Nissan Qashqai J11. Manual - part 1129

HAC-152

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

SYSTEM

sensor is used when engine coolant temperature is low [less than approximately 56

°

C (133

°

F)]. The mem-

ory data (before the ignition switch is OFF) when the engine is warmed up [approximately 56

°

C (133

°

F) or

more]. 

- The correction of the ambient temperature is not performed when the detection temperature of the ambient

temperature is less than approximately 

−

20

°

C (–4

°

F). 

Intake temperature correction

- A/C amp. inputs the temperature detected by intake sensor as the intake temperature (evaporator tempera-

ture).

- A/C amp. performs the correction of the temperature detected by intake sensor for air conditioning control. 
- A/C amp. performs the correction so that the recognition intake temperature changes depending on the dif-

ference between the detected intake temperature and the recognition intake temperature. If the difference is
large, the changing is early. The changing becomes slow as the difference becomes small. 

CONTROL BY ECM

HAC-152, "MANUAL AIR CONDITIONING SYSTEM : Compressor Control"

CONTROL BY IPDM E/R

HAC-152, "MANUAL AIR CONDITIONING SYSTEM : Compressor Control"

MANUAL AIR CONDITIONING SYSTEM : Air Inlet Control

INFOID:0000000010432505

DESCRIPTION

• A/C amp. controls the intake door motor and switches the air inlets.
• A/C amp. controls the air inlets so that they are set to fresh air intake, when compressor is stopped by low

temperature protection control.

• When the following conditions are met, A/C amp. controls the air inlets to 20% recirculation. (However, this

does not occur when high water temperature control is in effect.)
At this time, the intake switch indicator lamp turns OFF.

- Fan control dial: 21st - 24th
- Temperature control dial: Full hot
- Air outlet mode: DF ON or DEF ON

HIGH ENGINE COOLANT TEMPERATURE CONTROL

When either of the following conditions is met, A/C amp. changes the air inlets to recirculation.

Condition 1

• Air outlet: Other than D/F or DEF
• A/C switch: ON
• Ambient temperature: More than 25

°

C (77

°

F)

• Vehicle speed: 30 km/h or more
• Engine coolant temperature: 105

°

C (221

°

F) or more

Condition 2

• Air outlet: D/F or DEF
• Air inlet: Fresh air intake
• A/C switch: ON
• Ambient temperature: More than 25

°

C (77

°

F)

• Vehicle speed: 30 km/h or more
• Engine coolant temperature: 105

°

C (221

°

F) or more

MANUAL AIR CONDITIONING SYSTEM : Compressor Control

INFOID:0000000010432506

DESCRIPTION

• When the compressor activation condition is satisfied while blower motor is activated, A/C amp. transmits A/

C ON signal and blower fan ON signal to ECM.

• ECM judges the conditions of each sensor (Refrigerant pressure sensor signal, accelerator position signal,

etc.), and transmits the A/C compressor request signal to IPDM E/R via CAN communication line.

• By receiving the A/C compressor request signal from ECM, IPDM E/R turns the A/C relay to ON, and acti-

vates the compressor. Refer to 

PCS-7, "RELAY CONTROL SYSTEM : System Description"

.

CONTROL BY A/C AMP.

Low Temperature Protection Control

SYSTEM

HAC-153

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

When intake sensor detects that evaporator fin temperature is 

 [

−

5.0

°

C (23.0

°

F)] or less, A/C amp. requests ECM to turn the compres-

sor OFF, and stops the compressor.
When the air temperature returns to 

 [1.0

°

C (33.8

°

F)] or more, the

compressor is activated.

Refrigerant Discharge Amount Control

• A/C amp. transmits the ECV control signal via CAN communication. IPDM E/R transmits the control signal to

ECV according to the received ECV control signal.

• ECV is controlled according to change in the duty ratio of the transmitted control signal.
• Except when temperature setting is full cold or outlet is DEF, A/C amp. controls the refrigerant discharge

amount according to the required cooling capacity.

• A/C amp. increases the refrigerant discharge amount when evaporator temperature is higher than the target

temperature upper limit, and reduces the refrigerant discharge amount when evaporator temperature is at or
below the target temperature upper limit.

NOTE:
Target temperature upper limit value of evaporator can be changed using “TARGET EVAPORATOR TEMP
UPPER LIMIT SETTING” in “WORK SUPPORT” mode of CONSULT. Refer to 

HAC-191, "Setting of Target

Evaporator Temperature Upper Limit Value"

.

Compressor Oil Circulation Control

When the engine starts, A/C amp. activates the compressor for a few seconds and circulates the compressor
oil once.

CONTROL BY ECM

Compressor Protection Control at Pressure Malfunction

When the high-pressure side value that is detected by refrigerant pressure sensor is as per the following state,
ECM requests IPDM E/R to turn A/C relay OFF and stops the compressor.
• 3.12 MPa (31.82 kg/cm

2

, 452.4 psi) or more (When the engine speed is less than 1,500 rpm)

• 2.74 MPa (27.95 kg/cm

2

, 397.3 psi) or more (When the engine speed is 1,500 rpm or more)

• 0.14 MPa (1.43 kg/cm

2

, 20.3 psi) or less

Air Conditioning Cut Control

When the engine condition is high load, ECM transmit A/C relay OFF request to IPDM E/R, and stops the
compressor.

MANUAL AIR CONDITIONING SYSTEM : Door Control

INFOID:0000000010432507

SWITCH AND THEIR CONTROL FUNCTION

JMIIA2550GB

HAC-154

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

SYSTEM

*1: With rear ventilator
*2: With rear foot duct
NOTE:
The sub-defroster and side ventilator door include a permanent opening and does not fully close.

Intake door

Blower motor

Air conditioner filter

Evaporator

Heater core

PTC heater

Air mix door

Foot door

Side ventilator door

Sub defroster door

Center ventilator and defroster door

Fresh air

Recirculation air

Discharge air

Defroster

Center ventilator

Side ventilator

Rear ventilator

*1

Front foot

Rear foot

*2

JMIIA3570ZZ

SYSTEM

HAC-155

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

For Europe and Russia

Except for Europe and Russia

Switch/dial position

Door position

Mode door

Intake door

Air mix 

door

Ce

nt

e

r v

e

n

til

at

o

r a

n

d

 de

fr

ost

e

r 

do

or

S

u

b

 de

fros

te

r do

or

Si

de

 v

e

n

til

at

o

r 

do

or

Fo

ot doo

r

• MODE VENT switch
• MODE FOOT switch
• MODE DEF switch
• MAX DEF switch

MODE 
position

VENT/DEF (V/D)

—

—

VENT

Bi-level (B/L)

ALL

FOOT

DEF/FOOT (D/F)

DEF

INTAKE switch

REC

—

—

—

—

FRE

Temperature control dial

Full cold

—

Full cold – Full hot

 - 

Full hot

Switch/dial position

Door position

Mode door

Intake 

door

Air mix 

door

Ce

nt

er v

e

n

til

ato

r a

n

d

 de

fros

te

r do

or

Sub

 de

fr

ost

e

r do

or

S

ide

 v

e

n

til

ato

r do

or

Fo

ot

 do

o

r

VENT switch

—

—

B/L switch

FOOT switch

D/F switch

DEF switch