2009 INFINITI QX56 heating

check oil turn signal bulb brakes technical specifications trip computer headrest

Page 2234 of 4171

INFINITI QX56 2009 Factory Service Manual GI-40
< BASIC INSPECTION >
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
An unclamped or loose harness can cause wiring to be pinched by seat components (such as slide guides)
during vehicle vibration.

GI-40
< BASIC INSPECTION >
SERVICE INFORMATION FOR ELECTRICAL INCIDENT
An unclamped or loose harness can cause wiring to be pinched by seat components (such as slide guides)
during vehicle vibration. If the wiring runs under s eating areas, inspect wire routing for possible damage or
pinching.
HEAT SENSITIVE
• The customer's concern may occur during hot weather or after car has sat for a short time. In such cases you will want to check for a
heat sensitive condition.
• To determine if an electrical component is heat sensitive, heat the component with a heat gun or equivalent.
CAUTION:
Do not heat components above 60 °C (140° ).
• If incident occurs while heating the unit, either replace or properly insulate the component.
FREEZING
• The customer may indicate the incident goes away after the carwarms up (winter time). The cause could be related to water freez-
ing somewhere in the wiring/electrical system.
• There are two methods to check for this. The first is to arrange for the owner to leave his car overnight. Make sure it will get cold
enough to demonstrate his complaint. Leave the car parked out-
side overnight. In the morning, do a quick and thorough diagnosis
of those electrical components which could be affected.
• The second method is to put the suspect component into a freezer long enough for any water to freeze. Reinstall the part into the car
and check for the reoccurrence of the incident. If it occurs, repair or
replace the component.
WATER INTRUSION
The incident may occur only during high humidity or in rainy/snowy
weather. In such cases the incident could be caused by water intru-
sion on an electrical part. This can be simulated by soaking the car
or running it through a car wash.
CAUTION:
Do not spray water directly on any electrical components.
ELECTRICAL LOAD
The incident may be electrical load sensitive. Perform diagnosis with
all accessories (including A/C, rear window defogger, radio, fog
lamps) turned on.
COLD OR HOT START UP
On some occasions an electrical incident may occur only when the car is started cold, or it may occur when
the car is restarted hot shortly after being turned off. In these cases you may have to keep the car overnight to
make a proper diagnosis.
SGI842
SGI843
SGI844
SGI845
Revision: December 20092009 QX56

Page 2315 of 4171

INFINITI QX56 2009 Factory Service Manual HAC-2
MAGNET CLUTCH ............................................72
System Description .............................................. ...72
Magnet Clutch Component Function Check ........ ...72
Magne

HAC-2
MAGNET CLUTCH ............................................72
System Description .............................................. ...72
Magnet Clutch Component Function Check ........ ...72
Magnet Clutch Diagnosis Procedure ................... ...73
WATER VALVE CIRCUIT ..................................77
Description ........................................................... ...77
Water Valve Diagnosis Procedure ..........................77
AMBIENT SENSOR ...........................................79
Component Description ....................................... ...79
Ambient Sensor Diagnosis Procedure ....................79
Ambient Sensor Component Inspection .................80
IN-VEHICLE SENSOR .......................................82
Component Description ....................................... ...82
In-Vehicle Sensor Diagnosis Procedure .................82
In-Vehicle Sensor Component Inspection ..............84
OPTICAL SENSOR ...........................................85
Component Description ..........................................85
Optical Sensor Diagnosis Procedure ......................85
INTAKE SENSOR ..............................................87
System Description .............................................. ...87
Intake Sensor Diagnosis Procedure .......................87
Intake Sensor Component Inspection ................. ...88
POWER SUPPLY AND GROUND CIRCUIT
FOR CONTROLLER ..........................................
89
Component Description ....................................... ...89
A/C Auto Amp. Component Function Check ..........89
A/C Auto Amp Power and Ground Diagnosis Pro-
cedure .....................................................................
90
ECU DIAGNOSIS .......................................91
AIR CONDITIONER CONTROL ..................... ...91
A/C Auto Amp. Terminals Reference Values ..........91
Wiring Diagram .................................................... ...93
SYMPTOM DIAGNOSIS ...........................109
AIR CONDITIONER CONTROL ..................... ..109
Symptom Matrix Chart ........................................ .109
INSUFFICIENT COOLING ................................110
Component Function Check ................................ .110
Diagnostic Work Flow ...........................................111
Performance Chart ................................................113
Trouble Diagnoses for Abnormal Pressure ...........114
INSUFFICIENT HEATING ................................118
Component Function Check .................................118
NOISE ...............................................................120
Component Function Check ................................ .120
MEMORY FUNCTION DOES NOT OPERATE ..122
Memory Function Check ...................................... .122
PRECAUTION ...........................................123
PRECAUTIONS .............................................. ..123
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
123
Working with HFC-134a (R-134a) ........................ .123
Precaution for Service Equipment ........................124
Revision: December 20092009 QX56

Page 2323 of 4171

INFINITI QX56 2009 Factory Service Manual HAC-10
< FUNCTION DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
FUNCTION INFORMATION
Defroster door motor is malfunctioning. Go to Trouble Diagnosis Procedure for Defroster Door Motor.
HAC-46
Front blower mo

Page 2422 of 4171

INFINITI QX56 2009 Factory Service Manual AIR CONDITIONER CONTROLHAC-109
< SYMPTOM DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
SYMPTOM DIAGNOSIS
AIR CONDITIONER CONTROL
Symptom Matrix ChartINFOID:0000000003775390

Page 2431 of 4171

INFINITI QX56 2009 Factory Service Manual HAC-118
< SYMPTOM DIAGNOSIS >[AUTOMATIC AIR CONDITIONER]
INSUFFICIENT HEATING
INSUFFICIENT HEATING
Component Function CheckINFOID:0000000003775396
SYMPTOM: Insufficient heating
INSPECTION FLOW
1.CONFI

Page 2432 of 4171

INFINITI QX56 2009 Factory Service Manual INSUFFICIENT HEATINGHAC-119
< SYMPTOM DIAGNOSIS > [AUTOMATIC AIR CONDITIONER]
C
D
E
F
G H
J
K L
M A
B
HAC
N
O P
Is the inspection result normal?
YES >> System OK.
NO >> Repair or replace as necessary.

Page 3244 of 4171

INFINITI QX56 2009 Factory Service Manual SE-12
< COMPONENT DIAGNOSIS >
HEATED SEAT
HEATED SEAT
DescriptionINFOID:0000000003775445
• When handling seat, be extremely careful not to scratch heating unit.
• Front passenger seat cushion and

Page 3280 of 4171

INFINITI QX56 2009 Factory Service Manual SE-48
< ON-VEHICLE REPAIR >
FRONT SEAT
1. Headrest2. Headrest holder with multi-position
lock 3. Seatback assembly
4. Lumbar switch bezel 5. Power seat switch escutcheon 6. Recliner switch knob
7.

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