Nissan Qashqai J11. Manual - part 262

COMPONENT PARTS

ECM-25

< SYSTEM DESCRIPTION >

[MR20DD]

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Heated Oxygen Sensor 2

INFOID:0000000010702802

DESCRIPTION

The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas.
Even if switching characteristics of the air fuel ratio (A/F) sensor 1
are shifted, the air fuel ratio is controlled to stoichiometric, by the sig-
nal from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1 V in richer conditions to 0 V in leaner con-
ditions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.

HEATED OXYGEN SENSOR 2 HEATER

Heated oxygen sensor 2 heater is integrated in the sensor.
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to the engine speed,
amount of intake air and engine coolant temperature. 

Operation

Barometric Pressure Sensor

INFOID:0000000010702803

The barometric pressure sensor is attached to the battery tray 2.
It detects barometric pressure and sends the voltage signal to the
ECM. The sensor uses a silicon diaphragm which is sensitive to the
change in pressure. As the pressure increases, the voltage rises.

Knock Sensor

INFOID:0000000010702804

The knock sensor is attached to the cylinder block. It senses engine
knocking using a piezoelectric element. A knocking vibration from
the cylinder block is sensed as vibrational pressure. This pressure is
converted into a voltage signal and sent to the ECM.

SEF288D

Engine speed

Heated oxygen sensor 2 heater

Above 3,200 rpm

OFF

Below 3,200 rpm after the following conditions are met.
• Engine: After warming up
• Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and 

at idle for 1 minute under no load

ON

JSBIA4556ZZ

JSBIA0284ZZ

ECM-26

< SYSTEM DESCRIPTION >

[MR20DD]

COMPONENT PARTS

Engine Oil Pressure Sensor

INFOID:0000000010702805

The engine oil pressure (EOP) sensor is detects engine oil pressure
and transmits a voltage signal to the ECM.

Engine Oil Temperature Sensor

INFOID:0000000010702806

The engine oil temperature sensor is used to detect the engine oil
temperature. The sensor modifies a voltage signal from the ECM.
The modified signal returns to the ECM as the engine oil tempera-
ture input. The sensor uses a thermistor which is sensitive to the
change in temperature. The electrical resistance of the thermistor
decreases as temperature increases.

<Reference data>

*: These data are reference values and are measured between ECM terminals.

Cooling Fan

INFOID:0000000010702807

The ECM controls the cooling fan speed corresponding to the vehicle speed, engine coolant temperature, and
cooling fan request signal from A/C auto amp. The cooling fan is consisted of cooling fan motor, which drives
cooling fan, and cooling fan relay which energizes cooling fan motor.

Cooling Fan Resistor

INFOID:0000000010714660

Cooling Fan Resister is installed to the power circuit of Cooling Fan Motor and switches cooling fan speed
between LOW and HIGH.
When Cooling Fan Motor is rotated at LOW speeds, power is supplied to the cooling fan via Cooling Fan
Resistor.

JSBIA0292ZZ

JPBIA5280ZZ

Engine oil temperature

[

°

C (

°

F)]

Voltage

*

 (V)

Resistance (k

Ω

)

–10 (14)

4.4

7.0 - 11.4

20 (68)

3.5

2.37 - 2.63

50 (122)

2.2

0.68 - 1.00

90 (194)

0.9

0.236 - 0.260

110 (230)

0.6

0.143 - 0.153

SEF012P

COMPONENT PARTS

ECM-27

< SYSTEM DESCRIPTION >

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EVAP Canister Purge Volume Control Solenoid Valve

INFOID:0000000010702808

The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canis-
ter. The EVAP canister purge volume control solenoid valve is
moved by ON/OFF pulses from the ECM. The longer the ON pulse,
the greater the amount of fuel vapor that will flow through the valve.

Refrigerant Pressure Sensor

INFOID:0000000010702809

The refrigerant pressure sensor is installed at the liquid tank of the air conditioner system. The sensor uses an
electrostatic volume pressure transducer to convert refrigerant pressure to voltage. The voltage signal is sent
to ECM, and ECM controls cooling fan system.

Stop Lamp Switch and Brake pedal position switch

INFOID:0000000010702810

Stop lamp switch and brake pedal position switch are installed to brake pedal bracket.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).

Clutch Pedal Position Switch

INFOID:0000000010702811

Clutch pedal position switch are installed to clutch pedal bracket.
ECM detects the state of the clutch pedal by those two types of input signal (ON/OFF).

Clutch Interlock Switch

INFOID:0000000010713262

When the clutch pedal is depressed, the clutch interlock switch turns ON and the clutch interlock switch signal
is sent to the ECM. The ECM judges the clutch pedal conditions via the signal (ON or OFF).

JSBIA0651ZZ

JSBIA5008GB

Brake pedal

Brake pedal position switch

Stop lamp switch

Released

ON

OFF

Depressed

OFF

ON

Clutch pedal

Clutch pedal position switch

Released

ON

Depressed

OFF

Clutch pedal

Clutch interlock switch

Released

OFF

Depressed

ON

ECM-28

< SYSTEM DESCRIPTION >

[MR20DD]

COMPONENT PARTS

ASCD Steering Switch

INFOID:0000000010702812

ASCD steering switch has variant values of electrical resistance for each button. ECM reads voltage variation
of switch, and determines which button is operated.