Nissan Qashqai J11. Manual - part 1151

 

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Nissan Qashqai J11. Manual - part 1151

 

 

HAC-240

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

COMPONENT PARTS

A/C UNIT ASSEMBLY

A/C UNIT ASSEMBLY : Air Mix Door Motor

INFOID:0000000010499402

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

A/C UNIT ASSEMBLY : Mode Door Motor

INFOID:0000000010499403

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.

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 

ECH-13, "Component Parts Location"

 (HR engine models), 

ECK-12, 

"Component Parts Location"

 (K9K engine models) or 

EC9-14, "Component 

Parts Location"

 (R9M engine models) for detailed installation location.

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-242, "A/C UNIT ASSEMBLY : PTC Heater"

Blower motor

HAC-241, "A/C UNIT ASSEMBLY : Blower Motor"

No.

Component

Function

JMIIA3574GB

COMPONENT PARTS

HAC-241

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

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 : Intake Door Motor

INFOID:0000000010499404

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 (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.

A/C UNIT ASSEMBLY : Blower Motor

INFOID:0000000010499405

• 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.

JZIIA0033GB

JMIIA3565GB

JMIIA3336ZZ

HAC-242

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

COMPONENT PARTS

A/C UNIT ASSEMBLY : Fan Control Amp.

INFOID:0000000010499406

• 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.

A/C UNIT ASSEMBLY : PTC Heater

INFOID:0000000010521012

• 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.

Heater Control (A/C Amp.)

INFOID:0000000010499377

Heater control (A/C amp.) controls automatic air conditioning system
by inputting and calculating signals from each sensor and each
switch. A/C amp. has self-diagnosis function. Diagnosis of manual
heater system can be performed quickly.

JMIIA0793GB

JMIIA1317ZZ

JMIIA2397ZZ

JMIIA3575ZZ

COMPONENT PARTS

HAC-243

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Ambient Sensor

INFOID:0000000010503108

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.

JMIIA1719GB

 

 

 

 

 

 

 

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