Nissan Note E12. Manual — part 172
SYSTEM
EC-27
< SYSTEM DESCRIPTION >
[HR16DE]
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SYSTEM
ENGINE CONTROL SYSTEM
ENGINE CONTROL SYSTEM : System Description
INFOID:0000000009022448
SYSTEM DIAGRAM
NOTE:
JPBIA5483GB
EC-28
< SYSTEM DESCRIPTION >
[HR16DE]
SYSTEM
Buttery current sensor is not apply.
SYSTEM DESCRIPTION
ECM controls the engine by various functions.
ENGINE CONTROL SYSTEM : Fail Safe
INFOID:0000000009582428
NON DTC RELATED ITEM
DTC RELATED ITEM
Function
Reference
Fuel injection control
EC-30, "MULTIPORT FUEL INJECTION SYSTEM : System De-
scription"
Electric ignition control
EC-32, "ELECTRIC IGNITION SYSTEM : System Description"
Intake valve timing control
EC-37, "INTAKE VALVE TIMING CONTROL : System Description"
Exhaust valve timing control
EC-38, "EXHAUST VALVE TIMING CONTROL : System Descrip-
tion"
Engine protection control (Low engine oil pressure)
EC-38, "ENGINE PROTECTION CONTROL AT LOW ENGINE
OIL PRESSURE : System Description"
Air conditioning cut control
EC-33, "AIR CONDITIONING CUT CONTROL : System Descrip-
tion"
Cooling fan control
EC-35, "COOLING FAN CONTROL : System Description"
Evaporative emission
EC-36, "EVAPORATIVE EMISSION SYSTEM : System Descrip-
tion"
Warning/Indicator/Chime control
EC-39, "WARNING/INDICATOR/CHIME LIST : Warning lamps/In-
dicator lamps"
CAN communication
EC-34, "CAN COMMUNICATION : System Description"
Detected
items
Engine operating condition
in fail-safe mode
Remarks
Reference page
Malfunction
indicator
lamp circuit
Engine speed will not rise
more than 2,500 rpm due
to the fuel cut
When there is an open circuit on MIL circuit, the ECM cannot warn the
driver by lighting up MIL when there is malfunction on engine control
system.
Therefore, when electrical controlled throttle and part of ECM related
diagnoses are continuously detected as NG for 5 trips, ECM warns the
driver that engine control system malfunctions and MIL circuit is open
by means of operating fail safe function.
The fail safe function also operates when above diagnoses except MIL
circuit are detected and demands the driver to repair the malfunction.
DTC No.
Detected items
Engine operating condition in fail safe mode
P0011
Intake valve timing control
The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
P0014
Exhaust valve timing control
The signal is not energized to the exhaust valve timing control solenoid valve and the valve
control does not function.
P0102
P0103
Mass air flow sensor circuit
Engine speed will not rise more than 2,400 rpm due to the fuel cut.
SYSTEM
EC-29
< SYSTEM DESCRIPTION >
[HR16DE]
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MULTIPORT FUEL INJECTION SYSTEM
P0117
P0118
Engine coolant temperature
sensor circuit
Engine coolant temperature will be determined by ECM based on the following conditions.
CONSULT displays the engine coolant temperature decided by ECM.
Condition
Engine coolant temperature decided
(CONSULT display)
Just as ignition switch is turned ON or START
40
°C (104°F)
Approx. 4 minutes or more after engine starting
80
°C (176°F)
Except as shown above
40 - 80
°C (104 - 176°F)
(Depends on the time)
When the fail safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135
Throttle position sensor
The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
P0197
P0198
Engine oil temperature sensor
Exhaust valve timing control does not function.
P0500
Vehicle speed sensor
The cooling fan operates (Highest) while engine is running.
P0605
ECM
(When ECM calculation function is malfunctioning:)
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P0643
Sensor power supply
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1805
Brake switch
ECM controls the electric throttle control actuator by regulating the throttle opening to a
small range.
Therefore, acceleration will be poor.
Vehicle condition
Driving condition
When engine is idling
Normal
When accelerating
Poor acceleration
P2100
P2103
Throttle control motor relay
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2101
Electric throttle control function
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2118
Throttle control motor
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2119
Electric throttle control actuator
(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.
(When throttle valve opening angle in fail safe mode is not in specified range:)
ECM controls the electric throttle control actuator by regulating the throttle opening to 20
degrees or less.
(When ECM detects the throttle valve is stuck open:)
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops, the
engine stalls.
The engine can restart in the Neutral position, and engine speed will not exceed 1,000 rpm
or more.
P2122
P2123
P2127
P2128
P2138
Accelerator pedal position sen-
sor
The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
So, the acceleration will be poor.
DTC No.
Detected items
Engine operating condition in fail safe mode
EC-30
< SYSTEM DESCRIPTION >
[HR16DE]
SYSTEM
MULTIPORT FUEL INJECTION SYSTEM : System Description
INFOID:0000000009022451
SYSTEM DIAGRAM
*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This sensor is not used to control the engine system under normal conditions.
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, camshaft position sen-
sor 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.
<Fuel increase>
• During warm-up
• When starting the engine
• During acceleration
• Hot-engine operation
• When selector lever position is changed from N to D (CVT models)
• High-load, high-speed operation
<Fuel decrease>
• During deceleration
• During high engine speed operation
JSBIA3075GB
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