2007 NISSAN TIIDA sensor

EC-702
< FUNCTION DIAGNOSIS >[MR18DE]
ENGINE CONTROL SYSTEM
1. Crankshaft position sensor (POS) 2. Comshaft position sensor (PHASE) 3. EVAP canistor purge volume control
solenoid valve
4. ECM 5. Stop lamp switch 6. Accelerator pedal position sensor
PBIA9902J

ENGINE CONTROL SYSTEM
EC-703
< FUNCTION DIAGNOSIS >[MR18DE]
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Component DescriptionINFOID:0000000001161722
1. ASCD steering switch 2. MAIN switch 3. CANCEL switch
4. SET/COAST switch 5. RESUME/ACCELEATE switch 6. Stop lamp switch
7. ASCD brake switch 8. ASCD clutch switch 9. Cluch pedal
ALBIA0273ZZ
Component Reference
Accelerator pedal position sensorEC-948, "
Description"
ASCD brake switchEC-933, "Description"
ASCD steering switchEC-930, "Description"
ASCD vehicle speed sensorEC-940, "Description"
Camshaft position sensor (PHASE)EC-866, "Description"
Crankshaft position sensor (POS)EC-862, "Description"
Cooling fan motorEC-737, "System Diagram"
Electric throttle control actuatorEC-885, "Description"
Engine coolant temperature sensorEC-807, "Description"
EVAP canister purge volume control solenoid valveEC-875, "Description"
Fuel injectorEC-975, "Description"
Fuel pumpEC-978, "Description"
Heated oxygen sensor 1EC-813, "Description"
Heated oxygen sensor 1 heaterEC-828, "Description"
Heated oxygen sensor 2EC-831, "Description"
Heated oxygen sensor 2 heaterEC-841, "Description"
Ignition signalEC-981, "Description"
Intake air temperature sensorEC-804, "Description"

EC-704
< FUNCTION DIAGNOSIS >[MR18DE]
ENGINE CONTROL SYSTEM
Intake valve timing control solenoid valveEC-753, "System Description"
Knock sensorEC-860, "Description"
Mass air flow sensorEC-799, "Description"
Park/neutral position (PNP) switchEC-942, "Description"
PCV valveEC-987, "Description"
Refrigerant pressure sensorEC-988, "Description"
Stop lamp switchEC-945, "Description"
Throttle control motorEC-894, "Description"
Throttle control motor relayEC-891, "Description"
Throttle position sensorEC-924, "Description"
Vehicle speed sensorEC-878, "Description"
Component Reference

MULTIPORT FUEL INJECTION SYSTEM
EC-705
< FUNCTION DIAGNOSIS >[MR18DE]
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MULTIPORT FUEL INJECTION SYSTEM
System DiagramINFOID:0000000001161723
System DescriptionINFOID:0000000001161724
INPUT/OUTPUT SIGNAL CHART
*1: This sensor is not used to control the engine system under normal conditions.
*2: This signal is sent to the ECM through CAN communication line.
JMBIA0448GB
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed*
3
Piston position
Fuel injection
& mixture ratio
controlFuel injector Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Intake air temperature sensor Intake air temperature
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Battery
Battery voltage*
3
Knock sensor Engine knocking condition
EPS control unit Power steering operation
Heated oxygen sensor 2*
1Density of oxygen in exhaust gas
ABS actuator and electric unit (control unit)*
2ABS operation command
Air conditioner switch*
2Air conditioner operation
Combination meter*
2Vehicle speed

EC-706
< FUNCTION DIAGNOSIS >[MR18DE]
MULTIPORT FUEL INJECTION SYSTEM
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
by input signals (for engine speed and intake air) from the crankshaft position sensor (POS), camshaft position
sensor (PHASE) and the mass air flow sensor.
VARIOUS FUEL INJECTION INCREASE/DECREASE COMPENSATION
In addition, the amount of fuel injected is compensated to improve engine performance under various operat-
ing conditions as listed below.
 During warm-up
 When starting the engine
 During acceleration
 Hot-engine operation
 High-load, high-speed operation
 During deceleration
 During high engine speed operation
MIXTURE RATIO FEEDBACK CONTROL (CLOSED LOOP CONTROL)
The mixture ratio feedback system provides the best air-fuel mixture ratio for driveability and emission control.
The three way catalyst (manifold) can then better reduce CO, HC and NOx emissions. This system uses
heated oxygen sensor 1 in the exhaust manifold to monitor whether the engine operation is rich or lean. The
ECM adjusts the injection pulse width according to the sensor voltage signal. For more information about
heated oxygen sensor 1, refer to EC-813, "
Description". This maintains the mixture ratio within the range of
stoichiometric (ideal air-fuel mixture).
This stage is referred to as the closed loop control condition.
Heated oxygen sensor 2 is located downstream of the three way catalyst (manifold). Even if the switching
characteristics of heated oxygen sensor 1 shift, the air-fuel ratio is controlled to stoichiometric by the signal
from heated oxygen sensor 2.
 Open Loop Control
The open loop system condition refers to when the ECM detects any of the following conditions. Feedback
control stops in order to maintain stabilized fuel combustion.
- Deceleration and acceleration
- High-load, high-speed operation
- Malfunction of heated oxygen sensor 1 or its circuit
- Insufficient activation of heated oxygen sensor 1 at low engine coolant temperature
- High engine coolant temperature
- During warm-up
- When starting the engine
MIXTURE RATIO SELF-LEARNING CONTROL
The mixture ratio feedback control system monitors the mixture ratio signal transmitted from heated oxygen
sensor 1. This feedback signal is then sent to the ECM. The ECM controls the basic mixture ratio as close to
the theoretical mixture ratio as possible. However, the basic mixture ratio is not necessarily controlled as orig-
inally designed. Both manufacturing differences (i.e., mass air flow sensor hot wire) and characteristic
changes during operation (i.e., fuel injector clogging) directly affect mixture ratio.
Accordingly, the difference between the basic and theoretical mixture ratios is monitored in this system. This is
then computed in terms of “injection pulse duration” to automatically compensate for the difference between
the two ratios.
“Fuel trim” refers to the feedback compensation value compared against the basic injection duration. Fuel trim
includes short term fuel trim and long term fuel trim.
“Short term fuel trim” is the short-term fuel compensation used to maintain the mixture ratio at its theoretical
value. The signal from heated oxygen sensor 1 indicates whether the mixture ratio is RICH or LEAN compared
to the theoretical value. The signal then triggers a reduction in fuel volume if the mixture ratio is rich, and an
increase in fuel volume if it is lean.

EC-708
< FUNCTION DIAGNOSIS >[MR18DE]
MULTIPORT FUEL INJECTION SYSTEM
Component Parts Location
INFOID:0000000001603910
1. Ignition coil (with power transistor)
and spark plug2. Intake valve timing control solenoid
valve3. Refrigerant pressure sensor
4. Knock sensor 5. Fuel injector 6. Cooling fan motor
7. Camshaft position sensor (PHASE) 8. IPDM E/R 9. ECM
10. Mass air flow sensor (with intake
temperature sensor)11. Engine coolant temperature sensor 12. Electric throttle control actuator
(with built in throttle position sensor
and throttle control motor)
13. EVAP canister purge volume control
solenoid valve
PBIB3261E

MULTIPORT FUEL INJECTION SYSTEM
EC-709
< FUNCTION DIAGNOSIS >[MR18DE]
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1. Mass air flow sensor
(with intake air temperature sensor)2. Engine coolant temperature sensor 3. Electric throttle control actuator
(with built in throttle position sensor,
throttle control motor)
4. PCV valve 5. Cooling fan motor 6. Resistor
7. Refrigerant pressure sensor
BBIA0724E

EC-710
< FUNCTION DIAGNOSIS >[MR18DE]
MULTIPORT FUEL INJECTION SYSTEM
1. Intake valve timing control solenoid
valve2. Knock sensor 3. IPDM E/R
4. Fuel pump fuse 5. Fuel level sensor unit and fuel pump
harness connector
(view with inspection hole cover re-
moved)6. Fuel level sensor unit and fuel pump
7. Fuel pressure regulator 8. Fuel level sensor 9. Fuel tank temperature sensor
10. Ignition coil 11. Fuel injector
BBIA0735E