SFI SYSTEM(w/o EGR System) TERMINALS OF ECM

A262466E33
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

A62-1 (BATT) - B75-16 (E1)

W - BR

Auxiliary battery (for measuring auxiliary battery voltage and for ECM memory)

Power switch off

11 to 16 V

A62-2 (+B) - B75-16 (E1)

R - BR

Power source of ECM

Power switch on (IG)

11 to 14 V

A62-3 (+B2) - B75-16 (E1)

P - BR

Power source of ECM

Power switch on (IG)

11 to 14 V

B75-29 (+BM) - B75-16 (E1)

L - BR

Power source of throttle actuator

Power switch off

11 to 16 V

A62-46 (MREL) - B75-16 (E1)

P - BR

EFI-MAIN relay operation signal

Power switch on (IG)

11 to 14 V

B75-113 (VCV1) - B75-16 (E1)

W - BR

Power source for camshaft position sensor (specific voltage)

Power switch on (IG)

4.5 to 5.5 V

A62-37 (IGSW) - B75-16 (E1)

P - BR

Power switch signal

Power switch on (IG)

11 to 14 V

B75-125 (VCTA) - B75-126 (ETA)

Y - L

Power source for throttle position sensor (specific voltage)

Power switch on (IG)

4.5 to 5.5 V

B75-127 (VTA1) - B75-126 (ETA)

G - L

Throttle position sensor signal (for engine control)

Power switch on (IG), accelerator pedal fully released

0.5 to 1.1 V

B75-128 (VTA2) - B75-126 (ETA)

L - L

Throttle position sensor signal (for sensor malfunction detection)

Power switch on (IG), accelerator pedal fully released

2.1 to 3.1 V

B75-20 (#10) - B75-50 (E01)

L - W-B

No. 1 fuel injector assembly signal

Power switch on (IG)

11 to 14 V

Idling with warm engine

Pulse generation

(see waveform 1)

B75-17 (#20) - B75-50 (E01)

G - W-B

No. 2 fuel injector assembly signal

Power switch on (IG)

11 to 14 V

Idling with warm engine

Pulse generation

(see waveform 1)

B75-18 (#30) - B75-50 (E01)

B - W-B

No. 3 fuel injector assembly signal

Power switch on (IG)

11 to 14 V

Idling with warm engine

Pulse generation

(see waveform 1)

B75-19 (#40) - B75-50 (E01)

W - W-B

No. 4 fuel injector assembly signal

Power switch on (IG)

11 to 14 V

Idling with warm engine

Pulse generation

(see waveform 1)

B75-74 (OC1+) - B75-75 (OC1-)

W - B

Camshaft timing oil control valve assembly operation signal

Idling

Pulse generation

(see waveform 2)

B75-82 (VV1+) - B75-114 (VV1-)

B - R

Camshaft position sensor signal

Idling with warm engine

Pulse generation

(see waveform 15)

B75-76 (NE+) - B75-109 (NE-)

W - B

Crankshaft position sensor signal

Idling with warm engine

Pulse generation

(see waveform 3)

B75-60 (M+) - B75-58 (ME01)

V - W-B

Throttle actuator operation signal (positive terminal)

Idling with warm engine

Pulse generation

(see waveform 5)

B75-30 (M-) - B75-58 (ME01)

P - W-B

Throttle actuator operation signal (negative terminal)

Idling with warm engine

Pulse generation

(see waveform 6)

B75-57 (IGT1) - B75-16 (E1)

R - BR

No. 1 ignition coil assembly (ignition signal)

Idling with warm engine

Pulse generation

(see waveform 7)

B75-56 (IGT2) - B75-16 (E1)

B - BR

No. 2 ignition coil assembly (ignition signal)

Idling with warm engine

Pulse generation

(see waveform 7)

B75-55 (IGT3) - B75-16 (E1)

G - BR

No. 3 ignition coil assembly (ignition signal)

Idling with warm engine

Pulse generation

(see waveform 7)

B75-54 (IGT4) - B75-16 (E1)

L - BR

No. 4 ignition coil assembly (ignition signal)

Idling with warm engine

Pulse generation

(see waveform 7)

B75-51 (IGF1) - B75-16 (E1)

W - BR

Ignition coil assembly (ignition confirmation signal)

Power switch on (IG)

4.5 to 5.5 V

Idling with warm engine

Pulse generation

(see waveform 7)

B75-95 (THW) - B75-96 (ETHW)

GR - BR

Engine coolant temperature sensor signal

Idling, engine coolant temperature 60 to 120°C (140 to 248°F)

0.2 to 1.0 V

B75-93 (THA) - B75-94 (ETHA)

W - BE

Intake air temperature sensor signal

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

0.5 to 3.4 V

B75-91 (VG) - B75-92 (E2G)

Y - L

Mass air flow meter sub-assembly signal

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

0.5 to 3.0 V

B75-68 (PRG) - B75-16 (E1)

G - BR

Purge VSV for EVAP system operation signal

Power switch on (IG)

11 to 14 V

Idling with warm engine, under purge control

Pulse generation

(see waveform 8)

B75-133 (A1A+) - B75-16 (E1)

L - BR

Air fuel ratio sensor (sensor 1) signal

Power switch on (IG)

3.3 V*

B75-134 (A1A-) - B75-16 (E1)

Y - BR

Air fuel ratio sensor (sensor 1) signal

Power switch on (IG)

2.9 V*

B75-23 (HA1A) - B75-53 (E04)

W - W-B

Air fuel ratio sensor (sensor 1) heater operation signal

Idling

Pulse generation

(see waveform 9)

Power switch on (IG)

11 to 14 V

B75-100 (OX1B) - B75-132 (EX1B)

L - Y

Heated oxygen sensor (sensor 2) signal

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

Pulse generation

(see waveform 10)

B75-24 (HT1B) - B75-53 (E04)

R - W-B

Heated oxygen sensor (sensor 2) heater operation signal

Idling

Below 3.0 V

Power switch on (IG)

11 to 14 V

B75-123 (KNK1) - B75-124 (EKNK)

R - G

Knock control sensor signal

Engine speed maintained at 2500 rpm after warming up engine

Pulse generation

(see waveform 11)

A62-13 (CANH) - B75-16 (E1)

Y - BR

CAN communication line

Power switch on (IG)

Pulse generation

(see waveform 12)

A62-26 (CANL) - B75-16 (E1)

W - BR

CAN communication line

Power switch on (IG)

Pulse generation

(see waveform 13)

A62-12 (CANP) - B75-16 (E1)

R - BR

CAN communication line

Power switch on (IG)

Pulse generation

(see waveform 12)

A62-25 (CANN) - B75-16 (E1)

W - BR

CAN communication line

Power switch on (IG)

Pulse generation

(see waveform 13)

A62-44 (RFC) - B75-16 (E1)

R - BR

Cooling fan control signal

Power switch on (IG), A/C switch on (max cool)

Pulse generation

(see waveform 14)

A62-60 (G2O) - B75-16 (E1)

B - BR

Inverter with converter assembly (camshaft revolution signal)

Idling with warm engine

Pulse generation

(see waveform 4)

B75-59 (GE01) - B75-16 (E1)

BR - BR

Shielded ground circuit of throttle actuator

Always

Below 1 Ω

A62-21 (FPC) - B75-16 (E1)

R - BR

Fuel pump control

Engine stopped, power switch on (IG)

Below 1.5 V

B75-78 (VCPM) - B75-80 (EPIM)

BE - G

Power source of absolute pressure sensor

Power switch on (IG)

4.75 to 5.25 V

B75-79 (PIM) - B75-80 (EPIM)

R - G

Manifold absolute pressure sensor signal

Power switch on (IG)

3.0 to 5.0 V

A62-31 (TACH) - B75-16 (E1)

GR - BR

Engine speed

Idling with warm engine

Pulse generation

(see waveform 16)

A62-9 (PWMS) - B75-16 (E1)

GR - BR

Driving mode select switch (SPORT mode)

Power switch on (IG), driving mode select switch being turned and held at SPORT position (SPORT mode)

0 to 1.5 V

Power switch on (IG)

11 to 14 V

A62-14 (EC) - Body ground

W-B - -

Ground

Always

Below 1 Ω

B75-16 (E1) - Body ground

BR - -

Ground

Always

Below 1 Ω

B75-50 (E01) - Body ground

W-B - -

Ground

Always

Below 1 Ω

B75-49 (E02) - Body ground

W-B - -

Ground

Always

Below 1 Ω

B75-53 (E04) - Body ground

W-B - -

Ground

Always

Below 1 Ω

B75-58 (ME01) - Body ground

W-B - -

Ground

Always

Below 1 Ω

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

  1. WAVEFORM 1

    A292383E01
    Table 1. 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
    Tip:

    The wavelength becomes shorter as the engine speed increases.

  2. WAVEFORM 2

    A292381E01
    Table 2. Camshaft Timing Oil Control Valve Assembly Operation Signal

    ECM Terminal Name

    Between OC1+ and OC1-

    Tester Range

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

    Condition

    Idling

  3. WAVEFORM 3

    A254144E03
    Table 3. Crankshaft Position Sensor Signal

    ECM Terminal Name

    Between NE+ and NE-

    Tester Range

    5 V/DIV., 20 ms./DIV.

    Condition

    Idling with warm engine
    Tip:

    The wavelength becomes shorter as the engine speed increases.

  4. WAVEFORM 4

    A214025E01
    Table 4. Camshaft Revolution Signal (Inverter with Converter Assembly)

    ECM Terminal Name

    Between G2O and E1

    Tester Range

    5 V/DIV., 20 ms./DIV.

    Condition

    Idling with warm engine
    Tip:

    The wavelength becomes shorter as the engine speed increases.

  5. WAVEFORM 5

    A208000E03
    Table 5. 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.

  6. WAVEFORM 6

    A245848E01
    Table 6. 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.

  7. WAVEFORM 7

    A299080E06
    Table 7. Ignition Coil Assembly Signal (IGT and IGF1 Signal)

    ECM Terminal Name

    Between IGT (1 to 4) and E1

    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.

  8. WAVEFORM 8

    A218020E01
    Table 8. 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.

  9. WAVEFORM 9

    A205412E01
    Table 9. Air Fuel Ratio Sensor (Sensor 1) Heater Operation Signal

    ECM Terminal Name

    Between HA1A and E04

    Tester Range

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

    Condition

    Idling

  10. WAVEFORM 10

    A292382E01
    Table 10. Heated Oxygen Sensor (Sensor 2) 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, item O2S B1S2 shows the ECM values from the heated oxygen sensor.

  11. WAVEFORM 11

    A283572E06
    Table 11. Knock Control Sensor Signal

    ECM Terminal Name

    Between KNK1 and EKNK

    Tester Range

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

    Condition

    Engine speed maintained at 2500 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 condition.

  12. WAVEFORM 12

    A292386E01
    Table 12. CAN Communication Signal (Reference)

    ECM Terminal Name

    Between CANH and E1, or CANP and E1

    Tester Range

    1 V/DIV., 10 μs./DIV.

    Condition

    Power switch on (IG)
    Tip:

    The waveform varies depending on the CAN communication signal.

  13. WAVEFORM 13

    A292387E01
    Table 13. CAN Communication Signal (Reference)

    ECM Terminal Name

    Between CANL and E1, or CANN and E1

    Tester Range

    1 V/DIV., 10 μs./DIV.

    Condition

    Power switch on (IG)
    Tip:

    The waveform varies depending on the CAN communication signal.

  14. WAVEFORM 14

    Table 14. Cooling Fan Control Signal

    ECM Terminal Name

    Between RFC and E1

    Tester Range

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

    Condition

    Power switch on (IG), A/C switch on (max cool)
    Tip:

    The duty ratio varies depending on the engine coolant temperature.

    A282867E06

  15. WAVEFORM 15

    A254143E02
    Table 15. Camshaft Position Sensor Signal

    ECM Terminal Name

    Between VV1+ and VV1-

    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

    A292385E01
    Table 16. 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.