2007 INFINITI QX56 Factory Service Manual

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Page 393 of 3061

INFINITI QX56 2007 Factory Service Manual
AIR CONDITIONER CONTROLATC-23
< SERVICE INFORMATION >
C
DE
F
G H
I
K L
M A
B
AT C
N
O P
MAGNET CLUTCH CONTROL
When A/C switch or DEF switch is pressed, front air control inputs compressor ON signal

Page 394 of 3061

INFINITI QX56 2007 Factory Service Manual
ATC-24
< SERVICE INFORMATION >
AIR CONDITIONER CONTROL
The relationship of these components is shown in the figure below:
Control OperationINFOID:0000000003533236
Front air control
DISPLAY SCREEN
Dis

Page 395 of 3061

INFINITI QX56 2007 Factory Service Manual
AIR CONDITIONER CONTROLATC-25
< SERVICE INFORMATION >
C
DE
F
G H
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K L
M A
B
AT C
N
O P
TEMPERATURE CONTROL DIAL (TEMPE RATURE CONTROL) (DRIVER SIDE)
Increases or decreases the set temperature.
TEMPE

AIR CONDITIONER CONTROLATC-25
< SERVICE INFORMATION >
C
DE
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G H
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M A
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AT C
N
O P
TEMPERATURE CONTROL DIAL (TEMPE RATURE CONTROL) (DRIVER SIDE)
Increases or decreases the set temperature.
TEMPERATURE CONTROL DIAL (TEMPERATURE CONTROL) (PASSENGER SIDE)
Increases or decreases the set temperature.
TEMPERATURE CONTROL DIAL (TEMPERA TURE AND MODE CONTROL) (REAR)
Increases or decreases the set temperature. The mode al so changes from foot at full hot setting, to foot/vent
mid-range (warm) setting, and then to panel on full cold setting.
RECIRCULATION ( ) SWITCH
• When REC switch is ON, REC switch indicator turns ON, and air inlet is set to REC.
• When REC switch is turned OFF, or when compressor is turned from ON to OFF, REC switch is automati-
cally turned OFF. REC mode can be re-entered by pressing REC switch again.
• REC switch is not operated when DEF switch is tu rned ON, at the D/F position or in floor position.
DEFROSTER ( ) SWITCH
Positions the air outlet doors to the defrost position. Al so positions the intake doors to the outside air position.
REAR WINDOW DEFOGGER SWITCH
When switch is ON, rear window and door mirrors are defogged.
OFF SWITCH
The compressor and blower are OFF, the intake doors are set to the outside air position, and the air outlet
doors are set to the foot (75% foot and 25% defrost) position.
A/C SWITCH
The compressor is ON or OFF.
(Pressing the A/C switch when the AUTO switch is ON will turn off the A/C switch and compressor.)
MODE SWITCH (FRONT)
Controls the air discharge outlets.
FRONT BLOWER CONTROL DIAL
Manually control the blower speed. Seven speeds are av ailable for manual control (as shown on the display
screen).
Rear Air Control
TEMPERATURE CONTROL DIAL (TEM PERATURE AND MODE CONTROL)
The temperature increases or decreases the set temperat ure. The mode also changes from foot at full hot set-
ting, to foot/vent at mid-range (warm) setti ng, and then to vent at full cold setting.
REAR BLOWER CONTROL DIAL
When the rear blower switch (front) is in the OFF position, the rear blower motor cannot operate.
When the rear blower switch (front) is in the REAR positi on, it allows the rear blower switch (rear) to control
the rear blower motor speed. In any other position (1-4), the rear blower switch (front) controls the rear blower
motor speed regardless of the rear blower switch (rear) position.
WJIA1042E

Page 396 of 3061

INFINITI QX56 2007 Factory Service Manual
ATC-26
< SERVICE INFORMATION >
AIR CONDITIONER CONTROL
Discharge Air Flow
INFOID:0000000003533237
FRONT
REAR
WJIA0540E
WJIA0528E
WJIA0541E

Page 397 of 3061

INFINITI QX56 2007 Factory Service Manual
AIR CONDITIONER CONTROLATC-27
< SERVICE INFORMATION >
C
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G H
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K L
M A
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AT C
N
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System Description (Front)INFOID:0000000003533238
SWITCHES AND THEIR CONTROL FUNCTION
WJIA1236E
WJIA1680E

Page 398 of 3061

INFINITI QX56 2007 Factory Service Manual
ATC-28
< SERVICE INFORMATION >
AIR CONDITIONER CONTROL
System Description (Rear)
INFOID:0000000003533239
SWITCHES AND THEIR CONTROL FUNCTION
WJIA1237E
WJIA0623E

Page 399 of 3061

INFINITI QX56 2007 Factory Service Manual
AIR CONDITIONER CONTROLATC-29
< SERVICE INFORMATION >
C
DE
F
G H
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K L
M A
B
AT C
N
O P
CAN Communication System DescriptionINFOID:0000000003533240
Refer to LAN-4.
WJIA1067E

Page 400 of 3061

INFINITI QX56 2007 Factory Service Manual
ATC-30
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
CONSULT-II Function (HVAC)INFOID:0000000003533241
CONSULT-II can display each diagnostic item using the diagnostic test modes shown

ATC-30
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
CONSULT-II Function (HVAC)INFOID:0000000003533241
CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.
CONSULT-II START PROCEDURE
Refer to GI-36, "CONSULT-II Start Procedure".
SELF-DIAGNOSIS
Display Item List
DATA MONITOR
Display Item List
Diagnostic mode Description
SELF-DIAG RESULTS Displays front ai r control self-diagnosis results.
DATA MONITOR Displays front air control input/output data in real time.
CAN DIAG SUPPORT MNTR The result of transmit/receive diagnosis of CAN communication can be read. ECU PART NUMBER Front air control part number can be read.
DTC Description Reference page
B2573 Battery voltage out of range SC-4
B2578 In-vehicle sensor circuit out of range (low)
AT C - 11 6 , "In-vehicle Sensor Circuit"B2579 In-vehicle sensor circuit out of range (high)
B257B Ambient sensor circuit short AT C - 11 4
B257C Ambient sensor circuit open
B257F Optical sensor (Driver) circuit open or short AT C - 11 9 , "
Optical Sensor Circuit"B2580 Optical sensor (Passenger) circuit open or short
B2581 Intake sensor circuit shortATC-120, "
Intake Sensor Circuit"B2582 Intake sensor circuit open
U1000 CAN bus fault LAN-4, "
CAN Communication System"
B2587 Stuck buttonATC-123, "Removal and Installation"
Monitor item Value Contents
BATT VIA CAN "V" Displays battery voltage signal.
IGN VIA CAN "ON/OFF" Displays ignition switch signal.
DVR SUNLD SEN "w/m2" Displays optical sensor (driver) signal.
PAS SUNLD SEN "w/m2" Displays optical sensor (passenger) signal.
AMB TEMP SEN " °C/ °F" Displays ambient sensor 1 signal.
EVAP TEMP SEN " °C/ °F" Displays intake sensor signal.
INCAR TMP SEN " °C/ °F" Displays in-vehicle sensor signal.
RR TEMPSET FR "V" Displays air mix door (front) set point signal.
RR TEMPSET RR "V" Displays air mi x door (rear) set point signal.
MODE FDBCK "V" Displays mode door motor feedback signal.
DVR MIX FDBCK "V" Displays air mix do or motor (driver) feedback signal.
PAS MIX FDBCK "V" Displays air mix door motor (passenger) feedback signal.
RR FDBCK "V" Displays air mix door motor (rear) feedback signal.

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