Toyota Yaris: Sfi System / Terminals Of Ecm

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / G16e-gts (engine Control) / Sfi System / Terminals Of Ecm

TERMINALS OF ECM

HINT:

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 are 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)

Terminal Description

Condition

Specified Condition

A106-1(BATT) - A106-10(E1)

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

Always

11 to 14 V

A106-2(IGP) - A106-10(E1)

Ignition switch signal

Ignition switch ON

11 to 14 V

A106-6(FPC) - A106-10(E1)

Fuel pump control

Engine stopped, ignition switch ON

0 to 1.5 V

A106-8(CANH) - A106-10(E1)

CAN communication line

Engine stopped, ignition switch ON

Pulse generation

(See waveform 1)

A106-9(+B) - A106-10(E1)

Power source of ECM

Ignition switch ON

11 to 14 V

A106-10(E1) - Body ground

Ground

Always

Below 1 Ω

A106-13(IGR) - A106-10(E1)

Ignition signal

Ignition switch ON

11 to 14 V

A106-15(MREL) - A106-10(E1)

EFI-MAIN NO. 1 relay operation signal

Engine stopped, ignition switch ON

0 to 1.5 V

A106-16(NEO) - A106-10(E1)

Engine speed signal sent to other ECUs

Idling with warm engine

Pulse generation

(See waveform 2)

A106-18(CANL) - A106-10(E1)

CAN communication line

Engine stopped, ignition switch ON

Pulse generation

(See waveform 3)

A106-21(STP) - A106-10(E1)

Stop light switch assembly signal

Brake pedal depressed

7.5 to 14 V

Brake pedal released

0 to 1.5 V

A106-22(ST1-) - A106-10(E1)

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

A106-23(NSW) - A106-10(E1)

Clutch start switch signal

Ignition switch ON, clutch pedal fully released

11 to 14 V

Ignition switch ON, clutch pedal depressed

Below 3.0 V

A106-30(STA) - A106-10(E1)

Starter assembly signal

Cranking

6 V or higher

A106-32(RFC) - A106-10(E1)

Cooling fan control signal

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

Pulse generation

(See waveform 4)

A106-34(IREL) - A106-10(E1)

EDU relay operation signal

Ignition switch ON

0 to 1.5 V

A106-35(+B2) - A106-10(E1)

Power source of ECM

Ignition switch ON

11 to 14 V

A106-36(E01) - Body ground

Ground

Always

Below 1 Ω

A106-39(KSW) - A106-10(E1)

Key in vehicle signal

Ignition switch ON

0 to 3 V

A106-42(SPD) - A106-10(E1)

Vehicle speed signal from combination meter assembly

Driving at 20 km/h (12 mph)

Pulse generation

(See waveform 5)

A106-45(EC) - Body ground

Ground

Always

Below 1 Ω

D104-19(+BD1) - A106-10(E1)

Power source of ECU (injector driver)

Ignition switch ON

11 to 14 V

A106-54(E1D1) - Body ground

Ground

Always

Below 1 Ω

A106-55(VPA) - A106-56(EPA)

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

A106-57(VCPA) - A106-56(EPA)

Power source of accelerator pedal position sensor (for VPA)

Engine stopped, ignition switch ON

4.5 to 5.5 V

A106-58(VPA2) - A106-59(EPA2)

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

A106-60(VCP2) - A106-59(EPA2)

Power source of accelerator pedal position sensor (for VPA2)

Engine stopped, ignition switch ON

4.5 to 5.5 V

D104-4(M-) - A106-10(E1)

Throttle actuator operation signal (negative signal)

Idling with warm engine

Pulse generation

(See waveform 6)

D104-3(M+) - A106-10(E1)

Throttle actuator operation signal (positive terminal)

Idling with warm engine

Pulse generation

(See waveform 7)

D104-1(HA1B) - A106-10(E1)

Air fuel ratio sensor (sensor 2) heater operation signal

Engine stopped, ignition switch ON

11 to 14 V

Idling with cold engine

Pulse generation

(See waveform 8)

D104-2(HA1A) - A106-10(E1)

Air fuel ratio sensor (sensor 1) heater operation signal

Engine stopped, ignition switch ON

11 to 14 V

Idling with cold engine

Pulse generation

(See waveform 8)

D104-14(#2D-) - A106-10(E1)

Fuel injector assembly signal (No. 2 cylinder)

Idling with warm engine

Pulse generation

(See waveform 9)

D104-33(#2D+) - A106-10(E1)

Fuel injector assembly signal (No. 2 cylinder)

Idling with warm engine

Pulse generation

(See waveform 9)

D104-35(#3D+) - A106-10(E1)

Fuel injector assembly signal (No. 3 cylinder)

Idling with warm engine

Pulse generation

(See waveform 9)

D104-16(#3D-) - A106-10(E1)

Fuel injector assembly signal (No. 3 cylinder)

Idling with warm engine

Pulse generation

(See waveform 9)

D104-31(#1D+) - A106-10(E1)

Fuel injector assembly signal (No. 1 cylinder)

Idling with warm engine

Pulse generation

(See waveform 9)

D104-12(#1D-) - A106-10(E1)

Fuel injector assembly signal (No. 1 cylinder)

Idling with warm engine

Pulse generation

(See waveform 9)

D104-10(FP1-) - A106-10(E1)

Fuel pump assembly (for high pressure side) signal

Idling with warm engine

Pulse generation

(See waveform 10)

D104-29(FP1+) - A106-10(E1)

Fuel pump assembly (for high pressure side) signal

Idling with warm engine

Pulse generation

(See waveform 10)

D104-25(OE1+) - D104-26(OE1-)

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

Idling

Pulse generation

(See waveform 11)

D104-27(OC1+) - D104-28(OC1-)

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

Idling

Pulse generation

(See waveform 11)

D104-45(PRG) - A106-10(E1)

Purge VSV operation signal

Engine stopped, ignition switch ON

11 to 14 V

Idling with warm engine, under purge control

Pulse generation

(See waveform 12)

D104-70(IGT3) - A106-10(E1)

No. 3 ignition coil assembly signal (ignition signal)

Idling with warm engine

Pulse generation

(See waveform 13)

D104-71(IGT2) - A106-10(E1)

No. 2 ignition coil assembly signal (ignition signal)

Idling with warm engine

Pulse generation

(See waveform 13)

D104-72(IGT1) - A106-10(E1)

No. 1 ignition coil assembly signal (ignition signal)

Idling with warm engine

Pulse generation

(See waveform 13)

D104-62(LIN) - A106-10(E1)

LIN communication line

Engine stopped, ignition switch ON

Pulse generation

(See waveform 14)

D104-65(R) - A106-10(E1)

Reverse signal

Ignition switch ON, shift lever in R

11 to 14 V

D104-84(VCVG) - A106-10(E1)

Power source of mass air flow meter sub-assembly (specific voltage)

Ignition switch ON

4.8 to 5.2 V

D104-120(VCPF) - A106-10(E1)

Power source of fuel pressure sensor (for low pressure side) (specific voltage)

Ignition switch ON

4.75 to 5.25 V

D104-87(VTA2) - D104-110(ETA)

Throttle position sensor signal (for sensor malfunction detection)

Ignition switch ON, accelerator pedal fully released

2.1 to 3.1 V

Accelerator pedal fully depressed (engine running)

4.6 to 5.0 V

D104-88(VCV1) - A106-10(E1)

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

Ignition switch ON

4.5 to 5.5 V

D104-90(VV1+) - D104-89(VV1-)

Camshaft position sensor (for intake camshaft) signal

Idling with warm engine

Pulse generation

(See waveform 15)

D104-91(EV1+) - D104-114(EV1-)

Camshaft position sensor (for exhaust camshaft) signal

Idling with warm engine

Pulse generation

(See waveform 15)

D104-92(NE+) - D104-115(NE-)

Crankshaft position sensor signal

Idling with warm engine

Pulse generation

(See waveform 16)

D104-97(PR) - D104-73(EPR)

Fuel pressure sensor (for high pressure side) signal

Idling with warm engine

0.5 to 4.5 V

D104-96(VCPR) - D104-73(EPR)

Power source of fuel pressure sensor (for high pressure side) (specific voltage)

Ignition switch ON

4.75 to 5.25 V

D104-77(VCPE) - D104-78(EPEO)

Power source of engine oil pressure and temperature sensor (specific voltage)

Ignition switch ON

4.5 to 5.5 V

D104-107(VG) - D104-83(E2G)

Mass air flow meter sub-assembly signal

Ignition switch ON

Pulse generation

(See waveform 17)

D104-106(THA) - D104-83(E2G)

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

D104-121(PFL) - D104-119(EPFL)

Fuel pressure sensor (for low pressure side) signal

Idling with warm engine

0.57 to 4.88 V

D104-108(VTA1) - D104-110(ETA)

Throttle position sensor signal (for engine control)

Ignition switch ON, accelerator pedal fully released

0.6 to 1.1 V

Accelerator pedal fully depressed (engine running)

3.2 to 4.8 V

D104-109(VCTA) - D104-110(ETA)

Power source of throttle position sensor (specific voltage)

Ignition switch ON

4.5 to 5.5 V

D104-111(KNK1) - D104-112(EKNK)

Knock control sensor signal

Engine speed maintained at 4000 rpm after warming up engine

Pulse generation

(See waveform 18)

D104-113(VCE1) - A106-10(E1)

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

Ignition switch ON

4.5 to 5.5 V

D104-116(VCNE) - A106-10(E1)

Power source of crankshaft position sensor (specific voltage)

Ignition switch ON

4.5 to 5.5 V

D104-117(A1B-) - A106-10(E1)

Air fuel ratio sensor (sensor 2) signal

Ignition switch ON

1.17 to 4.49 V

D104-118(A1B+) - A106-10(E1)

Air fuel ratio sensor (sensor 2) signal

Ignition switch ON

1.53 to 5.96 V

D104-98(PIM) - D104-76(EPIM)

No. 1 turbo pressure sensor signal

Ignition switch ON

3.0 to 4.5 V

D104-75(VCPM) - D104-76(EPIM)

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

Ignition switch ON

4.75 to 5.25 V

D104-100(PEO) - D104-78(EPEO)

Engine oil pressure sensor (engine oil pressure and temperature sensor) signal

Idling with warm engine

0.5 to 4.5 V

D104-101(THEO) - D104-78(EPEO)

Engine oil pressure sensor (engine oil pressure and temperature sensor) signal

Ignition switch ON

0.54 to 4.86 V

D104-129(THW) - D104-130(ETHW)

Engine coolant temperature sensor signal

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

0.2 to 1.0 V

D104-18(+BD3) - A106-10(E1)

Power source of ECU (injector driver)

Ignition switch ON

11 to 14 V

D104-38(+BD2) - A106-10(E1)

Power source of ECU (injector driver)

Ignition switch ON

11 to 14 V

D104-49(AICV) - A106-10(E1)

Vacuum switching valve for air intake control valve operation signal

Ignition switch ON

11 to 14 V

D104-20(ABV) - A106-10(E1)

Air by-pass valve assembly operation signal

Engine stopped, ignition switch ON

11 to 14 V

Air by-pass valve assembly operating

Below 1.5 V

D104-94(A1A-) - A106-10(E1)

Air fuel ratio sensor (sensor 1) signal

Ignition switch ON

1.17 to 4.49 V

D104-95(A1A+) - A106-10(E1)

Air fuel ratio sensor (sensor 1) signal

Ignition switch ON

1.53 to 5.96 V

D104-99(THIM) - A106-10(E1)

Intake air temperature sensor (No. 1 turbo pressure sensor) signal

Idling with warm engine

0 to 5.25 V

D104-82(VCPC) - D104-81(EPIC)

Power source of Vacuum sensor (specific voltage)

Ignition switch ON

4.5 to 5.5 V

D104-105(PIC) - D104-81(EPIC)

Vacuum sensor signal

Idling with warm engine

1.0 to 4.5 V

D104-80(VPTA) - D104-79(EPTA)

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

Ignition switch ON

4.5 to 5.5 V

D104-103(PTA) - D104-79(EPTA)

No. 2 turbo pressure sensor signal

Idling with warm engine

1.0 to 4.5 V

D104-102(THTA) - A106-10(E1)

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

Idling with warm engine

0 to 5.25 V

D104-50(#30) - A106-10(E1)

Port fuel injector assembly signal (No. 3 cylinder)

Idling with warm engine (Data List item "Injection Mode" displaying "Port")

Pulse generation

(See waveform 19)

D104-51(#20) - A106-10(E1)

Port fuel injector assembly signal (No. 2 cylinder)

Idling with warm engine (Data List item "Injection Mode" displaying "Port")

Pulse generation

(See waveform 19)

D104-52(#10) - A106-10(E1)

Port fuel injector assembly signal (No. 1 cylinder)

Idling with warm engine (Data List item "Injection Mode" displaying "Port")

Pulse generation

(See waveform 19)

D104-21(WGV+) - A106-10(E1)

Vacuum regulating valve assembly operation signal

Vacuum regulating valve assembly operating

Pulse generation

D104-22(WGV-) - A106-10(E1)

Vacuum regulating valve assembly operation signal

Vacuum regulating valve assembly operating

Pulse generation

WAVEFORM 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

HINT:

The waveform varies depending on the CAN communication signal.

WAVEFORM 2

Engine Speed Signal

ECM Terminal Name

Between NEO and E1

Tester Range

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

Condition

Idling with warm engine

HINT:

The wavelength becomes shorter as the engine speed increases.

WAVEFORM 3

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

HINT:

The waveform varies depending on the CAN communication signal.

WAVEFORM 4

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)

HINT:

The duty ratio varies depending on the engine coolant temperature.

WAVEFORM 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)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

WAVEFORM 6

Throttle Actuator Operation Signal (Negative Terminal)

ECM Terminal Name

Between M- and E1

Tester Range

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

Condition

Idling with warm engine

HINT:

The duty ratio varies depending on the throttle actuator operation.

WAVEFORM 7

Throttle Actuator Operation Signal (Positive Terminal)

ECM Terminal Name

Between M+ and E1

Tester Range

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

Condition

Idling with warm engine

HINT:

The duty ratio varies depending on the throttle actuator operation.

WAVEFORM 8

Air Fuel Ratio Sensor Heater Operation Signal

ECM Terminal Name

Between HA1A and E1

Between HA1B and E1

Tester Range

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

Condition

Idling with cold engine

WAVEFORM 9

No. 1 (to No. 3) Fuel Injector Assembly Signal

ECM Terminal Name

CH1: Between #1D+ and E1

CH2: Between #1D- and E1

CH1: Between #2D+ and E1

CH2: Between #2D- and E1

CH1: Between #3D+ and E1

CH2: Between #3D- and E1

Tester Range

50 V/DIV., 200 μs./DIV.

Condition

Idling with warm engine.

WAVEFORM 10

Fuel Pump Assembly (for High Pressure Side) Signal

ECM Terminal Name

CH1: Between FP1+ and E1

CH2: Between FP1- and E1

Tester Range

20 V/DIV., 500 μs./DIV.

Condition

Idling with warm engine, Data List item "Injection Mode" displaying "Direct"

WAVEFORM 11

Cam Timing Oil Control Solenoid Assembly Operation Signal

ECM Terminal Name

Between OC1+ and OC1-

Between OE1+ and OE1-

Tester Range

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

Condition

Idling

WAVEFORM 12

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

HINT:

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

WAVEFORM 13

Ignition Coil Assembly Signal (IGT Signal)

ECM Terminal Name

Between IGT (1 to 3) and E1

Tester Range

5 V/DIV, 20 ms/DIV

Condition

Idling with warm engine

HINT:

The wavelength becomes shorter as the engine speed increases.

WAVEFORM 14

LIN Communication Signal (Reference)

ECM Terminal Name

Between LIN and E1

Tester Range

2 V/DIV., 10 ms./DIV.

Condition

Idling with warm engine

WAVEFORM 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

HINT:

The wavelength becomes shorter as the engine speed increases.

WAVEFORM 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

HINT:

The wavelength becomes shorter as the engine speed increases.

WAVEFORM 17

Mass Air Flow Meter Sub-assembly Signal

ECM Terminal Name

Between VG and E2G

Tester Range

1 V/DIV., 100 μs./DIV.

Condition

Ignition switch ON

WAVEFORM 18

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 the engine

HINT:

  • The wavelength becomes shorter as the engine speed increases.
  • The waveforms and amplitudes displayed differ slightly depending on the vehicle.

WAVEFORM 19

Port Fuel Injector Assembly Signal

ECM Terminal Name

Between #10 (to #30) and E1

Tester Range

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

Condition

Idling with warm engine (Data List item "Injection Mode" displaying "Port")

HINT:

  • The wavelength becomes shorter as the engine speed increases.
  • When the port injection injectors are operating, Port is displayed for Injection Mode of the Data List.

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