Nissan Juke F15. Instruction — part 868
COMPONENT PARTS
HAC-107
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONING]
C
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E
F
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A
B
HAC
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BCM
INFOID:0000000012200104
BCM transmits A/C ON signal and blower fan ON signal to ECM via CAN communication, according to A/C
switch signal and blower fan ON signal that are received from A/C control and thermo control amp. signal that
is received from thermo control amp. At this moment, BCM turns A/C indicator ON.
ECM
INFOID:0000000012200105
ECM, when receiving A/C ON signal and blower fan ON signal from BCM, transmits A/C compressor request
signal to IPDM E/R via CAN communication according to status of the engine and refrigerant pressure.
IPDM E/R
INFOID:0000000012200106
A/C relay is integrated in IPDM E/R. IPDM E/R operates A/C relay when A/C compressor request signal is
received from ECM via CAN communication line.
Refrigerant Pressure Sensor
INFOID:0000000012200107
DESCRIPTION
• The refrigerant pressure sensor converts high-pressure side refrigerant pressure into voltage and outputs it
to ECM.
• ECM operates cooler cycle protection and cooling fan speed control according to voltage value that is input.
STRUCTURE AND OPERATION
• The refrigerant pressure sensor is a capacitance type sensor. It consists of a pressure detection ares and a
signal processing area.
• The pressure detection area, which is a variable capacity condenser, changes internal static capacitance
according to pressure force.
• The signal processing area detects the static capacitance of the pressure detection area, converts the static
capacitance into a voltage value, and transmits the voltage value to ECM.
Magnet Clutch
INFOID:0000000012200108
Compressor is driven by the magnet clutch which is magnetized by electric power supply.
PBIB2657E
HAC-108
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONING]
SYSTEM
SYSTEM
System Diagram
INFOID:0000000012200109
System Description
INFOID:0000000012200110
DESCRIPTION
• Instruction air conditioning system is controlled by each function of thermo control amp., BCM, ECM and IPDM
E/R.
• Fan speed of blower motor is changed by the combination of fan control dial operation and blower fan resis-
tor control.
CONTROL BY THERMO CONTROL AMP.
CONTROL BY BCM
CONTROL BY ECM
•
• Cooling fan control: Refer to
EC-65, "COOLING FAN CONTROL : System Description"
.
CONTROL BY IPDM E/R
•
• Cooling fan control: Refer to
PCS-10, "POWER CONTROL SYSTEM : System Description"
Compressor Control
INFOID:0000000012200111
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.
BCS-12, "SIGNAL BUFFER SYSTEM : System Description"
.
NOTE:
Compressor operational condition
• A/C switch signal ON or defroster position signal ON
JMIIA1241GB
SYSTEM
HAC-109
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONING]
C
D
E
F
G
H
J
K
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A
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HAC
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• Blower fan ON signal: ON
• Thermo control amp. 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.
PCS-7, "RELAY CONTROL SYSTEM : System Description"
CONTROL BY THERMO CONTROL AMP.
Low Temperature Protection Control
• When the thermo control amp. detects that evaporator fin tempera-
ture 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 temperature control dial (air mix PBR) and MODE dial (MODE
switch).
• 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. signal ON
⇔ OFF.
CONTROL BY ECM
Compressor Protection Control at Pressure Malfunction
When 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 stops the compressor.
• 3.12 MPa (31.82 kg/cm
2
, 452.4 psi) or more (When the engine speed is less than 1,500 rpm)
• 2.74 MPa (27.95 kg/cm
2
, 397.3 psi) or more (When the engine speed is 1,500 rpm or more)
• 0.14 MPa (1.43 kg/cm
2
, 20.3 psi) or less
Compressor Oil Circulation Control
When the engine starts while the engine coolant temperature is 56
°C (133°F) or less, ECM activates the com-
pressor for approximately 6 seconds and circulates the compressor oil once.
Air Conditioning Cut Control
When the engine condition is high load, ECM transmit A/C relay OFF request to IPDM E/R, and stops the
compressor.
EC-63, "AIR CONDITIONING CUT CONTROL : System Description"
.
Door Control
INFOID:0000000012200112
SWITCHES AND THEIR CONTROL FUNCTIONS
JMIIA1055GB
HAC-110
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONING]
SYSTEM
*: Models for Canada
1.
Intake door
2.
Blower motor
3.
Air conditioner filter
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
Fresh air intake
Recirculation air
Defroster
Center ventilator
Side ventilator
Foot
Rear foot
*
JPIIA1584ZZ
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