2011 INFINITI QX56 Factory Service Manual

fuse diagram jacking manual radio set relay deactivate airbag sport mode

Page 3129 of 5598

INFINITI QX56 2011 Factory Service Manual
SYSTEMHAC-23
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING]
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REAR AUTOMATIC AIR CONDITION ING SYSTEM : System DiagramINFOID:0000000006275869
REAR AUTOMATIC AIR C

Page 3130 of 5598

INFINITI QX56 2011 Factory Service Manual
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

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

Page 3131 of 5598

INFINITI QX56 2011 Factory Service Manual
SYSTEMHAC-25
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING]
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When rear blower motor is activated, A/C auto amp. gradually increases duty ratio of rear blower m

Page 3132 of 5598

INFINITI QX56 2011 Factory Service Manual
HAC-26
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONING]
SYSTEM
REAR AUTOMATIC AIR CONDITION ING SYSTEM : Door Control
INFOID:0000000006275873
DOOR MOTOR CONTROL
LCU (Local Control Unit) is built

Page 3133 of 5598

INFINITI QX56 2011 Factory Service Manual
SYSTEMHAC-27
< SYSTEM DESCRIPTION > [AUTOMATIC AIR CONDITIONING]
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AIR DISTRIBUTION
REAR AUTOMATIC AIR CONDITIONING SYSTEM : Temperature ControlINFOID:000000000627587

Page 3134 of 5598

INFINITI QX56 2011 Factory Service Manual
HAC-28
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONING]
SYSTEM
ACCS (ADVANCED CLIMATE CONT ROL SYSTEM) : System Diagram
INFOID:0000000006275875
ACCS (ADVANCED CLIMATE CONTROL SYSTEM) : System Desc

HAC-28
< SYSTEM DESCRIPTION >[AUTOMATIC AIR CONDITIONING]
SYSTEM
ACCS (ADVANCED CLIMATE CONT ROL SYSTEM) : System Diagram
INFOID:0000000006275875
ACCS (ADVANCED CLIMATE CONTROL SYSTEM) : System DescriptionINFOID:0000000006275876
ACCS (advanced climate control system) controls pass enger room air. It maintains the cleanliness of the
passenger room air using an in-cabin microfilter and a combination of each of the following functions.
- HAC-28, "
ACCS (ADVANCED CLIMATE CONT ROL SYSTEM) : Automatic Intake Control (Exhaust Gas /
Outside Odor Detecting Mechanism)"
-HAC-29, "ACCS (ADVANCED CLIMATE CONTROL SYSTEM) : Plasmacluster Control"
NOTE:
Plasmacluster
™ ion technology developed by Sharp Corporation is installed in this item.
Plasmacluster
™ is a trademark of Sharp Corporation.
Various operations of ACCS (advanced climate contro l system) are transmitted from preset switch to AV
control unit via communication line and from AV contro l unit to A/C auto amp. via CAN communication. A/C
auto amp. sends each indication information to AV c ontrol unit via CAN communication. AV control unit dis-
plays each indication information that is received.
ACCS (ADVANCED CLIMATE CONTROL SYSTE M) : Automatic Intake Control (Ex-
haust Gas / Outside Odor Detecting Mechanism)
INFOID:0000000006275877
DESCRIPTION
In addition to air inlet automatic control of front automatic air conditioning system, A/C auto amp. controls
automatically air inlet according to signal from ex haust gas / outside odor detecting sensor, so that unpleasant
outside odor does not enter in passenger room.
OPERATION DESCRIPTION
When pressing auto intake switch while front blower motor is operated and DEF switch is OFF, auto intake switch indicator lamp and intake switch indicator lamp turn ON. Air inlet is fixed to recirculation for approxi-
mately 5 minutes, and then is switched to automatic intake control (exhaust gas / outside odor detecting
mechanism).
Air inlet switches to recirculation when exhaust gas or outside odor is detected while automatic intake control
(exhaust gas / outside odor detecting mechanism) is operated. After that, air inlet switches to fresh air intake
when exhaust gas or outside odor becomes not detectable.
NOTE:
JMIIA0819GB
Revision: 2010 May2011 QX56

Page 3135 of 5598

INFINITI QX56 2011 Factory Service Manual
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

Page 3136 of 5598

INFINITI QX56 2011 Factory Service Manual
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:000000

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