2011 INFINITI QX56 ECO mode

OPERATIONHAC-37
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING]
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Switch Operation
ACCS (ADVANCED CLIMATE CONTROL SYSTEM)
ACCS (ADVANCED CLIMATE CONTROL SY
STEM) : Switch Name and Function
INFOID:0000000006275883
OPERATION AND DISPLAY
Plasmacluster™ ion display
 Plasmacluster™ control state is indicated on the front display.
 Plasmacluster
™ ion display is switched as shown in the figure depending on air flow.
NOTE:
 Plasmacluster
™ ion technology developed by Sharp Corporation is installed in this item.
 Plasmacluster
™ is a trademark of Sharp Corporation.
1. OFF switch 2. Fan switch 3. Display
4. Temperature control switch 5. MODE switch 6. AUTO switch
JMIIA0718ZZ
AUTO switch Turns the switch indicator lamp and "AUTO" indicator on the display ON, and then rear air condition-
ing system becomes the following state.
 Air outlet: Automatic control
 Blower fan: Automatic control
 Compressor: ON
Fan switch (UP/DOWN) Blower fan speed is manually controlled with these switches. Seven speeds are available for manual
control (as shown on the display screen)
NOTE:
When fan switch is pressed while air conditioning system is in automatic control (“AUTO” is indicated),
automatic control is rele
ased (“AUTO” turns OFF).
MODE switch Selects air outlet sequentially from VENT
⇒ B/L ⇒ FOOT ⇒ VENT each time.
NOTE:
When MODE switch is pressed while air conditioning system is in automatic control (“AUTO” is indi-
cated), automatic control is released (“AUTO” turns OFF).
OFF switch  Turns rear air conditioning system OFF.
 When rear air conditioning system turns OFF, air outlet become the automatic control.
Temperature control
switch Setting temperature is selected using this switch with in a range between 18.0
°C (60 °F) – 32.0 °C
(90 °F) at a rate of 0.5 °C (1.0 °F) per adjustment.
 : Press: Set temperature increases.
 : Press: Set temperature decreases.
Revision: 2010 May2011 QX56

HAC-38
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONING]
OPERATION
- When air flow is small
- When air flow is large
Controller (Preset Switch)
JMIIA0410ZZ
JMIIA0411ZZ
1. Auto intake switch
Switch name Function
Auto intake switch  Automatic intake control (exhaust gas / outside odor detecting mechanism) mode (switch indicator)
changes between ON ⇔ OFF each time when auto intake switch is pressed while front blower mo-
tor is activated.
 When auto intake switch turns ON, front air conditioning system becomes the following status.
- A/C switch: ON
- Air inlet: Recirculation [After approximately 5 minutes, air inlet is switched to automatic intake con- trol (exhaust gas / outside odor detecting mechanism).]
 When auto intake switch turns ON ⇒ OFF, air inlet becomes the fresh air intake.
NOTE:
 Interlocking condition of A/C switch can be changed. Refer to HAC-70, "
ACCS (ADVANCED CLI-
MATE CONTROL SYSTEM) : Auto Intake Switch Interlocking Movement Change Function".
 Auto intake switch does not turn ON during the following status.
- Air outlet: DEF
- Ambient temperature: −2 °C (28 °F) or less
JMIIA0826ZZ
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (HVAC)HAC-39
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING]
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DIAGNOSIS SYSTEM (HVAC)
DescriptionINFOID:0000000006275884
Air conditioning system performs self-diagnosis, operat ion check, function diagnosis, and various settings
using diagnosis function of each control unit.
CONSULT-III FunctionINFOID:0000000006275885
CONSULT-III performs the following functions via CAN communication with A/C auto amp.
NOTE:
Diagnosis should be performed with engine running. D oor motor operation speeds become slower and NO
results may be returned even for normal operation if battery voltage drops below 12 V during self-diagnosis.
SELF-DIAGNOSIS RESULTS
Refer to HAC-45, "DTC Index".
DATA MONITOR
Display item list
ECU Diagnostic item
(CONSULT-III)
A/C auto amp. HVACSelf Diagnostic Result
Data Monitor
Active Test
Work support
AV c o n t r o l u n i t MULTI AV
Self Diagnostic Result
Multi AV system on board diagnosis function
ECM ENGINESelf Diagnostic Result
Data Monitor
IPDM E/R IPDM E/RSelf Diagnostic Result
Data Monitor
Auto active test
Diagnostic mode Description
Self diagnostic result Displays the diagnosis results judged by A/C auto amp.
Data monitor Displays the input/output signal of A/C auto amp.
Active test The signals used to activate each device are forcibly supplied from A/C auto amp.
Work support Changes the setting for each setting function.
ECU identification Displays the part number of A/C auto amp.
Monitor item [Unit] Description
AMB TEMP SEN [ °C ( °F)] Ambient sensor value converted from ambient sensor signal received from ambient sen-
sor
IN-VEH TEMP [ °C ( °F)] Front in-vehicle sensor value converted from front in-vehicle sensor signal received from
front in-vehicle sensor
INT TEMP SEN [ °C ( °F)] Intake sensor value converted from intake sensor signal received from intake sensor
SUNLOAD SEN [w/m
2]Sunload sensor value converted from sunload sensor signal (driver side) received from
sunload sensor
AMB SEN CAL [ °C ( °F)] Ambient temperature value calculated by A/C auto amp.
IN-VEH CAL [ °C ( °F)] In-vehicle temperature (front side) value calculated by A/C auto amp.
INT TEMP CAL [ °C ( °F)] Front evaporator fin temperature value calculated by A/C auto amp.
SUNL SEN CAL [w/m
2]Sunload value (driver side) calculated by A/C auto amp.
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (HVAC)HAC-41
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING]
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*: With ACCS (advanced climate control system)
NOTE:
Perform the inspection of each output device after starting the engine because the compressor is operated.
WORK SUPPORT
*: With ACCS (advanced climate control system)
NOTE:
When the battery cable is disconnected from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of WORK SUPPORT may be cancelled.
Rear A/C relay ON ON ON ON OFF OFF ON
Ionizer
*ON ON ON ON ON ON OFF
Front display (Ion mode)
*CLEAN CLEAN QUICK
CLEAN QUICK
CLEAN QUICK
CLEAN QUICK
CLEAN OFF
Te s t i t e m
MODE 1 MODE 2 MODE 3 MODE 4 MODE 5 MODE 6 MODE 7
Work item Description Refer to
TEMP SET CORRECT Setting change of temperature setting trimmer (front) can be per-
formed. HAC-68, "
FRONT AUTO-
MATIC AIR CONDITION-
ING SYSTEM :
Temperature Setting Trim-
mer (Front)"
BLOWER SET Setting change of foot position setting trimmer can be performed.
HAC-68, "
FRONT AUTO-
MATIC AIR CONDITION-
ING SYSTEM : Foot
Position Setting Trimmer"
REC MEMORY SET
Setting change of inlet port memory function (REC) can be per-
formed. HAC-69, "
FRONT AUTO-
MATIC AIR CONDITION-
ING SYSTEM : Inlet Port
Memory Function (REC)"
FRE MEMORY SET
Setting change of inlet port memory function (FRE) can be per-
formed. HAC-69, "
FRONT AUTO-
MATIC AIR CONDITION-
ING SYSTEM : Inlet Port
Memory Function (FRE)"
GAS SENSOR ADJUSTMENT*Setting change of exhaust gas / outside odor detecting sensor sensi-
tivity adjustment function can be performed. HAC-70, "
ACCS (AD-
VANCED CLIMATE CON-
TROL SYSTEM) :
Exhaust Gas / Outside
Odor Detecting Sensor
Sensitivity Adjustment
Function"
CLEAN SW SET*Setting change of auto intake switch interlocking movement change
function can be performed.
HAC-70, "
ACCS (AD-
VANCED CLIMATE CON-
TROL SYSTEM) : Auto
Intake Switch Interlocking
Movement Change Func-
tion"
REAR TEMP SET CORRECT
Setting change of temperature setting trimmer (rear) can be per-
formed. HAC-68, "
FRONT AUTO-
MATIC AIR CONDITION-
ING SYSTEM :
Temperature Setting Trim-
mer (Front)"
Revision: 2010 May2011 QX56

HAC-68
< BASIC INSPECTION >[AUTOMATIC AIR CONDITIONING]
SYSTEM SETTING
SYSTEM SETTING
FRONT AUTOMATIC AIR CONDITIONING SYSTEM
FRONT AUTOMATIC AIR CONDITIONING SYST
EM : Temperature Setting Trimmer
(Front)
INFOID:0000000006275896
DESCRIPTION
If the temperature felt by the customer is different from the front air flow temperature controlled by the temper-
ature setting, the A/C auto amp. control temperature can be adjusted to compensate for the temperature set-
ting.
HOW TO SET
With CONSULT-III
Perform “TEMP SET CORRECT” of HVAC work support item.
NOTE:
 When −3.0 °C ( −6 °F) is corrected on the temperature setting set as 25.0 °C (77 °F) the temperature controlled
by A/C auto amp. is 25.0 °C (77 °F) −3.0 °C ( −6 °F) = 22.0 °C (72 °F) and the temperature becomes lower than
the temperature setting.
 When the battery cable is disconnected from the negativ e terminal or when the battery voltage becomes 10
V or less, the setting of the difference between t he set temperature and control temperature may be can-
celled.
FRONT AUTOMATIC AIR CONDITIONING SYSTEM : Foot Position Setting Trimmer
INFOID:0000000006275897
DESCRIPTION
In FOOT mode, the air blowing to DEF can change ON/OFF.
HOW TO SET
With CONSULT-III
Perform the “BLOW SET” of HVAC work support item.
Work support items Display ( °C) Display ( °F)
TEMP SET CORRECT 3.0 6
2.5 5
2.0 4
1.5 3
1.0 2
0.5 1
0 (initial status) 0 (initial status) −0.5 −1
− 1.0 −2
− 1.5 −3
− 2.0 −4
− 2.5 −5
− 3.0 −6
Work support items Display Defroster door position
Auto control Manual control
BLOW SET Mode1 OPEN CLOSE
Mode2 (initial status) OPEN OPEN
Mode3 CLOSE OPEN
Mode4 CLOSE CLOSE
Revision: 2010 May2011 QX56

SYSTEM SETTINGHAC-69
< BASIC INSPECTION > [AUTOMATIC AIR CONDITIONING]
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NOTE:
When the battery cable is disconnect ed from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of the discharge air mix ratio in FOOT mode may be cancelled.
FRONT AUTOMATIC AIR CONDITIONING SYS TEM : Inlet Port Memory Function
(FRE)
INFOID:0000000006275898
DESCRIPTION
 If the ignition switch is turned to the OFF position while t he intake switch is set to OFF (fresh air intake), “Per-
form the memory” or “Do not perform the memory” of in take switch OFF (fresh air intake) condition can be
selected.
 If “Perform the memory” was set, the intake switch will be OFF (fresh air intake) when turning the ignition
switch to the ON position again.
 If “Do not perform the memory” was set, the air inlets will be controlled automatically when turning the igni-
tion switch to the ON position again.
HOW TO SET
With CONSULT-III
Perform the “FRE MEMORY SET” of HVAC work support item.
NOTE:
When the battery cable is disconnect ed from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of the FRE memory function may be cancelled.
FRONT AUTOMATIC AIR CONDITIONING SYS TEM : Inlet Port Memory Function
(REC)
INFOID:0000000006275899
DESCRIPTION
 If the ignition switch is turned to the OFF position while the intake switch is set to ON (recirculation), “Per-
form the memory” or “Do not perform the memory” of intake switch ON (recirculation) condition can be
selected.
 If “Perform the memory” was set, the intake switch will be ON (recirculation) when turning the ignition switch
to the ON position again.
 If “Do not perform the memory” was set, the air inlets will be controlled automatically when turning the igni-
tion switch to the ON position again.
HOW TO SET
With CONSULT-III
Perform the “REC MEMORY SET” of HVAC work support item.
NOTE:
When the battery cable is disconnect ed from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of the REC memory function may be cancelled.
REAR AUTOMATIC AIR CONDITIONING SYSTEM
REAR AUTOMATIC AIR CONDITIONING SYST EM : Temperature Setting Trimmer
(Rear)
INFOID:0000000006275900
DESCRIPTION
Work support items Display Setting
FRE MEMORY SET WITHOUT Perform the memory of manual FRE
WITH (initial status) Do not perform the memory of manual FRE (auto control)
Work support items Display Setting
REC MEMORY SET WITHOUT (initial status) Perform the memory of manual REC
WITH Do not perform the memory of manual REC (auto control)
Revision: 2010 May2011 QX56

SYSTEM SETTINGHAC-71
< BASIC INSPECTION > [AUTOMATIC AIR CONDITIONING]
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Movement Change FunctionINFOID:0000000006275902
DESCRIPTION
Condition for interlocking movement of auto intake switch and A/C switch can be changed. In addition opera-
tion of the auto intake switch, which activates the aut omatic intake control (exhaust gas / outside odor detect-
ing mechanism), can be set to become available when the A/C switch is ON.
HOW TO SET
With CONSULT-III
Perform the “CLEAN SW SET” of HVAC work support item.
NOTE:
When the battery cable is disconnect ed from the negative terminal or when the battery voltage becomes 10 V
or less, the setting of WO RK SUPPORT may be cancelled.
Work support items Display Setting
CLEAN SW SET Mode1 Initial setting
Mode2 Setting 1
Mode3 Setting 2
Mode4 Setting 3
Initial setting
When the auto intake switch is ON, the A/C switch is al
so turned ON in synchronization with the auto intake
switch.
Control of the auto intake switch is function al even when the A/C switch is turned OFF.
Setting 1 When the auto intake switch is ON, the A/C switch is
not turned ON in synchronization with the auto intake
switch.
Control of the auto intake switch is function al even when the A/C switch is turned OFF.
Setting 2 When the auto intake switch is ON, the A/C switch is al
so turned ON in synchronization with the auto intake
switch.
When the A/C switch is turned OFF, the auto intake switch is turned OFF in synchronization with the A/C
switch.
Setting 3 Auto intake switch can be turned ON only when A/C switch is ON.
When the A/C switch is turned OFF, the auto intake switch is turned OFF in synchronization with the A/C
switch.
Revision: 2010 May2011 QX56

FRONT BLOWER MOTORHAC-121
< DTC/CIRCUIT DIAGNOSIS > [AUTOMATIC AIR CONDITIONING]
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FRONT BLOWER MOTOR
Diagnosis ProcedureINFOID:0000000006275968
1.CHECK FUSE
1. Turn ignition switch OFF.
2. Check 15A fuse [No. 21 and 22, located in fuse block (J/B)]. NOTE:
Refer to PG-140, "
Fuse, Connector and Terminal Arrangement".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.CHECK FRONT BLOWER MOTOR POWER SUPPLY
1. Disconnect front blower motor connector.
2. Turn ignition switch ON.
3. Check voltage between front blower motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 6.
3.CHECK FRONT BLOWER MOTOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between front blower motor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair harness or connector.
4.CHECK FRONT BLOWER MOTOR CONTROL SIGNAL CIRCUIT
1. Disconnect A/C auto amp. connector.
2. Check continuity between front blower motor harness connector and A/C auto amp. harness connector.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair the harness or connector.
5.CHECK FRONT BLOWER MOTOR CONTROL SIGNAL
1. Reconnect front blower motor connector and A/C auto amp. connector.
2. Turn ignition switch ON.
3. Operate MODE switch to set air outlet to VENT.
4. Change fan speed from Lo to Hi, and check duty rati os between front blower motor harness connector
and ground by using an oscilloscope.
+
−Vol tag e
Front blower motor
Connector Terminal M272 1 Ground Battery voltage
Front blower motor —Continuity
Connector Terminal
M272 3 Ground Existed
Front blower motor A/C auto amp. Continuity
Connector Terminal Connector Terminal
M272 2 M50 14 Existed
Revision: 2010 May2011 QX56