Nissan Pathfinder. Manual — part 692

SYSTEM

HAC-29

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

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When mode door motor (rear) is activated while air flow is more than the specified value, A/C auto amp.

reduces temporarily fan speed so that mode door (rear) moves smoothly.

REAR AUTOMATIC AIR CONDITIONING SYSTEM : Air Outlet Control

INFOID:0000000009176795

• While air outlet is in automatic control, A/C auto amp. selects the

mode door (rear) position depending on a target air mix door (rear)

angle and outlet air temperature calculated from sunload.

REAR AUTOMATIC AIR CONDITIONING SYSTEM : Door Control

INFOID:0000000009176796

DOOR MOTOR CONTROL

• LCU (Local Control Unit) is built in to each door motor, and detects door position by PBR (Potentio Balance

Resistor).

• A/C auto amp. communicates with each LCU via communication line and receives each door position feed

back signal from each LCU.

• Each LCU controls each door to the appropriate position depending on the control signal from A/C auto amp.

when the door movement is complete, transmits the signal of door movement completion to A/C auto amp.

SWITCHES AND THEIR CONTROL FUNCTION

JMIIA0733GB

ALIIA0553GB

HAC-30

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

SYSTEM

AIR DISTRIBUTION

REAR AUTOMATIC AIR CONDITIONING SYSTEM : Temperature Control

INFOID:0000000009176797

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

automatically controls temperature regardless of rear air condition-

ing operational state.

• A/C auto amp. calculates the target air mix door (rear) opening

angle depending on set temperature, ambient temperature, and

sunload.

• Air mix door (rear) is controlled depending on the comparison of

current air mix door (rear) opening angle and target air mix door

(front) opening angle.

• Regardless of ambient temperature, and sunload, air mix door

(rear) is fixed at the fully cold position when set temperature is

18.0

°C (60°F), and at the fully hot position when set temperature is

32.0

°C (90°F).

1.

Rear shut-off door

2.

Rear blower motor 1

3.

Mode door (rear)

4.

PTC heater
Recirculation air

Rear ventilator

Rear A/C foot

Switch/Dial position

Door position

Mode door (rear)

Rear shut-off door

AUTO switch

Front A/C control

AUTO

B

Rear air control

VENT

C

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FOOT

D

—

OFF switch

AUTO

A

ALIIA0556ZZ

Discharge air flow

Mode position

Air outlet/distribution

VENT

FOOT

100%

—

—

100%

JMIIA0734GB

OPERATION

HAC-31

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

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OPERATION

FRONT AUTOMATIC AIR CONDITIONING SYSTEM
FRONT AUTOMATIC AIR CONDITIONING SYSTEM : Switch Name and Function

INFOID:0000000009176798

FRONT AIR CONTROLLER OPERATION (WITH BASE AUDIO SYSTEM)

A/C Display

Front air conditioning system state is indicated on the display.

Display Screen

Controller (A/C switch assembly)

Switch Operation

ALIIA0691ZZ

1.

DEF switch

2.

AUTO switch

3.

Temperature control (Driver side)

4.

A/C switch

5.

Fan switch

6.

DUAL switch

7.

Temperature control (passenger
side)

8.

MODE switch

9.

Intake switch

10. ON/OFF switch

ALIIA0688ZZ

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.

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

HAC-32

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

OPERATION

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

Blower fan speed is manually controlled with this switch.
NOTE:
• When fan switch is operated 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 operated 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).

ON/OFF switch

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

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).