Nissan Qashqai J11. Manual - part 260

COMPONENT PARTS

ECM-17

< SYSTEM DESCRIPTION >

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ECM

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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

ECM-26, "Cooling Fan"

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 >

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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