2007 NISSAN TIIDA EC Engine Control System

ENGINE CONTROL SYSTEM
EC-399
< FUNCTION DIAGNOSIS >[HR16DE (WITHOUT EURO-OBD)]
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Component DescriptionINFOID:0000000001693462
1. ASCD steering switch 2. MAIN switch 3. CANCEL switch
4. SET/COAST switch 5. RESUME/ACCELERATE switch 6. ASCD brake switch
7. Stop lamp switch 8. ASCD clutch switch 9. Clutch pedal
ALBIA0273ZZ
Component Reference
Accelerator pedal position sensorEC-572, "
Description"
ASCD brake switchEC-556, "Description"
ASCD steering switchEC-553, "Description"
ASCD vehicle speed sensorEC-564, "Description"
Camshaft position sensor (PHASE)EC-520, "Description"
Crankshaft position sensor (POS)EC-516, "Description"
Cooling fan motorEC-593, "Description"
Electric throttle control actuatorEC-531, "Description"
Engine coolant temperature sensorEC-492, "Description"
Fuel injectorEC-602, "Description"
Fuel pumpEC-605, "Description"
Heated oxygen sensor 1EC-498, "Description"
Heated oxygen sensor 1 heaterEC-613, "Description"
Heated oxygen sensor 2EC-507, "Description"
Heated oxygen sensor 2 heaterEC-620, "Description"
Ignition signalEC-625, "Description"
Intake air temperature sensorEC-623, "Description"
Intake valve timing control solenoid valveEC-528, "Description"

EC-400
< FUNCTION DIAGNOSIS >[HR16DE (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM
Knock sensorEC-514, "Description"
Mass air flow sensorEC-487, "Description"
Park/neutral position switchEC-566, "Description"
PCV valveEC-631, "Description"
Refrigerant pressure sensorEC-632, "Description"
Stop lamp switchEC-569, "Description"
Throttle control motorEC-540, "Description"
Throttle control motor relayEC-533, "Description"
Throttle position sensorEC-495, "Description"
Vehicle speed sensorEC-634, "Description"
Component Reference

MULTIPORT FUEL INJECTION SYSTEM
EC-401
< FUNCTION DIAGNOSIS >[HR16DE (WITHOUT EURO-OBD)]
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MULTIPORT FUEL INJECTION SYSTEM
System DiagramINFOID:0000000001693463
System DescriptionINFOID:0000000001693464
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.
*3: ECM determines the start signal status by the signals of engine speed and battery voltage.
JMBIA0408GB
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
BCM
Air conditioner operation*
2
Combination meter
Vehicle speed*2

EC-402
< FUNCTION DIAGNOSIS >[HR16DE (WITHOUT EURO-OBD)]
MULTIPORT FUEL INJECTION SYSTEM
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
 When selector lever is changed from N to D (A/T models)
 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-498, "
DTC Logic". 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 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.
PBIB2953E

EC-404
< FUNCTION DIAGNOSIS >[HR16DE (WITHOUT EURO-OBD)]
MULTIPORT FUEL INJECTION SYSTEM
Component Parts Location
INFOID:0000000001693465
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 air
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
PBIB2939E

MULTIPORT FUEL INJECTION SYSTEM
EC-405
< FUNCTION DIAGNOSIS >[HR16DE (WITHOUT EURO-OBD)]
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1. Mass air flow sensor
(with intake air temperature sensor)2. Engine coolant temperature sensor 3. Electric throttle control actuator
4. Camshaft position sensor (PHASE) 5. Ignition coil (with power transistor) 6. Fuel injector
7. EVAP canister purge volume control
solenoid valve
Vehicle front
PBIB2940E

EC-410
< FUNCTION DIAGNOSIS >[HR16DE (WITHOUT EURO-OBD)]
ELECTRIC IGNITION SYSTEM
ELECTRIC IGNITION SYSTEM
System DiagramINFOID:0000000001693467
System DescriptionINFOID:0000000001693468
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM through CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
Firing order: 1 - 3 - 4 - 2
The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the
engine. The ignition timing data is stored in the ECM.
The ECM receives information such as the injection pulse width and camshaft position sensor (PHASE) sig-
nal. Computing this information, ignition signals are transmitted to the power transistor.
During the following conditions, the ignition timing is revised by the ECM according to the other data stored in
the ECM.
 At starting
 During warm-up
 At idle
 At low battery voltage
 During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
JMBIA0174GB
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed*
2
Piston position
Ignition timing
controlIgnition coil (with power transis-
tor) Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Battery
Battery voltage*
2
Knock sensor Engine knocking
Park/neutral position (PNP) switch Gear position
Combination meter*
1Vehicle speed

ELECTRIC IGNITION SYSTEM
EC-411
< FUNCTION DIAGNOSIS >[HR16DE (WITHOUT EURO-OBD)]
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operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
Component Parts LocationINFOID:0000000001693469
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 air
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
PBIB2939E