Nissan Qashqai J11. Manual - part 1127

HAC-144

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

COMPONENT PARTS

PTC HEATER CONTROL SYSTEM

No.

Component

Function

Compressor

Magnet clutch

HAC-149, "COMPRESSOR : Magnet Clutch"

ECV (Electrical Con-
trol Valve)

HAC-149, "COMPRESSOR : ECV (Electrical Control Valve)"

Refrigerant pressure sensor

HAC-150, "Refrigerant Pressure Sensor"

Ambient sensor

HAC-150, "Ambient Sensor"

IPDM E/R

A/C relay is integrated in IPDM E/R. IPDM E/R operates A/C relay when re-
ceiving A/C compressor request signal from ECM via CAN communication 
line.
IPDM E/R controls ECV compressor when receiving ECV control signal from 
A/C amp. via CAN communication line.
Refer to 

PCS-5, "Component Parts Location"

 for detailed installation loca-

tion.

ECM

ECM, when receiving A/C ON signal and blower fan ON signal from A/C 
amp., transmits A/C compressor request signal to IPDM E/R via CAN com-
munication according to status of the engine and refrigerant pressure.
ECM receives cooling fan request signal from A/C amp.
ECM transmits engine coolant temperature signal and refrigerant pressure 
sensor signal to A/C amp. via CAN communication line.
Refer to 

ECH-13, "Component Parts Location"

 (HR engine models), 

ECM-

25, "ENGINE CONTROL SYSTEM : Component Parts Location"

 

(MR16DDT engine models), 

ECM-627, "ENGINE CONTROL SYSTEM : 

Component Parts Location"

 (MR20DD engine models), 

ECK-12, "Compo-

nent Parts Location"

 (K9K engine models) or 

EC9-14, "Component Parts Lo-

cation"

 (R9M engine models) for detailed installation location.

Combination meter

Combination meter transmits ambient temperature signal and vehicle speed 
signal to A/C amp. via CAN communication line.

A/C control (A/C amp.)

HAC-150, "A/C Control (A/C Amp.)"

Fan control amp.

HAC-148, "A/C UNIT ASSEMBLY : Fan Control Amp."

Intake sensor

HAC-146, "A/C UNIT ASSEMBLY : Intake Sensor"

Air mix door motor

HAC-146, "A/C UNIT ASSEMBLY : Air Mix Door Motor"

Intake door motor

HAC-147, "A/C UNIT ASSEMBLY : Intake Door Motor"

Mode door motor

HAC-147, "A/C UNIT ASSEMBLY : Mode Door Motor"

Blower motor

HAC-148, "A/C UNIT ASSEMBLY : Blower Motor"

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

PTC HEATER CONTROL SYSTEM : Component Parts Location

INFOID:0000000010499399

Right side of A/C unit assembly

JMIIA3547ZZ

No.

Component

Function

Ambient sensor

HAC-150, "Ambient Sensor"

PTC relay-1/2/3

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

HAC-146

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

COMPONENT PARTS

A/C UNIT ASSEMBLY

A/C UNIT ASSEMBLY : Intake Sensor

INFOID:0000000010432486

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:0000000010432487

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.

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), 

ECM-

25, "ENGINE CONTROL SYSTEM : Component Parts Location"

 

(MR16DDT engine models), 

ECM-627, "ENGINE CONTROL SYSTEM : 

Component Parts Location"

 (MR20DD engine models), 

ECK-12, "Compo-

nent Parts Location"

 (K9K engine models) or 

EC9-14, "Component Parts Lo-

cation"

 (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-149, "A/C UNIT ASSEMBLY : PTC Heater"

Blower motor

HAC-148, "A/C UNIT ASSEMBLY : Blower Motor"

No.

Component

Function

JSIIA1630GB

COMPONENT PARTS

HAC-147

< 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:0000000010432489

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:0000000010432490

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.

JMIIA3574GB

JZIIA0033GB