Infiniti QX56 (Z62). Manual - part 785

OPERATION

HAC-31

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

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HAC

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AUTO switch

Turns the switch indicator lamp and "AUTO" indicator on the display ON, and then front air condition-
ing system becomes the following state.
• Air inlet: Automatic control
• Air outlet: Automatic control
• Blower fan: Automatic control
• Compressor: ON

A/C switch

Turns the compressor control (switch indicator) between ON 

⇔

 OFF each time while front blower fan 

is activated.
NOTE:
• When front blower fan is OFF, the compressor control cannot be activated.
• When the compressor control (switch indicator) is in the OFF position, air inlet is fresh air intake 

(FRE).

Defroster (DEF) switch

Turns DEF mode (switch indicator) between ON 

⇔

 OFF each time.

When DEF switch is pressed while front air conditioning system is in the ON position.

• When DEF mode is turned ON, front air conditioning system becomes the following state.
- Air inlet: Fresh air intake
- Air outlet: DEF
- Blower fan: Automatic control (If fan speed other than AUTO is selected before pressing DEF 

switch, fan speed is manual control.)

- Compressor: ON
• When DEF mode is turned OFF, front air conditioning system state returns to the previous state 

before DEF mode is selected. But, the following state is continued.

- Air inlet: Fresh air intake
- Compressor: ON

When DEF switch is pressed while front air conditioning system is in the OFF position.

• When DEF mode is turned ON, front air conditioning system becomes the following state.
- Air inlet: Fresh air intake
- Air outlet: DEF
- Blower fan: Automatic control
- Compressor: ON
• When DEF mode is turned OFF, entire front air conditioning system is set to auto mode.
NOTE:
When DEF mode turns ON while front air conditioning system is in automatic control (“AUTO” is indi-
cated), automatic control is released (“AUTO” turns OFF).

DUAL switch

• Turns left and right ventilation temperature separately control (switch indicator) between ON 

⇔

 

OFF each time.

• When DUAL switch indicator is ON, the driver side and passenger side temperatures can each be 

set independently.

• When DUAL switch indicator is OFF, the driver side outlet and setting temperature is applied to both 

sides.

• Left and right ventilation temperature separately control is cancelled by turning the DEF mode ON.
NOTE:
When front air conditioning system is in the OFF position, left and right ventilation temperature sepa-
rately control can be selected only while front air conditioning system state (when MODE switch is 
pressed) is indicated on the display.

Fan switch (UP/DOWN)

Blower fan speed is manually controlled with these switches. Seven speeds are available for manual 
control (as shown on the display screen)
NOTE:
• When fan switch is pressed while front air conditioning system is in OFF, front air conditioning sys-

tem is activated. (Compressor control state returns to the previous state before front air condition-
ing system OFF.)

• When fan switch is pressed while front air conditioning system is in automatic control (“AUTO” is 

indicated), automatic control is released (“AUTO” turns OFF).

MODE switch

Selects air outlet sequentially from VENT 

⇒

 B/L 

⇒

 FOOT 

⇒

 D/F 

⇒

 VENT each time.

NOTE:
• When front air conditioning system is in the OFF position, air outlet can be selected. 
• When MODE switch is pressed while front air conditioning system is in automatic control (“AUTO” 

is indicated), automatic control is released (“AUTO” turns OFF).

OFF switch

• Turns front air conditioning system OFF.
• When front air conditioning system turns OFF, air inlet and air outlet become the automatic control.

HAC-32

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

OPERATION

WITHOUT ACCS (ADVANCED CLIMATE CONTROL SYSTEM)

A/C Display

• Front air conditioning system state is indicated on the display.
• When “STATUS” on multifunction switch is pressed while front air conditioning system is in the ON position,

the display changes to state indication display of front air conditioning system. When front air conditioning
system is operated while navigation system or audio system is displayed, front air conditioning system state
is indicated in the lower portion of display for several seconds.

• When MODE switch is pressed while front air conditioning system is in the OFF position, state indication dis-

play is indicated for several seconds.

Display Screen

Controller (Preset Switch)

Intake switch

Air inlet changes between recirculation (REC) 

⇔

 fresh air intake (FRE) each time this switch is 

pressed.
• Intake switch indicator ON: Recirculation
• Intake switch indicator OFF: Fresh air intake
NOTE:
• When front air conditioning system is in the OFF position, air inlet can be selected.
• When MODE switch and DEF switch is in the D/F or DEF position, air inlet cannot be selected to 

recirculation (REC).

Temperature control dial 
(driver side)

• Selects set temperature within a range between 18.0

°

C (60

°

F) – 32.0

°

C (90

°

F) at a rate of 0.5

°

C 

(1.0

°

F) each time the dial is rotated.

- Clockwise rotation: Set temperature increases.
- Counterclockwise rotation: Set temperature decreases.
NOTE:
When front air conditioning system is in the OFF position, set temperature can be selected only while 
front air conditioning system state (when MODE switch is pressed) is indicated on the display.

Temperature control dial 
(passenger side)

• Selects set temperature within a range between 18.0

°

C (60

°

F) – 32.0

°

C (90

°

F) at a rate of 0.5

°

C 

(1.0

°

F) each time the dial is rotated.

- Clockwise rotation: Set temperature increases.
- Counterclockwise rotation: Set temperature decreases.
• When the temperature control dial is turned, DUAL switch indicator turns ON.
NOTE:
When front air conditioning system is in the OFF position, set temperature can be selected only while 
front air conditioning system state (when MODE switch is pressed) is indicated on the display.

 Upper ventilator switch

Turns the upper ventilator control (switch indicator) between ON 

⇔

 OFF each time while front blower 

fan is activated.
NOTE:
• When front air conditioning system is in the OFF position and air outlet is DEF position, upper ven-

tilator control cannot be activated.

• When front air conditioning system is in the OFF position, upper ventilator control can be selected 

only while front air conditioning system state (when MODE switch is pressed) is indicated on the 
display.

JMIIA0719GB

OPERATION

HAC-33

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

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Switch Operation

1.

AUTO switch

2.

Temperature control dial (Driver 
side)

3.

MODE switch

4.

OFF switch

5.

A/C switch

6.

Upper ventilator switch

7.

Temperature control dial (passenger 
side)

8.

DUAL switch

9.

REC switch

10. FRE switch

11.

Fan switch

12. DEF switch

JMIIA0822ZZ

AUTO switch

Turns the switch indicator lamp and "AUTO" indicator on the display ON, and then front air condition-
ing system becomes the following state.
• Air inlet: Automatic control
• Air outlet: Automatic control
• Blower fan: Automatic control
• Compressor: ON

A/C switch

Turns the compressor control (switch indicator) between ON 

⇔

 OFF each time while front blower fan 

is activated.
NOTE:
• When front blower fan is OFF, the compressor control cannot be activated.
• When the compressor control (switch indicator) is in the OFF position, air inlet is fresh air intake 

(FRE).

Defroster (DEF) switch

Turns DEF mode (switch indicator) between ON 

⇔

 OFF each time.

When DEF switch is pressed while front air conditioning system is in the ON position.

• When DEF mode is turned ON, front air conditioning system becomes the following state.
- Air inlet: Fresh air intake
- Air outlet: DEF
- Blower fan: Automatic control (If fan speed other than AUTO is selected before pressing DEF 

switch, fan speed is manual control.)

- Compressor: ON
• When DEF mode is turned OFF, front air conditioning system state returns to the previous state 

before DEF mode is selected. But, the following state is continued.

- Air inlet: Fresh air intake
- Compressor: ON

When DEF switch is pressed while front air conditioning system is in the OFF position.

• When DEF mode is turned ON, front air conditioning system becomes the following state.
- Air inlet: Fresh air intake
- Air outlet: DEF
- Blower fan: Automatic control
- Compressor: ON
• When DEF mode is turned OFF, entire front air conditioning system is set to auto mode.
NOTE:
When DEF mode turns ON while front air conditioning system is in automatic control (“AUTO” is indi-
cated), automatic control is released (“AUTO” turns OFF).

HAC-34

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

OPERATION

DUAL switch

• Turns left and right ventilation temperature separately control (switch indicator) between ON 

⇔

 

OFF each time.

• When DUAL switch indicator is ON, the driver side and passenger side temperatures can each be 

set independently.

• When DUAL switch indicator is OFF, the driver side outlet and setting temperature is applied to both 

sides.

• Left and right ventilation temperature separately control is cancelled by turning the DEF mode ON.
NOTE:
When front air conditioning system is in the OFF position, left and right ventilation temperature sepa-
rately control can be selected only while front air conditioning system state (when MODE switch is 
pressed) is indicated on the display.

Fan switch (UP/DOWN)

Blower fan speed is manually controlled with these switches. Seven speeds are available for manual 
control (as shown on the display screen)
NOTE:
• When fan switch is pressed while front air conditioning system is in OFF, front air conditioning sys-

tem is activated. (Compressor control state returns to the previous state before front air condition-
ing system OFF.)

• When fan switch is pressed while front air conditioning system is in automatic control (“AUTO” is 

indicated), automatic control is released (“AUTO” turns OFF).

FRE switch

• Air inlet is selected to fresh air intake (FRE) by pressing this switch.
- FRE indicator: ON
- REC indicator: OFF
• When FRE indicator is ON, pressing the FRE switch for approximately 1.5 seconds or more, and 

then the FRE and REC switch indicators blink twice and the system is switched to the automatic 
control.

NOTE:
When front air conditioning system is in the OFF position, air inlet can be selected.

MODE switch

Selects air outlet sequentially from VENT 

⇒

 B/L 

⇒

 FOOT 

⇒

 D/F 

⇒

 VENT each time.

NOTE:
• When front air conditioning system is in the OFF position, air outlet can be selected. 
• When MODE switch is pressed while front air conditioning system is in automatic control (“AUTO” 

is indicated), automatic control is released (“AUTO” turns OFF).

OFF switch

• Turns front air conditioning system OFF.
• When front air conditioning system turns OFF, air inlet and air outlet become the automatic control.

REC switch

• Air inlet is selected to fresh air intake (REC) by pressing this switch.
- REC indicator: ON
- FRE indicator: OFF
• When REC indicator is ON, pressing the REC switch for approximately 1.5 seconds or more, and 

then the FRE and REC switch indicators blink twice and the system is switched to the automatic 
control.

NOTE:
• When front air conditioning system is in the OFF position, air inlet can be selected.
• When MODE switch and DEF switch is in the D/F or DEF position, air inlet cannot be selected to 

recirculation (REC).

Temperature control dial 
(driver side)

• Selects set temperature within a range between 18.0

°

C (60

°

F) – 32.0

°

C (90

°

F) at a rate of 0.5

°

C 

(1.0

°

F) each time the dial is rotated.

- Clockwise rotation: Set temperature increases.
- Counterclockwise rotation: Set temperature decreases.
NOTE:
When front air conditioning system is in the OFF position, set temperature can be selected only while 
front air conditioning system state (when MODE switch is pressed) is indicated on the display.