Infiniti FX35, FX50 (S51). Manual - part 1159

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-33

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

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• The control system consists of input sensors, switches, unified meter and A/C amp. (microcomputer) and

outputs. The relationship of these components is as shown in the figure below:

WITH ACCS : System Description

INFOID:0000000005246223

CONTROL OPERATION

Display Screen

The operation status of the system is displayed on the screen.

JSIIA1368GB

JMIIA0395GB

HAC-34

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

AUTOMATIC AIR CONDITIONER SYSTEM

Preset Switch

MODE Switch

The air discharge outlets is controlled with this switch.

Temperature Control Dial (Potentio Temperature Control) (Driver Side) 

The set temperature is increased or decreased with this dial.

Temperature Control Dial (Potentio Temperature Control) (Passenger Side) 

• The set temperature is increased or decreased with this dial.
• When the temperature control dial is turned, DUAL switch indicator turns ON.

AUTO Switch 

• The compressor, intake doors, air mix doors, mode 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 operator.

• When pressing AUTO switch, air inlet, air outlet, fan speed, and discharge air temperature are automatically

controlled.

Defroster (DEF) Switch

Mode doors are set to the defrost position with this switch. Also, intake doors are set to the outside air position,
and compressor turns ON.

A/C Switch

Compressor is ON or OFF with this switch.
(Pressing the A/C switch when the A/C switch is ON turns OFF the A/C switch and compressor.)

FAN Switches

The blower speed is manually controlled with this switch. Seven speeds are available for manual control (as
shown on the display screen).

OFF Switch

Compressor and blower are OFF, air inlet is set to FRE, and mode position is set to foot position.

Rear Window Defogger Switch

When indicator is ON, rear window is defogged.

Intake Switch

• When AUTO switch is pressed, AUTO INTAKE indicator and REC indicator turns ON, and air inlet is auto-

matic control.

• When intake switch is pressed, AUTO INTAKE indicator and REC indicator turns OFF, and air inlet is fixed to

FRE.

• When intake switch is pressed again, REC indicator turns ON, and air inlet is fixed to REC.
• Then auto intake mode is entered, inlet status is displayed by REC indicator even during automatic con-

trolled.

• When REC indicator is turned OFF, shifting mode position to D/F or DEF or when compressor is turned from

ON to OFF, intake mode position is fixed to FRE mode. REC mode can be re-entered by pressing intake
switch again, and then compressor is turned ON. (Except D/F or DEF position)

JSIIA1136GB

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-35

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

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DUAL Switch

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

independently.

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

sides.

DISCHARGE AIR FLOW

JSIIA1346GB

HAC-36

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

AUTOMATIC AIR CONDITIONER SYSTEM

SWITCHES AND THEIR CONTROL FUNCTION

AIR CONDITIONER LAN CONTROL SYSTEM

The LAN (Local Area Network) system consists of unified meter and A/C amp., mode door motor, air mix door
motors and intake door motor.

JSIIA1112GB

JSIIA1344GB