Sfi System Terminals Of Ecm

Engine Hybrid System. Corolla. Zre142 Aze141
2Az-Fe Engine Control. Corolla. Zre142 Aze141

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Sfi System -- Terminals Of Ecm



Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm

HINT:
The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated. The result of checks should be compared with the standard normal voltage for that pair of terminals, 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
A50-20 (BATT) - B31-104 (E1)
P - BR
Battery (for measuring battery voltage and for ECM memory)
Always
11 to 14 V
A50-3 (+BM) - B31-104 (E1)
B - BR
Power source of throttle actuator
Always
11 to 14 V
A50-28 (IGSW) - B31-104 (E1)
B - BR
Ignition switch
Ignition switch ON
11 to 14 V
A50-2 (+B) - B31-104 (E1)
B - BR
Power source of ECM
Ignition switch ON
11 to 14 V
A50-1 (+B2) - B31-104 (E1)
B - BR
Power source of ECM
Ignition switch ON
11 to 14 V
B31-100 (OC1+) - B31-123 (OC1-)
B - V
Camshaft timing oil control valve
Idling
Pulse generation (see waveform 1)
A50-44 (MREL) - B31-104 (E1)
L - BR
EFI MAIN relay
Ignition switch ON
11 to 14 V
B31-118 (VG) - B31-116 (E2G)
V - B
Mass air flow meter
Idling, Shift lever position P or N (neutral), A/C switch OFF
0.5 to 3.0 V
B31-65 (THA) - B31-88 (ETHA)
P - BR-W
Intake air temperature sensor (built into mass air flow meter)
Idling, Intake air temperature 20°C (68°F)
0.5 to 3.4 V
B31-97 (THW) - B31-96 (ETHW)
B - BR
Engine coolant temperature sensor
Idling, Engine coolant temperature 80°C (176°F)
0.2 to 1.0 V
B31-67 (VCTA) - B31-91 (ETA)
Y - BR
Power source of throttle position sensor (specific voltage)
Ignition switch ON
4.5 to 5.5 V
B31-115 (VTA1) - B31-91 (ETA)
LG - BR
Throttle position sensor (for engine control)
Ignition switch ON,
Accelerator pedal fully released
0.5 to 1.1 V
Ignition switch ON,
Accelerator pedal fully depressed
3.2 to 4.8 V
B31-114 (VTA2) - B31-91 (ETA)
R - BR
Throttle position sensor (for sensor malfunction detection)
Ignition switch ON,
Accelerator pedal fully released
2.1 to 3.1 V
Ignition switch ON,
Accelerator pedal fully depressed
4.6 to 5.0 V
A50-55 (VPA) - A50-59 (EPA)
L - R
Accelerator pedal position sensor (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
A50-56 (VPA2) - A50-60 (EPA2)
Y - BE
Accelerator pedal position sensor (for sensor malfunctioning detection)
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
A50-57 (VCPA) - A50-59 (EPA)
P - R
Power source of accelerator pedal position sensor (for VPA)
Ignition switch ON
4.5 to 5.5 V
A50-58 (VCP2) - A50-60 (EPA2)
B - BE
Power source of accelerator pedal position sensor (for VPA2)
Ignition switch ON
4.5 to 5.5 V
B31-109 (HA1A) - B31-46 (E04)
R - W-B
Air fuel ratio sensor heater
Idling
Pulse generation (see waveform 2)
Ignition switch ON
11 to 14 V
B31-112 (A1A+) - B31-104 (E1)
Y - BR
Air fuel ratio sensor
Ignition switch ON
3.3 V*1
B31-113 (A1A-) - B31-104 (E1)
L - BR
Air fuel ratio sensor
Ignition switch ON
3.0 V*1
B31-47 (HT1B) - B31-86 (E03)
P - W-B
Heated oxygen sensor heater
Ignition switch ON
11 to 14 V
B31-64 (OX1B) - B31-87 (EX1B)
B - LG-B
Heated oxygen sensor
Engine speed maintained at 2500 rpm for 2 minutes after warming up engine
Pulse generation (see waveform 3)
B31-108 (#10) - B31-45 (E01)
B31-107 (#20) - B31-45 (E01)
B31-106 (#30) - B31-45 (E01)
B31-105 (#40) - B31-45 (E01)
V - W-B
R - W-B
G - W-B
LG - W-B
Fuel injector
Ignition switch ON
11 to 14 V
Idling
Pulse generation (see waveform 4)
B31-110 (KNK1) - B31-111 (EKNK)
B - W
Knock sensor
Engine speed maintained at 4000 rpm after warming up engine
Pulse generation (see waveform 5)
B31-99 (G2+) - B31-98 (G2-)
R - W
Camshaft position sensor
Idling
Pulse generation (see waveform 6)
B31-122 (NE+) - B31-121 (NE-)
R - G
Crankshaft position sensor
Idling
Pulse generation (see waveform 6)
B31-85 (IGT1) - B31-104 (E1)
B31-84 (IGT2) - B31-104 (E1)
B31-83 (IGT3) - B31-104 (E1)
B31-82 (IGT4) - B31-104 (E1)
W-L - BR
B - BR
L-B - BR
B - BR
Ignition coil (ignition signal)
Idling
Pulse generation (see waveform 7)
B31-81 (IGF1) - B31-104 (E1)
Y - BR
Ignition coil (ignition confirmation signal)
Ignition switch ON
4.5 to 5.5 V
Idling
Pulse generation (see waveform 7)
B31-49 (PRG) - B31-104 (E1)
L-B - BR
Purge VSV
Ignition switch ON
11 to 14 V
Idling, under purge control
Pulse generation (see waveform 8)
A50-8 (SPD) - B31-104 (E1)
V - BR
Speed signal from combination meter
Driving at 12 mph (20 km/h)
Pulse generation (see waveform 9)
A50-48 (STA) - B31-104 (E1)
LG - BR
Starter signal
Cranking
5.5 V or more
B31-52 (NSW)*2 - B31-104 (E1)
W - BR
Park/neutral position switch signal
Ignition switch ON, shift lever in P or N
Below 2.0 V
Ignition switch ON, shift lever in except P or N
11 to 14 V
A50-36 (STP) - B31-104 (E1)
L - BR
Stop light switch
Brake pedal depressed
7.5 to 14 V
Brake pedal released
Below 1.5 V
A50-35 (ST1-) - B31-104 (E1)
R - BR
Stop light switch
(opposite to STP terminal)
Ignition switch ON,
Brake pedal depressed
Below 1.5 V
Ignition switch ON,
Brake pedal released
7.5 to 14 V
B31-42 (M+) - B31-43 (ME01)
P - W-B
Throttle actuator
Idling with warm engine
Pulse generation (see waveform 10)
B31-41 (M-) - B31-43 (ME01)
L - W-B
Throttle actuator
Idling with warm engine
Pulse generation (see waveform 11)
A50-7 (FC) - B31-104 (E1)
BE - BR
Fuel pump control
Ignition switch ON
11 to 14 V
Idling
Below 1.5 V
A50-24 (W) - B31-104 (E1)
R - BR
MIL
Ignition switch ON (MIL goes on)
Below 1.5 V
Idling
11 to 14 V
A50-27 (TC) - B31-104 (E1)
P - BR
Terminal TC of DLC3
Ignition switch ON
11 to 14 V
A50-15 (TACH) - B31-104 (E1)
GR - BR
Engine speed
Idling
Pulse generation (see waveform 12)
A50-42 (VPMP) - B31-104 (E1)
W - BR
Vent valve (built into canister pump module)
Ignition switch ON
11 to 14 V
A50-34 (MPMP) - B31-104 (E1)
R - BR
Leak detection pump (built into canister pump module)
Leak detection pump OFF
Below 3 V
Leak detection pump ON
9 to 14 V
B31-70 (VCPP) - B31-94 (EPPM)
V - G
Power source for canister pressure sensor (specific voltage)
Ignition switch ON
4.5 to 5.5 V
B31-71 (PPMP) - B31-94 (EPPM)
Y - G
Canister pressure sensor (built into canister pump module)
Ignition switch ON
3 to 3.6 V
A50-31 (ELS1) - B31-104 (E1)
B - BR
Electric load
Taillight switch ON
7.5 to 14 V
Taillight switch OFF
Below 1.5 V
A50-33 (ELS3) - B31-104 (E1)
G - BR
Electric load
Defogger switch ON
7.5 to 14 V
Defogger switch OFF
Below 1.5 V
A50-21 (FANL) - B31-104 (E1)
R - BR
No. 3 fan relay
Ignition switch ON
11 to 14 V
Idling with A/C ON, or high engine coolant temperature
Below 1.5 V
A50-22 (FANH) - B31-104 (E1)
W - BR
No. 1 and No. 2 fan relay
Idling with high engine coolant temperature
Below 1.5 V
B31-50 (ALT) - B31-104 (E1)
L - BR
Generator
Ignition switch ON
11 to 14 V
A50-41 (CANH) - B31-104 (E1)
Y - BR
CAN communication line
Ignition switch ON
Pulse generation (see waveform 13)
A50-49 (CANL) - B31-104 (E1)
W - BR
CAN communication line
Ignition switch ON
Pulse generation (see waveform 14)
HINT:
*1: The ECM terminal voltage is constant regardless of the output voltage from the sensor.
*2: Automatic Transaxle.

WAVEFORM 1
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
Camshaft Timing Oil Control Valve
ECM Terminal Name
Between OC1+ and OC1-
Tester Range
5 V/DIV., 1 msec./DIV.
Condition
Idling

WAVEFORM 2
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
Air Fuel Ratio Sensor (Sensor 1) Heater
ECM Terminal Name
Between HA1A and E04
Tester Range
5 V/DIV., 10 msec./DIV.
Condition
Idling
HINT:
The wavelength varies in accordance with the engine operating condition.

WAVEFORM 3
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
Heated Oxygen Sensor (Sensor 2)
ECM Terminal Name
Between OX1B and EX1B
Tester Range
0.2 V/DIV., 200 msec./DIV.
Condition
Engine speed maintained at 2500 rpm for 2 minutes after warming up engine
HINT:
In Data List, item O2S B1S2 shows the ECM input values from the heated oxygen sensor.

WAVEFORM 4
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
Injector No. 1 (to No. 4) Injection Signal
ECM Terminal Name
Between #10 (to #40) and E01
Tester Range
20 V/DIV., 20 msec./DIV.
Condition
Idling
HINT:
The wavelength becomes shorter as the engine speed increases.

WAVEFORM 5
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
Knock Sensor
ECM Terminal Name
Between KNK1 and EKNK
Tester Range
1 V/DIV., 1 msec./DIV.
Condition
Engine speed maintained at 4000 rpm after warming up engine
HINT:
  1. The wavelength becomes shorter as the engine speed increases.
  2. The waveforms and amplitudes displayed differ slightly depending on the vehicle.

WAVEFORM 6
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
Crankshaft Position Sensor and Camshaft Position Sensor
ECM Terminal Name
CH1: Between G2+ and G2-
CH2: Between NE+ and NE-
Tester Range
5 V/DIV., 20 msec./DIV.
Condition
Idling
HINT:
The wavelength becomes shorter as the engine speed increases.

WAVEFORM 7
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
Igniter IGT Signal (from ECM to igniter) and Igniter IGF Signal (from igniter to ECM)
ECM Terminal Name
Between IGT (1 to 4) and E1
Between IGF1 and E1
Tester Range
2 V/DIV., 20 msec./DIV.
Condition
Idling
HINT:
The wavelength becomes shorter as the engine speed increases.

WAVEFORM 8
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
Purge VSV
ECM Terminal Name
Between PRG and E1
Tester Range
10 V/DIV., 20 msec./DIV.
Condition
Idling, 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 9
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
Vehicle Speed Signal
ECM Terminal Name
Between SPD and E1
Tester Range
2 V/DIV., 20 msec./DIV.
Condition
Driving at 12 mph (20 km/h)
HINT:
The wavelength becomes shorter as the vehicle speed increases.

WAVEFORM 10
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
Throttle Actuator Positive Terminal
ECM Terminal Name
Between M+ and ME01
Tester Range
5 V/DIV., 1 msec./DIV.
Condition
Idling with warm engine
HINT:
The duty ratio varies depending on the throttle actuator operation.

WAVEFORM 11
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
Throttle Actuator Negative Terminal
ECM Terminal Name
Between M- and ME01
Tester Range
5 V/DIV., 1 msec./DIV.
Condition
Idling with warm engine
HINT:
The duty ratio varies depending on the throttle actuator operation.

WAVEFORM 12
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
Engine Speed Signal
ECM Terminal Name
Between TACH and E1
Tester Range
5 V/DIV., 10 msec./DIV.
Condition
Idling
HINT:
The wavelength becomes shorter as the engine speed increases.

WAVEFORM 13
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
CAN Communication Signal (Reference)
ECM Terminal Name
Between CANH and E1
Tester Range
1 V/DIV., 10 μsec./DIV.
Condition
Ignition switch ON
HINT:
The waveform varies depending on the CAN communication signal.

WAVEFORM 14
Corolla. Zre142 Aze141.2Az-Fe Engine Control.Sfi System.Sfi System Terminals Of Ecm
CAN Communication Signal (Reference)
ECM Terminal Name
Between CANL and E1
Tester Range
1 V/DIV., 10 μsec./DIV.
Condition
Ignition switch ON
HINT:
The waveform varies depending on the CAN communication signal.