Nissan Qashqai J11. Manual - part 1152

HAC-244

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

SYSTEM

SYSTEM

MANUAL HEATER SYSTEM

MANUAL HEATER SYSTEM : System Description

INFOID:0000000010433405

SYSTEM DIAGRAM

DESCRIPTION

• Manual heater system is controlled by each function of A/C amp.and ECM.
• Each operation of heater system can be controlled by heater control (built-in A/C amp.).

CONTROL BY A/C AMP.

•

HAC-244, "MANUAL HEATER SYSTEM : Air Inlet Control"

•

HAC-245, "MANUAL HEATER SYSTEM : Door Control"

•

HAC-247, "MANUAL HEATER SYSTEM : Door Motor Starting Position Reset Control"

• Correction for input value

Ambient temperature correction

- A/C amp. inputs the temperature detected by ambient sensor as the ambient temperature. 
- A/C amp. performs the correction of the temperature detected by ambient sensor for air conditioning control. 
- A/C amp. selects and uses the initial value of ambient temperature data depending on the engine coolant

temperature when turning the ignition switch from OFF to ON. The detection temperature of the ambient
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). 

MANUAL HEATER SYSTEM : Air Inlet Control

INFOID:0000000010433409

DESCRIPTION

• A/C amp. controls the intake door motor and switches the air inlets.
• 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.

JMIIA3579GB

SYSTEM

HAC-245

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

- Fan control dial: 21th - 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
• 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
• 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 HEATER SYSTEM : Door Control

INFOID:0000000010433411

SWITCH AND THEIR CONTROL FUNCTION

Intake door

Blower motor

Air conditioner filter

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

JMIIA3580ZZ

HAC-246

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

SYSTEM

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

*: Air inlet status is displayed by indicator during activating automatic control

AIR DISTRIBUTION

Without rear ventilator, without rear foot

Defroster

Center ventilator

Side ventilator

Rear ventilator

*1

Front foot

Rear foot

*2

Switch/dial position

Door position

Mode door

Intake door

Air mix 

door

Cen

te

r ve

nt

ila

to

r an

d d

e

fr

os

ter 

do

or

Su

b d

e

fr

os

te

r do

or

Si

de

 ve

nt

ila

tor 

do

or

Fo

ot do

or

MODE VENT switch

VENT

—

—

MODE B/L switch

Bi-level (B/L)

MODE FOOT switch

FOOT

MODE D/F switch

DEF/FOOT (D/F)

MODE DEF switch

DEF

INTAKE switch

—

—

—

—

Temperature control dial

Full cold

—

Full cold – Full hot

 - 

Full hot

Discharge air flow

MODE position

Air outlet/distribution

Ventilator

Front foot

Defroster

Center

Side

V/D

40%

35%

—

25%

VENT

54%

46%

—

—

B/L

31%

40%

29%

—

ALL

21%

34%

31%

14%

FOOT

—

10%

58%

32%

D/F

—

9%

43%

48%

DEF

—

10%

—

90%

SYSTEM

HAC-247

< SYSTEM DESCRIPTION >

[MANUAL HEATER ]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

Without rear ventilator, with rear foot

MANUAL HEATER SYSTEM : Door Motor Starting Position Reset Control

INFOID:0000000010519453

• Step motors are used for the mode door motor air mix door motor, and intake door motor.
• Because the step motors do not have position detection mechanisms, there may be a deviation between the

door position recognized by A/C amp. and the actual door position.
Therefore, A/C amp. performs motor zero position reset for aligning its recognized door position with the
actual door position.

• The reset signal is transmitted from A/C amp. to the air mix door motor, mode door motor, and intake door

motor, which then perform zero position reset.

• After any of the following conditions is met, A/C amp. performs motor zero position reset when the ignition

switch is next turned ON.

- The ignition switch is turned from ON to OFF a total of 360 times.
- The ignition switch turns OFF while the mode door motor, air mix door motor, or intake door motor is operat-

ing.

• If A/C amp., air mix door motor, mode door motor, or intake door motor is removed, it is necessary to perform

motor zero position reset using CONSULT.

PTC HEATER CONTROL SYSTEM

PTC HEATER CONTROL SYSTEM : System Description

INFOID:0000000010502942

SYSTEM DIAGRAM

DESCRIPTION

• BCM performs PTC relay ON/OFF control based on engine speed, engine coolant temperature, electrical

power cut freeze signal (permission signal, retention signal, stop signal), blower motor operation state sig-
nal, front window defogger state signal, ambient temperature signal, battery voltage, and electrical load state
(high beam request, low beam request, and others).

Discharge air flow

MODE position

Air outlet/distribution

Ventilator

Foot

Defroster

Center

Side

Front

Rear

V/D

40%

35%

—

—

25%

VENT

54%

46%

—

—

—

B/L

33%

40%

16%

11%

—

ALL

22%

35%

16%

11%

16%

FOOT

—

11%

32%

25%

32%

D/F

—

8%

24%

19%

49%

DEF

—

10%

—

—

90%

JMIIA3583GB