2006 INFINITI QX56 Factory Service Manual

USB port maintenance fuel tank capacity jump cable seat adjustment key

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INFINITI QX56 2006 Factory Service Manual ATC-24
OIL
Revision: November 20092006 QX56
CAUTION:
Do not add this 5 m (0.2 US fl oz, 0.2 Imp fl oz) of oil if only replacing the compressor.

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INFINITI QX56 2006 Factory Service Manual AIR CONDITIONER CONTROLATC-25
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AIR CONDITIONER CONTROLPFP:27500
DescriptionEJS003X5
The front air control provides automatic regulation of

AIR CONDITIONER CONTROLATC-25
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AIR CONDITIONER CONTROLPFP:27500
DescriptionEJS003X5
The front air control provides automatic regulation of the vehicle's interior temperature. The system is based
on the driver's and passenger's selected "set temperature", regardless of the outside temperature changes.
This is done by utilizing a microcomputer, also referred to as the front air control, which receives input signals
from the following seven sensors:
Ambient sensor
In-vehicle sensor
Intake sensor
Optical sensor (providing one input for driver and one input for passenger side)
PBR (Position Balanced Resistor)
Vehicle speed sensor (via CAN communication)
Engine coolant temperature (via CAN communication)
The front air control uses these signals (including the set temperature) to automatically control:
Outlet air volume
Air temperature
Air distribution
The front air control also provides separate regulation of the vehicle's interior temperature for the rear passen-
ger area. The system is based on the temperature and rear blower settings selected from rear control
switches located on the front air control, or from the temperature and rear blower settings selected from rear
control switches on the rear air control, when the front air control switches are set to the rear position.
The front air control is used to select:
Outlet air volume
Air temperature/distribution
OperationEJS003X6
AIR MIX DOORS CONTROL
The air mix doors are automatically controlled so that in-vehicle temperature is maintained at a predetermined
value by the temperature setting, ambient temperature, in-vehicle temperature and amount of sunload.
BLOWER SPEED CONTROL
Blower speed is automatically controlled by the temperature setting, ambient temperature, in-vehicle tempera-
ture, intake temperature, amount of sunload and air mix door position.
When AUTO switch is pressed, the blower motor starts to gradually increase air flow volume (if required).
When engine coolant temperature is low, the blower motor operation is delayed to prevent cool air from flow-
ing.
INTAKE DOOR CONTROL
The intake door is automatically controlled by the temperature setting, ambient temperature, in-vehicle tem-
perature, intake temperature, amount of sunload and by the ON-OFF operation of the compressor.
MODE DOOR CONTROL
The mode door is automatically controlled by the temperature setting, ambient temperature, in-vehicle temper-
ature, intake temperature and amount of sunload.
DEFROSTER DOOR CONTROL
The defroster door is controlled by: Turning the defroster dial to front defroster.

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INFINITI QX56 2006 Factory Service Manual ATC-26
AIR CONDITIONER CONTROL
Revision: November 20092006 QX56
MAGNET CLUTCH CONTROL
When A/C switch or DEF switch is pressed, front air control inputs compressor ON signal to BCM.
BCM sends compress

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INFINITI QX56 2006 Factory Service Manual AIR CONDITIONER CONTROLATC-27
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Description of Control SystemEJS003X7
The control system consists of input sensors, switches, the front air

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INFINITI QX56 2006 Factory Service Manual ATC-28
AIR CONDITIONER CONTROL
Revision: November 20092006 QX56
DISPLAY SCREEN
Displays the operational status of the system.
AUTO SWITCH
The compressor, intake door, air mix doors, outlet doors and

ATC-28
AIR CONDITIONER CONTROL
Revision: November 20092006 QX56
DISPLAY SCREEN
Displays the operational status of the system.
AUTO SWITCH
The compressor, intake door, air mix doors, outlet doors and blower speed are automatically controlled so
that the in-vehicle temperature will reach, and be maintained at the set temperature selected by the oper-
ator.
When pressing AUTO switch, air inlet, air outlet, blower speed, and discharge air temperature are auto-
matically controlled.
TEMPERATURE CONTROL DIAL (TEMPERATURE CONTROL) (DRIVER SIDE)
Increases or decreases the set temperature.
TEMPERATURE CONTROL DIAL (TEMPERATURE CONTROL) (PASSENGER SIDE)
Increases or decreases the set temperature.
TEMPERATURE CONTROL DIAL (TEMPERATURE AND MODE CONTROL) (REAR)
Increases or decreases the set temperature. The mode also changes from foot at full hot setting, to foot/vent
mid-range (warm) setting, and then to panel on full cold setting.
RECIRCULATION () SWITCH
When REC switch is ON, REC switch indicator turns ON, and air inlet is set to REC.
When REC switch is turned OFF, or when compressor is turned from ON to OFF, REC switch is automati-
cally turned OFF. REC mode can be re-entered by pressing REC switch again.
REC switch is not operated when DEF switch is turned ON, at the D/F position or in floor position.
DEFROSTER () SWITCH
Positions the air outlet doors to the defrost position. Also positions the intake doors to the outside air position.
REAR WINDOW DEFOGGER SWITCH
When switch is ON, rear window and door mirrors are defogged.
OFF SWITCH
The compressor and blower are OFF, the intake doors are set to the outside air position, and the air outlet
doors are set to the foot (75% foot and 25% defrost) position.
A/C SWITCH
The compressor is ON or OFF.
(Pressing the A/C switch when the AUTO switch is ON will turn off the A/C switch and compressor.)
MODE SWITCH (FRONT)
Controls the air discharge outlets.
FRONT BLOWER CONTROL DIAL
Manually control the blower speed. Seven speeds are available for manual control (as shown on the display
screen).

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INFINITI QX56 2006 Factory Service Manual AIR CONDITIONER CONTROLATC-29
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Rear Air Control
TEMPERATURE CONTROL DIAL (TEMPERATURE AND MODE CONTROL)
The temperature increases or decrea

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INFINITI QX56 2006 Factory Service Manual ATC-30
AIR CONDITIONER CONTROL
Revision: November 20092006 QX56
Discharge Air FlowEJS003X9
FRONT
REAR
WJIA0540E
WJIA0528E
WJIA0541E
WJIA1236E

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INFINITI QX56 2006 Factory Service Manual AIR CONDITIONER CONTROLATC-31
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System Description (Front)EJS003XA
SWITCHES AND THEIR CONTROL FUNCTION
WJIA1680E
WJIA1237E

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