Infiniti QX56 (Z62). Manual - part 782

SYSTEM

HAC-19

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

*: Inlet status is displayed by indicator when activating automatic control

Without ACCS (Advanced Climate Control System)

1.

Intake door

2.

In-cabin microfilter

3.

Blower motor

4.

Evaporator

5.

Air mix door (Driver side/Passenger 
side)

6.

Heater core

7.

Foot door

8.

Ventilator door

9.

Upper ventilator door

10. Defroster door

Fresh air intake

Recirculation air

Center ventilator

Side ventilator

Upper ventilator

Foot

Rear foot

Defroster

Switch/Dial position

Door position

Ventilator

door

Foot
door

Defroster

door

Intake

door

Upper 

ventilator

door

Air mix

door

(Driver 

side)

Air mix

door

(Passen-

ger

 side)

AUTO switch

AUTO

—

AUTO

MODE 

switch

VENT

H

E

N

—

B/L

I

F

N

—

FOOT

J

G

O

—

D/F

J

G

O

B

—

DEF switch

J

E

P

B

K

—

Intake switch

*

FRE

—

B

—

REC

—

A

—

Upper ventila-

tor switch

ON

—

L – M

—

OFF

—

K

—

Temperature 

control dial 

(Driver side)

DUAL 
switch: 
OFF

18.0

°

C (60

°

F)

—

C

18.5

°

C (61

°

F) 

⇔

 

31.5

°

C (89

°

F)

—

AUTO

32.0

°

C (90

°

F)

—

D

Temperature 

control dial 

(Driver side)

DUAL 
switch: 
ON

18.0

°

C (60

°

F)

—

C

—

18.5

°

C (61

°

F) 

⇔

 

31.5

°

C (89

°

F)

—

AUTO

—

32.0

°

C (90

°

F)

—

D

—

Temperature 

control dial 

(Passenger 

side)

18.0

°

C (60

°

F)

—

C

18.5

°

C (61

°

F) 

⇔

 

31.5

°

C (89

°

F)

—

AUTO

32.0

°

C (90

°

F)

—

D

OFF switch

AUTO

—

HAC-20

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

SYSTEM

1.

Intake door

2.

In-cabin microfilter

3.

Blower motor

4.

Evaporator

5.

Air mix door (Driver side/Passenger 
side)

6.

Heater core

7.

Foot door

8.

Ventilator door

9.

Upper ventilator door

10. Defroster door

Fresh air intake

Recirculation air

Center ventilator

Side ventilator

Upper ventilator

Foot

Rear foot

Defroster

JMIIA0727ZZ

Switch/Dial position

Door position

Ventilator

door

Foot
door

Defroster

door

Intake

door

Upper 

ventilator

door

Air mix

door

(Driver 

side)

Air mix

door

(Passen-

ger

 side)

AUTO switch

AUTO

—

AUTO

MODE 

switch

VENT

H

E

N

—

B/L

I

F

N

—

FOOT

J

G

O

—

D/F

J

G

O

B

—

DEF  switch

J

E

P

B

K

—

FRE switch

*

—

B

—

REC switch

*

—

A

—

Upper ventila-

tor switch

ON

—

L – M

—

OFF

—

K

—

SYSTEM

HAC-21

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

*: Inlet status is displayed by indicator when activating automatic control

AIR DISTRIBUTION

FRONT AUTOMATIC AIR CONDITIONING SYSTEM : Temperature Control

INFOID:0000000006275867

• When ignition switch is in the ON position, A/C auto amp. always

automatically controls temperature regardless of front air condi-
tioning operational state.

• A/C auto amp. calculates the target front air mix door opening

angle depending on set temperature, in-vehicle temperature (front
side), ambient temperature, and sunload.

• 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 in-vehicle temperature (front side), ambient temper-

ature, and sunload, front air mix door is fixed at the fully cold posi-
tion when set temperature is 18.0

°

C (60

°

F), and at the fully hot

position when set temperature is 32.0

°

C (90

°

F).

FRONT AUTOMATIC AIR CONDITIONING SYSTEM : Fail-safe

INFOID:0000000006275868

FAIL-SAFE FUNCTION

Temperature 

control dial 

(Driver side)

DUAL 
switch: 
OFF

18.0

°

C (60

°

F)

—

C

18.5

°

C (61

°

F) 

⇔

 

31.5

°

C (89

°

F)

—

AUTO

32.0

°

C (90

°

F)

—

D

Temperature 

control dial 

(Driver side)

DUAL 
switch: 
ON

18.0

°

C (60

°

F)

—

C

—

18.5

°

C (61

°

F) 

⇔

 

31.5

°

C (89

°

F)

—

AUTO

—

32.0

°

C (90

°

F)

—

D

—

Temperature 

control dial 

(Passenger 

side)

18.0

°

C (60

°

F)

—

C

18.5

°

C (61

°

F) 

⇔

 

31.5

°

C (89

°

F)

—

AUTO

32.0

°

C (90

°

F)

—

D

OFF switch

AUTO

—

Switch/Dial position

Door position

Ventilator

door

Foot
door

Defroster

door

Intake

door

Upper 

ventilator

door

Air mix

door

(Driver 

side)

Air mix

door

(Passen-

ger

 side)

Discharge air flow

Mode position

Condition

Air outlet/distribution

VENT

FOOT

DEF

Center

Side

Front

Rear

DUAL and Up-
per ventilator 
switch: OFF

50%

50%

—

—

—

30%

30%

26%

14%

—

—

14%

36%

23%

27%

—

12%

32%

20%

36%

—

11%

—

—

89%

JMIIA0731GB

HAC-22

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

SYSTEM

If a communication error exists between the A/C auto amp., and the AV control unit and preset switch for 30
seconds or longer, air conditioning is controlled under the following conditions:

When ambient temperature is less than 3

°

C (37

°

F) and engine coolant temperature is less than 56

°

C (133

°

F)

When ambient temperature is 3

°

C (37

°

F) or more, or engine coolant temperature is 56

°

C (133

°

F) or more

REAR AUTOMATIC AIR CONDITIONING SYSTEM

Compressor

: ON

Air outlet

: DEF

Air inlet

: FRE (Fresh air intake)

Blower fan speed

: AUTO

Set temperature

: Setting before communication error occurs

Compressor

: ON

Air outlet

: AUTO

Air inlet

: 20% FRE (20% fresh air intake)

Blower fan speed

: AUTO

Set temperature

: Setting before communication error occurs