+) - B93-34 (OC1-)

W - B

Camshaft timing oil control valve assembly (for intake camshaft) operation signal

Idling

Pulse generation

(See WAVEFORM 9)

B93-37 (OE1+) - B93-36 (OE1-)

R - LG

Camshaft timing oil control valve assembly (for exhaust camshaft) operation signal

Idling

Pulse generation

(See WAVEFORM 10)

B93-56 (HT1B) - B93-59 (E1)

R - BR

Heated oxygen sensor heater operation signal

Ignition switch ON

11 to 14 V

Idling

Below 3.0 V

B93-57 (E01) - Body ground

W-B - Body ground

Ground circuit of ECM

Always

Below 1 Ω

B93-58 (E02) - Body ground

W-B - Body ground

Ground circuit of ECM

Always

Below 1 Ω

B93-59 (E1) - Body ground

BR - Body ground

Ground circuit of ECM

Always

Below 1 Ω

B93-60 (M+) - B93-28 (ME01)

V - W-B

Throttle actuator operation signal (positive terminal)

Idling with warm engine

Pulse generation

(See WAVEFORM 11)

B93-62 (ACIS) - B93-59 (E1)

R - BR

Vacuum switching valve (for acoustic control induction system) operation signal

Ignition switch ON

11 to 14 V

B93-71 (IGF1) - B93-59 (E1)

W - BR

Ignition coil assembly

(ignition confirmation signal)

Ignition switch ON

4.5 to 5.5 V

Idling

Pulse generation

(See WAVEFORM 12)

B93-72 (IGT4) - B93-59 (E1)

L - BR

No. 4 ignition coil assembly signal

(ignition signal)

Idling

Pulse generation

(See WAVEFORM 12)

B93-73 (IGT3) - B93-59 (E1)

G - BR

No. 3 ignition coil assembly signal

(ignition signal)

Idling

Pulse generation

(See WAVEFORM 12)

B93-74 (IGT2) - B93-59 (E1)

B - BR

No. 2 ignition coil assembly signal

(ignition signal)

Idling

Pulse generation

(See WAVEFORM 12)

B93-75 (IGT1) - B93-59 (E1)

R - BR

No. 1 ignition coil assembly signal

(ignition signal)

Idling

Pulse generation

(See WAVEFORM 12)

B93-77 (VCPM) - B93-76 (EPIM)

R - W*2*3

R - BE*6

Power source of manifold absolute pressure sensor

Ignition switch ON

4.5 to 5.5 V

B93-78 (PIM) - B93-76 (EPIM)

G - W*2*3

G - BE*6

Manifold absolute pressure sensor signal

Ignition switch ON

3.0 to 5.25 V

B93-80 (EV1+) - B93-112 (EV1-)

B - R

Camshaft position sensor (for exhaust camshaft) signal

Idling with warm engine

Pulse generation

(See WAVEFORM 13)

B93-81 (VCNE) - B93-59 (E1)

P - BR

Power source of crankshaft position sensor (specific voltage)

Ignition switch ON

4.5 to 5.5 V

B93-82 (VV1+) - B93-115 (VV1-)

B - R

Camshaft position sensor (for intake camshaft) signal

Idling with warm engine

Pulse generation

(See WAVEFORM 13)

B93-89 (THEO) - B93-90 (ETHE)

W - V

Engine oil temperature sensor signal

Idling with warm engine

0.3 to 0.85 V

B93-95 (#20) - B93-57 (E01)

G - W-B

No. 2 fuel injector assembly signal

Ignition switch ON

11 to 14 V

Idling

Pulse generation

(See WAVEFORM 14)

B93-96 (#30) - B93-57 (E01)

B - W-B

No. 3 fuel injector assembly signal

Ignition switch ON

11 to 14 V

Idling

Pulse generation

(See WAVEFORM 14)

B93-97 (#40) - B93-57 (E01)

W - W-B

No. 4 fuel injector assembly signal

Ignition switch ON

11 to 14 V

Idling

Pulse generation

(See WAVEFORM 14)

B93-98 (#10) - B93-57 (E01)

L - W-B

No. 1 fuel injector assembly signal

Ignition switch ON

11 to 14 V

Idling

Pulse generation

(See WAVEFORM 14)

B93-99 (OX1B) - B93-131 (EX1B)

W - B

Heated oxygen sensor signal

Engine speed maintained at 2500 rpm for 2 minutes after warming up engine

Pulse generation

(See WAVEFORM 15)

B93-100 (A1A+) - B93-59 (E1)

L - BR

Air fuel ratio sensor signal

Ignition switch ON

3.3 V*5

B93-101 (VTA2) - B93-133 (ETA)

L - L

Throttle position sensor signal (for sensor malfunction detection)

Ignition switch ON, accelerator pedal fully released

2.1 to 3.1 V

Ignition switch ON, accelerator pedal fully depressed

4.6 to 5.0 V

B93-108 (GE01) - Body ground

BR - Body ground

Shielded ground circuit of throttle actuator

Always

Below 1 Ω

B93-111 (VCE1) - B93-59 (E1)

G - BR

Power source of camshaft position sensor (for exhaust camshaft) (specific voltage)

Ignition switch ON

4.5 to 5.5 V

B93-114 (NE+) - B93-113 (NE-)

GR - W

Crankshaft position sensor signal

Idling with warm engine

Pulse generation

(See WAVEFORM 16)

B93-116 (VCV1) - B93-59 (E1)

G - BR

Power source of camshaft position sensor (for intake camshaft) (specific voltage)

Ignition switch ON

4.5 to 5.5 V

B93-120 (THW) - B93-119 (ETHW)

GR - BR

Engine coolant temperature sensor signal

Idling, engine coolant temperature 80°C (176°F)

0.2 to 1.0 V

B93-122 (KNK1) - B93-121 (EKNK)

R - G

Knock sensor signal

Engine speed maintained at 4000 rpm after warming up engine

Pulse generation

(See WAVEFORM 17)

B93-132 (A1A-) - B93-59 (E1)

Y - BR

Air fuel ratio sensor signal

Ignition switch ON

2.9 V*5

B93-134 (VCTA) - B93-133 (ETA)

Y - L

Power source of throttle position sensor (specific voltage)

Ignition switch ON

4.5 to 5.5 V

B93-135 (VTA1) - B93-133 (ETA)

G - L

Throttle position sensor signal (for engine control)

Ignition switch ON, accelerator pedal fully released

0.5 to 1.1 V

Ignition switch ON, accelerator pedal fully depressed

3.2 to 4.8 V

B93-136 (SDWN) - B93-59 (E1)

G - BR

Continuously variable valve lift controller assembly signal

Ignition switch ON

7.2 to 10.3 V

B93-137 (VG) - B93-104 (E2G)

R - G

Mass air flow meter sub-assembly signal

Idling, shift lever in P or N (neutral), A/C switch off

0.5 to 3.0 V

B93-138 (THA) - B93-139 (ETHA)

W - BR

Intake air temperature sensor signal

Idling, intake air temperature 20°C (68°F)

0.5 to 3.4 V

  • *1: for CVT Models

    *2: for Manual Transaxle Models

    *3: w/ Stop and Start System

    *4: w/ Entry and Start System

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

    *6: except *2,*3

  1. WAVEFORM 1

    A283576E01
    Table 1. CAN Communication Signal (Reference)

    ECM Terminal Name

    Between CANH and E1

    Between CAN+ and E1

    Tester Range

    1 V/DIV., 10 μs./DIV.

    Condition

    Ignition switch ON
    Tip:

    The waveform varies depending on the CAN communication signal.

  2. WAVEFORM 2

    A283577E01
    Table 2. CAN Communication Signal (Reference)

    ECM Terminal Name

    Between CANL and E1

    Between CAN- and E1

    Tester Range

    1 V/DIV., 10 μs./DIV.

    Condition

    Ignition switch ON
    Tip:

    The waveform varies depending on the CAN communication signal.

  3. WAVEFORM 3

    Table 3. Crankshaft Position Sensor Signal

    ECM Terminal Name

    Between NEO and E1

    Tester Range

    5 V/DIV., 2 ms./DIV.

    Condition

    Idling with warm engine
    A210050E11

  4. WAVEFORM 4

    A283574E01
    Table 4. Engine Speed Signal

    ECM Terminal Name

    Between TACH and E1

    Tester Range

    5 V/DIV., 10 ms./DIV.

    Condition

    Idling
    Tip:

    The wavelength becomes shorter as the engine speed increases.

  5. WAVEFORM 5

    A283573E12
    Table 5. Vehicle Speed Signal

    ECM Terminal Name

    Between SPD and E1

    Tester Range

    2 V/DIV., 20 ms./DIV.

    Condition

    Driving at 20 km/h (12 mph)
    Tip:

    The wavelength becomes shorter as the vehicle speed increases.

  6. WAVEFORM 6

    A205412E04
    Table 6. Air Fuel Ratio Sensor Heater Operation Signal

    ECM Terminal Name

    Between HA1A and E04

    Tester Range

    5 V/DIV., 10 ms./DIV.

    Condition

    Idling
    Tip:

    The wavelength becomes shorter as the engine speed increases.

  7. WAVEFORM 7

    A245848E22
    Table 7. 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
    Tip:

    The duty ratio varies depending on the throttle actuator operation.

  8. WAVEFORM 8

    A218020E05
    Table 8. Purge VSV Operation Signal

    ECM Terminal Name

    Between PRG and E1

    Tester Range

    10 V/DIV., 20 ms./DIV.

    Condition

    Idling, under purge control
    Tip:

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

  9. WAVEFORM 9

    A283575E01
    Table 9. Camshaft Timing Oil Control Valve Assembly (for Intake Camshaft) Signal

    ECM Terminal Name

    Between OC1+ and OC1-

    Tester Range

    5 V/DIV., 1 ms./DIV.

    Condition

    Idling

  10. WAVEFORM 10

    A283575E02
    Table 10. Camshaft Timing Oil Control Valve Assembly (for Exhaust Camshaft) Signal

    ECM Terminal Name

    Between OE1+ and OE1-

    Tester Range

    5 V/DIV., 1 ms./DIV.

    Condition

    Idling

  11. WAVEFORM 11

    A208000E20
    Table 11. 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
    Tip:

    The duty ratio varies depending on the throttle actuator operation.

  12. WAVEFORM 12

    Table 12. Ignition Coil Assembly Signal (IGT and IGF 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
    Tip:

    The wavelength becomes shorter as the engine speed increases.

    A299080E15

  13. WAVEFORM 13

    A255508E20
    Table 13. 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
    Tip:

    The wavelength becomes shorter as the engine speed increases.

  14. WAVEFORM 14

    A287799E02
    Table 14. 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
    Tip:

    The wavelength becomes shorter as the engine speed increases.

  15. WAVEFORM 15

    A283571E01
    Table 15. 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
    Tip:

    In the Data List, the items O2S B1 S2 show the values input to the ECM from the heated oxygen sensor.

  16. WAVEFORM 16

    A200774E03
    Table 16. Crankshaft Position Sensor Signal

    ECM Terminal Name

    Between NE+ and NE-

    Tester Range

    2 V/DIV., 20 ms./DIV.

    Condition

    Idling with warm engine
    Tip:

    The wavelength becomes shorter as the engine speed increases.

  17. WAVEFORM 17

    A283572E01
    Table 17. Knock 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
    Tip:

    • The wavelength becomes shorter as the engine speed increases.

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