Nissan Qashqai J11. Manual — part 260
COMPONENT PARTS
ECM-17
< SYSTEM DESCRIPTION >
[MR20DD]
C
D
E
F
G
H
I
J
K
L
M
A
ECM
N
P
O
Radiator assembly
Front right side of engine room area
Periphery of pedals
Vehicle front
No.
Component
Function
1.
Refrigerant pressure sensor
ECM-27, "Refrigerant Pressure Sensor"
2.
Fuel pump
ECM-21, "Low Pressure Fuel Pump"
3.
ASCD steering switch
ECM-28, "ASCD Steering Switch"
4.
Combination meter
MIL
ECM-62, "DIAGNOSIS DESCRIPTION : Malfunction Indica-
tor Lamp (MIL)"
5.
Cooling fan register
ECM-26, "Cooling Fan Resistor"
6.
Cooling fan motor
7.
EVAP canister
ECM-27, "EVAP Canister Purge Volume Control Solenoid
Valve"
8.
Clutch interlock switch (M/T models)
ECM-27, "Clutch Interlock Switch"
9.
Clutch pedal position switch (M/T models)
ECM-27, "Clutch Pedal Position Switch"
10.
Accelerator pedal position sensor
ECM-18, "Accelerator Pedal Position Sensor"
11.
Stop lamp switch
ECM-27, "Stop Lamp Switch and Brake pedal position
switch"
12.
Brake pedal position switch
JSBIA5103ZZ
ECM-18
< SYSTEM DESCRIPTION >
[MR20DD]
COMPONENT PARTS
ECM
INFOID:0000000010702785
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the engine.
Accelerator Pedal Position Sensor
INFOID:0000000010702786
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The
ECM uses this signal for the engine operation such as fuel cut.
Electric Throttle Control Actuator
INFOID:0000000010702787
Description
JPBIA4618ZZ
JPBIA4615ZZ
PBIB1741E
COMPONENT PARTS
ECM-19
< SYSTEM DESCRIPTION >
[MR20DD]
C
D
E
F
G
H
I
J
K
L
M
A
ECM
N
P
O
Electric throttle control actuator consists of throttle body, throttle valve, throttle control motor and throttle posi-
tion sensor.
THROTTLE CONTROL MOTOR RELAY
Power supply for the throttle control motor is provided to the ECM via throttle control motor relay. The throttle
control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends
an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition
switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not
provided to the ECM.
THROTTLE CONTROL MOTOR
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
THROTTLE POSITION SENSOR
The throttle position sensor has two sensors. These sensors are a
kind of potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed the voltage signals to the ECM. The ECM judges the
current opening angle of the throttle valve from these signals and the
ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.
Ignition Coil With Power Transistor
INFOID:0000000010702788
Ignition coil with power transistor
The ignition signal from the ECM is sent to and amplified by the
power transistor. The power transistor turns ON and OFF the ignition
coil primary circuit. This ON/OFF operation induces the proper high
voltage in the coil secondary circuit.
JSBIA0270GB
PBIB0145E
JPBIA4613ZZ
ECM-20
< SYSTEM DESCRIPTION >
[MR20DD]
COMPONENT PARTS
Fuel Injector
INFOID:0000000010702789
For the fuel injector, a high pressure fuel injector is used and this
enables a high-pressure fuel injection at a high voltage within a short
time. The ECM is equipped with an injector driver unit and actuates
the fuel injector at a high voltage (approximately 65 V at the maxi-
mum).
High Pressure Fuel Pump
INFOID:0000000010702790
• Balanced flow volume control type single cylinder high pressure fuel pump, which approximately equalize
the amount of injection and pump output, is adopted.
• The high pressure fuel pump is activated by the exhaust camshaft. ECM controls the high pressure fuel
pump control solenoid valve built into the high pressure fuel pump and adjusts the amount of discharge by
changing the suction timing of the low pressure fuel.
- Inflow process: Cam driven lowering plunger let the fuel from low pressure fuel pump induced into high pres-
sure fuel pump.
- Spill process: Although the cam driven plunger start moving upward, inflow check valve still at open position
due to the control solenoid valve, so the fuel is not pressurized and spilled out to low pressure fuel pump
side. By changing the amount of this spill out volume changes the amount of injection.
- Outflow process: When the control solenoid valve turns ON, the inflow check valve is closed, fuel is pressur-
ized and when the pressure exceeds certain point discharge check valve is pushed open to discharge fuel
into fuel rail.
Operating Description
JPBIA4982ZZ
JSBIA0285GB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст