Nissan Juke (2012 year). Service Repair Manual

HAC-98

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

COMPONENT PARTS

BCM

INFOID:0000000007577663

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:0000000007577664

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:0000000007577665

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:0000000007577666

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:0000000007577667

Compressor is driven by the magnet clutch which is magnetized by electric power supply.

PBIB2657E

Revision: 2011 October

2012 JUKE

SYSTEM

HAC-99

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

HAC

SYSTEM

System Diagram

INFOID:0000000007577668

System Description

INFOID:0000000007577669

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-99, "Compressor Control"

CONTROL BY BCM

HAC-99, "Compressor Control"

CONTROL BY ECM

•

HAC-99, "Compressor Control"

• Cooling fan control: Refer to

EC-54, "COOLING FAN CONTROL : System Description"

CONTROL BY IPDM E/R

•

HAC-99, "Compressor Control"

• Cooling fan control: Refer to

PCS-38, "POWER CONTROL SYSTEM : System Description"

Compressor Control

INFOID:0000000007577670

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-89, "SIGNAL BUFFER SYSTEM : System Description"

NOTE:
Compressor operational condition
• A/C switch signal ON or defroster position signal ON

JMIIA1241GB

Revision: 2011 October

2012 JUKE

HAC-100

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

SYSTEM

• 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-35, "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

, 452.4 psi) or more (When the engine speed is less than 1,500 rpm)

• 2.74 MPa (27.95 kg/cm

, 397.3 psi) or more (When the engine speed is 1,500 rpm or more)

• 0.14 MPa (1.43 kg/cm

, 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-52, "AIR CONDITIONING CUT CONTROL : System Description"

Door Control

INFOID:0000000007577671

SWITCHES AND THEIR CONTROL FUNCTIONS

JMIIA1055GB

Revision: 2011 October

2012 JUKE

SYSTEM

HAC-101

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

HAC

*: Models for Canada

Intake door

Blower motor

Air conditioner filter

Evaporator

Upper air mix door

Lower air mix door

Heater core

Foot door

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

Revision: 2011 October

2012 JUKE

HAC-102

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

SYSTEM

AIR DISTRIBUTION

Models except for Canada

Models for Canada

Dial/Lever position

Door position

r v

til

r a

ost

fros

r do

til

ot doo

r a

ir m

Lowe

r a

ir m

MODE dial

—

Intake lever

—

Temperature control dial

Full cold

—

Full hot

Discharge air flow

MODE dial position

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 dial 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%

—

12.2%

33.1%

16.3%

38.4%

—

16.3%

—

83.8%

Revision: 2011 October

2012 JUKE

OPERATION

HAC-103

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

HAC

OPERATION

Switch Name and Function

INFOID:0000000007577672

A/C CONTROLLER (A/C CONTROL)

MODE dial

Fan control dial

A/C switch

Temperature control dial

Intake lever

MODE dial

• Mode position is selected to an optimal position by operating this dial.
• When D/F or DEF is selected while blower motor is activated, the compressor (A/C switch indicator)

automatically turns ON.

Fan control dial

Fan speed can be adjusted within a range from 1st to 4th.

A/C switch

The compressor control (A/C switch indicator) is turned ON

⇔

OFF each time by pressing this switch

while the blower motor is activated.

Temperature control dial

The setting temperature can be selected to an optimum temperature by operating this dial.
• Clockwise rotation: Discharge air flow temperature increases
• Counterclockwise rotation: Discharge air flow temperature decreases.

Intake lever

The air inlet changes REC

⇔

FRE each time by operation this lever.

JMIIA1242ZZ

Revision: 2011 October

2012 JUKE

HAC-104

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

DIAGNOSIS SYSTEM (BCM)

DIAGNOSIS SYSTEM (BCM)

Description

INFOID:0000000007577673

Air conditioning system performs self-diagnosis, operation check, function diagnosis, and various settings
using diagnosis function of each control unit.

COMMON ITEM

COMMON ITEM : CONSULT Function (BCM - COMMON ITEM)

INFOID:0000000007820641

APPLICATION ITEM

CONSULT performs the following functions via CAN communication with BCM.

SYSTEM APPLICATION

BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.

: Applicable item

ECU

Diagnostic item

(CONSULT)

BCM

BCM-AIR CONDITIONER

Self Diagnostic Result

Data Monitor

Active Test

ECM

ENGINE

Self Diagnostic Result

Data Monitor

IPDM E/R

Self Diagnostic Result

Data Monitor

Auto active test

Diagnosis mode

Function Description

Work Support

Changes the setting for each system function.

Self Diagnostic Result

Displays the diagnosis results judged by BCM.

CAN Diag Support Monitor

Monitors the reception status of CAN communication viewed from BCM.

Data Monitor

The BCM input/output signals are displayed.

Active Test

The signals used to activate each device are forcibly supplied from BCM.

Ecu Identification

The BCM part number is displayed.

Configuration

• Read and save the vehicle specification.
• Write the vehicle specification when replacing BCM.

System

Sub system selection item

Diagnosis mode

Work Support

Data Monitor

Active Test

Door lock

DOOR LOCK

Rear window defogger

REAR DEFOGGER

Warning chime

BUZZER

Interior room lamp control

INT LAMP

Remote keyless entry system

MULTI REMOTE ENT

Exterior lamp

HEAD LAMP

Wiper and washer

WIPER

Turn signal and hazard warning lamps

FLASHER

Air conditioning system

AIR CONDITONER

Combination switch

COMB SW

Revision: 2011 October

2012 JUKE

DIAGNOSIS SYSTEM (BCM)

HAC-105

< SYSTEM DESCRIPTION >

[MANUAL AIR CONDITIONING]

HAC

AIR CONDITIONER

AIR CONDITIONER : CONSULT Function (BCM - AIR CONDITIONER) (Manual A/C)

INFOID:0000000007577675

DATA MONITOR

Display item list

ACTIVE TEST

Body control system

BCM

NATS

IMMU

Interior room lamp battery saver

BATTERY SAVER

Back door open

TRUNK

Theft warning alarm

THEFT ALM

RAP system

RETAINED PWR

Signal buffer system

SIGNAL BUFFER

Panic alarm

PANIC ALARM

TPMS

AIR PRESSUE MONITOR

System

Sub system selection item

Diagnosis mode

Work Support

Data Monitor

Active Test

Monitor Item [Unit]

Contents

FAN ON SIG

[On/Off]

Displays blower motor status as judged from blower fan ON signal.

AIR COND SW

[On/Off]

Displays A/C switch status as judged from A/C switch signal.

THERMO AMP

[On/Off]

Displays thermo control amp. status as judged from thermo control amp. signal.

IGN SW

[On/Off]

Displays ignition switch position status as judged form ignition switch signal.

FR DEF SW

[On/Off]

Displays the D/F or DEF status as judged from defroster position signal.

Test item

Operation

Description

A/C INDICATOR

A/C indicator is turned ON.

Off

A/C indicator is turned OFF.

Revision: 2011 October

2012 JUKE

MANUAL AIR CONDITIONING SYSTEM

HAC-107

< WIRING DIAGRAM >

[MANUAL AIR CONDITIONING]

HAC

WIRING DIAGRAM

MANUAL AIR CONDITIONING SYSTEM

Wiring Diagram

INFOID:0000000007577677

For connector terminal arrangements, harness layouts, and alphabets in a

(option abbreviation; if not

described in wiring diagram), refer to

GI-12, "Connector Information"

JCIWA0540GB

Revision: 2011 October

2012 JUKE

DIAGNOSIS AND REPAIR WORK FLOW

HAC-109

< BASIC INSPECTION >

[MANUAL AIR CONDITIONING]

HAC

GET INFORMATION FOR SYMPTOM

Get detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurs).

Check operation condition of the function that is malfunctioning.

>> GO TO 2.

CHECK DTC

Check DTC.

Perform the following procedure if DTC is detected.

Record DTC and freeze frame data (Print them out using CONSULT.)

Erase DTC.

Study the relationship between the cause detected by DTC and the symptom described by the customer.

Check related service bulletins for information.

Are any symptoms described and any DTC detected?

Symptom is described, DTC is detected>>GO TO 3.
Symptom is described, DTC is not detected>>GO TO 4.
Symptom is not described, DTC is detected>>GO TO 5.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer.
Also study the normal operation and fail-safe related to the symptom.
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 5.

CONFIRM THE SYMPTOM

Try to confirm the symptom described by the customer.
Verify relation between the symptom and the condition when the symptom is detected.

>> GO TO 6.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC CONFIRMATION PROCEDURE for the detected DTC, and then check that DTC is detected
again. At this time, always connect CONSULT to the vehicle, and check self diagnostic results in real time.
If two or more DTCs are detected, refer to DTC INSPECTION PRIORITY CHART, and determine trouble diag-
nosis order.
NOTE:
• Freeze frame data is useful if the DTC is not detected.
• Perform Component Function Check if DTC CONFIRMATION PROCEDURE is not included on Service

Manual. This simplified check procedure is an effective alternative though DTC cannot be detected during
this check.
If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC CONFIR-
MATION PROCEDURE.

Is DTC detected?

YES

>> GO TO 7.

>> Check according to

GI-43, "Intermittent Incident"

DETECT MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS

Detect malfunctioning system according to SYMPTOM DIAGNOSIS based on the confirmed symptom in step
4, and determine the trouble diagnosis order based on possible causes and symptom.

Is the symptom described?

YES

>> GO TO 7.

>> Monitor input data from related sensors or check voltage of related module terminals using CON-

SULT.

DETECT MALFUNCTIONING PART BY DIAGNOSIS PROCEDURE

Revision: 2011 October

2012 JUKE

HAC-110

< BASIC INSPECTION >

[MANUAL AIR CONDITIONING]

DIAGNOSIS AND REPAIR WORK FLOW

Inspect according to Diagnosis Procedure of the system.

Is malfunctioning part detected?

YES

>> GO TO 8.

>> Check according to

GI-43, "Intermittent Incident"

REPAIR OR REPLACE THE MALFUNCTIONING PART

Repair or replace the malfunctioning part.

Reconnect parts or connectors disconnected during Diagnosis Procedure again after repair and replace-
ment.

Check DTC. If DTC is detected, erase it.

>> GO TO 9.

FINAL CHECK

When DTC is detected in step 2, perform DTC CONFIRMATION PROCEDURE again, and then check that the
malfunction is repaired securely.
When symptom is described by the customer, refer to confirmed symptom in step 3 or 4, and check that the
symptom is not detected.

Is DTC detected and does symptom remain?

YES-1 >> DTC is detected: GO TO 7.
YES-2 >> Symptom remains: GO TO 4.
NO

>> Before returning the vehicle to the customer, always erase DTC.

Revision: 2011 October

2012 JUKE

OPERATION INSPECTION

HAC-111

< BASIC INSPECTION >

[MANUAL AIR CONDITIONING]

HAC

OPERATION INSPECTION

Work Procedure

INFOID:0000000007577679

The purpose of the operational check is to check that the individual system operates normally.

CHECK BLOWER MOTOR

Operate fan control dial.

Check that fan speed changes. Check operation for all fan speeds.

Is the inspection result normal?

YES

>> GO TO 2.

>> GO TO 8.

CHECK DISCHARGE AIR

Operate fan control dial to set the fan speed to maximum speed.

Operate MODE dial to each position.

Check that air outlets change according to each indicated air outlet by placing a hand in front of the air
outlets. Refer to

VTL-4, "System Description"

Is the inspection result normal?

YES

>> GO TO 3.

>> GO TO 8.

CHECK INTAKE AIR

Operate intake lever to each position.

Listen to intake sound and confirm air inlets change.

Is the inspection result normal?

YES

>> GO TO 4.

>> GO TO 8.

CHECK COMPRESSOR

Press A/C switch. The A/C switch indicator is turns ON.

Check visually and by sound that the compressor operates.

Press A/C switch again. The A/C switch indicator is turns OFF.

Check that compressor stops.

Operate MODE dial to D/F or DEF position. A/C switch indicator is turns ON.

Check visually and by sound that the compressor operates.

Is the inspection result normal?

YES

>> GO TO 5.

>> GO TO 8.

CHECK DISCHARGE AIR TEMPERATURE

Operate temperature control dial.

Check that discharge air temperature changes.

Is the inspection result normal?

YES

>> GO TO 6.

>> GO TO 8.

CHECK TEMPERATURE DECREASE

Operate compressor.

Turn temperature control dial to full cold position.

Check that cool air blows from the air outlets.

Is the inspection result normal?

YES

>> GO TO 7.

>> GO TO 8.

Check condition

: Engine running at normal operating temperature.

Revision: 2011 October

2012 JUKE

HAC-112

< BASIC INSPECTION >

[MANUAL AIR CONDITIONING]

OPERATION INSPECTION

CHECK TEMPERATURE INCREASE

Turn temperature control dial to full hot position.

Check that warm air blows from air outlets.

Is the inspection result normal?

YES

>> INSPECTION END

>> GO TO 8.

CHECK SELF-DIAGNOSIS WITH CONSULT

Perform self-diagnosis with CONSULT.

Check that any DTC is detected.

Is any DTC detected?

YES

>> Perform trouble diagnosis for the detected DTC.

>> Refer to

HAC-128, "Symptom Table"

and perform the appropriate diagnosis.

Revision: 2011 October

2012 JUKE

A/C SWITCH

HAC-113

< DTC/CIRCUIT DIAGNOSIS >

[MANUAL AIR CONDITIONING]

HAC

DTC/CIRCUIT DIAGNOSIS

A/C SWITCH

Component Function Check

INFOID:0000000007577680

CHECK A/C ON SIGNAL

With CONSULT

Turn ignition switch ON.

Select “AIR CONDITIONER” of “BCM” using CONSULT.

Select “AIR COND SW” in “DATA MONITOR” mode, and check status under the following condition.

Is the inspection result normal?

YES

>> INSPECTION END

>> Refer to

HAC-113, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000007577681

CHECK A/C SWITCH POWER SUPPLY

Turn ignition switch OFF.

Disconnect A/C control connector.

Turn ignition switch ON.

Check output waveform between A/C control harness connector and ground with using oscilloscope.

Is the inspection result normal?

YES

>> GO TO 2.

>> GO TO 3.

CHECK A/C SWITCH GROUND CIRCUIT FOR OPEN

Turn ignition switch OFF.

Check continuity between A/C control harness connector and ground.

Is the inspection result normal?

YES

>> Replace A/C control. Refer to

HAC-134, "Removal and Installation"

>> Repair harness or connector.

CHECK A/C SWITCH POWER SUPPLY CIRCUIT FOR OPEN

Monitor item

Condition

Status

AIR COND SW

A/C switch

While pushing

While not pushing

Off

−

Output waveform

A/C control

Connector

Terminal

M53

Ground

JPMIA0012GB

A/C control

—

Continuity

Connector

Terminal

M53

Ground

Existed

Revision: 2011 October

2012 JUKE

Nissan Juke (2012 year). Service Repair Manual - part 145