Nissan X-Trail 32. Manual - part 1417

COMPONENT PARTS

HAC-143

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

LHD MODELS

BCM

BCM receives each signals, and controls PTC relay.
BCM transmits idle up signal to ECM according to electrical load condition.
Refer to 

BCS-6, "BODY CONTROL SYSTEM : Component Parts Location"

 

for detailed installation location.

Combination meter

Combination meter transmits ambient temperature signal to BCM via CAN 
communication line.

PTC heater

HAC-147, "A/C UNIT ASSEMBLY : PTC Heater"

Blower motor

HAC-146, "A/C UNIT ASSEMBLY : Blower Motor"

No.

Component

Function

JMIIA3682ZZ

HAC-144

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

COMPONENT PARTS

A/C UNIT ASSEMBLY

A/C UNIT ASSEMBLY : Intake Sensor

INFOID:0000000010939803

Intake sensor measures 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:0000000010939804

DESCRIPTION

• The step motor system is adopted for air mix door motor.
• When a drive signal is input from A/C 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 air mix door by link and lever, then air flow temperature is switched.

AIR MIX DOOR MOTOR DRIVE METHOD

• The 4 drive coils are excited in sequence in order to drive the motor.

Right side of A/C unit assembly

No.

Component

Function

Ambient sensor

HAC-148, "Ambient Sensor"

PTC relay-1/2/3

PTC relay is controlled by BCM, and supplies power supply to PTC heater.

ECM

ECM transmits engine speed signal, engine coolant temperature signal, 
cooling fan speed request signal, and electrical power cut freeze signal to 
BCM via CAN communication line.
Refer to 

EC-812, "Component Parts Location"

 for detailed installation loca-

tion.

Combination meter

Combination meter transmits ambient temperature signal to BCM via CAN 
communication line.

BCM

BCM receives each signals, and controls PTC relay.
BCM transmits idle up signal to ECM according to electrical load condition.
Refer to 

BCS-6, "BODY CONTROL SYSTEM : Component Parts Location"

 

for detailed installation location.

PTC heater

HAC-147, "A/C UNIT ASSEMBLY : PTC Heater"

Blower motor

HAC-146, "A/C UNIT ASSEMBLY : Blower Motor"

JSIIA1630GB

COMPONENT PARTS

HAC-145

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

• Direction of rotation is changeable by recomposing pattern of excitation.

A/C UNIT ASSEMBLY : Mode Door Motor

INFOID:0000000010939805

DESCRIPTION

• The step motor system is adopted for mode door motor.
• When a drive signal is input from A/C 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 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:0000000010939806

DESCRIPTION

• The step motor system is adopted for intake door motor.
• When a drive signal is input from A/C 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 DRIVE METHOD

• The 4 drive coils are excited in sequence in order to drive the motor.

JMIIA3683GB

JZIIA0033GB

HAC-146

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

COMPONENT PARTS

• Direction of rotation is changeable by recomposing pattern of excitation.

A/C UNIT ASSEMBLY : Blower Motor

INFOID:0000000010939807

• 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 : Fan Control Amp.

INFOID:0000000010939808

• Fan control amp., 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.

• Fan control amp. continuously controls voltage to blower motor,

according to gate voltage from A/C 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.

JMIIA3565GB

JMIIA3336ZZ

JMIIA0793GB

JMIIA1317ZZ