2006 INFINITI QX56 clutch

ASSEMBLYAT-309
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Revision: November 2009 2006 QX56
iii. Install brackets (1).
iv. Tighten adapter case assembly bolts to specified torque.
CAUTION:
Do not reuse self-sealing bolts (2).
35. Install needle bearing in drum support edge surface. CAUTION:
Apply petroleum jelly to needle bearing.
36. Install direct clutch assembly in reverse brake.
37. Install high and low reverse clutch assembly in direct clutch assembly.Adapter case assembly bolts : 52 N·m (5.3 kg-m,
38 ft-lb)
Self-sealing bolt : 61 N·m (6.2 kg-m,
45 ft-lb)
WCIA0563E
SCIA5198E
SCIA5019E
SCIA2306E

AT-310
ASSEMBLY
Revision: November 20092006 QX56
38. Align the drive plate using suitable tool.
39. Install high and low reverse clutch hub, mid sun gear assembly
and rear sun gear assembly as a unit.
CAUTION:
Check that portion A of high and low reverse clutch drum
protrudes approximately 2 mm (0.08 in) beyond portion B of
rear sun gear.
40. Install needle bearing in rear carrier assembly. CAUTION:
Apply petroleum jelly to needle bearing.
SCIA3169E
SCIA5018E
SCIA3130E
SCIA5179E

ASSEMBLYAT-311
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Revision: November 2009 2006 QX56
41. Install bearing race in rear carrier assembly.
CAUTION:
Apply petroleum jelly to bearing race.
42. Install rear carrier assembly in direct clutch drum.
43. Install needle bearing (rear side) in mid carrier assembly. CAUTION:
Apply petroleum jelly to needle bearing.
44. Install needle bearing (front side) in mid carrier assembly. CAUTION:
Apply petroleum jelly to needle bearing.
45. Install mid carrier assembly in rear carrier assembly.
SCIA5178E
SCIA2462E
SCIA5177E
SCIA5176E
SCIA5344E

AT-312
ASSEMBLY
Revision: November 20092006 QX56
46. Install front carrier assembly, input clutch assembly and rear
internal gear as a unit.
47. Install new seal rings in input clutch assembly. CAUTION:

Do not reuse seal rings.

Apply petroleum jelly to seal rings.
48. Install new band servo anchor end pin and lock nut in transmis- sion case.
CAUTION:
Do not reuse band servo anchor end pin.
49. Install brake band in transmission case. CAUTION:
Assemble it so that identification to avoid incorrect installa-
tion faces servo side.
50. Install front sun gear assembly to front carrier assembly. CAUTION:
Apply ATF to front sun gear radial bearing and 3rd one-way
clutch end bearing.
SCIA5173E
SCIA5269E
SCIA5016E
SCIA5498E
SCIA5014E

ASSEMBLYAT-317
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Revision: November 2009 2006 QX56
5. Tighten oil pump bolts to specified torque. Refer to AT- 2 5 0 ,
"Components" .
CAUTION:
Apply ATF to oil pump bushing.
6. Install new O-ring to input clutch assembly. CAUTION:

Do not reuse O-ring.

Apply ATF to O-ring.
7. Install converter housing to transmission case. CAUTION:
Do not reuse self-sealing bolt.
8. Make sure that brake band does not close turbine revolution sensor hole.
9. Install control valve with TCM.
a. Install A/T fluid temperature sensor 2 to bracket.
SCIA2300E
SCIA5011E
Converter housing bolt : 52 N·m (5.3 kg-m, 38 ft-lb)
Self-sealing bolt : 61 N·m (6.2 kg-m, 45 ft-lb)
SCIA5171E
SCIA5034E
SCIA5264E

ATC-1
AUTOMATIC AIR CONDITIONER
J AIR CONDITIONER
CONTENTS
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Revision: November 2009 2006 QX56
PRECAUTIONS .....................................................
..... 5
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 5
Precautions for Working with HFC-134a (R-134a) ..... 5
Contaminated Refrigerant ................................... ..... 5
General Refrigerant Precautions ......................... ..... 6
Precautions for Leak Detection Dye .................... ..... 6
A/C Identification Label ....................................... ..... 6
Precautions for Refrigerant Connection .............. ..... 7
FEATURES OF NEW TYPE REFRIGERANT
CONNECTION ................................................. ..... 7
O-RING AND REFRIGERANT CONNECTION ..... 8
Precautions for Servicing Compressor ................ .... 11
Precautions for Service Equipment ..................... .... 11
RECOVERY/RECYCLING EQUIPMENT ......... .... 11
ELECTRONIC LEAK DETECTOR ................... .... 11
VACUUM PUMP .............................................. ... 12
MANIFOLD GAUGE SET ................................. ... 12
SERVICE HOSES ............................................ ... 12
SERVICE COUPLERS ..................................... ... 13
REFRIGERANT WEIGHT SCALE ................... ... 13
CHARGING CYLINDER ................................... ... 13
PREPARATION ...................................................... ... 14
Special Service Tools .......................................... ... 14
HFC-134a (R-134a) Service Tools and Equipment ... 14
Commercial Service Tools ................................... ... 17
REFRIGERATION SYSTEM .................................. ... 18
Refrigerant Cycle ................................................ ... 18
REFRIGERANT FLOW .................................... ... 18
Refrigerant System Protection ............................ ... 18
REFRIGERANT PRESSURE SENSOR .......... ... 18
PRESSURE RELIEF VALVE ............................ ... 19
Component Layout .............................................. ... 20
FRONT REFRIGERATION SYSTEM ............... ... 20
REAR REFRIGERATION SYSTEM ................. ... 21
OIL ......................................................................... ... 22
Maintenance of Oil Quantity in Compressor ....... ... 22
OIL ................................................................... ... 22
CHECKING AND ADJUSTING ........................ ... 22AIR CONDITIONER CONTROL ............................
... 25
Description ........................................................... ... 25
Operation ............................................................. ... 25
AIR MIX DOORS CONTROL ........................... ... 25
BLOWER SPEED CONTROL .......................... ... 25
INTAKE DOOR CONTROL .............................. ... 25
MODE DOOR CONTROL ................................ ... 25
DEFROSTER DOOR CONTROL ..................... ... 25
MAGNET CLUTCH CONTROL ........................ ... 26
SELF-DIAGNOSTIC SYSTEM ......................... ... 26
Description of Control System ............................. ... 27
Control Operation ................................................... 27 DISPLAY SCREEN .............................................. 28
AUTO SWITCH ................................................ ... 28
TEMPERATURE CONTROL DIAL (TEMPERA-
TURE CONTROL) (DRIVER SIDE) .................. ... 28
TEMPERATURE CONTROL DIAL (TEMPERA-
TURE CONTROL) (PASSENGER SIDE) ......... ... 28
TEMPERATURE CONTROL DIAL (TEMPERA-
TURE AND MODE CONTROL) (REAR) .......... ... 28
RECIRCULATION () SWITCH .......................... ... 28
DEFROSTER () SWITCH ................................. ... 28
REAR WINDOW DEFOGGER SWITCH .......... ... 28
OFF SWITCH ................................................... ... 28
A/C SWITCH .................................................... ... 28
MODE SWITCH (FRONT) ................................ ... 28
FRONT BLOWER CONTROL DIAL ................. ... 28
TEMPERATURE CONTROL DIAL (TEMPERA-
TURE AND MODE CONTROL) ........................ ... 29
REAR BLOWER CONTROL DIAL ................... ... 29
Discharge Air Flow ................................................. 30 FRONT ............................................................. ... 30
REAR ............................................................... ... 30
System Description (Front) .................................. ... 31
SWITCHES AND THEIR CONTROL FUNCTION ... 31
System Description (Rear) .................................. ... 32
SWITCHES AND THEIR CONTROL FUNCTION ... 32
CAN Communication System Description ........... ... 33
TROUBLE DIAGNOSIS ......................................... ... 34
CONSULT-II Function (HVAC) ............................. ... 34

ATC-2Revision: November 20092006 QX56
CONSULT-II BASIC OPERATION ....................
... 34
SELF-DIAGNOSIS ........................................... ... 35
DATA MONITOR ............................................... ... 35
CONSULT-II Function (BCM) ............................... ... 37
CONSULT-II BASIC OPERATION .................... ... 37
DATA MONITOR ............................................... ... 38
How to Perform Trouble Diagnosis for Quick and
Accurate Repair ................................................... ... 39
WORK FLOW ................................................... ... 39
SYMPTOM TABLE ........................................... ... 39
Component Parts and Harness Connector Location ... 40
ENGINE COMPARTMENT ............................... ... 40
FRONT PASSENGER COMPARTMENT ......... ... 41
REAR PASSENGER COMPARTMENT ............... 42
Schematic ............................................................ ... 43
Wiring Diagram — A/C,A — ................................ ... 44
Front Air Control Terminals and Reference Value ... 54
PIN CONNECTOR TERMINAL LAYOUT ......... ... 54
TERMINALS AND REFERENCE VALUE FOR
FRONT AIR CONTROL .................................... ... 54
A/C System Self-diagnosis Function ................... ... 56
DESCRIPTION ................................................. ... 56
Operational Check (Front) ................................... ... 58
CHECKING MEMORY FUNCTION .................. ... 58
CHECKING BLOWER ...................................... ... 58
CHECKING DISCHARGE AIR ......................... ... 58
CHECKING RECIRCULATION (, ONLY) .......... ... 58
CHECKING TEMPERATURE DECREASE ...... ... 58
CHECKING TEMPERATURE INCREASE ....... ... 59
CHECK A/C SWITCH ....................................... ... 59
CHECKING AUTO MODE ................................ ... 59
Operational Check (Rear) .................................... ... 60
CHECKING BLOWER ...................................... ... 60
CHECKING TEMPERATURE DECREASE ...... ... 60
CHECKING TEMPERATURE INCREASE ....... ... 60
Power Supply and Ground Circuit for Front Air Con-
trol ........................................................................ ... 61
INSPECTION FLOW ........................................ ... 61
COMPONENT DESCRIPTION ......................... ... 62
DIAGNOSTIC PROCEDURE FOR A/C SYSTEM ... 62
Mode Door Motor Circuit ........................................ 64 INSPECTION FLOW ........................................ ... 64
SYSTEM DESCRIPTION ................................. ... 65
COMPONENT DESCRIPTION ......................... ... 66
DIAGNOSTIC PROCEDURE FOR MODE
DOOR MOTOR ................................................ ... 66
Air Mix Door Motor Circuit ................................... ... 70
INSPECTION FLOW ........................................ ... 70
SYSTEM DESCRIPTION ................................. ... 71
COMPONENT DESCRIPTION ......................... ... 72
DIAGNOSTIC PROCEDURE FOR AIR MIX
DOOR MOTOR (DRIVER) ................................ ... 72
DIAGNOSTIC PROCEDURE FOR AIR MIX
DOOR MOTOR (PASSENGER) ....................... ... 76
DIAGNOSTIC PROCEDURE FOR AIR MIX
DOOR MOTOR (REAR) ................................... ... 79
Intake Door Motor Circuit ..................................... ... 83
INSPECTION FLOW ........................................ ... 83
SYSTEM DESCRIPTION ................................. ... 84COMPONENT DESCRIPTION .........................
... 85
DIAGNOSTIC PROCEDURE FOR INTAKE
DOOR MOTOR ................................................. ... 85
Defroster Door Motor Circuit ................................ ... 87
SYMPTOM: ....................................................... ... 87
INSPECTION FLOW ......................................... ... 87
SYSTEM DESCRIPTION .................................. ... 88
COMPONENT DESCRIPTION ......................... ... 88
DIAGNOSTIC PROCEDURE FOR
DEFROSTER DOOR MOTOR .......................... ... 89
Front Blower Motor Circuit ................................... ... 93
INSPECTION FLOW ......................................... ... 93
SYSTEM DESCRIPTION .................................. ... 94
COMPONENT DESCRIPTION ......................... ... 95
DIAGNOSTIC PROCEDURE FOR BLOWER
MOTOR ............................................................. ... 95
COMPONENT INSPECTION ............................ .100
Rear Blower Motor Circuit .................................... .101
INSPECTION FLOW ......................................... .101
SYSTEM DESCRIPTION .................................. .102
DIAGNOSTIC PROCEDURE FOR REAR
BLOWER MOTOR ............................................ .102
COMPONENT INSPECTION ............................ .110
Rear Air Control Circuit ........................................ .112
INSPECTION FLOW ......................................... .112
SYSTEM DESCRIPTION .................................. .113
DIAGNOSTIC PROCEDURE FOR REAR AIR
CONTROL ........................................................ .113
Magnet Clutch Circuit ........................................... .115
INSPECTION FLOW ......................................... .115
SYSTEM DESCRIPTION .................................. .116
DIAGNOSTIC PROCEDURE FOR MAGNET
CLUTCH ........................................................... .116
Insufficient Cooling ............................................... .121
INSPECTION FLOW ......................................... .121
PERFORMANCE TEST DIAGNOSES ............. .122
PERFORMANCE CHART ................................. .124
TROUBLE DIAGNOSES FOR UNUSUAL PRES-
SURE ................................................................ .125
Insufficient Heating .............................................. .128
INSPECTION FLOW ......................................... .128
Noise .................................................................... .129
INSPECTION FLOW ......................................... .129
Self-diagnosis ...................................................... .130
INSPECTION FLOW ......................................... .130
Memory Function ................................................. .131
INSPECTION FLOW ......................................... .131
Water Valve Circuit ............................................... .132
COMPONENT DESCRIPTION ......................... .132
DIAGNOSTIC PROCEDURE FOR WATER
VALVE ............................................................... .132
Ambient Sensor Circuit ........................................ .134
COMPONENT DESCRIPTION ......................... .134
AMBIENT TEMPERATURE INPUT PROCESS .134
DIAGNOSTIC PROCEDURE FOR AMBIENT
SENSOR ........................................................... .134
COMPONENT INSPECTION ............................ .136
In-vehicle Sensor Circuit ...................................... .137
COMPONENT DESCRIPTION ......................... .137

ATC-3
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DIAGNOSTIC PROCEDURE FOR IN-VEHICLE
SENSOR ..........................................................
. 138
COMPONENT INSPECTION ........................... . 140
Optical Sensor Circuit ......................................... . 140
COMPONENT DESCRIPTION ........................ . 140
OPTICAL INPUT PROCESS ........................... . 140
DIAGNOSTIC PROCEDURE FOR OPTICAL
SENSOR .......................................................... . 141
Intake Sensor Circuit ........................................... . 142
COMPONENT DESCRIPTION ........................ . 142
DIAGNOSTIC PROCEDURE FOR INTAKE SEN-
SOR ................................................................. . 142
COMPONENT INSPECTION ........................... . 143
CONTROL UNIT .................................................... . 144
Removal and Installation ..................................... . 144
FRONT AIR CONTROL ................................... . 144
REAR AIR CONTROL ...................................... . 144
AMBIENT SENSOR ............................................... . 145
Removal and Installation ..................................... . 145
REMOVAL ........................................................ . 145
INSTALLATION ................................................ . 145
IN-VEHICLE SENSOR ........................................... . 146
Removal and Installation ..................................... . 146
REMOVAL ........................................................ . 146
INSTALLATION ................................................ . 146
OPTICAL SENSOR ............................................... . 147
Removal and Installation ..................................... . 147
INTAKE SENSOR .................................................. . 148
Removal and Installation ..................................... . 148
REMOVAL ........................................................ . 148
INSTALLATION ................................................ . 148
BLOWER MOTOR ................................................. . 149
Components ........................................................ . 149
Removal and Installation ..................................... . 149
FRONT BLOWER MOTOR .............................. . 149
REAR BLOWER MOTOR ................................ . 150
IN-CABIN MICROFILTER ...................................... . 151
Removal and Installation ..................................... . 151
FUNCTION ....................................................... . 151
REPLACEMENT TIMING ................................. . 151
REPLACEMENT PROCEDURE ...................... . 151
HEATER & COOLING UNIT ASSEMBLY ............. . 153
Components ........................................................ . 153
Removal and Installation ..................................... . 154
FRONT HEATER AND COOLING UNIT ASSEM-
BLY ................................................................... . 154
REAR HEATER AND COOLING UNIT ASSEM-
BLY ................................................................... . 155
HEATER CORE ..................................................... . 156
Components ........................................................ . 156
Removal and Installation ..................................... . 157
FRONT HEATER CORE .................................. . 157
REAR HEATER CORE .................................... . 158
DEFROSTER DOOR MOTOR ............................... . 159
Removal and Installation ..................................... . 159
REMOVAL ........................................................ . 159
INSTALLATION ................................................ . 159INTAKE DOOR MOTOR ........................................
.160
Removal and Installation ..................................... .160
REMOVAL ........................................................ .160
INSTALLATION ................................................ .160
MODE DOOR MOTOR ........................................... .161
Removal and Installation ..................................... .161
REMOVAL ........................................................ .161
INSTALLATION ................................................ .161
AIR MIX DOOR MOTOR ........................................ .162
Components ........................................................ .162
Removal and Installation ..................................... .162
FRONT AIR MIX DOOR MOTOR (DRIVER) .... .162
FRONT AIR MIX DOOR MOTOR (PASSENGER) .163
REAR AIR MIX DOOR MOTOR ....................... .163
VARIABLE BLOWER CONTROL .......................... .164
Removal and Installation ..................................... .164
REMOVAL ........................................................ .164
INSTALLATION ................................................ .164
REAR BLOWER MOTOR RESISTOR ................... .165
Removal and Installation ..................................... .165
REMOVAL ........................................................ .165
INSTALLATION ................................................ .165
DUCTS AND GRILLES .......................................... .166
Components ........................................................ .166
Removal and Installation ..................................... .169
CENTER CONSOLE HEAT DUCT AND REAR
FINISHER ASSEMBLY GRILLE ....................... .169
DEFROSTER NOZZLE .................................... .169
RH AND LH SIDE DEMISTER DUCT .............. .169
RH AND LH VENTILATOR DUCT .................... .169
CENTER VENTILATOR DUCT ........................ .169
FLOOR DUCT .................................................. .169
REAR OVERHEAD DUCTS ............................. .170
REAR FLOOR DUCT ....................................... .170
GRILLES .......................................................... .170
REFRIGERANT LINES .......................................... .171
HFC-134a (R-134a) Service Procedure .............. .171
SETTING OF SERVICE TOOLS AND EQUIP-
MENT ............................................................... .171
Components ........................................................ .173
Removal and Installation for Compressor ........... .175
REMOVAL ........................................................ .175
INSTALLATION ................................................ .176
Removal and Installation for Compressor Clutch . 176 REMOVAL ........................................................ .176
INSPECTION ................................................... .177
INSTALLATION ................................................ .177
BREAK-IN OPERATION ................................... .179
Removal and Installation for Low-pressure Flexible
Hose .................................................................... .179
REMOVAL ........................................................ .179
INSTALLATION ................................................ .179
Removal and Installation for High-pressure Flexible
Hose .................................................................... .179
REMOVAL ........................................................ .179
INSTALLATION ................................................ .179
Removal and Installation for High-pressure Pipe . 179 REMOVAL ........................................................ .179
INSTALLATION ................................................ .179