display INFINITI QX56 2011 Factory Service Manual

SYSTEMHAC-21
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING]
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*: Inlet status is displayed by indi cator when activating automatic control
AIR DISTRIBUTION
FRONT AUTOMATIC AIR CONDITIONIN G SYSTEM : Temperature Control
INFOID:0000000006275867
 When ignition switch is in the ON position, A/C auto amp. always
automatically controls temperatur e regardless of front air condi-
tioning operational state.
 A/C auto amp. calculates the target front air mix door opening angle depending on set temperature, in-vehicle temperature (front
side), ambient temperature, and sunload.
 Front air mix door is controlled depending on the comparison of current front air mix door opening angle and target front air mix
door opening angle.
 Regardless of in-vehicle temperature (front side), ambient temper- ature, and sunload, front air mix door is fixed at the fully cold posi-
tion when set temperature is 18.0 °C (60 °F), and at the fully hot
position when set temperature is 32.0 °C (90 °F).
FRONT AUTOMATIC AIR CONDITI ONING SYSTEM : Fail-safeINFOID:0000000006275868
FAIL-SAFE FUNCTION
Temperature
control dial
(Driver side) DUAL
switch:
OFF18.0
°C (60 °F) — C
18.5 °C (61 °F) ⇔
31.5 °C (89 °F) —AUTO
32.0 °C (90 °F) — D
Temperature control dial
(Driver side) DUAL
switch:
ON18.0
°C (60 °F) — C —
18.5 °C (61 °F) ⇔
31.5 °C (89 °F) —AUTO—
32.0 °C (90 °F) — D —
Temperature control dial
(Passenger
side) 18.0
°C (60 °F) — C
18.5 °C (61 °F) ⇔
31.5 °C (89 °F) —AUTO
32.0 °C (90 °F) — D
OFF switch AUTO —
Switch/Dial position
Door position
Ventilator door Foot
doorDefroster
door Intake
door Upper
ventilator door Air mix
door
(Driver side) Air mix
door
(Passen- ger
side)
Discharge air flow
Mode position Condition Air outlet/distribution
VENT FOOT DEF
Center Side Front Rear
DUAL and Up-
per ventilator
switch: OFF 50% 50% — — —
30% 30% 26% 14% —
— 14% 36% 23% 27%
— 12% 32% 20% 36%
—11%——89%
JMIIA0731GB
Revision: 2010 May2011 QX56

HAC-24
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONING]
SYSTEM
 A/C auto amp. controls passenger r
oom temperature so that the optimum level always matches the temper-
ature level that passenger may feel. Correction is applied to the target temperature that is set using temper-
ature control dial, according to ambient temperature detected by ambient sensor.
Rear in-vehicle sensor [in-vehicle temperature (rear side) correction]
 Passenger room temperature (rear side) detected by r ear in-vehicle sensor is corrected for each rear auto-
matic air conditioning control.
Intake sensor (intake temperature correction)
 A/C auto amp. performs correction to change recogniti on intake temperature of A/C auto amp. quickly when
difference is large between recognition intake temperat ure and intake temperature detected by intake tem-
perature sensor. The correction is performed to change recognition intake temperature slowly when differ-
ence is small.
Sunload sensor (sunload amount correction) Sunload amount detected by sunload sensor is correct ed for each rear automatic air conditioning control.
 A/C auto amp. performs correction to change recogni tion sunload amount of A/C auto amp. slowly when
sunload amount changes quickly, for exampl e when entering or exiting a tunnel.
 Front control
Operation by front controller
- Front A/C control (preset switch) transmits the co mmands for rear automatic air conditioning system opera-
tion to AV control unit via communication line, then AV control unit transmits the commands to A/C auto amp.
via CAN communication. A/C auto amp. transmits each indication information to AV control unit via CAN
communication. AV control unit displays each indication information that is received.
Operation by rear controller- Rear A/C control transmits the commands for rear automatic air conditioning system operation to A/C auto
amp. via communication line.
REAR AUTOMATIC AIR CONDITIONIN G SYSTEM : Air Flow ControlINFOID:0000000006275871
DESCRIPTION
 A/C auto amp. changes duty ratio of blower motor dr ive signal and controls air flow continuously. When air
flow is increased, duty ratio of rear blower moto r control signal 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-vehi cle temperature starting control and fan speed control at
door motor operation
AUTOMATIC AIR FLOW CONTROL
 A/C auto amp. decides target air flow depending on target rear air mix door opening angle.
 A/C auto amp. changes duty ratio of rear blower moto r control signal and controls the 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 AIR FLOW CONTROL
JMIIA0738GB
Revision: 2010 May2011 QX56

SYSTEMHAC-29
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING]
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 Sensitivity of exhaust gas / out side odor detecting sensor can be changed by “GAS SENSOR ADJUST-
MENT” in “WORK SUPPORT” mode of CONSULT-III. Refer to HAC-70, "
ACCS (ADVANCED CLIMATE
CONTROL SYSTEM) : Exhaust Gas / Outside Odor Detecting Sensor Sensitivity Adjustment Function".
 Automatic intake control (exhaust gas / outside odor detecting mechanism) does not operate when ambient
temperature is −2 °C (28 °F) or less. In this case, control is only for control of automatic air inlet of automatic
air conditioning system.
ACCS (ADVANCED CLIMATE CONTROL SYSTEM) : Plasmacluster Control
INFOID:0000000006275878
DESCRIPTION
Plasmacluster™ control eliminates microbes and reduces odor on interior surface by including high density
Plasmacluster
™ ion in air conditioning outlet air flow.
OPERATION DESCRIPTION
 Plasmacluster™ control operates by interlocking to blower motor. Plasmacluster™ control operates when
blower motor operates.
 Control status is displayed on front air conditioning system display screen. Refer to HAC-37, "
ACCS
(ADVANCED CLIMATE CONTROL SYSTEM) : Switch Name and Function".
NOTE:
 Plasmacluster
™ ion technology developed by Sharp Corporation is installed in this item.
 Plasmacluster
™ is a trademark of Sharp Corporation.
Revision: 2010 May2011 QX56

HAC-30
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONING]
OPERATION
OPERATION
FRONT AUTOMATIC AIR CONDITIONING SYSTEM
FRONT AUTOMATIC AIR CONDITIONING S
YSTEM : Switch Name and Function
INFOID:0000000006275881
WITH ACCS (ADVANCED CLIMATE CONTROL SYSTEM)
A/C Display
 Front air conditioning system state is indicated on the display.
 When “STATUS” on multifunction switch is pressed while front air conditioning system is in the ON position,
the display changes to state indication display of fr ont air conditioning system. When front air conditioning
system is operated while navigation system or audio system is displayed, front air conditioning system state
is indicated in the lower portion of display for several seconds.
 When MODE switch is pressed while front air conditioni ng system is in the OFF position, state indication dis-
play is indicated for several seconds.
Display Screen
Controller (Preset Switch)
Switch Operation
JMIIA0821GB
1. AUTO switch 2. Temperature control dial (Driver
side)3. MODE switch
4. OFF switch 5. A/C switch 6. Upper ventilator switch
7. Temperature control dial (passenger side) 8. DUAL switch 9. Intake switch
10. Fan switch 11. DEF switch
JMIIA0823ZZ
Revision: 2010 May2011 QX56

OPERATIONHAC-31
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING]
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AUTO switch Turns the switch indicator lamp and "AUTO" indicator on the display ON, and then front air condition-
ing system becomes the following state.
 Air inlet: Automatic control
 Air outlet: Automatic control
 Blower fan: Automatic control
 Compressor: ON
A/C switch Turns the compressor control (switch indicator) between ON
⇔ OFF each time while front blower fan
is activated.
NOTE:
 When front blower fan is OFF, the compressor control cannot be activated.
 When the compressor control (switch indicator) is in the OFF position, air inlet is fresh air intake (FRE).
Defroster (DEF) switch Turns DEF mode (switch indicator) between ON
⇔ OFF each time.
When DEF switch is pressed while front air conditioning system is in the ON position.
 When DEF mode is turned ON, front air conditioning system becomes the following state.
- Air inlet: Fresh air intake
- Air outlet: DEF
- Blower fan: Automatic control (If fan speed other than AUTO is selected before pressing DEF switch, fan speed is manual control.)
- Compressor: ON
 When DEF mode is turned OFF, front air conditioning system state returns to the previous state before DEF mode is selected. But, the following state is continued.
- Air inlet: Fresh air intake
- Compressor: ON When DEF switch is pressed while front air conditioning system is in the OFF position.
 When DEF mode is turned ON, front air conditioning system becomes the following state.
- Air inlet: Fresh air intake
- Air outlet: DEF
- Blower fan: Automatic control
- Compressor: ON
 When DEF mode is turned OFF, entire front air conditioning system is set to auto mode.
NOTE:
When DEF mode turns ON while front air conditioning system is in automatic control (“AUTO” is indi-
cated), automatic control is released (“AUTO” turns OFF).
DUAL switch  Turns left and right ventilation temperature separately control (switch indicator) between ON
⇔
OFF each time.
 When DUAL switch indicator is ON, the driver side and passenger side temperatures can each be set independently.
 When DUAL switch indicator is OFF, the driver side outlet and setting temperature is applied to both sides.
 Left and right ventilation temperature separately control is cancelled by turning the DEF mode ON.
NOTE:
When front air conditioning system is in the OFF position, left and right ventilation temperature sepa-
rately control can be selected only while front air conditioning system state (when MODE switch is
pressed) is indicated on the display.
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 front air conditioning system is in OFF, front air conditioning sys-
tem is activated. (Compressor control state returns to the previous state before front air condition-
ing system OFF.)
 When fan switch is pressed while front air conditioning system is in automatic control (“AUTO” is
indicated), automatic control is released (“AUTO” turns OFF).
MODE switch Selects air outlet sequentially from VENT
⇒ B/L ⇒ FOOT ⇒ D/F ⇒ VENT each time.
NOTE:
 When front air conditioning system is in the OFF position, air outlet can be selected.
 When MODE switch is pressed while front air conditioning system is in automatic control (“AUTO” is indicated), automatic control is released (“AUTO” turns OFF).
OFF switch  Turns front air conditioning system OFF.
 When front air conditioning system turns OFF, air inlet and air outlet become the automatic control.
Revision: 2010 May2011 QX56

HAC-32
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONING]
OPERATION
WITHOUT ACCS (ADVANCED CLIMATE CONTROL SYSTEM)
A/C Display
 Front air conditioning system state is indicated on the display.
 When “STATUS” on multifunction switch is pressed while
front air conditioning system is in the ON position,
the display changes to state indication display of fr ont air conditioning system. When front air conditioning
system is operated while navigation system or audio system is displayed, front air conditioning system state
is indicated in the lower portion of display for several seconds.
 When MODE switch is pressed while front air conditioni ng system is in the OFF position, state indication dis-
play is indicated for several seconds.
Display Screen
Controller (Preset Switch)
Intake switch Air inlet changes between recirculation (REC)
⇔ fresh air intake (FRE) each time this switch is
pressed.
 Intake switch indicator ON: Recirculation
 Intake switch indicator OFF: Fresh air intake
NOTE:
 When front air conditioning system is in the OFF position, air inlet can be selected.
 When MODE switch and DEF switch is in the D/F or DEF position, air inlet cannot be selected to recirculation (REC).
Temperature control dial
(driver side)  Selects set temperature within a range between 18.0
°C (60 °F) – 32.0 °C (90 °F) at a rate of 0.5 °C
(1.0 °F) each time the dial is rotated.
- Clockwise rotation: Set temperature increases.
- Counterclockwise rotation: Set temperature decreases.
NOTE:
When front air conditioning system is in the OFF position, set temperature can be selected only while
front air conditioning system state (when MODE switch is pressed) is indicated on the display.
Temperature control dial
(passenger side)  Selects set temperature within a range between 18.0
°C (60 °F) – 32.0 °C (90 °F) at a rate of 0.5 °C
(1.0 °F) each time the dial is rotated.
- Clockwise rotation: Set temperature increases.
- Counterclockwise rotation: Set temperature decreases.
 When the temperature control dial is turned, DUAL switch indicator turns ON.
NOTE:
When front air conditioning system is in the OFF position, set temperature can be selected only while
front air conditioning system state (when MODE switch is pressed) is indicated on the display.
Upper ventilator switch Turns the upper ventilator control (switch indicator) between ON
⇔ OFF each time while front blower
fan is activated.
NOTE:
 When front air conditioning system is in the OFF position and air outlet is DEF position, upper ven- tilator control cannot be activated.
 When front air conditioning system is in the OFF position, upper ventilator control can be selected
only while front air conditioning system state (when MODE switch is pressed) is indicated on the
display.
JMIIA0719GB
Revision: 2010 May2011 QX56

OPERATIONHAC-33
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING]
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Switch Operation
1. AUTO switch 2. Temperature control dial (Driver
side)3. MODE switch
4. OFF switch 5. A/C switch 6. Upper ventilator switch
7. Temperature control dial (passenger side) 8. DUAL switch 9. REC switch
10. FRE switch 11. Fan switch 12. DEF switch
JMIIA0822ZZ
AUTO switch Turns the switch indicator lamp and "AUTO" indicator on the display ON, and then front air condition-
ing system becomes the following state.
 Air inlet: Automatic control
 Air outlet: Automatic control
 Blower fan: Automatic control
 Compressor: ON
A/C switch Turns the compressor control (switch indicator) between ON
⇔ OFF each time while front blower fan
is activated.
NOTE:
 When front blower fan is OFF, the compressor control cannot be activated.
 When the compressor control (switch indicator) is in the OFF position, air inlet is fresh air intake (FRE).
Defroster (DEF) switch Turns DEF mode (switch indicator) between ON
⇔ OFF each time.
When DEF switch is pressed while front air conditioning system is in the ON position.
 When DEF mode is turned ON, front air conditioning system becomes the following state.
- Air inlet: Fresh air intake
- Air outlet: DEF
- Blower fan: Automatic control (If fan speed other than AUTO is selected before pressing DEF switch, fan speed is manual control.)
- Compressor: ON
 When DEF mode is turned OFF, front air conditioning system state returns to the previous state
before DEF mode is selected. But, the following state is continued.
- Air inlet: Fresh air intake
- Compressor: ON
When DEF switch is pressed while front air conditioning system is in the OFF position.
 When DEF mode is turned ON, front air conditioning system becomes the following state.
- Air inlet: Fresh air intake
- Air outlet: DEF
- Blower fan: Automatic control
- Compressor: ON
 When DEF mode is turned OFF, entire front air conditioning system is set to auto mode.
NOTE:
When DEF mode turns ON while front air conditioning system is in automatic control (“AUTO” is indi-
cated), automatic control is released (“AUTO” turns OFF).
Revision: 2010 May2011 QX56

HAC-34
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONING]
OPERATION
DUAL switch Turns left and right ventilation temperature separately control (switch indicator) between ON
⇔
OFF each time.
 When DUAL switch indicator is ON, the driver side and passenger side temperatures can each be set independently.
 When DUAL switch indicator is OFF, the driver side outlet and setting temperature is applied to both
sides.
 Left and right ventilation temperature separately control is cancelled by turning the DEF mode ON.
NOTE:
When front air conditioning system is in the OFF position, left and right ventilation temperature sepa-
rately control can be selected only while front air conditioning system state (when MODE switch is
pressed) is indicated on the display.
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 front air conditioning system is in OFF, front air conditioning sys-
tem is activated. (Compressor control state returns to the previous state before front air condition-
ing system OFF.)
 When fan switch is pressed while front air conditioning system is in automatic control (“AUTO” is
indicated), automatic control is released (“AUTO” turns OFF).
FRE switch  Air inlet is selected to fresh air intake (FRE) by pressing this switch.
- FRE indicator: ON
- REC indicator: OFF
 When FRE indicator is ON, pressing the FRE switch for approximately 1.5 seconds or more, and
then the FRE and REC switch indicators blink twice and the system is switched to the automatic
control.
NOTE:
When front air conditioning system is in the OFF position, air inlet can be selected.
MODE switch Selects air outlet sequentially from VENT
⇒ B/L ⇒ FOOT ⇒ D/F ⇒ VENT each time.
NOTE:
 When front air conditioning system is in the OFF position, air outlet can be selected.
 When MODE switch is pressed while front air conditioning system is in automatic control (“AUTO” is indicated), automatic control is released (“AUTO” turns OFF).
OFF switch  Turns front air conditioning system OFF.
 When front air conditioning system turns OFF, air inlet and air outlet become the automatic control.
REC switch  Air inlet is selected to fresh air intake (REC) by pressing this switch.
- REC indicator: ON
- FRE indicator: OFF
 When REC indicator is ON, pressing the REC switch for approximately 1.5 seconds or more, and
then the FRE and REC switch indicators blink twice and the system is switched to the automatic
control.
NOTE:
 When front air conditioning system is in the OFF position, air inlet can be selected.
 When MODE switch and DEF switch is in the D/F or DEF position, air inlet cannot be selected to recirculation (REC).
Temperature control dial
(driver side)  Selects set temperature within a range between 18.0
°C (60 °F) – 32.0 °C (90 °F) at a rate of 0.5 °C
(1.0 °F) each time the dial is rotated.
- Clockwise rotation: Set temperature increases.
- Counterclockwise rotation: Set temperature decreases.
NOTE:
When front air conditioning system is in the OFF position, set temperature can be selected only while
front air conditioning system state (when MODE switch is pressed) is indicated on the display.
Revision: 2010 May2011 QX56

OPERATIONHAC-35
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING]
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REAR AUTOMATIC AIR CONDITIONING SYSTEM
REAR AUTOMATIC AIR CONDITIONING SY STEM : Switch Name and Function
INFOID:0000000006275882
FRONT CONTOLLER OPERATION
A/C Display
 Rear air conditioning system state is indicated on the front display.
 When REAR switch is pressed while air conditioning syst em is in the ON position, the front display changes
to state indication display (rear contro l mode) of rear air conditioning system.
Display screen
Controller (Preset Switch)
With ACCS (advanced climate control system)
Temperature control dial
(passenger side)  Selects set temperature within a range between 18.0
°C (60 °F) – 32.0 °C (90 °F) at a rate of 0.5 °C
(1.0 °F) each time the dial is rotated.
- Clockwise rotation: Set temperature increases.
- Counterclockwise rotation: Set temperature decreases.
 When the temperature control dial is turned, DUAL switch indicator turns ON.
NOTE:
When front air conditioning system is in the OFF position, set temperature can be selected only while
front air conditioning system state (when MODE switch is pressed) is indicated on the display.
Upper ventilator switch Turns the upper ventila
tor control (switch indicator) between ON ⇔ OFF each time while front blower
fan is activated.
NOTE:
 When front air conditioning system is in the OFF position and air outlet is DEF position, upper ven- tilator control cannot be activated.
 When front air conditioning system is in the OFF position, upper ventilator control can be selected only while front air conditioning system state (when MODE switch is pressed) is indicated on the
display.
JMIIA0720ZZ
JMIIA0825ZZ
1. AUTO switch 2. Temperature control dial (Driver
side)3. MODE switch
4. REAR switch 5. OFF switch 6. Fan switch
Revision: 2010 May2011 QX56

HAC-36
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONING]
OPERATION
Without ACCS (advanced
climate control system)
Switch Operation
REAR CONTROLLER OPERATION
Controller (Rear A/C Control)
JMIIA0824ZZ
1. AUTO switch 2. Temperature control dial (Driver
side)3. MODE switch
4. REAR switch 5. OFF switch 6. Fan switch
AUTO switch Turns the switch indicator lamp and "AUTO" indicator on the front display ON, and then rear air con-
ditioning 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 control mode is ON)
 When rear air conditioning system turns OFF, air outlet become the automatic control.
REAR switch  Turns the switch indicator lamp and rear control mode on the front display ON, and then rear air
conditioning system becomes the following state.
- Air outlet: Automatic control
- Blower fan: Automatic control
- Compressor: ON
 Rear control mode is released when switch is pressed again (rear air conditioning system operates continuously).
Temperature control dial
(driver side)  Selects set temperature within a range between 18.0
°C (60 °F) – 32.0 °C (90 °F) at a rate of 0.5 °C
(1.0 °F) each time the dial is rotated.
- Clockwise rotation: Set temperature increases.
- Counterclockwise rotation: Set temperature decreases.
Revision: 2010 May2011 QX56