Nissan Juke F15. Manual - part 868

COMPONENT PARTS

HAC-107

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

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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

• Manual 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.

HAC-108, "Compressor Control"

CONTROL BY BCM

HAC-108, "Compressor Control"

CONTROL BY ECM

•

HAC-108, "Compressor Control"

• Cooling fan control: Refer to 

EC-65, "COOLING FAN CONTROL : System Description"

.

CONTROL BY IPDM E/R

•

HAC-108, "Compressor Control"

• 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.

Refer to 

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]

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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.

Refer to 

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.

Refer to 

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