SFI SYSTEM TERMINALS OF ECM

A335752E07
Tip:

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

A173-1 (BATT) - B208-53 (E1)

B - W-B

Battery (for measuring battery voltage and for ECM memory)

Always

11 to 14 V

A173-2 (+B) - B208-53 (E1)

B - W-B

Power source of ECM

Ignition switch ON

11 to 14 V

A173-3 (+B2) - B208-53 (E1)

B - W-B

Power source of ECM

Ignition switch ON

11 to 14 V

A173-6 (IGSW) - B208-53 (E1)

L - W-B

Ignition switch signal

Ignition switch ON

11 to 14 V

A173-8 (IREL) - B208-53 (E1)

B - W-B

INJ relay operation signal

Engine stopped, ignition switch ON

0 to 1.5 V

A173-9 (STP) - B208-53 (E1)

L - W-B

Stop light switch assembly signal

Brake pedal depressed

7.5 to 14 V

Brake pedal released

0 to 1.5 V

A173-10 (ST1-) - B208-53 (E1)

R - W-B

Stop light switch assembly signal

(opposite to STP terminal)

Ignition switch ON, brake pedal depressed

0 to 1.5 V

Ignition switch ON, brake pedal released

7.5 to 14 V

A173-11 (WP1) - B208-53 (E1)

V - W-B

Electric water pump assembly signal

Electric water pump assembly operating

Pulse generation

A173-13 (CANH) - B208-53 (E1)

B - W-B

CAN communication signal

Engine stopped, ignition switch ON

Pulse generation

(See waveform 1)

A173-14 (EC) - Body ground

BR - -

Ground

Always

Below 1 Ω

A173-21 (FPC) - B208-53 (E1)

V - W-B

Fuel pump control

Engine stopped, ignition switch ON

Below 1.5 V

A173-24 (WPO) - B208-53 (E1)

SB - W-B

Electric water pump assembly signal

Electric water pump assembly operating

Pulse generation

A173-26 (CANL) - B208-53 (E1)

W - W-B

CAN communication signal

Engine stopped, ignition switch ON

Pulse generation

(See waveform 2)

A173-27 (W) - B208-53 (E1)

LG - W-B

Malfunction Indicator Lamp (MIL) operation signal

Engine stopped, ignition switch ON

(MIL illuminated)

0 to 1.5 V

Idling

11 to 14 V

A173-29 (STA) - B208-53 (E1)

LG - W-B

Starter operation signal

Cranking

6.0 V or higher

A173-30 (NEO) - B208-53 (E1)

L - W-B

Engine speed signal sent to other ECUs

Idling with warm engine

Pulse generation

(See waveform 3)

A173-31 (TACH) - B208-53 (E1)

GR - W-B

Engine speed signal

Idling with warm engine

Pulse generation

(See waveform 4)

A173-33 (TC) - B208-53 (E1)

P - W-B

Terminal TC of DLC3

Engine stopped, ignition switch ON

11 to 14 V

A173-44 (SPD) - B208-53 (E1)

V - W-B

Vehicle speed signal from combination meter assembly

Driving at 20 km/h (12 mph)

Pulse generation

(See waveform 5)

A173-46 (MREL) - B208-53 (E1)

L - W-B

EFI-MAIN relay operation signal

Engine stopped, ignition switch ON

11 to 14 V

A173-47 (VPA) - A173-48 (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

A173-49 (VCPA) - A173-48 (EPA)

B - Y

Power source of accelerator pedal position sensor (for VPA)

Engine stopped, ignition switch ON

4.5 to 5.5 V

A173-50 (VPA2) - A173-51 (EPA2)

R - P

Accelerator pedal position sensor signal

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

A173-52 (VCP2) - A173-51 (EPA2)

L - P

Power source of accelerator pedal position sensor (for VPA2)

Engine stopped, ignition switch ON

4.5 to 5.5 V

A173-57 (NSW) - B208-53 (E1)

W - W-B

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

A173-58 (KSW)*3 - B208-53 (E1)

V - W-B

Key in vehicle signal

Ignition switch off → ON

0 to 3.0 V

A173-58 (KSW)*2 - B208-53 (E1)

V - W-B

Unlock warning switch signal

Key in ignition key cylinder

0 to 3.0 V

A173-59 (S)*1 - B208-53 (E1)

L - W-B

M shift position switch signal

Ignition switch ON, shift lever in M

11 to 14 V

Ignition switch ON, shift lever not in M

Below 1 V

A173-60 (RFC) - B208-53 (E1)

R - W-B

Cooling fan control signal

Ignition switch ON, A/C switch on (max cool)

Pulse generation

(See waveform 6)

B208-9 (OC1+) - B208-8 (OC1-)

B - Y

Cam timing oil control solenoid assembly (for intake camshaft) operation signal

Idling

Pulse generation

(See waveform 7)

B208-16 (M+) - B208-49 (ME01)

V - W-B

Throttle actuator operation signal (positive terminal)

Idling with warm engine

Pulse generation

(See waveform 8)

B208-17 (HT1B) - B208-53 (E1)

L - W-B

Heated oxygen sensor heater operation signal

Engine stopped, ignition switch ON

11 to 14 V

Idling with cold engine

Below 3.0 V

B208-18 (E04) - Body ground

W-B - -

Ground

Always

Below 1 Ω

B208-19 (HA1A) - B208-18 (E04)

R - W-B

Air fuel ratio sensor heater operation signal

Engine stopped, ignition switch ON

11 to 14 V

Idling with cold engine

Pulse generation

(See waveform 9)

B208-21 (#2D+) - B208-20 (#2D-)

B - W

No. 2 fuel injector assembly signal

Idling with warm engine

Pulse generation

B208-22 (#3D+) - B208-23 (#3D-)

R - G

No. 3 fuel injector assembly signal

Idling with warm engine

Pulse generation

B208-25 (#4D+) - B208-24 (#4D-)

L - Y

No. 4 fuel injector assembly signal

Idling with warm engine

Pulse generation

B208-26 (#1D+) - B208-27 (#1D-)

P - V

No. 1 fuel injector assembly signal

Idling with warm engine

Pulse generation

B208-28 (FP1+) - B208-29 (FP1-)

P - V

Fuel pump (for high pressure side) signal

Engine running

Pulse generation

B208-30 (+BD1) - B208-53 (E1)

R - W-B

Power source of ECU (injector driver)

Engine stopped, ignition switch ON

11 to 14 V

B208-34 (D)*1 - B208-53 (E1)

GR - W-B

D shift position switch signal

Ignition switch ON, shift lever in D or M

11 to 14 V

Ignition switch ON, shift lever not in D or M

Below 1 V

B208-34 (D)*5 - B208-53 (E1)

GR - W-B

Clutch pedal switch (upper switch) signal

Ignition switch ON, clutch pedal fully depressed

Below 1 V

Ignition switch ON, clutch pedal fully released

11 to 14 V

B208-35 (R) - B208-53 (E1)

L - W-B

R shift position switch signal

Ignition switch ON, shift lever in R

11 to 14 V

Ignition switch ON, shift lever not in R

Below 1 V

B208-37 (WGV+) - B208-36 (WGV-)

B - R

Vacuum regulating valve assembly operation signal

Vacuum regulating valve assembly operating

Pulse generation

B208-38 (OE1+) - B208-68 (OE1-)

G - P

Cam timing oil control solenoid assembly (for exhaust camshaft) operation signal

Idling

Pulse generation

(See waveform 10)

B208-39 (IGT4) - B208-53 (E1)

W - W-B

No. 4 ignition coil assembly signal

(ignition signal)

Idling with warm engine

Pulse generation

(See waveform 11)

B208-40 (IGT3) - B208-53 (E1)

G - W-B

No. 3 ignition coil assembly signal

(ignition signal)

Idling with warm engine

Pulse generation

(See waveform 11)

B208-41 (IGT2) - B208-53 (E1)

B - W-B

No. 2 ignition coil assembly signal

(ignition signal)

Idling with warm engine

Pulse generation

(See waveform 11)

B208-42 (IGT1) - B208-53 (E1)

R - W-B

No. 1 ignition coil assembly signal

(ignition signal)

Idling with warm engine

Pulse generation

(See waveform 11)

B208-46 (M-) - B208-49 (ME01)

P - W-B

Throttle actuator operation signal (negative terminal)

Idling with warm engine

Pulse generation

(See waveform 12)

B208-47 (GE01) - Body ground

BR - -

Shielded earth (ground) circuit of throttle actuator

Always

Below 1 Ω

B208-48 (+BM) - B208-53 (E1)

B - W-B

Power source of throttle actuator

Always

11 to 14 V

B208-49 (ME01) - Body ground

W-B - -

Ground

Always

Below 1 Ω

B208-50 (E02) - Body ground

W-B - -

Ground

Always

Below 1 Ω

B208-51 (E01) - Body ground

W-B - -

Ground

Always

Below 1 Ω

B208-53 (E1) - Body ground

W-B - -

Ground

Always

Below 1 Ω

B208-58 (E1D2) - Body ground

W - -

Ground

Always

Below 1 Ω

B208-59 (E1D1) - Body ground

B - -

Ground

Always

Below 1 Ω

B208-60 (+BD2) - B208-53 (E1)

G - W-B

Power source of ECU (injector driver)

Engine stopped, ignition switch ON

11 to 14 V

B208-64 (P)*1 - B208-53 (E1)

V - W-B

P shift position switch signal

Ignition switch ON, shift lever in P

11 to 14 V

Ignition switch ON, shift lever not in P

Below 1 V

B208-65 (N)*1 - B208-53 (E1)

B - W-B

N shift position switch signal

Ignition switch ON, shift lever in N

11 to 14 V

Ignition switch ON, shift lever not in N

Below 1 V

B208-67 (ABV) - B208-53 (E1)

Y - W-B

Air by-pass valve operation signal

Engine stopped, ignition switch ON

11 to 14 V

Air by-pass valve operating

1.5 V or less

B208-69 (EOJV) - B208-53 (E1)

V - W-B

Oil pressure switching valve assembly operation signal

Oil pressure switching valve assembly operating

1.5 V or less

Oil pressure switching valve assembly not operating

11 to 14 V

B208-70 (PRG) - B208-53 (E1)

L - W-B

Purge VSV operation signal

Engine stopped, ignition switch ON

11 to 14 V

Idling with warm engine, under purge control

Pulse generation

(See waveform 13)

B208-76 (NE+) - B208-109 (NE-)

R - Y

Crankshaft position sensor signal

Idling with warm engine

Pulse generation

(See waveform 14)

B208-81 (EV1+) - B208-112 (EV1-)

R - B

Camshaft position sensor (for exhaust camshaft) signal

Idling with warm engine

Pulse generation

(See waveform 15)

B208-82 (VV1+) - B208-114 (VV1-)

B - P

Camshaft position sensor (for intake camshaft) signal

Idling with warm engine

Pulse generation

(See waveform 15)

B208-88 (VTA2) - B208-120 (ETA)

R - L

Throttle position sensor signal (for sensor malfunction detection)

Ignition switch ON, accelerator pedal fully released

2.1 to 3.1 V

Engine running, accelerator pedal fully depressed

4.6 to 5.0 V

B208-92 (VG) - B208-91 (E2G)

V - R

Mass air flow meter sub-assembly signal

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

0.5 to 3.0 V

B208-94 (THA) - B208-93 (ETHA)

L - W

Intake air temperature sensor (mass air flow meter sub-assembly) signal

Idling, intake air temperature 0 to 80°C (32 to 176°F)

0.5 to 3.4 V

B208-97 (THEO) - B208-96 (ETHE)

Y - V

Engine oil temperature sensor signal

Idling with warm engine

0 to 5.0 V

B208-98 (PEO) - B208-129 (EPEO)

W - R

Oil pressure sender gauge assembly signal

Idling with warm engine

0.5 to 4.5 V

B208-99 (OX1B) - B208-100 (EX1B)

L - Y

Heated oxygen sensor signal

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

Pulse generation

(See waveform 16)

B208-101 (IGF1) - B208-53 (E1)

B - W-B

Ignition coil assembly (ignition confirmation signal)

Idling with warm engine

Pulse generation

(See waveform 11)

B208-103 (PR) - B208-135 (EPR)

W - R

Fuel pressure sensor signal

Idling with warm engine

0.5 to 4.5 V

B208-104 (THW) - B208-105 (ETHW)

B - BR

Engine coolant temperature sensor signal

Idling, engine coolant temperature 75 to 100°C (167 to 212°F)

0.2 to 1.0 V

B208-106 (PIM) - B208-137 (EPIM)

V - R

No. 2 turbo pressure sensor signal

Idling with warm engine

1.0 to 4.5 V

B208-107 (THIM) - B208-53 (E1)

B - W-B

Intake air temperature sensor (No. 2 turbo pressure sensor) signal

Idling with warm engine

0 to 5.0 V

B208-108 (PTA) - B208-139 (EPTA)

L - LG

No. 1 turbo pressure sensor signal

Idling with warm engine

1.0 to 4.5 V

B208-110 (VCNE) - B208-53 (E1)

L - W-B

Power source of crankshaft position sensor (specific voltage)

Engine stopped, ignition switch ON

4.5 to 5.5 V

B208-111 (VCE1) - B208-53 (E1)

W - W-B

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

Engine stopped, ignition switch ON

4.5 to 5.5 V

B208-113 (VCV1) - B208-53 (E1)

W - W-B

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

Engine stopped, ignition switch ON

4.5 to 5.5 V

B208-121 (VCTA) - B208-120 (ETA)

L - L

Power source of throttle position sensor (specific voltage)

Engine stopped, ignition switch ON

4.5 to 5.5 V

B208-122 (VTA1) - B208-120 (ETA)

LG - L

Throttle position sensor signal (for engine control)

Ignition switch ON, accelerator pedal fully released

0.6 to 1.1 V

Engine running, accelerator pedal fully depressed

3.2 to 4.8 V

B208-124 (KNK1) - B208-123 (EKNK)

B - W

Knock control sensor signal

Engine speed maintained at 4000 rpm after warming up engine

Pulse generation

(See waveform 17)

B208-130 (VCPE) - B208-53 (E1)

P - W-B

Power source of oil pressure sender gauge assembly (specific voltage)

Engine stopped, ignition switch ON

4.75 to 5.25 V

B208-131 (A1A+) - B208-53 (E1)

Y - W-B

Air fuel ratio sensor signal

Engine stopped, ignition switch ON

3.0 to 3.6 V*4

B208-132 (A1A-) - B208-53 (E1)

L - W-B

Air fuel ratio sensor signal

Engine stopped, ignition switch ON

2.7 to 3.3 V*4

B208-136 (VCPR) - B208-53 (E1)

G - W-B

Power source of fuel pressure sensor (specific voltage)

Engine stopped, ignition switch ON

4.5 to 5.5 V

B208-138 (VCPM) - B208-53 (E1)

G - W-B

Power source of No. 2 turbo pressure sensor (specific voltage)

Engine stopped, ignition switch ON

4.75 to 5.25 V

B208-140 (VPTA) - B208-53 (E1)

GR - W-B

Power source of No. 1 turbo pressure sensor (specific voltage)

Engine stopped, ignition switch ON

4.75 to 5.25 V

  • *1: for CVT models

  • *2: w/o Entry and Start System

  • *3: w/ Entry and Start System

  • *4: The ECM terminal voltage is contact regardless of the voltage output from the sensor.

  • *5: for M/T models

  1. WAVEFORM 1

    A283576E01
    Table 1. CAN Communication Signal (Reference)

    ECM Terminal Name

    Between CANH and E1

    Tester Range

    1 V/DIV., 10 μs./DIV.

    Condition

    Engine stopped, 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

    Tester Range

    1 V/DIV., 10 μs./DIV.

    Condition

    Engine stopped, ignition switch ON
    Tip:

    The waveform varies depending on the CAN communication signal.

  3. WAVEFORM 3

    A304647E05
    Table 3. Engine Speed Signal

    ECM Terminal Name

    Between NEO and E1

    Tester Range

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

    Condition

    Idling with warm engine
    Tip:

    The wavelength becomes shorter as the engine speed increases.

  4. WAVEFORM 4

    A287797E04
    Table 4. Engine Speed Signal

    ECM Terminal Name

    Between TACH and E1

    Tester Range

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

    Condition

    Idling with warm engine
    Tip:

    The wavelength becomes shorter as the engine speed increases.

  5. WAVEFORM 5

    A283573E11
    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

    A282867E05
    Table 6. Cooling Fan Control Signal

    ECM Terminal Name

    Between RFC and E1

    Tester Range

    1 V/DIV., 20 ms./DIV.

    Condition

    Ignition switch ON, A/C switch on (max cool)
    Tip:

    The duty ratio varies depending on the engine coolant temperature.

  7. WAVEFORM 7

    A283575E01
    Table 7. Cam Timing Oil Control Solenoid Assembly (for Intake Camshaft) Operation Signal

    ECM Terminal Name

    Between OC1+ and OC1-

    Tester Range

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

    Condition

    Idling

  8. WAVEFORM 8

    A208000E20
    Table 8. 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.

  9. WAVEFORM 9

    A205412E04
    Table 9. 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

    A283575E02
    Table 10. Cam Timing Oil Control Solenoid Assembly (for Exhaust Camshaft) Operation Signal

    ECM Terminal Name

    Between OE1+ and OE1-

    Tester Range

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

    Condition

    Idling

  11. WAVEFORM 11

    A299080E12
    Table 11. 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 with warm engine
    Tip:

    The wavelength becomes shorter as the engine speed increases.

  12. WAVEFORM 12

    A245848E22
    Table 12. 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.

  13. WAVEFORM 13

    A218020E05
    Table 13. Purge VSV Operation Signal

    ECM Terminal Name

    Between PRG and E1

    Tester Range

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

    Condition

    Idling with warm engine, under purge control
    Tip:

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

  14. WAVEFORM 14

    A200774E03
    Table 14. 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.

  15. WAVEFORM 15

    A255508E20
    Table 15. 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.

  16. WAVEFORM 16

    A283571E01
    Table 16. 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:

    Data List item "O2 Sensor Voltage B1S2" shows the ECM values from the heated oxygen sensor.

  17. WAVEFORM 17

    A283572E01
    Table 17. 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
    Tip:

    • The wavelength becomes shorter as the engine speed increases.

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