| Last Modified: 07-31-2024 | 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 |
|
|