Nissan Juke (2012 year). Service Repair Manual — part 145
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]
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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.
CONTROL BY BCM
CONTROL BY ECM
•
• Cooling fan control: Refer to
EC-54, "COOLING FAN CONTROL : System Description"
CONTROL BY IPDM E/R
•
• 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
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-52, "AIR CONDITIONING CUT CONTROL : System Description"
Door Control
INFOID:0000000007577671
SWITCHES AND THEIR CONTROL FUNCTIONS
JMIIA1055GB
Revision: 2011 October
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SYSTEM
HAC-101
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONING]
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*: 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
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
Ce
nt
e
r v
en
til
at
o
r a
nd
de
fr
ost
e
r
do
or
S
u
b
de
fros
te
r do
or
Si
de
v
en
til
at
o
r
do
or
Fo
ot doo
r
In
ta
k
e
do
or
Up
pe
r a
ir m
ix
do
or
Lowe
r a
ir m
ix
do
or
MODE dial
P
M
L
G
—
—
—
N
K
H
Q
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J
I
N
M
G
Intake lever
—
—
—
—
A
B
Temperature control dial
Full cold
—
D
E
Full hot
C
F
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]
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OPERATION
Switch Name and Function
INFOID:0000000007577672
A/C CONTROLLER (A/C CONTROL)
1.
MODE dial
2.
Fan control dial
3.
A/C switch
4.
Temperature control dial
5.
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
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]
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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
On
A/C indicator is turned ON.
Off
A/C indicator is turned OFF.
Revision: 2011 October
2012 JUKE
HAC-106
< ECU DIAGNOSIS INFORMATION >
[MANUAL AIR CONDITIONING]
BCM, ECM, IPDM E/R
ECU DIAGNOSIS INFORMATION
BCM, ECM, IPDM E/R
List of ECU Reference
INFOID:0000000007577676
ECU
Reference
BCM
BCS-122, "DTC Inspection Priority Chart"
ECM
EC-100, "DTC Inspection Priority Chart"
IPDM E/R
Revision: 2011 October
2012 JUKE
MANUAL AIR CONDITIONING SYSTEM
HAC-107
< WIRING DIAGRAM >
[MANUAL AIR CONDITIONING]
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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
HAC-108
< BASIC INSPECTION >
[MANUAL AIR CONDITIONING]
DIAGNOSIS AND REPAIR WORK FLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORK FLOW
Work Flow
INFOID:0000000007577678
OVERALL SEQUENCE
DETAILED FLOW
JMKIA8652GB
Revision: 2011 October
2012 JUKE
DIAGNOSIS AND REPAIR WORK FLOW
HAC-109
< BASIC INSPECTION >
[MANUAL AIR CONDITIONING]
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1.
GET INFORMATION FOR SYMPTOM
1.
Get detailed information from the customer about the symptom (the condition and the environment when
the incident/malfunction occurs).
2.
Check operation condition of the function that is malfunctioning.
>> GO TO 2.
2.
CHECK DTC
1.
Check DTC.
2.
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.
3.
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.
3.
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.
4.
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.
5.
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.
NO
>> Check according to
GI-43, "Intermittent Incident"
.
6.
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.
NO
>> Monitor input data from related sensors or check voltage of related module terminals using CON-
SULT.
7.
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.
NO
>> Check according to
GI-43, "Intermittent Incident"
.
8.
REPAIR OR REPLACE THE MALFUNCTIONING PART
1.
Repair or replace the malfunctioning part.
2.
Reconnect parts or connectors disconnected during Diagnosis Procedure again after repair and replace-
ment.
3.
Check DTC. If DTC is detected, erase it.
>> GO TO 9.
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]
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OPERATION INSPECTION
Work Procedure
INFOID:0000000007577679
The purpose of the operational check is to check that the individual system operates normally.
1.
CHECK BLOWER MOTOR
1.
Operate fan control dial.
2.
Check that fan speed changes. Check operation for all fan speeds.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 8.
2.
CHECK DISCHARGE AIR
1.
Operate fan control dial to set the fan speed to maximum speed.
2.
Operate MODE dial to each position.
3.
Check that air outlets change according to each indicated air outlet by placing a hand in front of the air
outlets. Refer to
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 8.
3.
CHECK INTAKE AIR
1.
Operate intake lever to each position.
2.
Listen to intake sound and confirm air inlets change.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 8.
4.
CHECK COMPRESSOR
1.
Press A/C switch. The A/C switch indicator is turns ON.
2.
Check visually and by sound that the compressor operates.
3.
Press A/C switch again. The A/C switch indicator is turns OFF.
4.
Check that compressor stops.
5.
Operate MODE dial to D/F or DEF position. A/C switch indicator is turns ON.
6.
Check visually and by sound that the compressor operates.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> GO TO 8.
5.
CHECK DISCHARGE AIR TEMPERATURE
1.
Operate temperature control dial.
2.
Check that discharge air temperature changes.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 8.
6.
CHECK TEMPERATURE DECREASE
1.
Operate compressor.
2.
Turn temperature control dial to full cold position.
3.
Check that cool air blows from the air outlets.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> 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
7.
CHECK TEMPERATURE INCREASE
1.
Turn temperature control dial to full hot position.
2.
Check that warm air blows from air outlets.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 8.
8.
CHECK SELF-DIAGNOSIS WITH CONSULT
1.
Perform self-diagnosis with CONSULT.
2.
Check that any DTC is detected.
Is any DTC detected?
YES
>> Perform trouble diagnosis for the detected DTC.
NO
>> Refer to
and perform the appropriate diagnosis.
Revision: 2011 October
2012 JUKE
A/C SWITCH
HAC-113
< DTC/CIRCUIT DIAGNOSIS >
[MANUAL AIR CONDITIONING]
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DTC/CIRCUIT DIAGNOSIS
A/C SWITCH
Component Function Check
INFOID:0000000007577680
1.
CHECK A/C ON SIGNAL
With CONSULT
1.
Turn ignition switch ON.
2.
Select “AIR CONDITIONER” of “BCM” using CONSULT.
3.
Select “AIR COND SW” in “DATA MONITOR” mode, and check status under the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Refer to
HAC-113, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000007577681
1.
CHECK A/C SWITCH POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect A/C control connector.
3.
Turn ignition switch ON.
4.
Check output waveform between A/C control harness connector and ground with using oscilloscope.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
CHECK A/C SWITCH GROUND CIRCUIT FOR OPEN
1.
Turn ignition switch OFF.
2.
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"
NO
>> Repair harness or connector.
3.
CHECK A/C SWITCH POWER SUPPLY CIRCUIT FOR OPEN
Monitor item
Condition
Status
AIR COND SW
A/C switch
While pushing
On
While not pushing
Off
+
−
Output waveform
A/C control
Connector
Terminal
M53
1
Ground
JPMIA0012GB
A/C control
—
Continuity
Connector
Terminal
M53
8
Ground
Existed
Revision: 2011 October
2012 JUKE
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