Sfi System - Terminals Of Ecm(2006/01 - 2010/08)

Brand:

Toyota

Model Name:

Camry ACV40 GSV40

Manual:

Repair Manual

Section:

2Az-Fe Engine Control System

Title:

Sfi System

  1. Waveform 1

  2. Waveform 2

  3. Waveform 3

  4. Waveform 4

  5. Waveform 5

  6. Waveform 6

  7. Waveform 7

  8. Waveform 8

  9. Waveform 9

  10. Waveform 10

  11. Waveform 11

  12. Waveform 12

  13. Waveform 13


​


The wavelength becomes shorter as the engine rpm increases. Camry

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 the terminals, displayed in the Specified Condition column. The illustration above can be used as a reference to identify the ECM terminal locations.

Symbols (Terminal No.)
Wiring Colors
Terminal Descriptions
Conditions
Specified Conditions
BATT (A24-20) - E1 (C24-104)
Y - W-B
Battery (for measuring battery voltage and for ECM memory)
Always
9 to 14 V
+B (A24-2) - E1 (C24-104)
R - W-B
Power source of ECM
Ignition switch to the ON position
9 to 14 V
+B2 (A24-1) - E1 (C24-104)
R - W-B
Power source of ECM
Ignition switch to the ON position
9 to 14 V
+BM (A24-3) - E1 (C24-104)
LG - W-B
Power source of throttle actuator
Always
9 to 14 V
IGT1 (C24-85) - E1 (C24-104)
IGT2 (C24-84) - E1 (C24-104)
IGT3 (C24-83) - E1 (C24-104)
IGT4 (C24-82) - E1 (C24-104)
W - W-B
G-R - W-B
G - W-B
LG - W-B
Ignition coil
(ignition signal)
Idling
Pulse generation
(see waveform 1)
IGF1 (C24-81) - E1 (C24-104)
BR - W-B
Ignition coil
(ignition confirmation signal)
Ignition switch to the ON position
4.5 to 5.5 V
Idling
Pulse generation
(see waveform 1)
NE+ (C24-122) - NE- (C24-121)
G - R
Crankshaft position sensor
Idling
Pulse generation
(see waveform 2)
G2+ (C24-99) - G2- (C24-98)
Y - BR
Camshaft position sensor
Idling
Pulse generation
(see waveform 2)
#10 (C24-108) - E01 (C24-45)
#20 (C24-107) - E01 (C24-45)
#30 (C24-106) - E01 (C24-45)
#40 (C24-105) - E01 (C24-45)
B - W-B
R - W-B
Y - W-B
L - W-B
Injector
Ignition switch to the ON position
9 to 14 V
Idling
Pulse generation
(see waveform 3)
HA1A (C24-109) - E04 (C24-46)
G - W
A/F sensor heater
Ignition switch to the ON position
9 to 14 V
Idling
Below 3.0 V
A1A+ (C24-112) - E1 (C24-104)
L - W-B
A/F sensor
Idling
Below 3.3 V*1
A1A- (C24-113) - E1 (C24-104)
P - W-B
A/F sensor
Idling
Below 3.0 V*1
HT1B (C24-47) - E03 (C24-86)
LG - B
Heated oxygen sensor heater
Ignition switch to the ON position
9 to 14 V
Idling
Below 3.0 V
OX1B (C24-64) - EX1B (C24-87)
W - BR
Heated oxygen sensor
Engine speed maintained at 2,500 rpm for 2 minutes after warming up sensor
Pulse generation
(see waveform 4)
KNK1 (C24-110) - EKNK (C24-111)
G - R
Knock sensor
Engine speed maintained at 4,000 after warming up engine
Pulse generation
(see waveform 5)
SPD (A24-8) - E1 (C24-104)
V - W-B
Speed signal from combination meter
Driving at 20 km/h (12 mph)
Pulse generation
(see waveform 6)
THW (C24-97) - ETHW (C24-96)
B - P
Engine coolant temperature sensor
Idling, Engine coolant temperature 80°C (176°F)
0.2 to 1.0 V
THA (C24-65) - ETHA (C24-88)
P - Y
Intake air temperature sensor
Idling, Intake air temperature 20°C (68°F)
0.5 to 3.4 V
VG (C24-118) - E2G (C24-116)
L-B - SB
Mass air flow meter
Idling, Shift lever position P or N, A/C switch OFF
0.5 to 3.0 V
W (A24-24) - E1 (C24-104)
BR - W-B
MIL
Ignition switch to the ON position (MIL goes off)
Below 3.0 V
Idling
9 to 14 V
STA (A24-48) - E1 (C24-104)
V - W-B
Starter signal
Cranking
5.5 V or more
NSW (C24-52)*2 - E1 (C24-104)
SB - W-B
Starter relay control
Ignition switch to the ON position
Below 1.5 V
Cranking
5.5 V or more
VTA1 (C24-115) - ETA (C24-91)
Y - P
Throttle position sensor (for engine control)
Ignition switch to the ON position, Throttle valve fully closed
0.5 to 1.2 V
Ignition switch to the ON position, Throttle valve fully open
3.2 to 4.8 V
VTA2 (C24-114) - ETA (C24-91)
W-L - P
Throttle position sensor (for sensor malfunction detection)
Ignition switch to the ON position, Accelerator pedal released
2.1 to 3.1 V
Ignition switch to the ON position, Accelerator pedal depressed
4.5 to 5.5 V
VCTA (C24-67) - ETA (C24-91)
B - P
Power source of sensor (specific voltage)
Ignition switch to the ON position
4.5 to 5.5 V
VCPA (A24-57) - EPA (A24-59)
B - Y
Power source of accelerator pedal position sensor (for VPA)
Ignition switch to the ON position
4.5 to 5.5 V
VPA (A24-55) - EPA (A24-59)
G - Y
Accelerator pedal position sensor (for engine control)
Ignition switch to the ON position, Accelerator pedal released
0.5 to 1.1 V
Ignition switch to the ON position, Accelerator pedal fully depressed
2.6 to 4.5 V
VPA2 (A24-56) - EPA2 (A24-60)
R - O
Accelerator pedal position sensor (for sensor malfunctioning detection)
Ignition switch to the ON position, Accelerator pedal released
1.2 to 2.0 V
Ignition switch to the ON position, Accelerator pedal fully depressed
3.4 to 5.0 V
VCP2 (A24-58) - EPA2 (A24-60)
L - O
Power source of accelerator pedal position sensor (for VPA2)
Ignition switch to the ON position
4.5 to 5.0 V
M+ (C24-42) - ME01 (C24-43)
G - B
Throttle actuator
Idling with warm engine
Pulse generation
(see waveform 7)
M- (C24-41) - ME01 (C24-43)
R - B
Throttle actuator
Idling with warm engine
Pulse generation
(see waveform 8)
STP (A24-36) - E1 (C24-104)
W - W-B
Stop light switch
Brake pedal depressed
9 to 14 V
Brake pedal released
Below 1.5 V
ST1- (A24-35) - E1 (C24-104)
GR - W-B
Stop light switch
Ignition switch to the ON position, Brake pedal depressed
Below 1.5 V
Ignition switch to the ON position, Brake pedal released
9 to 14 V
PRG (C24-49) - E1 (C24-104)
O - W-B
Purge VSV
Ignition switch to the ON position
9 to 14 V
Idling
Pulse generation
(see waveform 9)
FC (A24-7) - E1 (C24-104)
Y - W-B
Fuel pump control
Ignition switch to the ON position
9 to 14 V
Idling
Below 1.5 V
TACH (A24-15) - E1 (C24-104)
B - W-B
Engine speed
Idling
Pulse generation
(see waveform 10)
TC (A24-27) - E1 (C24-104)
P - W-B
Terminal TC of DLC3
Ignition switch to the ON position
9 to 14 V
OC1+ (C24-100) - OC1- (C24-123)
W - B
Camshaft timing oil control valve (OCV)
Idling
Pulse generation
(see waveform 11)
CANH (A24-41) - E1 (C24-104)
B - W-B
CAN communication line
Ignition switch to the ON position
Pulse generation
(see waveform 12)
CANL (A24-49) - E1 (C24-104)
W - W-B
CAN communication line
Ignition switch to the ON position
Pulse generation
(see waveform 13)
FANL (A24-21) - E1 (C24-104)
R - W-B
FAN NO. 3 relay
Ignition switch to the ON position
9 to 14 V
Idling with A/C ON
or
High engine coolant temperature
Below 1.5 V
FANH (A24-22) - E1 (C24-104)
W - W-B
FAN NO. 1, 2 relay
Idling with high engine coolant temperature
Below 1.5 V
ALT (C24-50) - E1 (C24-104)
R - W-B
Generator
Ignition switch to the ON position
9 to 14 V
IGSW (A24-28) - E1 (C24-104)
Y - W-B
Ignition switch
Ignition switch to the ON position
9 to 14 V
MREL (A24-44) - E1 (C24-104)
O - W-B
EFI MAIN relay
Ignition switch to the ON position
9 to 14 V
HINT:
*1: The ECM terminal voltage is constant regardless of the output voltage from the sensor.
*2: Automatic transaxle only

WAVEFORM 1
The wavelength becomes shorter as the engine rpm increases. Camry
Igniter IGT signal (from ECM to igniter)
ECM Terminal Name
Between IGT (1 to 4) and E1
Between IGF1 and E1
Tester Range
2 V/DIV., 20 ms./DIV.
Condition
Idling
HINT:
The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 2
The wavelength becomes shorter as the engine rpm increases. Camry
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
Idle after engine warmed-up
HINT:
The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 3
The wavelength becomes shorter as the engine rpm increases. Camry
Injector No. 1 (to No. 4) injector signal
ECM Terminal Name
Between #10 (to #40) and E01
Tester Range
20 V/DIV., 20 ms./DIV.
Condition
Idling
HINT:
The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 4
The wavelength becomes shorter as the engine rpm increases. Camry
Heated oxygen sensor (bank 1 sensor 2)
ECM Terminal Name
Between OX1B and EX1B
Tester Range
0.2 V/DIV., 200 ms./DIV.
Condition
Maintain engine speed at 2,500 rpm for 2 minutes after warming up sensor
HINT:
In the Data List, the items O2S B1 S2 show the ECM input values of the heated oxygen sensor.

WAVEFORM 5
The wavelength becomes shorter as the engine rpm increases. Camry
Knock sensor
ECM Terminal Name
Between KNK1 and EKNK
Tester Range
1 V/DIV., 1 ms./DIV.
Condition
Maintain engine RPM at 4,000 rpm after engine warmed-up
HINT:
  1. The wavelength becomes shorter as the engine rpm increases.
  2. The waveforms and amplitudes displayed differ slightly depending on the vehicle.

WAVEFORM 6
Sfi System - Problem Symptoms Table(2010/08 - ) Camry
Vehicle speed signal
ECM Terminal Name
Between SPD and E1
Tester Range
5 V/DIV., 20 ms./DIV.
Condition
Rotate driving wheel slowly
HINT:
The wavelength becomes shorter as the vehicle speed increases.

WAVEFORM 7
Sfi System - Problem Symptoms Table(2010/08 - ) Camry
Throttle actuator positive terminal
ECM Terminal Name
Between M+ and ME01
Tester Range
5 V/DIV., 1 ms./DIV.
Condition
Idle after engine warmed-up
HINT:
The duty ratio varies depending on the throttle actuator operation.

WAVEFORM 8
Sfi System - Problem Symptoms Table(2010/08 - ) Camry
Throttle actuator negative terminal
ECM Terminal Name
Between M- and ME01
Tester Range
5 V/DIV., 1 ms./DIV.
Condition
Idle after engine warmed-up
HINT:
The duty ratio varies depending on the throttle actuator operation.

WAVEFORM 9
Sfi System - Problem Symptoms Table(2010/08 - ) Camry
Purge VSV
ECM Terminal Name
Between PRG and E1
Tester Range
5 V/DIV., 50 ms./DIV.
Condition
Idling
HINT:
If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.

WAVEFORM 10
Sfi System - Problem Symptoms Table(2010/08 - ) Camry
Engine speed signal
ECM Terminal Name
Between TACH and E1
Tester Range
5 V/DIV., 10 ms./DIV.
Condition
Idling
HINT:
The wavelength becomes shorter as the engine rpm increases.

WAVEFORM 11
Sfi System - Problem Symptoms Table(2010/08 - ) Camry
Camshaft timing oil control valve (OCV)
ECM Terminal Name
Between OC1+ and OC1-
Tester Range
5 V/DIV., 1 ms./DIV.
Condition
Idling

WAVEFORM 12
Sfi System - Problem Symptoms Table(2010/08 - ) Camry
CAN communication signal
ECM Terminal Name
Between CANH and E1
Tester Range
1 V/DIV., 10 μsec./DIV.
Condition
Engine stop and ignition switch to the ON position
HINT:
The waveform varies depending on the CAN communication signal.

WAVEFORM 13
Sfi System - Problem Symptoms Table(2010/08 - ) Camry
CAN communication signal
ECM Terminal Name
Between CANL and E1
Tester Range
1 V/DIV., 10 μsec./DIV.
Condition
Engine stop and ignition switch to the ON position
HINT:
The waveform varies depending on the CAN communication signal.