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![NISSAN NOTE 2016 Service Repair Manual COMPONENT PARTSHAC-9
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SYSTEM DESCRIPTION
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Component Parts LocationINFOID:0000000012430716
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COMPONENT PARTSHAC-9
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SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000012430716
A. RH front of engine compartment B. Behind LH side of front fascia No. Component Description
1. ECM The ECM sends a compressor ON request to the IPDM E/R based on the status of engine
operation and load as well as refrigerant pressure information. If all the conditions are met for
A/C operation, the ECM transmits the compressor ON request to the IPDM E/R.
2. IPDM E/R A/C relay is integrated in IPDM E/R. IPDM
E/R operates A/C relay when receiving A/C com-
pressor request signal from ECM via CAN communication line.
3. A/C compressor Vaporized refrigerant is drawn into the A/C compressor from the evaporator, where it is com-
pressed to a high pressure, high temperature vapor. The hot, compressed vapor is then dis-
charged to the condenser.
4. Refrigerant pressure sensor Refer to EC-27, "
Refrigerant Pressure Sensor".
ALIIA0811ZZ
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![NISSAN NOTE 2016 Service Repair Manual HAC-10
< SYSTEM DESCRIPTION >[MANUAL AIR CONDITIONING]
COMPONENT PARTS
A. LH side of instrument panel B. Behind center of instrument panel C. Center of instrument panel
No. Component Description
1. BC NISSAN NOTE 2016 Service Repair Manual HAC-10
< SYSTEM DESCRIPTION >[MANUAL AIR CONDITIONING]
COMPONENT PARTS
A. LH side of instrument panel B. Behind center of instrument panel C. Center of instrument panel
No. Component Description
1. BC](/manual-img/5/57363/w960_57363-1977.png)
HAC-10
< SYSTEM DESCRIPTION >[MANUAL AIR CONDITIONING]
COMPONENT PARTS
A. LH side of instrument panel B. Behind center of instrument panel C. Center of instrument panel
No. Component Description
1. BCM The BCM receives the fan ON and A/C ON signals from the front air control and sends a com-
pressor ON request to the ECM.
2. Fuse Block (J/B) Located in the passenger compartment, behind the left lower IP, the Fuse Block (J/B) con-
tains the front blower motor relay and several fuses required for the air conditioner control
system.
3. Blower relay The blower relay controls the flow of current to fuse 20, 21 and 22 in the Fuse Block (J/B).
The relay is connected directly to ground, and is energized when the ignition switch is in the
ON or START position.
4. Front blower motor The front blower motor varies the speed at which the air flows through the ventilation system.
5. Front blower motor resistor Ground for the blower is supplied through blower resistor and the blower speed switch. As
the switch is moved from position 1 through 4, more current is allowed to flow through the
motor, for a higher speed. This is because less resistors are in the path as the switch is
moved to a higher position. When the switch is on the highest position, all resistors are by-
passed.
6. Thermo control amp. Thermo control amp. is composed of thermistor and amplifier. When the A/C switch signal is
received from the front air control, the thermo control amp. transmits the A/C ON signal to the
BCM according to evaporator fin temperature. When the thermistor detecting temperature of
the air that passes through evaporator is extremely low, the thermo control amp. sends the
A/C OFF signal to BCM, and stops the compressor.
7. Front air control The front air control controls the operation of the A/C and heating system.
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SYSTEMHAC-11
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SYSTEM
System DescriptionINFOID:0000000012430717
SYSTEM DIAGRAM
SYSTEM DESCRIPTION
• The manual air conditioning system is c ontrolled by a sequence of functions from the front air control, BCM,
ECM, and IPDM E/R.
• The fan speed of the front blower motor is changed by t he combination of the fan control dial (fan switch)
operation and blower resistor control.
Compressor ControlINFOID:0000000012430718
PRINCIPLE OF OPERATION
Compressor is not activated.
Functional Circuit Diagram
ALIIA0813GB
Module/Function Door control A/C request signalCompressor control Cooling fan control
Front air control HAC-13
— HAC-11—
BCM —BCS-7
(With Intelligent Key system)
BCS-78
(Without Intelligent Key system) ——
ECM — —HAC-11
EC-38
IPDM E/R — —HAC-11EC-38
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![NISSAN NOTE 2016 Service Repair Manual HAC-12
< SYSTEM DESCRIPTION >[MANUAL AIR CONDITIONING]
SYSTEM
Functional Initial Inspection Chart
×
: Applicable
DESCRIPTION
• When A/C switch signal is received from front air control, the thermo NISSAN NOTE 2016 Service Repair Manual HAC-12
< SYSTEM DESCRIPTION >[MANUAL AIR CONDITIONING]
SYSTEM
Functional Initial Inspection Chart
×
: Applicable
DESCRIPTION
• When A/C switch signal is received from front air control, the thermo](/manual-img/5/57363/w960_57363-1979.png)
HAC-12
< SYSTEM DESCRIPTION >[MANUAL AIR CONDITIONING]
SYSTEM
Functional Initial Inspection Chart
×
: Applicable
DESCRIPTION
• When A/C switch signal is received from front air control, the thermo control amp. transmits A/C ON signal to
the BCM according to evaporator fin temperature.
• When the front blower motor is operated, the front air control transmits blower fan ON signal to the BCM.
• BCM transmits the A/C ON signal and blower fan ON signal to ECM via CAN communication line. Refer to LAN-25, "
CAN COMMUNICATION SYSTE M : System Description"
• 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 EC M, IPDM E/R turns the A/C relay to ON, and acti-
vates the compressor. Refer to PCS-5, "
RELAY CONTROL SYSTEM : System Description".
CONTROL BY THERMO CONTROL AMP.
L (1) : Fan ON signal CAN (1) : A/C ON signal
L (2) : A/C switch signal : Blower fan ON signal
L (3) : Defroster position switch 2 CAN (2) : A/C compressor request signal
L (4) : Thermo control amp. ON signal : A/C compressor feedback signal
JPIIA1661GB
Control unitDiagnosis item Location
ABCDE
BCM “BCM-AIR COND” Self-diagnosis
—×———
Data monitor ×————
ECM “ENGINE” Self-diagnosis
(CAN communication line)
———
×—
Data monitor —×× ——
IPDM E/R “IPDM E/R” Self-diagnosis
(CAN communication line)
————
×
Data monitor — — — ×—
Auto active test — — — —×
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Low Temperature Protection Control
• When thermo control amp. detects
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Low Temperature Protection Control
• When thermo control amp. detects
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SYSTEMHAC-13
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Low Temperature Protection Control
• When thermo control amp. detects
that evaporator fin temperature
is 1.5° C (35° F) or less, thermo control amp. switches A/C ON sig-
nal to OFF and stops the compressor.
When the evaporator fin temperature returns to 3 °C (37° F) or
more, the compressor is activated.
CONTROL BY ECM
Refrigerant Pressure Protection
The refrigerant system is protected against excessively high- or low-pressures by the refrigerant pressure s\
en-
sor, located on the liquid tank on the condenser. The refr igerant pressure sensor detects the pressure inside
the refrigerant line and sends a voltage signal to the ECM. If the system pressure rises above or falls below
the following values, the ECM requests the IPDM E/ R to de-energize the A/C relay and disengage the com-
pressor.
• 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 Cir culation 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 is under a high load condition, the ECM transmits an A/C relay OFF request to IPDM E/R,
and stops the compressor. Refer to EC-37, "
AIR CONDITIONING CUT CONTROL : System Description".
Door ControlINFOID:0000000012430719
SWITCHES AND THEIR CONTROL FUNCTIONS
JMIIA1228GB
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HAC-14
< SYSTEM DESCRIPTION >[MANUAL AIR CONDITIONING]
SYSTEM
*: With rear foot duct
AIR DISTRIBUTION
With rear foot duct
1. Intake door
2. Blower motor 3. Evaporator
4. Air mix door 5. Heater core 6. Foot door
7. Ventilator and defroster door Fresh air intake Recirculation air Defroster
Center ventilator Side ventilator
Foot Rear foot
*
Switch/Dial
position Door position
Ventilator and
defroster door
Foot door
Intake door
Air mix door
MODE dial B
A
— —
A – B
A A – B
A – B
A
Air intake lever ——A
B
Temperature control dial Full cold
—A
Full hot B
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SYSTEMHAC-15
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Without rear foot duct
Discharge air flow
Mode position indi- cation Air outlet/distribution
Ventilator Foot
Defroster
Center SideFront Rear
50% 50% —— —
29% 25%28% 18% —
— 14% 47% 22%17%
— 14% 36% 20%30%
— 22% ——78%
Discharge air flow
Mode position indication Air outlet/distribution
Ventilator FootDefroster
Center Side
50% 50% ——
30% 30%40% —
— 14% 66%20%
— 14% 51%35%
—2 2%—7 8%
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HAC-16
< SYSTEM DESCRIPTION >[MANUAL AIR CONDITIONING]
OPERATION
OPERATION
Switch Name and FunctionINFOID:0000000012430720
CONTROLLER
SWITCH OPERATION
1. Fan control dial (fan switch) 2. MODE dial
3. Intake lever
4. Temperature control dial 5. A/C switch
AWLIA2419ZZ
Fan control dial (fan switch) Fan speed can be adjusted within a range from 1st to 4th.
MODE dialMode position is selected to an optimal position by operating this dial.
Intake lever The air inlet changes REC ⇔ FRE each time by operation this lever.
Temperature control dial The setting temperature can be selected to an optimum temperature by operating this dial.
A/C switch The compressor control (switc
h indicator) is turned ON ⇔ OFF each time by pressing this switch while
the blower motor is activated.
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