Nissan Pathfinder (2005 year). Manual - part 47

LUBRICANT

ATC-23

ATC

2005 Pathfinder

Measure an amount of new lubricant installed equal to amount drained from “old” compressor. Add this
lubricant to “new” compressor through the suction port opening.

Measure an amount of new lubricant equal to the amount recovered during discharging. Add this lubricant
to “new” compressor through the suction port opening.

If the liquid tank also needs to be replaced, add an additional 5 m

(0.2 US fl oz, 0.2 Imp fl oz) of lubricant

at this time.
Do not add this 5 m

(0.2 US fl oz, 0.2 Imp fl oz) of lubricant if only replacing the compressor.

RHA065DD

ATC-24

AIR CONDITIONER CONTROL

2005 Pathfinder

AIR CONDITIONER CONTROL

PFP:27500

Description

EJS003R0

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 six sensors:

●

Ambient sensor

●

In-vehicle sensor

●

Intake sensor

●

Optical sensor (one sensor for driver and passenger side)

●

PBR (Position Balanced Resistor).

●

Vehicle speed sensor

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

Operation

EJS003R1

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 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.

AIR CONDITIONER CONTROL

ATC-25

ATC

2005 Pathfinder

MAGNET CLUTCH CONTROL

When A/C switch or DEF switch is pressed, front air control inputs compressor ON signal to BCM.
BCM sends compressor ON signal to ECM, via CAN communication line.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant pressure sen-
sor signal, throttle angle sensor, etc.). If it judges compressor can be turned ON, it sends compressor ON sig-
nal to IPDM E/R, via CAN communication line.
Upon receipt of compressor ON signal from ECM, IPDM E/R turns air conditioner relay ON to operate com-
pressor.

SELF-DIAGNOSTIC SYSTEM

The self-diagnostic system is built into the front air control to quickly locate the cause of symptoms. Refer to

ATC-50, "A/C System Self-diagnosis Function"

WJIA1163E

ATC-26

AIR CONDITIONER CONTROL

2005 Pathfinder

Description of Control System

EJS003QY

The control system consists of input sensors, switches, the front air control (microcomputer) and outputs.
The relationship of these components is shown in the figure below:

Control Operation

EJS003QZ

Front air control

WJIA1279E

WJIA1038E

AIR CONDITIONER CONTROL

ATC-27

ATC

2005 Pathfinder

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 vent 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, or at the D/F position.

DEFROSTER (DEF) 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 is 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).

MODE SWITCH (REAR)

Controls the air/temperature at discharge outlets.

ATC-28

AIR CONDITIONER CONTROL

2005 Pathfinder

Rear Air Control

TEMPERATURE CONTROL DIAL (TEMPERATURE AND MODE CONTROL)

The temperature increases or decreases the set temperature. The mode also changes from foot at full hot set-
ting, to foot/vent at mid-range (warm) setting, and then to vent at full cold setting.

REAR BLOWER CONTROL DIAL

When the rear blower switch (front) is in the OFF position, the rear blower motor cannot operate.
When the rear blower switch (front) is in the REAR position, it allows the rear blower switch (rear) to control
the rear blower motor speed. In any other position (1-4), the rear blower switch (front) controls the rear blower
motor speed regardless of the rear blower switch (rear) position.

WJIA1042E

AIR CONDITIONER CONTROL

ATC-29

ATC

2005 Pathfinder

Discharge Air Flow

EJS002WP

FRONT

REAR

LJIA0172E

WJIA0528E

WJIA1076E

WJIA1236E

ATC-30

AIR CONDITIONER CONTROL

2005 Pathfinder

System Description (Front)

EJS002WQ

SWITCHES AND THEIR CONTROL FUNCTION

WJIA0584E

WJIA1237E

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