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Nissan Juke F15. Manual - part 843

COMPONENT PARTS

HAC-7

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

HAC

SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000012199989

BCM
Refer to

BCS-5, "BODY CONTROL

SYSTEM : Component Parts Loca-
tion"

Magnet clutch

Refrigerant pressure sensor

Ambient sensor

ECM
Refer to

EC-27, "ENGINE CON-

TROL SYSTEM :
Component Parts Location"

IPDM E/R
Refer to

PCS-5, "Component Parts

Location"

Multi display unit

Intake door motor

Air mix door motor

10. Intake sensor

11. In-vehicle sensor

12. Power transistor

13. Aspirator

14. A/C auto amp.

15. Blower motor

16. Mode door motor

17. Sunload sensor

JMIIA1048ZZ

HAC-8

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

COMPONENT PARTS

Component Description

INFOID:0000000012199990

A/C UNIT ASSEMBLY
A/C UNIT ASSEMBLY : Aspirator

INFOID:0000000012199991

The aspirator generates the vacuum by the air blown from the A/C

unit assembly and draws the air of the passenger room to the in-

vehicle sensor area via the aspirator duct.

A/C UNIT ASSEMBLY : Intake Sensor

INFOID:0000000012199992

Intake sensor measures temperature of evaporator fin temperature. The sensor uses a thermistor which is

sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature

increases.

A/C UNIT ASSEMBLY : Air Mix Door Motor

INFOID:0000000012199993

• The step motor system is adopted for air mix 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. Refer to

HAC-16, "Door Control"

• Rotation of motor is transmitted to air mix door (upper air mix door and lower air mix door) by lod and lever.

Air flow temperature is switched.

Left side of A/C unit assembly

Instrument lower panel LH is re-
moved

Back side of A/C unit assembly

Multi display unit is removed

Right side of A/C unit assembly

Right side of switch panel

Component

Description

A/C unit assembly

Aspirator

Intake sensor

Air mix door motor

Mode door motor

Intake door motor

Blower motor

Power transistor

Multi display unit

A/C auto amp.

BCM

ECM

IPDM E/R

Ambient sensor

In-vehicle sensor

Sunload sensor

Refrigerant pressure sensor

HAC-10

Magnet clutch

HAC-11

RJIA1804E

COMPONENT PARTS

HAC-9

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

HAC

A/C UNIT ASSEMBLY : Mode Door Motor

INFOID:0000000012199994

• The step motor system is adopted for mode 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. Refer to

HAC-16, "Door Control"

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

ventilator door, and foot door) by link, lod, and lever. Air outlet is switched.

A/C UNIT ASSEMBLY : Intake Door Motor

INFOID:0000000012199995

• Intake door motor consists of motor that drives door and PBR (Potentio Balance Register) that detects door

position.

• Motor operates intake door according to control signal from A/C auto amp. Refer to

HAC-16, "Door Control"

• Rotation of motor is transmitted to intake door by lever. Air inlet is switched.

• PBR (Potentio Balance Register) transmits PBR feedback signal to A/C auto amp. according to motor posi-

tion.

• According to PBR feedback signal, A/C auto amp. monitors that motor is in an appropriate door position.

A/C UNIT ASSEMBLY : Blower Motor

INFOID:0000000012199996

• The blower motor utilizes a brush-less motor with a rotating mag-

net.

• Quietness is improved over previous motors where the brush was

the point of contact and the coil rotated.

A/C UNIT ASSEMBLY : Power Transistor

INFOID:0000000012199997

• 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.

JPIIA1575ZZ

ZHA152H

JPIIA1634ZZ

HAC-10

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

COMPONENT PARTS

Multi Display Unit

INFOID:0000000012199998

• Multi display unit integrates display and operation switches.

• Operation of each switch (A/C operation signal) and setting status (A/C ECO setting signal and ECO mode

signal) are transmitted to A/C auto amp. via CAN communication.

• Operation status of air conditioning system is indicated in the display according to A/C display signal that is

received from A/C auto amp.

A/C Auto Amp.

INFOID:0000000012199999

A/C auto amp. controls automatic air conditioning system by inputting and calculating signals from each sen-

sor and each switch. A/C auto amp. has self-diagnosis function. Diagnosis of automatic air conditioning sys-

tem can be performed quickly.

BCM

INFOID:0000000012200000

BCM transmits A/C ON signal and blower fan ON signal from A/C auto amp. to ECM via CAN communication

line.

ECM

INFOID:0000000012200001

• ECM, when receiving A/C ON signal and blower fan ON signal from BCM, transmits A/C compressor request

signal to IPDM E/R via CAN communication according to status of the engine and refrigerant pressure.

• ECM transmits engine coolant temperature signal to A/C auto amp. via CAN communication line.

IPDM E/R

INFOID:0000000012200002

A/C relay is integrated in IPDM E/R. IPDM E/R operates A/C relay when A/C compressor request signal is

received from ECM via CAN communication line.

Ambient Sensor

INFOID:0000000012200003

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:0000000012200004

In-vehicle sensor measures temperature of intake air that flows through aspirator to passenger room. The sen-

sor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the ther-

mistor decreases as temperature increases.

Sunload Sensor

INFOID:0000000012200005

Sunload sensor measures sunload amount. This sensor converts sunload amount to voltage signal by photo-

diode and transmits to A/C auto amp.

Refrigerant Pressure Sensor

INFOID:0000000012200006

DESCRIPTION

• The refrigerant pressure sensor converts high-pressure side refrigerant pressure into voltage and outputs it

to ECM.

• ECM operates cooler cycle protection and cooling fan speed control according to voltage value that is input.

STRUCTURE AND OPERATION

PBIB2657E

Content .. 841 842 843 844 ..