Nissan Cube. Manual — part 576
HAC-142
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONING]
MANUAL AIR CONDITIONING SYSTEM
COMPRESSOR CONTROL
Description
• BCM transmits the A/C ON signal and blower fan ON signal to ECM via CAN communication line only when
the compressor operational condition is satisfied, and A/C indicator is turned ON.
NOTE:
Compressor operational condition
• Thermo control amp. signal ON
• Blower fan signal ON
• A/C switch signal ON
• ECM judges the conditions of each sensor (Refrigerant pressure sensor signal, accelerator position signal,
etc.), and transmits the A/C compressor request signal to IPDM E/R via CAN communication line.
• By receiving the A/C compressor request signal from ECM, IPDM E/R turns the A/C relay to ON, and acti-
vates the compressor.
Compressor Protection Control at Pressure Malfunction
The high-pressure side value that is detected by refrigerant pressure sensor is as per the following state, ECM
requests IPDM E/R to turn A/C relay OFF and stop the compressor.
• 3.12 MPa (31.8 kg/cm
2
, 452 psi) or more (When the engine speed is less than 1,500 rpm)
1.
A/C switch
2.
Fan control dial
3.
Rear window defogger switch
4.
MODE dial
5.
Intake switch
6.
Temperature control dial
A/C switch
The compressor control (switch indicator) is turned ON
⇔
OFF each time by pressing this switch
while the blower motor is activated.
NOTE:
when mode position is D/F or DEF, A/C switch is turned ON forcibly.
Fan control dial
Fan speed can be adjusted within a range from 1st to 4th.
Rear window defogger
switch
• Rear window defogger (switch indicator) is turned ON
⇔
OFF each time by pressing this switch.
• Rear window defogger system details, Refer to
.
MODE dial
• Mode position is selected to an optimal position by operating this dial.
• When DEF or D/F is selected while blower motor is activated, the air conditioner will automatically
turn on and the air inlet becomes fresh air intake.
Intake switch
The air inlet changed ON
⇔
OFF each time by pressing this switch.
• Indicator ON: Recirculation
• Indicator OFF: Fresh air intake
NOTE:
when mode position is D/F or DEF, air inlet is set to FRE forcibly.
Temperature control dial
The setting temperature can be selected to an optimum temperature by operating this dial.
JPIIA1674ZZ
MANUAL AIR CONDITIONING SYSTEM
HAC-143
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONING]
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• 2.74 MPa (27.9 kg/cm
2
, 397 psi) or more (When the engine speed is 1,500 rpm or more)
• 0.14 MPa (1.4 kg/cm
2
, 20 psi) or less
Low Temperature Protection Control
• When the thermo control amp. detects that evaporator surface
temperature is 2
°
C (36
°
F) or less, thermo control amp. signal
becomes OFF, and stops the compressor.
• When the air temperature returns to 3.5
°
C (38
°
F) or more, the
compressor is activated.
Operating Rate Control
• Thermo control amp. detects the positions of air temperature control dial and MODE dial.
• Thermo control amp. corrects the stopping temperature of A/C compressor depending on the condition of A/
C operation, and prevents too much heating by turning thermo control amp. ON
⇔
OFF.
Air conditioner Cut Control
When the engine condition is high load, ECM makes the A/C relay to OFF, and stops the compressor. Refer to
SWITCHES AND THEIR CONTROL FUNCTIONS
SJIA0802E
1.
Intake door
2.
Blower motor
3.
In-cabin microfilter
4.
Evaporator
5.
Upper air mix door
6.
Lower air mix door
7.
Heater core
8.
Foot door
9.
Side ventilator door
10. Sub defroster door
11.
Center ventilator and defroster door
JPIIA1584ZZ
HAC-144
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONING]
MANUAL AIR CONDITIONING SYSTEM
*With rear foot duct
AIR DISTRIBUTION
Without Rear Foot Duct
With Rear Foot Duct
Fresh air intake
Recirculation air
Defroster
Center ventilator
Side ventilator
Foot
Rear foot*
Switch/Dial
position
Door position
Ce
nt
er v
e
n
til
ato
r a
nd
de
fr
os
te
r do
or
Su
b d
e
fr
os
ter
do
or
Si
d
e
ve
nt
ila
tor do
or
Fo
ot
do
or
In
ta
k
e
do
or
Up
pe
r
a
ir m
ix
do
or
Lo
we
r
a
ir m
ix
do
or
MODE dial
P
M
L
G
—
—
—
K
H
Q
O
J
I
N
M
G
Intake switch
—
—
—
—
A
B
Temperature con-
trol dial
Full cold
—
D
E
Full hot
C
F
Discharge air flow
Mode position indication
Air outlet/distribution
Ventilator
Foot
Defroster
100%
—
—
63%
37%
—
16%
64%
20%
14%
55%
31%
18%
—
82%
Discharge air flow
Mode position indication
Air outlet/distribution
Ventilator
Front foot
Rear foot
Defroster
100%
—
—
—
57%
29%
14%
—
19%
44%
19%
18%
17%
40%
17%
26%
18%
—
—
82%
MANUAL AIR CONDITIONING SYSTEM
HAC-145
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONING]
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Component Part Location
INFOID:0000000009951058
Component Description
INFOID:0000000009951059
1.
Magnet clutch
2.
Refrigerant pressure sensor
3.
A/C control
4.
Blower motor
5.
Blower fan resistor
6.
Intake door motor
7.
Thermo control amp.
A.
Located in the right side of A/C unit
assembly
B.
Located in the back of A/C unit as-
sembly
C.
Located in the left side of A/C unit as-
sembly
D.
Located on evaporator
JPIIA1740ZZ
Component
Reference/Function
Magnet clutch
Refrigerant pressure sensor
A/C control
Controls the air conditioner function.
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