Nissan X-Trail 32. Instruction — part 1388
SYSTEM
HAC-27
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
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A
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HAC
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*: Air inlet status is displayed by indicator during activating automatic control
AIR DISTRIBUTION
Switch/dial position
Door position
Mode door
In
ta
k
e
do
or
Air mix door
Ce
nt
e
r v
e
n
til
at
o
r a
n
d
de
fr
ost
e
r
do
or
S
u
b
de
fros
te
r do
or
Si
de
v
e
n
til
at
o
r
do
or
Fo
ot doo
r
Driver side
Pa
ss
en
ge
r si
de
AUTO switch
AUTO
—
—
—
• MODE VENT switch
• MODE FOOT switch
• MODE DEF switch
• MAX DEF switch
MODE
position
VENT/DEF (V/D)
VENT
Bi-level (B/L)
ALL
FOOT
DEF/FOOT (D/F)
DEF
INTAKE switch*
REC
—
—
—
—
FRE
Temperature control
dial (Driver side)
DUAL
switch:
OFF
Full cold
Lo
—
16.0
°
C – 30.0
°
C
AUTO
Full hot
HI
Temperature control
dial (Driver side)
DUAL
switch:
ON
Full cold
Lo
—
16.0
°
C – 30.0
°
C
AUTO
Full hot
HI
Temperature control
dial (Passenger side)
Full cold
Lo
—
16.0
°
C – 30.0
°
C
AUTO
Full hot
HI
ON·OFF switch
OFF
—
HAC-28
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
SYSTEM
AUTOMATIC AIR CONDITIONING SYSTEM : Cooling Fan Control
INFOID:0000000010939707
DESCRIPTION
A/C auto amp. controls the cooling fan operation request according to the refrigerant pressure status and vehi-
cle speed status.
NOTE:
For an overview of the cooling fan and information about control, refer to
(MR20DD engine models),
EC-472, "COOLING FAN CONTROL : System Description"
(QR25DE engine models) or
EC-843, "COOLING FAN CONTROL : System Description"
(R9M engine mod-
els).
CONTROL OUTLINE
• A/C auto amp. receives the refrigerant pressure sensor signal from ECM via CAN communication, and the
vehicle speed signal from the combination meter via CAN communication.
• A/C auto amp. sets one of the optionally determined stages according to the received refrigerant pressure
sensor signal and vehicle speed signal.
NOTE:
For the rules that prescribe the predetermined stages, refer to the following figures.
• Vehicle speed stages
Vehicle speed [Km/h (MPH)]
-
: 12 (7.5)
-
: 20 (12)
-
: 72 (45)
-
: 80 (50)
• Refrigerant pressure stages
Refrigerant pressure [MPa (bar, kg/cm
2
, psi)]
-
: 0.7 (7, 7.14, 102)
-
: 1.0 (10, 10.2, 145)
-
: 1.28 (12.8, 13.1, 186)
-
: 1.58 (15.8, 16.1, 229)
-
: 1.88 (18.8, 19.2, 273)
-
: 2.08 (20.8, 21.2, 302)
Discharge air flow
MODE position
Air outlet/distribution
Ventilator
Foot
Defroster
Front
Rear
Front
Rear
Center
Side
V/D
39%
27%
11%
—
—
23%
VENT
47%
38%
15%
—
—
—
B/L
25%
34%
13%
18%
10%
—
ALL
21%
27%
11%
20%
10%
11%
FOOT
—
7%
4%
38%
24%
27%
D/F
—
6%
2%
30%
17%
45%
DEF
—
8%
2%
—
—
90%
JMIIA3568GB
JMIIA3569GB
SYSTEM
HAC-29
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
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HAC
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• The requested cooling fan operation strength (0%, 40%, 100%) is determined as shown in the following
table according to the combination of these two stages, and the request signal is transmitted to ECM via
CAN communication.
Cooling fan operation strength
Unit: %
AUTOMATIC AIR CONDITIONING SYSTEM : Door Motor Starting Position Reset
Control
INFOID:0000000010939708
• Step motors are used for the mode door motor air mix door motor (driver side/passenger side), and intake
door motor.
• Because the step motors do not have position detection mechanisms, there may be a deviation between the
door position recognized by A/C auto amp. and the actual door position.
Therefore, A/C auto amp. performs motor zero position reset for aligning its recognized door position with
the actual door position.
• The reset signal is transmitted from A/C auto amp. to the air mix door motor (driver side/passenger side),
mode door motor, and intake door motor, which then perform zero position reset.
• After any of the following conditions is met, A/C auto amp. performs motor zero position reset when the igni-
tion switch is next turned ON.
- The battery terminal is disconnected and then reconnected.
- The travel distance reaches 3,000 km (1846 miles). [Performed every 3,000 km (1846 miles).]
• If A/C auto amp., air mix door motor (driver side, passenger side), mode door motor, or intake door motor is
removed, it is necessary to perform motor zero position reset using CONSULT.
—
Refrigerant pressure stages
1
2
3
4
Vehicle speed stag-
es
1
40
40
100
100
2
40
40
100
100
3
0
0
0
100
HAC-30
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
SYSTEM
AUTOMATIC AIR CONDITIONING SYSTEM : Circuit Diagram
INFOID:0000000010941032
MR20DD AND QR25DE ENGINE MODELS
JMIIA3665GB
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