Nissan Frontier. Instruction — part 865
HAC-14
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
AUTOMATIC AIR CONDITIONER SYSTEM
Front air control without rear window defogger
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 operator.
• When pressing AUTO switch, air inlet, air outlet, blower speed, and discharge air temperature are automati-
cally controlled.
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 (IF EQUIPPED)
When switch is ON, rear window and door mirrors are defogged.
FRE (
) SWITCH (IF EQUIPPED)
When FRE switch is ON, FRE switch indicator turns ON, and air inlet is set to FRE.
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.
BLOWER CONTROL DIAL
The blower speed is instructionly controlled with this dial.
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 SWITCHES
Controls the air discharge outlets.
DUAL SWITCH
• When the DUAL switch indicator is illuminated, the driver and passenger temperature can each be set inde-
pendently.
• When the DUAL switch indicator is not illuminated, the driver temperature setting is applied to both sides.
ALIIA0770ZZ
AUTOMATIC AIR CONDITIONER SYSTEM
HAC-15
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
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 and front air control, 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.
Discharge Air Flow
INFOID:0000000009478267
WJIA2197E
Mode door position
Air outlet/distribution
Vent
Foot
Defroster
95%
5%
—
60%
40%
—
—
70%
30%
—
60%
40%
—
10%
90%
WJIA0540E
HAC-16
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
AUTOMATIC AIR CONDITIONER SYSTEM
Switches And Their Control Function
INFOID:0000000009478268
*1
: Inlet status is displayed by indicator when activating D/F mode.
*2
: If equipped (without rear defogger).
ALIIA0755GB
Switch/Dial position
Door position
Ventilator
door
MAX-COOL
door
Defroster
door
Intake
door
Air mix
door
MODE
switch
VENT
A
A
D
—
B/L
B
B
D
—
FOOT
C
B
D or C
—
D/F
C
B
B
—
DEF switch
C
C
A
B
—
REC switch
*1
—
A
—
FRE switch
*2
—
B
—
Temperature control dial
Full Cold
—
A
Full Cold
⇔ Full Hot
—
AUTO
Full Hot
—
B
DIAGNOSIS SYSTEM (HVAC)
HAC-17
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONER]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
DIAGNOSIS SYSTEM (HVAC)
CONSULT Function (HVAC)
INFOID:0000000009478269
CONSULT 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 Front air control self-diagnosis results.
DATA MONITOR
Displays Front air control input/output data in real time.
CAN DIAG SUPPORT MNTR
The result of transmit/receive diagnosis of CAN communication can be read.
ECU IDENTIFICATION
Front air control part number can be read.
DTC
Description
Reference page
B2573
Battery voltage out of range
CHG-2, "Work Flow (With EXP-800 NI or GR8-1200 NI)"
or
CHG-5, "Work Flow (Without EXP-800 NI or GR8-1200 NI)"
B2578
In-vehicle sensor circuit out of range (low)
HAC-51, "In-Vehicle Sensor Diagnosis Procedure"
B2579
In-vehicle sensor circuit out of range (high)
B257B
Ambient sensor circuit short
HAC-49, "Ambient Sensor Component Inspection"
B257C
Ambient sensor circuit open
B257F
Optical sensor (Driver) circuit open or short
HAC-54, "Optical Sensor Diagnosis Procedure"
B2580
Optical sensor (Passenger) circuit open or short
B2581
Intake sensor circuit short
HAC-57, "Intake Sensor Component Inspection"
B2582
Intake sensor circuit open
B2587
Stuck button
VTL-7, "Removal and Installation"
U1000
CAN bus fault
LAN-14, "Trouble Diagnosis Flow Chart"
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"
Displays ambient sensor signal.
EVAP TEMP SEN
"
°C"
Displays intake sensor signal.
INCAR TMP SEN
"
°C"
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.
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