Nissan Pathfinder (2011 year). Manual — part 444

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-15

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

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AUTOMATIC AIR CONDITIONER SYSTEM

Control System Diagram

INFOID:0000000006243621

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:0000000006243622

CONTROL OPERATION

AWIIA0223GB

2011 Pathfinder

HAC-16

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

AUTOMATIC AIR CONDITIONER SYSTEM

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 foot 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

2011 Pathfinder

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-17

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

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FRONT BLOWER CONTROL SWITCHES

Manually control the blower speed.

Rear Air Controls

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 (FRONT)

When the REAR CTRL switch is in the off (indicator off) the rear air control (front) controls the rear blower

motor speed regardless of the rear air control (rear) blower control dial (rear) position. The rear air control

(front) controls the blower motor speed.

REAR BLOWER CONTROL DIAL (REAR)

When the REAR CTRL switch is on (indicator on) the rear air control (rear) controls the rear blower motor

speed regardless of the rear air control (front) blower control dial (front) position. The rear air control (rear)

controls the blower motor speed.

MAGNET CLUTCH CONTROL

When A/C switch or DEF switch is pressed, A/C auto amp. inputs compressor ON signal to BCM.

BCM sends compressor ON signal to ECM and A/C auto amp., via CAN communication line.

AWIIA0224ZZ

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Rear air control (front)

2.

Rear air control (rear)

AWIIA0089GB

2011 Pathfinder

HAC-18

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

AUTOMATIC AIR CONDITIONER SYSTEM

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.

Discharge Air Flow (Front)

INFOID:0000000006243623

Mode door position

Air outlet/distribution

Vent

Foot

Defroster

100%

0%

—

60%

40%

—

18%

64%

18%

14%

53%

33%

—

13%

87%

LJIA0172E

2011 Pathfinder

AUTOMATIC AIR CONDITIONER SYSTEM

HAC-19

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

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Switches And Their Control Function (Front)

INFOID:0000000006243624

WJIA1680E

AWIIA0236GB

2011 Pathfinder

HAC-20

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

AUTOMATIC AIR CONDITIONER SYSTEM

Switches And Their Control Function (Rear)

INFOID:0000000006243625

AWIIA0239GB

AWIIA0240GB

2011 Pathfinder

DIAGNOSIS SYSTEM (HVAC)

HAC-21

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

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DIAGNOSIS SYSTEM (HVAC)

CONSULT-III Function (HVAC)

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CONSULT-III can display each diagnostic item using the diagnostic test modes shown following.

SELF-DIAGNOSIS

Display Item List

DATA MONITOR

Display Item List

Diagnostic mode

Description

SELF DIAGNOSTIC RESULT

Displays A/C auto amp. self-diagnosis results.

DATA MONITOR

Displays A/C auto amp.l input/output data in real time.

CAN DIAG SUPPORT MNTR

The result of transmit/receive diagnosis of CAN communication can be read.

ECU IDENTIFICATION

A/C auto amp. part number can be read.

DTC

Description

Reference page

B2573

Battery voltage out of range

CHG-5, "Work Flow"

B2578

In-vehicle sensor circuit out of range (low)

HAC-82, "In-Vehicle Sensor Diagnosis Procedure"

B2579

In-vehicle sensor circuit out of range (high)

B257B

Ambient sensor circuit short

HAC-79, "Ambient Sensor Diagnosis Procedure"

B257C

Ambient sensor circuit open

B257F

Optical sensor (Driver) circuit open or short

HAC-85, "Optical Sensor Diagnosis Procedure"

.

B2580

Optical sensor (Passenger) circuit open or short

B2581

Intake sensor circuit short

HAC-87, "Intake Sensor Diagnosis Procedure"

B2582

Intake sensor circuit open

U1000

CAN bus fault

LAN-4, "System Description"

Monitor item

Value

Contents

BATT VIA CAN

"V"

Displays battery voltage signal.

IGN VIA CAN

"ON/OFF"

Displays ignition switch signal.

DVR SUNLD SEN

"w/m2"

Displays optical sensor (driver) signal.

PAS SUNLD SEN

"w/m2"

Displays optical sensor (passenger) signal.

AMB TEMP SEN

"

°

C/

°

F"

Displays ambient sensor signal.

EVAP TEMP SEN

"

°

C/

°

F"

Displays intake sensor signal.

INCAR TMP SEN

"

°

C/

°

F"

Displays in-vehicle sensor signal.

RR TEMPSET FR

"V"

Displays air mix door (front) set point signal.

RR TEMPSET RR

"V"

Displays air mix door (rear) set point signal.

MODE FDBCK

"V"

Displays mode door motor feedback signal.

DVR MIX FDBCK

"V"

Displays air mix door motor (driver) feedback signal.

PAS MIX FDBCK

"V"

Displays air mix door motor (passenger) feedback signal.

RR FDBCK

"V"

Displays air mix door motor (rear) feedback signal.

2011 Pathfinder

HAC-22

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONER]

DIAGNOSIS SYSTEM (BCM)

DIAGNOSIS SYSTEM (BCM)

COMMON ITEM
COMMON ITEM : CONSULT-III Function (BCM - COMMON ITEM)

INFOID:0000000006710643

APPLICATION ITEM

CONSULT-III performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions.

Direct Diagnostic Mode

Description

Ecu Identification

The BCM part number is displayed.

Self Diagnostic Result

The BCM self diagnostic results are displayed.

Data Monitor

The BCM input/output data is displayed in real time.

Active Test

The BCM activates outputs to test components.

Work support

The settings for BCM functions can be changed.

Configuration

• The vehicle specification can be read and saved.
• The vehicle specification can be written when replacing BCM.

CAN Diag Support Mntr

The result of transmit/receive diagnosis of CAN communication is displayed.

System

Sub System

Direct Diagnostic Mode

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Door lock

DOOR LOCK

×

×

×

×

Rear window defogger

REAR DEFOGGER

×

×

Warning chime

BUZZER

×

×

Interior room lamp timer

INT LAMP

×

×

×

Remote keyless entry system

MULTI REMOTE ENT

×

×

×

Exterior lamp

HEAD LAMP

×

×

×

Wiper and washer

WIPER

×

×

×

Turn signal and hazard warning lamps FLASHER

×

×

Air conditioner

AIR CONDITIONER

×

Intelligent Key system

INTELLIGENT KEY

×

Combination switch

COMB SW

×

BCM

BCM

×

×

×

×

×

Immobilizer

IMMU

×

×

×

Interior room lamp battery saver

BATTERY SAVER

×

×

×

Back door open

TRUNK

×

×

Vehicle security system

THEFT ALM

×

×

×

RAP system

RETAINED PWR

×

×

×

Signal buffer system

SIGNAL BUFFER

×

×

TPMS

AIR PRESSURE MONITOR

×

×

×

×

Panic alarm system

PANIC ALARM

×

2011 Pathfinder