ECU INFINITI QX56 2011 Factory Service Manual

GW-12
< REMOVAL AND INSTALLATION >
WINDSHIELD GLASS
Removal and Installation
INFOID:0000000006220814
REMOVAL
1. Remove front pillar garnish (LH and RH). Refer to INT-14, "Removal and Installation".
2. Remove partially headlining (front edge). Refer to INT-29, "
Removal and Installation".
3. Disconnect inside mirror harness connector.
4. Remove rain sensor cover and then disconnect rain sensor harness connector. Refer to WW-72,
"Removal and Installation".
5. Remove drip molding. Refer to EXT-43, "
Removal and Installation".
6. Remove windshield molding upper using pliers. Refer to GW-11, "
Exploded View".
7. Remove front wiper arm (LH and RH). Refer to WW-66, "
Removal and Installation".
8. Remove cowl top cover. Refer to EXT-21, "
Removal and Installation".
9. Remove front fender cover (LH and RH). Refer to EXT-21, "
Exploded View".
10. Disconnect wiper deicer harness connector (with wiper deicer).
11. Remove front pillar finisher (LH and RH). Refer to EXT-40, "
Removal and Installation".
12. Apply protective tape around the windshield glas s to protect the painted surface from damage.
13. Remove glass using piano wire or power cutting tool (A) and an inflatable pump bag (B).
NOTE:
Mark the body and the glass with matching ma rks if the windshield glass is reused.
WARNING:
Always wear safety glasses and heavy gloves to prevent injury.
CAUTION:
 Never use a cutting knife or power cutting tool when the windshield glass is reused.
 Be careful not to scratch the glass when removing.
 Never set or stand the glass on its edge. Small chips may develop into cracks.
INSTALLATION
 The dam sealant rubber and insulator should be installed in position.
 Use a genuine Nissan Urethane Adhesive Kit (if available) or an equivalent and follow the instructions pro- vided with it.
 Open a door window while the urethane adhesive is curing. This prevents the glass from being forced out by
passenger room air pressure when all door windows are closed.
 The molding must be installed securely so that it is in position and leaves no clearance.
 Inform the customer that the vehicle should rema in stationary until the urethane adhesive has completely
cured (approximately 24 hours). Curing time varies with temperature and humidity.
WARNING:
 Keep heat and open flames away as primers and adhesive are flammable.
 The materials contained in the ki t are harmful if swallowed, and may irritate skin and eyes. Never let
them come in contact with the skin and eyes.
 Use in an open, well ventilated location. Never br eathe the vapors. They may be harmful if inhaled.
Move immediately to an area with fresh air if affected by vapor inhalation.
 Driving the vehicle before the urethane adhesive has completely cured may affect the performance
of the windshield in case of an accident.
CAUTION:
 Perform adjustment of front wiper arms stop location. Refer to WW-66, "
Adjustment".
PIIB5779E
Revision: 2010 May2011 QX56

FRONT DOOR GLASSGW-19
< REMOVAL AND INSTALLATION >
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FRONT DOOR GLASS
Exploded ViewINFOID:0000000006220822
Removal and InstallationINFOID:0000000006220823
REMOVAL
1. Remove front door finisher. Refer to INT-14, "Removal and Installation".
2. Disconnect door mirror harness connector and remove the fixing clip.
3. Remove front door inside seal.
4. Remove front door pull handle bracket.
5. Remove front door speaker. Refer to AV-216, "
Removal and Installation".
6. Remove front door speaker bracket from front door panel.
7. Remove front door speaker harness from front door speaker bracket.
8. Remove front door glass sealing screen with a cutter tool. NOTE:
Cute 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.
9. Reconnect front power window main switch, and then operate the power window main switch to raise or lower front door glass until the mounting bolts can be seen.
10. Remove front door glass mounting bolts.
11. Hold securely front door glass and pull it out of the sa sh to remove the front door glass from inside or out-
side front door panel.
12. Remove front door glass run.
1. Front door panel 2. Front door glass run 3. Front door glass
4. Front door regulator 5. Front door power window motor 6. Front door pull handle bracket
7. Front door sealing screen 8. Front door lower sash 9. Grommet
10. Front door inside seal 11. Power window controller
JMKIA5208ZZ
Revision: 2010 May2011 QX56

GW-20
< REMOVAL AND INSTALLATION >
FRONT DOOR GLASS
13. Remove front door lower sash mounting bolt and pull it out of front door panel.
INSTALLATION
Install in the reverse order of removal.
Inspection and AdjustmentINFOID:0000000006220824
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

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

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
JMKIA1789ZZ
PIIB3511J
JMKIA5272ZZ
JMKIA5273ZZ
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.
JMKIA5274ZZ
Revision: 2010 May2011 QX56

REAR REGULATORGW-27
< REMOVAL AND INSTALLATION >
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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
JMKIA1789ZZ
PIIB3511J
Revision: 2010 May2011 QX56

COOLER PIPE AND HOSEHA-35
< REMOVAL AND INSTALLATION >
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 Check for leakages when recharging refrigerant. Refer to HA-18, "Leak Test".
LOW-PRESSURE FLEXIBLE HOSE
LOW-PRESSURE FLEXIBLE HOSE : Removal and InstallationINFOID:0000000006276174
CAUTION:
Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, n ever perform lubricant return operation. Refer to HA-
22, "Perform Lubricant Return Operation".
REMOVAL
1. Use a refrigerant collecting equipment (for HF C-B4a) to discharge the refrigerant. Refer to HA-22, "Per-
form Lubricant Return Operation".
2. Remove air cleaner. Refer to EM-27, "
Removal and Installation".
3. Remove the mounting bolt installed in low-pressure flexible hose from the vehicle.
4. Remove mounting bolts, and then remove low-pressure flexible hose from the vehicle. CAUTION:
Cap or wrap the joint of the A/C piping and comp ressor with suitable material such as vinyl tape to
avoid the entry of air.
INSTALLATION
Note the following items, and install in the reverse order of removal.
CAUTION:
 Replace O-rings with new ones. Then apply compressor oil to them when installing.
 Check for leakages when recharging refrigerant. Refer to HA-18, "
Leak Test".
HIGH-PRESSURE PIPE
HIGH-PRESSURE PIPE : Removal and InstallationINFOID:0000000006276175
CAUTION:
Perform lubricant return operati on before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, n ever perform lubricant return operation. Refer to HA-
22, "Perform Lubricant Return Operation".
REMOVAL
1. Use a refrigerant collecting equipment (for HF C-134a) to discharge the refrigerant. Refer to HA-22, "Per-
form Lubricant Return Operation".
2. Remove low-pressure pipe. Refer to HA-36, "
LOW-PRESSURE PIPE : Removal and Installation".
3. Remove battery. Refer to PG-164, "
Removal and Installation".
4. Remove mounting bolts, and then remove battery bracket.
5. Disconnect harness connector, harness clip and ground harness for securing work space.
6. Remove mounting bolt, and then disconnec t high-pressure pipe from condenser.
CAUTION:
Cap or wrap the joint of the A/C piping and comp ressor with suitable material such as vinyl tape to
avoid the entry of air.
7. Remove high-pressure pipe mounting nut.
8. Remove high-pressure pipe from vehicle clips (A).
: Vehicle front
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Revision: 2010 May2011 QX56

CONDENSERHA-39
< REMOVAL AND INSTALLATION >
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CAUTION:
 Replace O-rings with new ones. Then apply compressor oil to them when installing.
 Perform lubricant adjusting procedure befo re installing new condenser. Refer to HA-22, "
Lubricant
Adjusting Procedure for Components Replacement Except Compressor".
 Check for leakages when recharging refrigerant. Refer to HA-18, "
Leak Test".
LIQUID TANK
LIQUID TANK : Removal and InstallationINFOID:0000000006276180
CAUTION:
Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, n ever perform lubricant return operation. Refer to HA-
22, "Perform Lubricant Return Operation".
REMOVAL
1. Use a refrigerant collecting equipment (for HF C-134a) to discharge the refrigerant. Refer to HA-20, "Recy-
cle Refrigerant".
2. Remove front bumper fascia. Refer to EXT-13, "
Removal and Installation".
3. Clean liquid tank and its surrounding area, and then remove dust and rust from liquid tank. CAUTION:
Be sure to clean carefully.
4. Remove mounting bolts, and then remove liquid tank from the condenser. CAUTION:
Cap or wrap the joint of the A/C piping and liquid tank with suitable material such as vinyl tape to
avoid the entry of air.
INSTALLATION
Install liquid tank, and then install liquid tank bracket on condenser.
CAUTION:
 Check that liquid tank bracket is securely installe d at protrusion of condenser. (Check that liquid
tank bracket never move to a positio n below center of liquid tank.)
 Replace O-rings of the A/ C piping with new ones. Then apply comp ressor oil to them when installing.
 Perform lubricant adjusting procedure befo re installing new liquid tank. Refer to HA-22, "
Lubricant
Adjusting Procedure for Components Replacement Except Compressor".
 Check for leakages when recharging refrigerant. Refer to HA-18, "
Leak Test".
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR : Removal and InstallationINFOID:0000000006276181
CAUTION:
Perform lubricant return operation before each refrigeration system disassembly. However, if a large
amount of refrigerant or lubricant is detected, n ever perform lubricant return operation. Refer to HA-
22, "Perform Lubricant Return Operation".
REMOVAL
1. Use a refrigerant collecting equipment (for HF C-134a) to discharge the refrigerant. Refer to HA-20, "Recy-
cle Refrigerant".
2. Remove front grille. Refer to EXT-19, "
Removal and Installation".
3. Clean refrigerant pressure sensor and its surrounding area, and then remove dust and rust from refriger- ant pressure sensor.
CAUTION:
Be sure to clean carefully.
4. Disconnect refrigerant pressure sensor connector.
5. Use a adjustable wrench or other tool to hold the refrigerant pressure sensor mounting block, and then
remove the refrigerant pressure sensor from the condenser.
CAUTION:
 Be careful not to damage liquid tank.
 Be careful not to damage core surface of condenser.
 Cap or wrap the joint of the condenser and liquid tank with suitable material such as vinyl tape to
avoid the entry of air.
Revision: 2010 May2011 QX56

HAC-2
ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Automatic Intake Control (Exhaust Gas /
Outside Odor Detecting Mechanism) .....................
28
ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Plasmacluster Control .................................
29
OPERATION ......................................................30
FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM ........................................................................ ...
30
FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Switch Name and Function ....................... ...
30
REAR AUTOMATIC AIR CONDITIONING SYS-
TEM ........................................................................ ...
35
REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : Switch Name and Function ....................... ...
35
ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) ....................................................................... ...
37
ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Switch Name and Function .........................
37
DIAGNOSIS SYSTEM (HVAC) ..........................39
Description ........................................................... ...39
CONSULT-III Function ...........................................39
ECU DIAGNOSIS INFORMATION ..............42
A/C AUTO AMP. ............................................. ...42
Reference Value .................................................. ...42
Fail-safe ..................................................................45
DTC Index ..............................................................45
ECM, IPDM E/R .................................................47
List of ECU Reference ......................................... ...47
WIRING DIAGRAM .....................................48
AUTOMATIC AIR CONDITIONING SYSTEM ...48
Wiring Diagram .................................................... ...48
BASIC INSPECTION ...................................60
DIAGNOSIS AND REPAIR WORK FLOW ..... ...60
Work Flow ............................................................ ...60
OPERATION INSPECTION ............................ ...62
FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM ........................................................................ ...
62
FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Work Procedure ........................................ ...
62
REAR AUTOMATIC AIR CONDITIONING SYS-
TEM ........................................................................ ...
64
REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : Work Procedure ........................................ ...
64
ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) ....................................................................... ...
66
ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Work Procedure ..........................................
66
SYSTEM SETTING ............................................68
FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM ........................................................................ ...
68
FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Temperature Setting Trimmer (Front) ..........
68
FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Foot Position Setting Trimmer ......................
68
FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Inlet Port Memory Function (FRE) ................
69
FRONT AUTOMATIC AIR CONDITIONING SYS-
TEM : Inlet Port Memory Function (REC) ...............
69
REAR AUTOMATIC AIR CONDITIONING SYS-
TEM ........................................................................ ...
69
REAR AUTOMATIC AIR CONDITIONING SYS-
TEM : Temperature Setting Trimmer (Rear) ...........
69
ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) ....................................................................... ...
70
ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Exhaust Gas / Outside Odor Detecting
Sensor Sensitivity Adjustment Function ..................
70
ACCS (ADVANCED CLIMATE CONTROL SYS-
TEM) : Auto Intake Switch Interlocking Movement
Change Function .....................................................
70
DTC/CIRCUIT DIAGNOSIS ........................72
U1000 CAN COMM CIRCUIT ......................... ...72
Description ........................................................... ...72
DTC Logic ...............................................................72
Diagnosis Procedure ...............................................72
U1010 CONTROL UNIT (CAN) .........................73
Description ........................................................... ...73
DTC Logic ...............................................................73
Diagnosis Procedure ...............................................73
B2578, B2579 FRONT IN-VEHICLE SENSOR ...74
DTC Logic ............................................................ ...74
Diagnosis Procedure ...............................................74
Component Inspection ............................................75
B257B, B257C AMBIENT SENSOR .................77
DTC Logic ............................................................ ...77
Diagnosis Procedure ...............................................77
Component Inspection ............................................78
B2581, B2582 INTAKE SENSOR .....................80
DTC Logic ............................................................ ...80
Diagnosis Procedure ...............................................80
Component Inspection ............................................81
B262A, B262B, B2657, B2658 EXHAUST
GAS/OUTSIDE ODOR DETECTING SENSOR
...
83
DTC Logic ............................................................ ...83
Diagnosis Procedure ...............................................83
Revision: 2010 May2011 QX56