Nissan Qashqai J11. Manual - part 1095

HAC-16

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

COMPONENT PARTS

• Rotation of motor is transmitted to mode door (center ventilator and defroster door, sub defroster door, side

ventilator door, and foot door) by link, rod, and lever, then air outlet is switched.

MODE DOOR MOTOR DRIVE METHOD

• The 4 drive coils are excited in sequence in order to drive the motor.
• Direction of rotation is changeable by recomposing pattern of excitation.

A/C UNIT ASSEMBLY : Intake Door Motor

INFOID:0000000010432159

DESCRIPTION

• The step motor system is adopted for intake door motor.
• When a drive signal is input from A/C auto amp. to door motor, a step motor built into the door motor rotates

according to the drive signal, and then stops at the target door position.

• Rotation of motor is transmitted to intake door by lever, then air inlet is switched.

INTAKE DOOR MOTOR (DRIVER SIDE) DRIVE METHOD

• The 4 drive coils are excited in sequence in order to drive the motor.
• Direction of rotation is changeable by recomposing pattern of excitation.

JMIIA3564GB

JMIIA3565GB

COMPONENT PARTS

HAC-17

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

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A/C UNIT ASSEMBLY : Blower Motor

INFOID:0000000010432160

• Brush motor, that rotates coil while brush functions as contact

points, is adopted for blower motor.

• Rotation speed changes according to voltage from power transis-

tor.

A/C UNIT ASSEMBLY : Power Transistor

INFOID:0000000010432161

• Power transistor, that uses MOS field effect transistor, is adopted

for blower motor speed control.
NOTE:
MOS field effect transistor is a transistor for which the gate portion
is composed of a metal electrode on an oxide layer of semiconduc-
tor. Field effect transistor is controlled by voltage, while ordinary
transistor is controlled by current. Electrode of field effect transistor
is called source, drain, or gate, while electrode of ordinary transis-
tor is called emitter, collector, or base.

• Power transistor continuously controls voltage to blower motor, according to gate voltage from A/C auto

amp.

• This power transistor does not require a HI relay even when the maximum voltage is applied to blower motor

at HI status, because voltage drop is nominal.

A/C UNIT ASSEMBLY : PTC Heater

INFOID:0000000010499375

• PTC heater is installed on passenger lower side of A/C unit assembly.
• Heat element is heated and air flow temperature is increased by

power supply from PTC relay.

JMIIA3336ZZ

JMIIA0793GB

JMIIA3335ZZ

JMIIA2397ZZ

HAC-18

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

COMPONENT PARTS

COMPRESSOR

COMPRESSOR : Magnet Clutch

INFOID:0000000010432162

DESCRIPTION

Compressor is driven by the magnet clutch which is magnetized by electric power supply.

STRUCTURE AND OPERATION

• Magnet clutch consists of pulley, clutch disc, and field coil.
- Pulley is connected with crankshaft pulley of engine via drive belt

and is always rotated while engine is running.

- Clutch disc is connected with drive shaft of compressor.
- Field coil, which becomes a strong electric magnet when electricity

is supplied, strongly pulls clutch disc and presses it to pulley.

• When A/C relay integrated in IPDM E/R turns ON, electricity is

supplied to field coil, clutch disc is presses to pulley, and engine
rotational movement is transmitted from crankshaft pulley 

⇒

 drive

belt 

⇒

 pulley 

⇒

 clutch disc 

⇒

 drive shaft. Compressor is operated.

When A/C relay turns OFF, electricity is not supplied to field coil,
and clutch disc is released from pulley. Compressor is not oper-
ated.

COMPRESSOR : ECV (Electrical Control Valve)

INFOID:0000000010432163

• ECV (Electrical Control Valve) is integrated in the compressor.

IPDM E/R receives the ECV control signal from A/C auto amp. via
CAN communication, and ECV is controlled according to the con-
trol signal transmitted from IPDM E/R.

• ECV is controlled according to the control signal transmitted from

IPDM E/R.
The control signal transmitted by IPDM E/R is controlled according
to the ECV control signal transmitted from A/C auto amp. via CAN
communication.

• ECV varies the air pressure balance in the left and right air spaces

that are divided by the swash plate in order to change the angle of
the swash plate inside the compressor.
By changing the swash plate angle, it changes the piston stroke and controls the refrigerant discharge
amount.

A/C Control

INFOID:0000000010432164

A/C control has switches and display that can set and indicate the
operation of automatic air conditioning system. A/C control transmits
setting status to A/C auto amp. via LIN communication line. A/C auto
amp. controls automatic air conditioning system.

JMIIA1767GB

JMIIA3566GB

JMIIA3334ZZ

COMPONENT PARTS

HAC-19

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

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A/C Auto Amp.

INFOID:0000000010432165

A/C auto amp. controls automatic air conditioning system by input-
ting and calculating signals from each sensor and each switch. A/C
auto amp. has self-diagnosis function. Diagnosis of automatic air
conditioning system can be performed quickly.

Ambient Sensor

INFOID:0000000010503106

Ambient sensor measures ambient air temperature. The sensor
uses a thermistor which is sensitive to the change in temperature.
The electrical resistance of the thermistor decreases as temperature
increases.

In-vehicle Sensor

INFOID:0000000010432167

In-vehicle sensor measures temperature of intake air that flows
through aspirator to passenger room. The sensor uses a thermistor
which is sensitive to the change in temperature. The electrical resis-
tance of the thermistor decreases as temperature increases.

Sunload Sensor

INFOID:0000000010432168

Sunload sensor measures sunload amount. This sensor converts
sunload amount to voltage signal by photodiode and transmits it to
A/C auto amp.

Refrigerant Pressure Sensor

INFOID:0000000010432169

DESCRIPTION

JMIIA3333ZZ

JMIIA1719GB

JMIIA1720GB

JMIIA1956GB