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Nissan Pathfinder (2008 year). Manual - part 433

HAC-8

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

FUNCTION INFORMATION

FUNCTION DIAGNOSIS

FUNCTION INFORMATION

Component Part Location

INFOID:0000000001366685

ENGINE COMPARTMENT

VQ40DE

WJIA2270E

Heater pump relay E144

Refrigerant pressure sensor E48
(View with battery removed)

⇐

: Front

Ambient sensor E1 (View with grille
removed)

A/C Compressor F3

Heater pump E141

FUNCTION INFORMATION

HAC-9

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HAC

VK56DE

PASSENGER COMPARTMENT

AWIIA0220ZZ

Refrigerant pressure sensor E48
(View with battery removed)

⇐

: Front

Ambient sensorE1 (View with grille
removed)

A/C Compressor F3

Water valve F68

HAC-10

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

FUNCTION INFORMATION

A/C Auto amp. M49, M50

In-vehicle sensor M32

Intake sensor M146

Intake door motor M58

Variable blower control (front)
M122

Air mix door motor (driver) M147

Mode door motor (front) M142

Air mix door motor (passenger)
M143

Optical sensor M145

⇐

:Front

⇐

AWIIA0221ZZ

FUNCTION INFORMATION

HAC-11

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HAC

REAR PASSENGER COMPARTMENT

Symptom Table

INFOID:0000000001366686

Rear air control (front) R2

Air mix door motor (rear) B155

Rear blower motor B501

Variable blower control (rear) B133

Rear air control (rear) M208

AWIIA0222ZZ

Symptom

Reference Page

A/C system does not come on.

Go to Trouble Diagnosis Procedure for A/C System.

HAC-87

A/C system display is malfunctioning (with
NAVI).

Go to Navigation System.

AV-337

A/C system display is malfunctioning (without
NAVI).

Go to Mid-level Audio System.

AV-179

A/C system cannot be controlled.

Go to Self-diagnosis Function.

HAC-23

Air outlet does not change.

Go to Trouble Diagnosis Procedure for Mode Door Motor.

HAC-27

Mode door motor is malfunctioning.

Discharge air temperature does not change.

Go to Trouble Diagnosis Procedure for Air Mix Door Motor.

HAC-32

Air mix door motor is malfunctioning.

HAC-12

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

FUNCTION INFORMATION

Intake door does not change.

Go to Trouble Diagnosis Procedure for Intake Door Motor.

HAC-43

Intake door motor is malfunctioning.

Front blower motor operation is malfunction-
ing.

Go to Trouble Diagnosis Procedure for Front Blower Motor.

HAC-47

Rear blower motor operation is malfunction-
ing.

Go to Trouble Diagnosis Procedure for Rear Blower Motor.

HAC-52

Rear discharge air temperature and/or air
outlet does not change.

Go to Trouble Diagnosis Procedure for Rear Air Control circuit.

HAC-61

Magnet clutch does not engage.

Go to Trouble Diagnosis Procedure for Magnet Clutch.

HAC-68

Insufficient cooling

Go to Trouble Diagnosis Procedure for Insufficient Cooling.

HAC-107

Insufficient heating

Go to Trouble Diagnosis Procedure for Insufficient Heating.

HAC-115

Noise

Go to Trouble Diagnosis Procedure for Noise.

HAC-117

Self-diagnosis cannot be performed.

Go to Trouble Diagnosis Procedure for Self-diagnosis.

HAC-87

Memory function does not operate.

Go to Trouble Diagnosis Procedure for Memory Function.

HAC-119

Symptom

Reference Page

REFRIGERATION SYSTEM

HAC-13

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HAC

REFRIGERATION SYSTEM

Refrigerant Cycle

INFOID:0000000001366687

Refer to

HAC-13, "Refrigerant Cycle"

Refrigerant System Protection

INFOID:0000000001366688

Refer to

HAC-13, "Refrigerant System Protection"

HAC-14

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

AUTOMATIC AIR CONDITIONER SYSTEM

AUTOMATIC AIR CONDITIONER SYSTEM

Control System Diagram

INFOID:0000000001366689

CONTROL SYSTEM

The control system consists of input sensors, switches, the A/C auto amp. (microcomputer) and outputs.
The relationship of these components is shown in the figure below:

Control System Description

INFOID:0000000001366690

CONTROL OPERATION

AWIIA0223GB

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-15

< FUNCTION DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

HAC

A/C Auto Amp.

DISPLAY SCREEN

Displays the operational status of the system.

AUTO SWITCH

• Pressing the AUTO switch will illuminate the LED and "Auto" will be visible on the display. The A/C indicator

will illuminate.

• The A/C 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 automati-

cally controlled.

• A partial AUTO mode can be achieved by only changing the blower speed or by changing the mode position.

If both the blower speed and the mode positions are changed, the AUTO mode will be cancelled.

TEMPERATURE CONTROL DIAL (DRIVER)

Increases or decreases the set temperature.

TEMPERATURE CONTROL DIAL (PASSENGER)

Increases or decreases the set temperature.

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,
and turns A/C compressor ON.

REAR WINDOW DEFOGGER SWITCH

When switch is ON, rear window and door mirrors are defogged.

OFF SWITCH

The A/C 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

Controls the air discharge outlets.

AWIIA0081ZZ

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