Sfi System Terminals Of Ecm

Engine. Camry. Acv40 Gsv40
2Az-Fe Engine Control System. Camry. Acv40 Gsv40

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Sfi System -- Terminals Of Ecm



Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Terminals Of Ecm

HINT:
The standard normal voltage 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 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
A24-20 (BATT) - C24-104 (E1)
Y - W-B
Battery (for measuring battery voltage and for ECM memory)
Always
11 to 14 V
A24-3 (+BM) - C24-104 (E1)
LG - W-B
Power source of throttle actuator
Always
11 to 14 V
A24-28 (IGSW) - C24-104 (E1)
Y - W-B
Ignition switch
Ignition switch ON
11 to 14 V
A24-2 (+B) - C24-104 (E1)
R - W-B
Power source of ECM
Ignition switch ON
11 to 14 V
A24-1 (+B2) - C24-104 (E1)
R - W-B
Power source of ECM
Ignition switch ON
11 to 14 V
C24-100 (OC1+) - C24-123 (OC1-)
W - B
Camshaft timing oil control valve
Idling with warm engine
Pulse generation (see waveform 1)
A24-44 (MREL) - C24-104 (E1)
BE - W-B
EFI relay
Ignition switch ON
11 to 14 V
C24-118 (VG) - C24-116 (E2G)
SB - W
Mass air flow meter sub-assembly
Idling with warm engine, shift lever position P or N, A/C switch OFF
0.5 to 3.0 V
C24-65 (THA) - C24-88 (ETHA)
P - Y
Intake air temperature sensor (built into mass air flow meter sub-assembly)
Idling, intake air temperature 0 to 80°C (32 to 176°F)
0.5 to 3.4 V
C24-97 (THW) - C24-96 (ETHW)
B - P
Engine coolant temperature sensor
Idling, engine coolant temperature 60 to 120°C (140 to 248°F)
0.2 to 1.0 V
C24-67 (VCTA) - C24-91 (ETA)
B - P
Power source of throttle position sensor (specific voltage)
Idling with warm engine
4.5 to 5.5 V
C24-115 (VTA1) - C24-91 (ETA)
Y - P
Throttle position sensor (for engine control)
Ignition switch ON,
Accelerator pedal released
0.5 to 1.1 V
Ignition switch ON,
Accelerator pedal fully depressed
3.2 to 4.8 V
C24-114 (VTA2) - C24-91 (ETA)
W-L - P
Throttle position sensor (for sensor malfunction detection)
Ignition switch ON,
Accelerator pedal released
2.1 to 3.1 V
Ignition switch ON,
Accelerator pedal fully depressed
4.6 to 5.0 V
A24-55 (VPA) - A24-59 (EPA)
G - Y
Accelerator pedal position sensor (for engine control)
Ignition switch ON,
Accelerator pedal released
0.5 to 1.1 V
Ignition switch ON,
Accelerator pedal fully depressed
2.6 to 4.5 V
A24-56 (VPA2) - A24-60 (EPA2)
R - BE
Accelerator pedal position sensor (for sensor malfunctioning detection)
Ignition switch ON,
Accelerator pedal released
1.2 to 2.0 V
Ignition switch ON,
Accelerator pedal fully depressed
3.4 to 5.0 V
A24-57 (VCPA) - A24-59 (EPA)
B - Y
Power source of accelerator pedal position sensor (for VPA)
Ignition switch ON
4.5 to 5.5 V
A24-58 (VCP2) - A24-60 (EPA2)
L - BE
Power source of accelerator pedal position sensor (for VPA2)
Ignition switch ON
4.5 to 5.5 V
C24-109 (HA1A) - C24-46 (E04)
G - W
Air fuel ratio sensor heater
Ignition switch ON
11 to 14 V
Idling
Below 3.0 V
C24-112 (A1A+) - C24-104 (E1)
L - W-B
Air fuel ratio sensor
Ignition switch ON
3.3 V*1
C24-113 (A1A-) - C24-104 (E1)
P - W-B
Air fuel ratio sensor
Ignition switch ON
3.0 V*1
C24-47 (HT1B) - C24-86 (E03)
LG - B
Heated oxygen sensor heater
Ignition switch ON
11 to 14 V
Idling with warm engine
Below 3.0 V
C24-64 (OX1B) - C24-87 (EX1B)
W - BR
Heated oxygen sensor
Engine speed maintained at 2500 rpm for 2 minutes after warming up engine
Pulse generation (see waveform 2)
C24-108 (#10) - C24-45 (E01)
C24-107 (#20) - C24-45 (E01)
C24-106 (#30) - C24-45 (E01)
C24-105 (#40) - C24-45 (E01)
B - W-B
R - W-B
Y - W-B
L - W-B
Fuel injector
Ignition switch ON
11 to 14 V
Idling with warm engine
Pulse generation (see waveform 3)
C24-110 (KNK1) - C24-111 (EKNK)
G - R
Knock control sensor
Engine speed maintained at 4000 rpm after warming up engine
Pulse generation (see waveform 4)
C24-99 (G2+) - C24-98 (G2-)
Y - BR
Camshaft position sensor
Idling with warm engine
Pulse generation (see waveform 5)
C24-122 (NE+) - C24-121 (NE-)
G - R
Crankshaft position sensor
Idling with warm engine
Pulse generation (see waveform 5)
C24-85 (IGT1) - C24-104 (E1)
C24-84 (IGT2) - C24-104 (E1)
C24-83 (IGT3) - C24-104 (E1)
C24-82 (IGT4) - C24-104 (E1)
W - W-B
G-R - W-B
G - W-B
LG - W-B
Ignition coil (ignition signal)
Idling with warm engine
Pulse generation (see waveform 6)
C24-63 (GE01) - C24-104 (E1)
G-R - W-B
Shielded earth (ground) circuit of throttle drive motor
Always
Below 1 V
C24-81 (IGF1) - C24-104 (E1)
BR - W-B
Ignition coil (ignition confirmation signal)
Idling with warm engine
Pulse generation (see waveform 6)
C24-49 (PRG) - C24-104 (E1)
Y - W-B
Purge VSV
Ignition switch ON
11 to 14 V
Idling with warm engine
Pulse generation (see waveform 7)
A24-8 (SPD) - C24-104 (E1)
V - W-B
Speed signal from combination meter
Driving at 20 km/h (12 mph)
Pulse generation (see waveform 8)
A24-48 (STA) - C24-104 (E1)
V - W-B
Starter signal
Cranking
5.5 V or more
C24-52 (NSW)*2 - C24-104 (E1)
SB - W-B
Starter relay control
Ignition switch ON, any shift position other than P or N
Below 1.5 V
Cranking
5.5 V higher
A24-36 (STP) - C24-104 (E1)
W - W-B
Stop light switch
Brake pedal depressed
7.5 to 14 V
Brake pedal released
Below 1.5 V
A24-35 (ST1-) - C24-104 (E1)
GR - W-B
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
C24-42 (M+) - C24-43 (ME01)
G - B
Throttle actuator
Idling with warm engine
Pulse generation (see waveform 9)
C24-41 (M-) - C24-43 (ME01)
R - B
Throttle actuator
Idling with warm engine
Pulse generation (see waveform 10)
A24-7 (FC) - C24-104 (E1)
Y - W-B
Fuel pump control
Ignition switch ON
11 to 14 V
Idling with warm engine
Below 1.5 V
A24-24 (W) - C24-104 (E1)
BR - W-B
MIL
Engine coolant temperature sensor disconnected (MIL illuminated)
Below 1.5 V
Idling with warm engine (MIL not illuminated)
11 to 14 V
A24-27 (TC) - C24-104 (E1)
P - W-B
Terminal TC of DLC3
Ignition switch ON
11 to 14 V
A24-15 (TACH) - C24-104 (E1)
B - W-B
Engine speed
Idling with warm engine
Pulse generation (see waveform 11)
A24-21 (FANL) - C24-104 (E1)
R - W-B
FAN No. 3 relay
Ignition switch ON
11 to 14 V
Idling with A/C on, or high engine coolant temperature
Below 1.5 V
C24-104 (E1) - Body ground
W-B - -
Earth (ground) circuit of ECM
Always
Below 1 Ω
C24-43 (ME01) - Body ground
B - -
Earth (ground) circuit of ECM
Always
Below 1 Ω
C24-86 (E03) - Body ground
B - -
Earth (ground) circuit of ECM
Always
Below 1 Ω
C24-45 (E01) - Body ground
W-B - -
Earth (ground) circuit of ECM
Always
Below 1 Ω
C24-44 (E02) - Body ground
B-W - -
Earth (ground) circuit of ECM
Always
Below 1 Ω
C24-46 (E04) - Body ground
W - -
Earth (ground) circuit of ECM
Always
Below 1 Ω
A24-32 (EC) - Body ground
W-B - -
Earth (ground) circuit of ECM
Always
Below 1 Ω
A24-22 (FANH) - C24-104 (E1)
W - W-B
FAN No. 1 and FAN No. 2 relay
Idling with high engine coolant temperature
Below 1.5 V
C24-50 (ALT) - C24-104 (E1)
L - W-B
Generator
Ignition switch ON
11 to 14 V
A24-41 (CANH) - C24-104 (E1)
B - W-B
CAN communication line
Engine stopped and ignition switch ON
Pulse generation (see waveform 12)
A24-49 (CANL) - C24-104 (E1)
W - W-B
CAN communication line
Engine stopped and ignition switch ON
Pulse generation (see waveform 13)
HINT:
*1: The ECM terminal voltage is constant regardless of the output voltage shown on the intelligent tester.
*2: for automatic transaxle models only

WAVEFORM 1
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.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 ms./DIV.
Condition
Idling with warm engine

WAVEFORM 2
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.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 ms./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 3
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Terminals Of Ecm
Fuel Injector No. 1 (to No. 4) Injection 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 4
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Terminals Of Ecm
Knock Control Sensor
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 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 5
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.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 ms./DIV.
Condition
Idling with warm engine
HINT:
The wavelength becomes shorter as the engine speed increases.

WAVEFORM 6
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.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
(1) Between IGT (1 to 4) and E1
(2) Between IGF1 and E1
Tester Range
2 V/DIV., 20 ms./DIV.
Condition
Idling with warm engine
HINT:
The wavelength becomes shorter as the engine speed increases.

WAVEFORM 7
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Terminals Of Ecm
Purge VSV
ECM Terminal Name
Between PRG and E1
Tester Range
10 V/DIV., 20 ms./DIV.
Condition
Idling with warm engine
HINT:
If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.

WAVEFORM 8
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Terminals Of Ecm
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 9
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Terminals Of Ecm
Throttle Actuator Positive Terminal
ECM Terminal Name
Between M+ and ME01
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 10
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Terminals Of Ecm
Throttle Actuator Negative Terminal
ECM Terminal Name
Between M- and ME01
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
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.Sfi System.Sfi System Terminals Of Ecm
Engine Speed Signal
ECM Terminal Name
Between TACH and E1
Tester Range
5 V/DIV., 10 ms./DIV.
Condition
Idling with warm engine
HINT:
The wavelength becomes shorter as the engine speed increases.

WAVEFORM 12
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.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
Engine stopped and ignition switch ON
HINT:
The waveform varies depending on the CAN communication signal.

WAVEFORM 13
Camry. Acv40 Gsv40.2Az-Fe Engine Control System.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
Engine stopped and ignition switch ON
HINT:
The waveform varies depending on the CAN communication signal.