Nissan Qashqai J11. Manual — part 1098
HAC-28
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
SYSTEM
Except for Europe and Russia
*: Air inlet status is displayed by indicator during activating automatic control
AIR DISTRIBUTION
Without rear ventilator, without rear foot
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 switch
DEF switch
REC switch
*
—
—
—
—
FRE switch
*
Temperature control
dial (Driver side)
DUAL
switch:
OFF
Full cold
18.0
°
C
—
18.5
°
C – 31.5
°
C
AUTO
Full hot
32.0
°
C
Temperature control
dial (Driver side)
DUAL
switch:
ON
Full cold
18.0
°
C
—
18.5
°
C – 31.5
°
C
AUTO
Full hot
32.0
°
C
Temperature control
dial (Passenger side)
Full cold
18.0
°
C
—
18.5
°
C – 31.5
°
C
AUTO
Full hot
32.0
°
C
ON·OFF switch
OFF
—
Discharge air flow
MODE position
Air outlet/distribution
Ventilator
Front foot
Defroster
Center
Side
V/D*
40%
35%
—
25%
VENT
54%
46%
—
—
B/L
31%
40%
29%
—
SYSTEM
HAC-29
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
*: These positions are applied only to models for Europe and Russia.
Without rear ventilator, with rear foot
With rear ventilator, with rear foot
AUTOMATIC AIR CONDITIONING SYSTEM : Cooling Fan Control
INFOID:0000000010503110
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
(HR engine models),
ECM-74, "COOLING FAN CONTROL : System Description"
ECM-654, "COOLING FAN CONTROL : System Description"
(MR20DD engine
models),
ECK-34, "COOLING FAN CONTROL : System Description"
"COOLING FAN CONTROL : System Description"
(R9M engine models).
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.
ALL*
21%
34%
31%
14%
FOOT
—
10%
58%
32%
D/F
—
9%
43%
48%
DEF
—
10%
—
90%
Discharge air flow
MODE position
Air outlet/distribution
Ventilator
Front foot
Defroster
Center
Side
Discharge air flow
MODE position
Air outlet/distribution
Ventilator
Foot
Defroster
Center
Side
Front
Rear
V/D
40%
35%
—
—
25%
VENT
54%
46%
—
—
—
B/L
33%
40%
16%
11%
—
ALL
22%
35%
16%
11%
16%
FOOT
—
11%
32%
25%
32%
D/F
—
8%
24%
19%
49%
DEF
—
10%
—
—
90%
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%
HAC-30
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
SYSTEM
• 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)
• 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:0000000010503109
• 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.
JMIIA3568GB
JMIIA3569GB
—
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
SYSTEM
HAC-31
< SYSTEM DESCRIPTION >
[AUTOMATIC AIR CONDITIONING]
C
D
E
F
G
H
J
K
L
M
A
B
HAC
N
O
P
AUTOMATIC AIR CONDITIONING SYSTEM : Fail-safe
INFOID:0000000010502850
FAIL-SAFE FUNCTION
If a communication error exists between the A/C auto amp. and A/C control for 30 seconds or longer, air con-
ditioning is controlled under the following conditions: A/C auto amp. is controlled in the setting state before the
communication error occurs for following setting.
• Set temperature
• Air outlet
• Blower fan speed
• Air inlet
• A/C switch
PTC HEATER CONTROL SYSTEM
PTC HEATER CONTROL SYSTEM : System Description
INFOID:0000000010499351
SYSTEM DIAGRAM
DESCRIPTION
• BCM performs PTC relay ON/OFF control based on engine speed, engine coolant temperature, electrical
power cut freeze signal (permission signal, retention signal, stop signal), blower motor operation state sig-
nal, front window defogger state signal, ambient temperature signal, battery voltage, and electrical load state
(high beam request, low beam request, and others).
• When PTC relay turns ON, power supply is supplied to PTC heater. Heating element is heated and air flow
temperature is increased. Heating is available for a period of time until engine coolant temperature is
increased when engine starts cold in cold climate.
• Idle up request signal is transmitted from BCM to ECM while PTC heater operates. Idle speed is increased,
warming-up is facilitated, and battery electric power is obtained.
• Electric power supplied to PTC heating element is subject to PTC relay control conditions.
NOTE:
PTC heater operation depends on ambient temperature and battery voltage. PTC heater is ON when ambient
temperature is 8
°
C or less. PTC heater is OFF when ambient temperature is 12
°
C (53.6
°
F) or more. PTC
heater is ON when battery voltage is 11.5 V or more. PTC heater is OFF when battery voltage is 11 V or less.
STOP/START SYSTEM
JMIIA3582GB
PTC heater
Operation
PTC relay-1
PTC relay-2
PTC relay-3
Electric power (W)
OFF
OFF
OFF
OFF
OFF
Approx. 0
PTC heater-1
LOW
ON
OFF
OFF
Approx. 333
PTC heater-2
MID
ON
ON
OFF
Approx. 666
PTC heater-3
HI
ON
ON
ON
Approx. 999
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