Nissan Sentra. Manual - part 569

HAC-124

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONER]

SYSTEM

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

MODE DOOR MOTOR

DESCRIPTION

• The step motor system is adopted for mode door motor.

• When a drive signal is input from A/C auto 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.

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.

INTAKE DOOR MOTOR

• Motor operates intake door according to control signal from A/C auto amp.

• Rotation of motor is transmitted to intake door by lever, then air inlet is switched.

SWITCHES AND THEIR CONTROL FUNCTION

JSIIA1655GB

JZIIA0033GB

SYSTEM

HAC-125

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONER]

C

D

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F

G

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Intake door

Blower motor

Air conditioner filter

Evaporator

Upper air mix door (driver side/pas-
senger side)

Lower air mix door (driver side/pas-
senger side)

Heater core

Foot door

Side ventilator door

Sub defroster door

Center ventilator and defroster door

Fresh air intake

Recirculation air

Discharge air

Defroster

Center ventilator

Side ventilator

Rear ventilator

Front foot

Rear foot

JMIIA1958ZZ

HAC-126

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONER]

SYSTEM

AIR DISTRIBUTION

Temperature Control

INFOID:0000000009757731

• When the ignition switch is in the ON position, the customer uses the front air control temperature control

dial to set the desired temperature. 

• The front air control calculates the target front air mix door opening angle depending on the selected temper-

ature, intake temperature sensor, engine coolant temperature and rpm, and ambient temperature.

• Front air mix door is controlled depending on the comparison of current front air mix door opening angle and

target front air mix door opening angle.

• Regardless of ambient temperature, the front air mix door is fixed at the fully cold position when the temper-

ature control dial is set at the full cold position and fixed at the fully hot position when the temperature control

dial is set at the full hot position.

Switch position

Door position

Mode door

In

ta

ke

 do

or

Air mix door

Ce

nt

er

 v

en

til

at

or

 a

nd

 de

fr

ost

er 

do

or

S

ub

 de

fros

te

r do

or

Si

de

 v

en

til

at

or

 do

or

Fo

ot doo

r

Up

pe

r a

ir m

ix

 do

or

Lo

wer ai

r mi

x d

o

or

MODE switch

—

—

—

DEF switch

REC switch

—

—

—

—

FRE switch

Temperature control switch

Full cold

18

°C

—

Full hot

32

°C

ON·OFF switch

OFF

—

—

Discharge air flow

MODE/DEF set-

ting position

Air outlet/distribution

Ventilator

Foot

Defroster

Front

Rear

Front

Rear

Center

Side

48.7%

37.4%

13.9%

—

—

—

26.6%

25.6%

13.2%

23.6%

11.0%

—

—

15.6%

16.9%

32.9%

16.3%

18.3%

—

13.4%

15.1%

27.0%

14.3%

30.2%

—

17.5%

18.8%

—

—

63.7%

OPERATION

HAC-127

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONER]

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OPERATION

Switch Name and Function

INFOID:0000000009757732

A/C Switch Assembly

Switch Operation

1.

A/C switch

2.

Blower control dial (with OFF switch) 3.

DEF switch

4.

Rear DEF switch

5.

REC switch

6.

Temperature control dial

7.

MAX A/C switch

8.

D/F switch

9.

FOOT switch

10. B/L switch

11. VENT switch

ALIIA0604ZZ

A/C switch

Switches the compressor control switch indicator between ON 

⇔ OFF with each press while front 

blower fan is activated. The circuit used by the BCM to detect an A/C ON request is grounded.
NOTE:
When front blower fan is OFF, the compressor control cannot be activated.

Blower control dial (with 
OFF switch)

• Blower fan speed is manually controlled with the dial for varying blower speed. When ON, the circuit 

used by the BCM to detect a fan ON request signal is grounded.

• Turns air conditioning system OFF.
NOTE:
When blower control dial is turned to any ON position the air conditioning system is activated. (Com-
pressor control state returns to the previous state before air conditioning system was turned OFF.)

DEF switch

Switches DEF mode (switch indicator) between ON 

⇔ OFF with each press.

• When DEF mode is turned ON, the air conditioning system changes to the following state.
- Air inlet: Fresh air intake
- Air outlet: DEF
- Blower fan: Manual setting.
- Compressor: ON
• When DEF mode is turned OFF, the air conditioning system state returns to the previous state be-

fore DEF mode was selected, but the following state is continued:

- Air inlet: Fresh air intake
- Compressor: ON
NOTE:
When front blower fan is OFF, DEF cannot be activated.