Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000026EF0
Model Year Start: 2023 Model: Corolla Prod Date Range: [09/2022 -           ]
Title: 2ZR-FXE (ENGINE CONTROL): SFI SYSTEM: TERMINALS OF ECM; 2023 - 2025 MY Corolla Corolla HV [09/2022 -        ]

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 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

A46-1 (BATT) - A46-17 (E1)

G - W-B

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

Power switch off

11 to 16 V

A46-2 (+B) - A46-17 (E1)

L - W-B

Power source of ECM

Engine stopped, power switch on (IG)

11 to 14 V

A46-3 (+B2) - A46-17 (E1)

L - W-B

Power source of ECM

Engine stopped, power switch on (IG)

11 to 14 V

A46-6 (MPMP)*2 - A46-17 (E1)*2

LG - W-B

Leak detection pump (canister pump module) signal

Leak detection pump off

Below 3.0 V

Leak detection pump on

11 to 14 V

A46-7 (CCA+) - A46-17 (E1)

V - W-B

Fuel vapor containment valve signal

Power switch on (IG)

Pulse generation

(See waveform 1)

A46-8 (CCA-) - A46-17 (E1)

L - W-B

Fuel vapor containment valve signal

Power switch on (IG)

Pulse generation

(See waveform 1)

A46-9 (CFDH) - A46-17 (E1)

R - W-B

CAN communication line

Engine stopped, power switch on (IG)

Pulse generation

(See waveform 2)

A46-10 (CFDL) - A46-17 (E1)

W - W-B

CAN communication line

Engine stopped, power switch on (IG)

Pulse generation

(See waveform 3)

A46-11 (CFDT) - A46-17 (E1)

GR - W-B

CAN communication line

Engine stopped, power switch on (IG)

Pulse generation

(See waveform 2)

A46-12 (CFDB) - A46-17 (E1)

W - W-B

CAN communication line

Engine stopped, power switch on (IG)

Pulse generation

(See waveform 3)

A46-15 (E01) - Body ground

W-B - -

Ground

Always

Below 1 Ω

A46-17 (E1) - Body ground

W-B - -

Ground

Always

Below 1 Ω

A46-19 (VPMP)*2 - A46-17 (E1)

B - W-B

Vent valve (canister pump module) signal

Power switch on (IG)

11 to 14 V

A46-20 (CCB+) - A46-17 (E1)

W - W-B

Fuel vapor containment valve signal

Power switch on (IG)

Pulse generation

(See waveform 1)

A46-21 (CCB-) - A46-17 (E1)

G - W-B

Fuel vapor containment valve signal

Power switch on (IG)

Pulse generation

(See waveform 1)

A46-22 (NEO) - A46-17 (E1)

L - W-B

Crankshaft revolution signal

Idling with warm engine

Pulse generation

(See waveform 4)

A46-23 (G2O) - A46-17 (E1)

Y - W-B

Camshaft revolution signal

Idling with warm engine

Pulse generation

(See waveform 5)

A46-27 (MREL) - A46-17 (E1)

G - W-B

EFI-MAIN relay operation signal

Engine stopped, power switch on (IG)

Below 1.5 V

A46-28 (FREL)*2 - A46-17 (E1)

LG - W-B

Fuel lid lock with motor assembly operation signal

Fuel lid lock with motor assembly operating

Below 1.0 V

Fuel lid lock with motor assembly not operating

11 to 14 V

A46-29 (FC) - A46-17 (E1)

SB - W-B

Fuel pump control

Engine stopped, power switch on (IG)

11 to 14 V

Idling

Below 1.5 V

A46-30 (LSTM)*2 - A46-17 (E1)

Y - W-B

Fuel lid operation signal for combination meter assembly

Multi-information display displaying "Please Wait Now Opening"

Pulse generation

(see waveform 6)

Multi-information display displaying "Close Fuel Lid"

Pulse generation

(see waveform 7)

Multi-information display displaying "Refuel Ready"

Pulse generation

(see waveform 8)

Power switch on (IG)

11 to 14 V

A46-31 (LIN) - A46-17 (E1)

R - W-B

LIN communication signal

Power switch on (IG)

Pulse generation

A46-32 (EC) - Body ground

W-B - -

Ground

Always

Below 1 Ω

A46-38 (PTNK)*2 - A46-53 (EPTK)*2

B - R

Fuel tank pressure sensor signal

Engine stopped, power switch on (IG)

0.27 to 4.73 V

A46-39 (IGR) - A46-17 (E1)

V - W-B

Ignition signal

Power switch on (IG)

11 to 14 V

A46-40 (PPMP)*2 - A46-55 (EPPM)*2

GR - W

Canister pressure sensor (canister pump module) signal

Power switch on (IG)

3.0 to 3.6 V

A46-41 (IGP) - A46-17 (E1)

BE - W-B

Ignition switch signal

Power switch on (IG)

11 to 14 V

A46-42 (FANL) - A46-17 (E1)

GR - W-B

Cooling fan motor operation signal (low)

Power switch on (IG)

11 to 14 V

Idling, high engine coolant temperature

Below 1.5 V

A46-43 (FANH) - A46-17 (E1)

LG - W-B

Cooling fan motor operation signal (high)

Power switch on (IG)

11 to 14 V

Idling, high engine coolant temperature

Below 1.5 V

A46-54 (VPTK)*2 - A46-53 (EPTK)*2

L - R

Power source of fuel tank pressure sensor (specific voltage)

Engine stopped, power switch on (IG)

4.75 to 5.25 V

A46-56 (VCPP)*2 - A46-55 (EPPM)*2

P - W

Power source for canister pressure sensor (specific voltage)

Power switch on (IG)

4.5 to 5.5 V

A46-59 (LIDO)*2 - A46-17 (E1)

GR - W-B

Fuel lid courtesy switch signal

Fuel lid closed

Below 1.0 V

Fuel lid open

11 to 14 V

A46-60 (FUEL)*2 - A46-17 (E1)

P - W-B

Fuel lid opener switch signal

Fuel lid opener switch pressed

Below 1.0 V

Fuel lid opener switch not pressed

4.5 to 5.5 V

C147-28 (HA1A) - A46-17 (E1)

Y - W-B

Air fuel ratio sensor heater operation signal

Engine stopped, power switch on (IG)

11 to 14 V

Idling with cold engine

Pulse generation

(See waveform 9)

C147-29 (M+) - A46-17 (E1)

B - W-B

Throttle actuator operation signal (positive terminal)

Idling with warm engine

Pulse generation

(See waveform 10)

C147-30 (M-) - A46-17 (E1)

W - W-B

Throttle actuator operation signal (negative terminal)

Idling with warm engine

Pulse generation

(See waveform 11)

C147-33 (PRG) - A46-17 (E1)

V - W-B

Purge VSV operation signal

Engine stopped, power switch on (IG)

11 to 14 V

Idling with warm engine, under purge control

Pulse generation

(See waveform 12)

C147-34 (#10) - A46-15 (E01)

Y - W-B

No. 1 fuel injector assembly signal

Idling with warm engine

Pulse generation

(See waveform 13)

C147-35 (#20) - A46-15 (E01)

B - W-B

No. 2 fuel injector assembly signal

Idling with warm engine

Pulse generation

(See waveform 13)

C147-36 (#30) - A46-15 (E01)

L - W-B

No. 3 fuel injector assembly signal

Idling with warm engine

Pulse generation

(See waveform 13)

C147-37 (#40) - A46-15 (E01)

R - W-B

No. 4 fuel injector assembly signal

Idling with warm engine

Pulse generation

(See waveform 13)

C147-41 (OC1+) - C147-40 (OC1-)

Y - G

Camshaft timing oil control valve assembly operation signal

Idling

Pulse generation

(See waveform 14)

C147-42 (EGR4) - A46-17 (E1)

LG - W-B

EGR valve assembly signal

EGR valve assembly operating

Pulse generation

(See waveform 15)

C147-43 (EGR2) - A46-17 (E1)

V - W-B

EGR valve assembly signal

EGR valve assembly operating

Pulse generation

(See waveform 15)

C147-44 (EGR3) - A46-17 (E1)

Y - W-B

EGR valve assembly signal

EGR valve assembly operating

Pulse generation

(See waveform 15)

C147-45 (EGR1) - A46-17 (E1)

R - W-B

EGR valve assembly signal

EGR valve assembly operating

Pulse generation

(See waveform 15)

C147-56 (HT1B) - A46-17 (E1)

G - W-B

Heated oxygen sensor heater operation signal

Engine stopped, power switch on (IG)

11 to 14 V

Idling with cold engine

Below 3.0 V

C147-70 (WPI) - A46-17 (E1)

G - W-B

Electric water pump assembly signal

Idling with warm engine

Pulse generation

(See waveform 16)

C147-71 (WPO) - A46-17 (E1)

L - W-B

Electric water pump assembly signal

Idling with warm engine

Pulse generation

(See waveform 17)

C147-72 (IGT4) - A46-17 (E1)

Y - W-B

No. 4 ignition coil assembly signal

(ignition signal)

Idling with warm engine

Pulse generation

(See waveform 18)

C147-73 (IGT3) - A46-17 (E1)

G - W-B

No. 3 ignition coil assembly signal

(ignition signal)

Idling with warm engine

Pulse generation

(See waveform 18)

C147-74 (IGT2) - A46-17 (E1)

W - W-B

No. 2 ignition coil assembly signal

(ignition signal)

Idling with warm engine

Pulse generation

(See waveform 18)

C147-75 (IGT1) - A46-17 (E1)

GR - W-B

No. 1 ignition coil assembly signal

(ignition signal)

Idling with warm engine

Pulse generation

(See waveform 18)

C147-80 (NE+) - C147-81 (NE-)

L - W

Crankshaft position sensor signal

Idling with warm engine

Pulse generation

(See waveform 19)

C147-82 (VCNE) - A46-17 (E1)

B - W-B

Power source of crankshaft position sensor (specific voltage)

Power switch on (IG)

4.5 to 5.5 V

C147-87 (PIM) - C147-88 (EPIM)

B - R

Manifold absolute pressure sensor signal

Engine stopped, power switch on (IG)

3.0 to 4.5 V

C147-89 (VCPM) - C147-88 (EPIM)

L - R

Power source of manifold absolute pressure sensor

Engine stopped, power switch on (IG)

4.75 to 5.25 V

C147-92 (KNK1) - C147-91 (EKNK)

B - W

Knock control sensor signal

Engine speed maintained at 2500 rpm after warming up engine

Pulse generation

(See waveform 20)

C147-100 (OX1B) - C147-99 (O1B-)

R - G

Heated oxygen sensor signal

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

Pulse generation

(See waveform 21)

C147-101 (VTA2) - C147-133 (ETA)

B - G

Throttle position sensor signal (for sensor malfunction detection)

Engine stopped, power switch on (IG), accelerator pedal fully released

2.1 to 3.1 V

C147-108 (VCVG) - A46-17 (E1)

G - W-B

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

Power switch on

4.8 to 5.2 V

C147-110 (VV1+) - C147-113 (VV1-)

B - W

Camshaft position sensor signal

Idling with warm engine

Pulse generation

(See waveform 22)

C147-114 (VCV1) - A46-17 (E1)

R - W-B

Power source of camshaft position sensor

Engine stopped, power switch on (IG)

4.5 to 5.5 V

C147-124 (THW) - C147-123 (ETHW)

P - BR

Engine coolant temperature sensor signal

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

0.2 to 1.0 V

C147-128 (THTW)*2 - C147-127 (ETHT)*2

B - L

No. 2 engine coolant temperature sensor signal

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

0.2 to 1.0 V

C147-131 (A1A-) - A46-17 (E1)

Y - W-B

Air fuel ratio sensor signal

Engine stopped, power switch on (IG)

2.2 to 2.8 V*1

C147-132 (A1A+) - A46-17 (E1)

L - W-B

Air fuel ratio sensor signal

Engine stopped, power switch on (IG)

2.2 to 3.5 V*1

C147-134 (VCTA) - C147-133 (ETA)

R - G

Power source of throttle position sensor (specific voltage)

Engine stopped, power switch on (IG)

4.5 to 5.5 V

C147-135 (VTA1) - C147-133 (ETA)

Y - G

Throttle position sensor signal (for engine control)

Engine stopped, power switch on (IG), accelerator pedal fully released

0.6 to 1.1 V

C147-139 (THA) - C147-107 (E2G)

P - B

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

C147-140 (VG) - C147-107 (E2G)

BE - B

Mass air flow meter subassembly signal

Power switch on

Pulse generation

(See waveform 23)

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

*2: w/ Canister Pump Module

WAVEFORM 1

Fuel Vapor-containment Valve Operation Signal

ECM Terminal Name

CH1: Between CCA+ and E1

CH2: Between CCA- and E1

CH1: Between CCB+ and E1

CH2: Between CCB- and E1

Tester Range

5 V/DIV., 5 μs./DIV.

Condition

Ignition switch ON

HINT:

When the fuel vapor-containment valve is operating, a waveform is produced at each terminal.

WAVEFORM 2

CAN Communication Signal (Reference)

ECM Terminal Name

Between CFDH and E1

Between CFDT and E1

Tester Range

1 V/DIV., 10 μs./DIV.

Condition

Engine stopped, power switch on (IG)

HINT:

The waveform varies depending on the CAN communication signal.

WAVEFORM 3

CAN Communication Signal (Reference)

ECM Terminal Name

Between CFDL and E1

Between CFDB and E1

Tester Range

1 V/DIV., 10 μs./DIV.

Condition

Engine stopped, power switch on (IG)

HINT:

The waveform varies depending on the CAN communication signal.

WAVEFORM 4

Crankshaft Revolution Signal from ECM to Inverter with Converter Assembly

ECM Terminal Name

Between NEO 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 5

Camshaft Revolution Signal from ECM to Inverter with Converter Assembly

ECM Terminal Name

Between G2O 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 6

Fuel Lid Operation Signal for Combination Meter Assembly

ECM Terminal Name

Between LSTM and E1

Tester Range

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

Condition

Multi-information display displaying "Please Wait Now Opening"

WAVEFORM 7

Fuel Lid Operation Signal for Combination Meter Assembly

ECM Terminal Name

Between LSTM and E1

Tester Range

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

Condition

Multi-information display displaying "Close Fuel Lid"

WAVEFORM 8

Fuel Lid Operation Signal for Combination Meter Assembly

ECM Terminal Name

Between LSTM and E1

Tester Range

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

Condition

Multi-information display displaying "Refuel Ready"

WAVEFORM 9

Air Fuel Ratio Sensor Heater Operation Signal

ECM Terminal Name

Between HA1A and E1

Tester Range

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

Condition

Idling with cold engine

WAVEFORM 10

Throttle Actuator Positive Terminal Signal

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 11

Throttle Actuator Negative Terminal Signal

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 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

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

HINT:

The wavelength becomes shorter as the engine speed increases.

WAVEFORM 14

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

WAVEFORM 15

EGR Valve Assembly Signal

ECM Terminal Name

Between EGR (1 to 4) and E1

Tester Range

20 V/DIV., 50 ms./DIV.

Condition

EGR valve assembly operating

WAVEFORM 16

Engine Water Pump Assembly Signal (from Engine Water Pump Assembly to ECM)

ECM Terminal Name

Between WPI and E1

Tester Range

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

Condition

Idling with warm engine

HINT:

The wavelength becomes shorter as the engine water pump speed increases.

WAVEFORM 17

Engine Water Pump Assembly Signal (from ECM to Engine Water Pump Assembly)

ECM Terminal Name

Between WPO and E1

Tester Range

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

Condition

Idling with warm engine

HINT:

The duty ratio varies depending on the engine water pump assembly speed.

WAVEFORM 18

Ignition Coil Assembly Signal (IGT Signal)

ECM Terminal Name

Between IGT (1 to 4) 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 19

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 20

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

HINT:

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

WAVEFORM 21

Heated Oxygen Sensor Signal

ECM Terminal Name

Between OX1B and O1B-

Tester Range

0.2 V/DIV., 200 ms./DIV.

Condition

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

HINT:

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

WAVEFORM 22

Camshaft Position Sensor Signal

ECM Terminal Name

Between VV1+ and VV1-

Tester Range

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

Condition

Idling with warm engine

HINT:

The wavelength becomes shorter as the engine speed increases.

WAVEFORM 23

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