Nissan Pathfinder (2011 year). Instruction — 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
Instructionly 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
1.
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)
INFOID:0000000006243626
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
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
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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N Diag
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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
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