Nissan Juke (2016 year). Service Repair Manual — part 422

SYSTEM

HAC-13

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

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- Perform the correction of the temperature detected with the ambient sensor for air conditioning control.

- Select and use the initial value of ambient temperature data depending on the engine coolant temperature

when turning the ignition switch from OFF to ON. Use the detection temperature of the ambient sensor at

low coolant temperature [less than approximately 56

°

C (133

°

F)]. Use the memory data (before the ignition

switch is OFF) when the engine is warming up [approximately 56

°

C (133

°

F) or more].

- Do not perform the correction of the ambient temperature when the detection temperature of the ambient

temperature is less than approximately

−

20

°

C (–4

°

F).

Passenger room temperature correction

- The A/C auto amp. inputs the temperature detected with the in-vehicle sensor as the passenger room tem-

perature.

- Perform the correction of the temperature detected with the in-vehicle sensor for air conditioning control.

- The A/C auto amp. performs the correction so that the recognition passenger room temperature changes

depending on the difference between the detected passenger room temperature and the recognition pas-

senger room temperature. If the difference is large, the changing is early. The changing becomes slow as

the difference becomes small.

Intake temperature correction

- The A/C auto amp. inputs the temperature detected with the intake sensor as the intake temperature.

- Perform the correction of the temperature detected with the intake sensor for air conditioning control.

- The A/C auto amp. performs the correction so that the recognition intake temperature changes depending

on the difference between the detected intake temperature and the recognition intake temperature. If the dif-

ference is large, the changing is early. The changing becomes slow as the difference becomes small.

Sunload amount correction

- The A/C auto amp. inputs the sunload amount detected with the sunload sensor.

- Perform the correction of the sunload amount detected with the sunload sensor for air conditioning control.

- When the sunload amount suddenly changes, for example when entering a tunnel, perform the correction so

that the recognition sunload amount of the A/C auto amp. changes slowly.

Set temperature correction

- A/C auto amp. controls The A/C auto amp. performs the correction to the target temperature set by the tem-

perature control switch so as to match the temperature felt by the passengers depending on the ambient

temperature detected with the ambient sensor and controls it so that the interior air temperature is always

the most suitable.

CONTROL BY BCM

•

HAC-15, "Compressor Control"

CONTROL BY ECM

•

HAC-15, "Compressor Control"

• Cooling fan control. Refer to

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

.

CONTROL BY IPDM E/R

•

HAC-15, "Compressor Control"

• Cooling fan control. Refer to

PCS-10, "POWER CONTROL SYSTEM : System Description"

.

Temperature Control

INFOID:0000000012200010

• When ignition switch is in the ON position, A/C auto amp. always

automatically controls temperature regardless of air conditioner

operational state.

• A/C auto amp. calculates the target air mix door opening angle

depending on set temperature, in-vehicle temperature, ambient

temperature, and sunload.

• Air mix door is controlled depending on the comparison of current

air mix door opening angle and target air mix door opening angle.

• Regardless of in-vehicle temperature, ambient temperature, and

sunload, air mix door is fixed at the fully cold position when set

temperature is 18

°

C (60

°

F), and at the fully hot position when set

temperature is 32

°

C (90

°

F).

JPIIA0633GB

Revision: November 2015

2016 JUKE

HAC-14

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

SYSTEM

Air Outlet Control

INFOID:0000000012200011

• While air outlet is in automatic control, A/C auto amp. selects the

mode door position depending on a target air mix door angle and

outlet air temperature calculated from sunload.

• If ambient temperature is excessively low, D/F is selected to pre-

vent windshield fogging when air outlet is set to FOOT.

Air Flow Control

INFOID:0000000012200012

DESCRIPTION

• A/C auto amp. changes gate voltage of power transistor and controls air flow continuously. When air flow is

increased, voltage of blower motor gradually increases to prevent a sudden increase in air flow.

• In addition to manual control and automatic control, air flow control is compose of starting fan speed control,

low coolant temperature starting control, high in-vehicle temperature starting control, and blower speed con-

trol at door motor operation.

AUTOMATIC AIR FLOW CONTROL

• A/C auto amp. decides target air flow depending on target air mix door opening angle.

• A/C auto amp. changes voltage of blower motor and controls air flow continuously so that air flow matches to

target air flow.

• When air outlet is VENT or B/L, the minimum air flow is changed

depending on sunload.

STARTING FAN SPEED CONTROL

When blower motor is activated, A/C auto amp. gradually increases voltage of blower motor to prevent a sud-

den increase in discharge air flow. (T

1 –

T

2

= approximately 8 seconds)

NOTE:

Do not perform the starting air flow control when the discharge outlet

is set to DEF.

LOW COOLANT TEMPERATURE STARTING CONTROL

JMIIA0710GB

JMIIA1129GB

JMIIA1130GB

Revision: November 2015

2016 JUKE

SYSTEM

HAC-15

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

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If the engine coolant temperature is 56

°

C (133

°

F) or less, to prevent

a cold discharged air flow, A/C auto amp. suspends blower motor

activation for the maximum 150 seconds depending on target air mix

door opening angle. After this, voltage of blower motor is increased

gradually, and blower motor is activated.

FAN SPEED CONTROL AT DOOR MOTOR OPERATION

When mode door motor is activated while air flow is more than the specified value, A/C auto amp. reduces

temporarily fan speed so that mode door moves smoothly.

HIGH IN- TEMPERATURE STARTING CONTROL

When evaporator temperature is high [intake air temperature sensor value is 35

°

C (95

°

F) or more], to prevent

a hot discharged air flow, A/C auto amp. suspends blower motor activation for approximately 3 seconds so

that evaporator is cooled by refrigerant.

Air Inlet Control

INFOID:0000000012200013

• While air inlet is in automatic control, A/C auto amp. selects air

inlet (fresh air intake, 20% fresh air intake, or recirculation)

depending on set temperature, in-vehicle temperature, and ambi-

ent temperature.

NOTE:

Air inlet is fixed to REC, when the ambient temperature is 21

°

C

(70

°

F) or more.

• Air inlet is fixed to 80% FRE, only when the conditions are satisfied

as follows:

- Air inlet is FOOT or D/F

- Ambient temperature is 2

°

C (36

°

F) or less

- Maximum fan speed

Compressor Control

INFOID:0000000012200014

DESCRIPTION

• When the compressor activation condition is satisfied while blower motor is activated, A/C auto amp. trans-

mits A/C ON signal and blower fan ON signal to BCM.

• BCM transmits the A/C ON signal and blower fan ON signal to ECM via CAN communication line. Refer to

BCS-12, "SIGNAL BUFFER SYSTEM : 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 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 A/C AUTO AMP.

Low Temperature Protection Control

When intake sensor detects that evaporator fin temperature is 2

°

C

(36

°

F) or less, A/C auto amp. requests ECM to turn the compressor

OFF, and stops the compressor.

When the air temperature returns to 3.5

°

C (38

°

F) or more, the com-

pressor is activated.

JMIIA1227GB

JMIIA0711GB

JMIIA1055GB

Revision: November 2015

2016 JUKE

HAC-16

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

SYSTEM

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:0000000012200015

DOOR MOTOR CONTROL

• A/C auto amp. receives the detection data from each sensor.

• Intake door motor, when receiving control signal from A/C auto amp. moves intake door to the appropriate

position based on the door position detection signal of each PBR (Potentio Balance Resistor).

• Each motor of air mix and mode, when receiving drive signal from A/C auto amp., moves each door to the

appropriate position according to drive signal.

DRIVE METHOD OF STEPPING MOTOR TYPE MOTOR

• Stepping motor type motor is driven by 4 pieces of drive coil that are sequentially excited.

• Direction of rotation is changeable by recomposing pattern of excitation.

SWITCH AND THEIR CONTROL FUNCTION

SJIA0971E

Revision: November 2015

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SYSTEM

HAC-17

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

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*: Models for Canada

1.

Intake door

2.

Blower motor

3.

In-cabin microfilter 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

*

Switch/dial position

Door position

Ce

nt

er

ve

nt

ila

to

r an

d d

ef

ros

ter do

or

Su

b d

ef

ros

ter

do

or

Si

de

ve

nt

ila

tor do

or

Fo

ot

do

or

In

ta

ke

do

or

Up

pe

r ai

r mi

x

do

or

L

owe

r ai

r mi

x

do

or

AUTO switch

AUTO

JPIIA1584ZZ

Revision: November 2015

2016 JUKE

HAC-18

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

SYSTEM

AIR DISTRIBUTION

Models except for Canada

Models for Canada

MODE switch

VENT

P

M

L

G

—

—

—

B/L

N

K

H

FOOT

Q

O

J

I

D/F

N

DEF switch

M

G

Intake switch

—

—

—

—

A

B

Temperature control dial

Full cold

18

°

C (60

°

F)

—

D

E

18.5

°

C (61

°

F) –

31.5

°

C (89

°

F)

AUTO

AUTO

Full hot

32

°

C (90

°

F)

C

F

OFF switch

Q

O

J

I

B

—

—

Switch/dial position

Door position

Ce

nte

r v

en

tila

to

r an

d

de

fros

te

r do

or

Su

b de

fr

os

te

r do

or

Si

de

v

ent

ila

to

r do

or

Fo

ot

do

or

In

ta

ke

do

or

Up

pe

r ai

r mi

x do

or

Lo

we

r ai

r mi

x do

or

Discharge air flow

MODE/DEF setting po-

sition

Air outlet/distribution

Ventilator

Foot

Defroster

Center

Side

52.6%

47.3%

—

—

34.0%

27.7%

38.4%

—

—

19.1%

57.9%

23.0%

—

13.5%

42.4%

44.1%

—

16.3%

—

83.8%

Discharge air flow

MODE/DEF setting

position

Air outlet/distribution

Ventilator

Foot

Defroster

Center

Side

Front

Rear

52.6%

47.3%

—

—

—

28.2%

25.9%

29.6%

16.3%

—

—

16.3%

43.0%

21.0%

19.7%

Revision: November 2015

2016 JUKE

SYSTEM

HAC-19

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

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ECO Mode Control

INFOID:0000000012200016

DESCRIPTION

• A/C auto amp. receives operation status of each switch (A/C operation signal), D-MODE setting status (ECO

mode signal), and “CLIMATE ECO” setting status (A/C ECO setting signal) from multi display unit via CAN

communication.

• A/C auto amp. operates air conditioning system in ECO mode, when D-MODE on multi display unit is set to

ECO mode while air conditioning system is in automatic control.

NOTE:

• For setting procedure of D-MODE, refer to

AV-203, "INTEGRATED CONTROL SYSTEM : System

Description"

.

• Activation or deactivation of ECO mode can be changed using multi display unit setting function (“CLI-

MATE ECO”). For setting procedure, refer to

AV-203, "INTEGRATED CONTROL SYSTEM : System

Description"

.

CONTROL OUTLINE

During ECO mode operation, A/C auto amp. changes air flow and control characteristics of air inlet, within a

range that may not spoil the comfort level, lowers operation ratio of compressor, and reduces the electrical

load. This reduces engine load and improved fuel economy. Refer to the following items for details of each

control.

Air Flow Control

• A/C auto amp. increases voltage to power transistor gate compared to ordinary operation and reduces volt-

age to blower motor. This reduces air flow.

• Since air flow is reduced, the amount of air that passes evaporator is reduced. Increase of evaporator tem-

perature can be moderated. Evaporator temperature is easily shifted to temperature control range for low

temperature protection control. Operation ratio of evaporator is reduced.

• Since air flow is reduced, the electrical load is reduced. Alternator power output can be moderated.

Air Inlet Control

• In the following conditions, A/C auto amp. controls air inlet and increases recirculation air mixing ratio com-

pared to ordinary operation.

- Ambient temperature: 25

°

C (77

°

F) or more

- Temperature setting: Any temperature other than full cold [18

°

C (60

°

F)] or full hot [32

°

C (90

°

F)]

- Air outlet: In automatic control

- Air flow: In automatic control

- Air inlet: In automatic control or in fresh air intake mode by manual control

- A/C switch: ON

• By increasing recirculation air mixing ratio, cooled air in passenger room is circulated in larger amount than

during ordinary operation. Air temperature blowing to evaporator is maintained at a low level. Evaporator

temperature increase can be moderated. Evaporator temperature is easily shifted to temperature control

range for low temperature protection control. Operation ratio of evaporator is reduced.

Fail-safe

INFOID:0000000012963107

FAIL-SAFE FUNCTION

If a communication error exists between the A/C auto amp. and multi display unit for 2 seconds or longer, air

conditioning is controlled under the following conditions:

—

12.2%

33.1%

16.3%

38.4%

—

16.3%

—

—

83.8%

Discharge air flow

MODE/DEF setting

position

Air outlet/distribution

Ventilator

Foot

Defroster

Center

Side

Front

Rear

A/C display

: OFF

Set temperature

: Setting before communication error occurs

Air outlet

: Automatic control

Revision: November 2015

2016 JUKE

HAC-20

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

SYSTEM

Air flow

: Automatic control

Air inlet

: Fresh air intake (FRE)

A/C switch

: ON

Revision: November 2015

2016 JUKE