INFINITI QX56 2011 Factory Service Manual

GW-22
< REMOVAL AND INSTALLATION >
FRONT REGULATOR
Inspection and Adjustment
INFOID:0000000006220828
SYSTEM INITIALIZATION
Initialize the system if any of the following work has been done. Refer to PWC-31, "Description".
Initialization
Follow the steps below after installing each component to the vehicle. Refer to PWC-31, "Work Procedure".
FITTING INSPECTION
 Check that the glass is fit securely into the sash groove.
 Lower the glass slightly [approximately 10 to 20 mm (0.394 to 0.787 in)], and check that the clearance to the
sash is parallel. Loosen the regulator mounting bolts, guide rail mounting bolts, and glass and guide rail
mounting bolts to correct the glass position if the clearance between the glass and sash is not parallel.
Revision: 2010 May2011 QX56

REAR DOOR GLASSGW-23
< REMOVAL AND INSTALLATION >
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REAR DOOR GLASS
Exploded ViewINFOID:0000000006220829
Removal and InstallationINFOID:0000000006220830
REMOVAL
1. Remove rear door finisher. Refer to INT-16, "Removal and Installation".
2. Remove rear door inside seal.
3. Remove rear door outside molding. Refer to EXT-32, "
Removal and Installation".
4. Remove rear door pull handle bracket mounting bolts and remove it.
5. Disconnect rear door speaker harness connector.
6. Remove the rear door sealing screen with a cutter tool. NOTE:
Cut the butyl-tape so that some parts of the butyl-tape do not remain on the rear door sealing screen, if the
sealing screen is reused.
7. Reconnect the rear door power window switch.
1. Rear door panel 2. Rear door glass run 3. Partition sash
4. Partition glass 5. Rear door glass 6. Rear door regulator
7. Rear power window motor 8. Rear door pull handle bracket 9. Rear door sealing screen
10. Grommet 11. Rear door inside seal
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Revision: 2010 May2011 QX56

GW-24
< REMOVAL AND INSTALLATION >
REAR DOOR GLASS
8. Operate the power window switch to raise or lower the door win-dow until the glass mounting bolts can be seen.
9. Remove the rear door glass mounting bolts.
10. Raise rear door glass up and hold it with a suction lifter (A).
11. Disconnect rear door power window motor harness connector.
12. Remove rear door regulator mounting nuts.
13. Remove rear door power window motors mounting bolts.
14. Remove rear door regulator from rear door panel.
15. Securely place rear door glass down inside rear door panel.
16. Remove rear door glass run.
17. Remove rear door sash mounting bolts and screw, and then pull it up to remove.
CAUTION:
Be careful not to scratch or damage rear door glass with
rear door sash.
18. Remove rear door glass from rear door panel as shown by the figure.
: Bolt
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Revision: 2010 May2011 QX56

REAR DOOR GLASSGW-25
< REMOVAL AND INSTALLATION >
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19. Slide partition glass toward the vehicle and remove it as shown in the figure.
INSTALLATION
Install in the reverse order of removal.
Inspection and AdjustmentINFOID:0000000006220831
SYSTEM INITIALIZATION
Initialize the system if any of t he following work has been done. Refer to PWC-31, "Description".
Initialization
Follow the steps below after installing each component to the vehicle. Refer to PWC-31, "Work Procedure".
FITTING INSPECTION
 Check that the glass is fit securely into the sash groove.
 Lower the glass slightly [approximately 10 to 20 mm (0.394 to 0.787 in)], and check that the clearance to the
sash is parallel. Loosen the regulator mounting bolts, guide rail mounting bolts, and glass and guide rail
mounting bolts to correct the glass position if the clearance between the glass and sash is not parallel.
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Revision: 2010 May2011 QX56

GW-26
< REMOVAL AND INSTALLATION >
REAR REGULATOR
REAR REGULATOR
Exploded ViewINFOID:0000000006220832
Removal and InstallationINFOID:0000000006220833
REMOVAL
1. Remove rear door finisher. Refer to INT-16, "Removal and Installation".
2. Remove rear door inside seal.
3. Remove rear door outside molding. Refer to EXT-32, "
Removal and Installation".
4. Remove rear pull handle bracket mounting bolts and then remove it.
5. Disconnect rear door speaker harness connector.
6. Remove the sealing screen with a cutter tool. NOTE:
Cut the butyl-tape so that some parts of the butyl-t ape do not remain on the sealing screen, if the sealing
screen is reused.
7. Reconnect the rear door power window switch.
1. Rear door panel 2. Rear door glass run 3. Partition sash
4. Partition glass 5. Rear door glass 6. Rear door regulator
7. Rear power window motor 8. Rear door pull handle bracket 9. Rear door sealing screen
10. Grommet 11. Rear door inside seal
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Revision: 2010 May2011 QX56

REAR REGULATORGW-27
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8. Operate the power window switch to raise or lower the door win- dow until the glass mounting bolts can be seen.
9. Remove the rear door glass mounting bolts.
10. Raise rear door glass up and hold it with a suction lifter (A).
11. Disconnect rear door power window motor harness connector.
12. Remove rear door regulator mounting nuts.
13. Remove rear door power window motors mounting bolts.
14. Remove rear door regulator from rear door panel.
INSTALLATION
Install in the reverse order of removal.
Disassembly and AssemblyINFOID:0000000006220834
DISASSEMBLY
Remove rear power window motor from rear door regulator.
ASSEMBLY
Assemble in the reverse order of disassembly.
Inspection and AdjustmentINFOID:0000000006220835
SYSTEM INITIALIZATION
Initialize the system if any of t he following work has been done. Refer to ADP-51, "ADDITIONAL SERVICE
WHEN REMOVING BATTERY NEGATIVE TERMINAL : Description".
Initialization
Follow the steps below after installing each component to the vehicle. Refer to ADP-51, "ADDITIONAL SER-
VICE WHEN REMOVING BATTERY NEGATIVE TERMINAL : Special Repair Requirement".
FITTING INSPECTION
 Check that the glass is fit securely into the sash groove.
 Lower the glass slightly [approximately 10 to 20 mm (0.394 to 0.787 in)], and check that the clearance to the
sash is parallel. Loosen the regulator mounting bolts, guide rail mounting bolts, and glass and guide rail
mounting bolts to correct the glass position if the clearance between the glass and sash is not parallel.
: Bolt
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Revision: 2010 May2011 QX56

HA-1
VENTILATION, HEATER & AIR CONDITIONER
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CONTENTS
HEATER & AIR CONDITIONING SYSTEM
PRECAUTION ................ ...............................3
PRECAUTIONS .............................................. .....3
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
3
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect .....................................
3
Precaution for Procedure without Cowl Top Cover ......4
Precautions For Refrigerant System Service ............4
Service Equipment ....................................................6
PREPARATION ............................................9
PREPARATION .............................................. .....9
Special Service Tool ........................................... ......9
Commercial Service Tool ........................................12
Sealant or/and Lubricant .........................................12
SYSTEM DESCRIPTION .............................13
COMPONENT PARTS ................................... ....13
Component Parts Location .................................. ....13
Component Description ...........................................13
SYSTEM .............................................................14
System Diagram .................................................. ....14
System Description .................................................14
BASIC INSPECTION ...................................16
DIAGNOSIS AND REPAIR WORKFLOW ..... ....16
Work Flow ........................................................... ....16
REFRIGERANT ..................................................18
Description .......................................................... ....18
Leak Test ................................................................18
Recycle Refrigerant .................................................20
Charge Refrigerant ..................................................20
LUBRICANT ................................................... ....22
Description .......................................................... ....22
Inspection ............................................................ ....22
Perform Lubricant Return Operation .......................22
Lubricant Adjusting Procedure for Components
Replacement Except Compressor ...........................
22
Lubricant Adjusting Procedure for Compressor
Replacement ...........................................................
23
PERFORMANCE TEST ....................................25
Inspection ................................................................25
SYMPTOM DIAGNOSIS ..............................27
REFRIGERATION SYSTEM SYMPTOMS ........27
Trouble Diagnosis For Unusual Pressure ............ ....27
Symptom Table .......................................................27
NOISE ................................................................29
Symptom Table .......................................................29
REMOVAL AND INSTALLATION ...............30
COMPRESSOR .................................................30
Exploded View ..................................................... ....30
COMPRESSOR ..........................................................30
COMPRESSOR : Removal and Installation ............30
MAGNET CLUTCH ................................................ ....31
MAGNET CLUTCH : Removal and Installation of
Compressor Clutch ..................................................
31
Inspection ................................................................32
COOLER PIPE AND HOSE ..............................33
Exploded View .........................................................33
HIGH-PRESSURE FLEXIBLE HOSE ........................34
HIGH-PRESSURE FLEXIBLE HOSE : Removal
and Installation .................................................... ....
34
LOW-PRESSURE FLEXIBLE HOSE ..................... ....35
LOW-PRESSURE FLEXIBLE HOSE : Removal
and Installation ........................................................
35
HIGH-PRESSURE PIPE ............................................35
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HA-2
HIGH-PRESSURE PIPE : Removal and Installa-
tion ....................................................................... ...
35
LOW-PRESSURE PIPE ......................................... ...36
LOW-PRESSURE PIPE : Removal and Installa-
tion ..........................................................................
36
REAR COOLER PIPE ............................................ ...37
REAR COOLER PIPE : Removal and Installation ...37
CONDENSER ................................................. ...38
Exploded View ..................................................... ...38
CONDENSER ......................................................... ...38
CONDENSER : Removal and Installation ..............38
LIQUID TANK ......................................................... ...39
LIQUID TANK : Removal and Installation ...............39
REFRIGERANT PRESSURE SENSOR ....................39
REFRIGERANT PRESSURE SENSOR : Remov-
al and Installation ................................................. ...
39
A/C UNIT ASSEMBLY .................................... ...41
Exploded View ..................................................... ...41
HEATER & COOLING UNIT ASSEMBLY ................42
HEATER & COOLING UNIT ASSEMBLY : Re-
moval and Installation .......................................... ...
42
EVAPORATOR ...................................................... ...43
EVAPORATOR : Removal and Installation ............43
HEATER CORE ...................................................... ...44
HEATER CORE : Removal and Installation ...........44
EXPANSION VALVE .............................................. ...44
EXPANSION VALVE : Removal and Installation ....44
REAR A/C UNIT ................................................46
Exploded View ..................................................... ...46
REAR A/C UNIT ASSEMBLY ...................................47
REAR A/C UNIT ASSEMBLY : Removal and In-
stallation ............................................................... ...
47
EVAPORATOR ....................................................... ...48
EVAPORATOR : Removal and Installation .............48
EVAPORATOR PIPE ASSEMBLY ........................ ...48
EVAPORATOR PIPE ASSEMBLY : Removal and
Installation ...............................................................
48
HEATER CORE ...................................................... ...48
HEATER CORE : Removal and Installation ............48
EXPANSION VALVE .............................................. ...49
EXPANSION VALVE : Removal and Installation ....49
SERVICE DATA AND SPECIFICATIONS
(SDS) .......... ................................................
50
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ...
50
Compressor ......................................................... ...50
Lubricant .................................................................50
Refrigerant ..............................................................50
Engine Idling Speed ................................................50
Belt Tension ............................................................50
Revision: 2010 May2011 QX56

PRECAUTIONSHA-3
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006276136
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision that would result in air ba g inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
 When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
 When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wh eel Rotation after Battery Disconnect
INFOID:0000000006276137
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the batte ry disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock wil l remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
Revision: 2010 May2011 QX56

HA-4
< PRECAUTION >
PRECAUTIONS
5. When the repair work is completed, re-connect both battery cables. With the brake pedal released, turn
the push-button ignition switch from ACC position to ON position, then to LOCK position. (The steering
wheel will lock when the push-button igniti on switch is turned to LOCK position.)
6. Perform self-diagnosis check of all control units using CONSULT-III.
Precaution for Procedure without Cowl Top CoverINFOID:0000000006276138
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Precautions For Refrigerant System ServiceINFOID:0000000006276139
GENERAL REFRIGERANT PRECAUTION
WARNING:
 Never breathe A/C refrigerant an d lubricant vapor or mist. Exposure may irritate eyes, nose and
throat. Use only approved reco very/recycling equipment to discharge HFC-134a (R-134a) refrigerant.
Ventilate work area before resuming service if acci dental system discharge occurs. Additional health
and safety information may be obtained from refrigerant and lubricant manufacturers.
 Never release refrigerant into the air. Use appro ved recovery/recycling recharging equipment to cap-
ture the refrigerant each time an ai r conditioning system is discharged.
 Wear always eye and hand protection (goggles and gloves) when working with any refrigerant or air
conditioning system.
 Never store or heat refrigerant containers above 52 °C (126 °F).
 Never heat a refrigerant container with an open flame; Place the bottom of the container in a warm
pail of water if container warming is required.
 Never intentionally drop, puncture, or incinerate refrigerant containers.
 Keep refrigerant away from open flames: pois onous gas is produced if refrigerant burns.
 Refrigerant displaces oxygen, therefore be certain to work in well ventilated areas to prevent suffo-
cation.
 Never pressure test or leakage test HFC-134a (R- 134a) service equipment and/or vehicle air condi-
tioning systems with compressed air during repair. Some mixtures of air and HFC-134a (R-134a)
have been shown to be combusti ble at elevated pressures. These mixtures, if ignited, may cause
injury or property damage. Additional health and safety information may be obtained from refriger-
ant manufacturers.
WORKING WITH HFC-134a (R-134a)
CAUTION:
 CFC-12 (R-12) refrigerant and HFC-134a (R-134a) re frigerant are not compatible. These regrigerants
must never be mixed, even in the smallest amount s. Compressor malfunction is likely occur if the
refrigerants are mixed.
 Use only specified lubricant for the HFC-134a (R-134a) A/C system and HFC-134a (R-134a) compo-
nents. Compressor malfunction is likely to occur if lubricant other than that specified is used.
 The specified HFC-134a (R-134a) lu bricant rapidly absorbs moisture from the atmosphere. The fol-
lowing handling precauti ons must be observed:
- Cap (seal) immediately the compon ent to minimize the entry of moisture from the atmosphere when
removing refrigerant components from a vehicle.
- Never remove the caps (unseal) until just before co nnecting the components when installing refrig-
erant components to a vehicle. Connect all refr igerant loop components as quickly as possible to
minimize the entry of moisture into system.
- Use only the specified lubricant from a sealed contai ner. Reseal immediately containers of lubricant.
Lubricant becomes moisture saturated and should not be used without proper sealing.
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Revision: 2010 May2011 QX56