2011 INFINITI QX56 lock

TM-210
< UNIT REMOVAL AND INSTALLATION >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
 When installing A/T assembly to the engine, attach the fixing bolts
in accordance with the following standard.
*: Tightening the bolt with bracket (and washer). Refer to TM-200, "4WD : Exploded View".
 Align the positions of tightening bolts for drive plate with those of the torque converter, and temporarily
tighten the bolts. Then, tighten the bolts with the specified torque.
CAUTION:
 When turning crankshaft, turn it clockwi se as viewed from the front of the engine.
 When tightening the tightening bolts for the torque converter after fixing the crankshaft pulley
bolts, be sure to confirm the tightening torque of the crankshaft pulley mounting bolts. Refer to
EM-62, "
Removal and Installation".
 Rotate crankshaft several turns and check to be sure that A/T rotates freely without binding after
converter is installed to drive plate.
4WD : Inspection and AdjustmentINFOID:0000000006226912
INSPECTION AFTER INSTALLATION
 Check A/T fluid leakage.
 Check A/T position after adjusting A/T position. Refer to TM-101, "
Inspection".
ADJUSTMENT AFTER INSTALLATION
 Adjust A/T fluid level. Refer to TM-95, "Adjustment".
 Adjust A/T position. Refer to TM-101, "
Inspection".
 Perform decel G sensor calibration w hen replacing A/T assembly. Refer to TM-91, "
Special Repair Require-
ment".
Bolt symbol A
Insertion direction A/T assembly to engine
Number of bolts 9
Bolt length “L”
mm (in) 70 (2.76)
Tightening torque
N·m (kg-m, ft-lb) 113 (12, 83)
JSDIA1598ZZ
Revision: 2010 May2011 QX56

TM-256
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
40. Install input clutch assembly (with front carrier assembly and
rear internal gear) (1) to transmission case.
CAUTION:
Check that the needle bearing (2) is securely positioned. If
the needle bearing position is misaligned, adjust it to the
specified position.
41. Install 1st one-way clutch (1) to front brake hub (with under drive carrier) (2).
42. Check operation of 1st one-way clutch.
a. Hold 1st one-way clutch.
b. Check front brake hub for correct locking and unlocking direc- tions.
CAUTION:
If not shown in figure, check installati on direction of 1st one-way clutch.
43. Install under drive carrier (with 1st one-way clutch) (1) to trans- mission case.
JSDIA1714ZZ
: Unlocked
: Locked
JSDIA1713ZZ
JSDIA1715ZZ
Revision: 2010 May2011 QX56

TM-268
< UNIT DISASSEMBLY AND ASSEMBLY >[7AT: RE7R01B]
TRANSMISSION ASSEMBLY
Check torque converter one-way clutch using a check tool as shown
at figure.
1. Insert a check tool into the groove of bearing support built into
one-way clutch outer race.
2. When fixing bearing support with a check tool, rotate one-way clutch spline using a screwdriver.
3. Make sure that inner race rotates clockwise only. If not, replace
torque converter assembly.
1st One-way Clutch
Check operation of 1st one-way clutch.
1. Install 1st one-way clutch (1) to front brake hub (with under drivecarrier).
2. Hold 1st one-way clutch.
3. Check front brake hub for correct locking and unlocking direc- tions. If necessary, replace 1st one-way clutch.
Under Drive Sun Gear
Check for deformation, fatigue or damage. If necessary, replace the under drive sun gear.
Mid Carrier Assembly
Check for deformation, fatigue or damage. If necessary, replace the mid carrier assembly.
Rear Carrier Assembly
Check for deformation, fatigue or damage. If necessary, replace the rear carrier assembly.
Reverse Brake Drive Plates
Check facing for burns, cracks or damage. If necessary, replace the plate.
Reverse Brake Retaining Plate, Driven Plates and Dish Plates
Check facing for burns, cracks or damage. If necessary, replace the plate.
Each Snap Ring
Check for deformation, fatigue or damage. If necessary, replace the snap ring.
Parking Actuator Support and Parking Pawl
SCIA3171E
: Unlocked
: Locked
JSDIA1713ZZ
Revision: 2010 May2011 QX56

MID SUN GEAR, REAR SUN GEAR, HIGH AND LOW REVERSE CLUTCH HUB
TM-291
< UNIT DISASSEMBLY AND ASSEMBLY > [7AT: RE7R01B]
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a. Hold mid sun gear and turn rear sun gear.
b. Check 2nd one-way clutch for correct locking and unlocking directions.
CAUTION:
If not as shown in the figure, check installation direction of
2nd one-way clutch.
9. Install needle bearing and bearing races to high and low reverse clutch hub.
CAUTION:
Check the direction of needle bearing. Refer to TM-222,
"Location of Needle Bearings and Bearing Races".
InspectionINFOID:0000000006226935
INSPECTION AFTER REMOVAL
2nd One-way Clutch
1. Hold mid sun gear and turn rear sun gear.
2. Check 2nd one-way clutch for correct locking and unlocking
directions. If necessary, replace 2nd one-way clutch.
High and Low Reverse Clutch Hub Snap Ring, Rear Sun Gear Snap Ring
Check for deformation, fatigue or damage. If necessary, replace the snap ring.
2nd One-way Clutch
Check frictional surface for wear or damage. If necessary, replace the 2nd one-way clutch.
Mid Sun Gear
Check for deformation, fatigue or damage. If necessary, replace the mid sun gear.
Rear Sun Gear
Check for deformation, fatigue or damage. If necessary, replace the rear sun gear.
High and Low Reverse Clutch Hub
Check for deformation, fatigue or damage. If nece ssary, replace the high and low reverse clutch hub.
SCIA3132E
SCIA5238E
SCIA3132E
Revision: 2010 May2011 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)
TM-297
< SERVICE DATA AND SPECIFICATIONS (SDS) [7AT: RE7R01B]
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Unit: km/h (MPH)
 At half throttle, the accelerator opening is 4/8 of the full opening.
 The vehicle speed included in the above table is a speed with the tow mode ON and a heavy load towed.
Vehicle Speed at Which Lock-up Occurs/ReleasesINFOID:0000000006226946
 Vehicle speed with D5 position.
 At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal OFF)
 At half throttle, the accelerator opening is 4/8 of the full opening.
Stall SpeedINFOID:0000000006226947
2WD MODELS
4WD MODELS
*: Refer to DLN-18, "4WD SYSTEM : System Description".
Torque ConverterINFOID:0000000006226948
Gear position Throttle position
Full throttle Half throttle
D
1 → D257 – 61 (35 – 38) 50 – 54 (31 – 34)
D
2 → D389 – 97 (55 – 60) 76 – 84 (47 – 52)
D
3 → D4141 – 151 (88 – 94) 116 – 126 (72 – 78)
D
4 → D5205 – 215 (127 – 134) 159 – 169 (99 – 105)
D
5 → D6251 – 261 (156 – 162) 189 – 199 (117 – 124)
D
6 → D7251 – 261 (156 – 162) 215 – 225 (134 – 140)
D
7 → D6240 – 250 (149 – 155) 161 – 171 (100 – 106)
D
6 → D5240 – 250 (149 – 155) 130 – 140 (81 – 87)
D
5 → D4180 – 190 (112 – 118) 84 – 94 (52 – 58)
D
4 → D3126 – 136 (78 – 85) 58 – 68 (36 – 42)
D
3 → D266 – 74 (41 – 46) 30 – 38 (19 – 24)
D
2 → D124 – 28 (15 – 17) 10 – 14 (6 – 9)
Throttle position Vehicle speed km/h (MPH)
Lock-up ON Lock-up OFF
Closed throttle 50 – 58 (31 – 36) 50 – 58 (31 – 36)
Half throttle 163 – 171 (101 – 106) 163 – 171 (101 – 106)
Sta ll sp ee d 1,777 – 2,077 rpm
4WD shift switch* AUTO, 4H 4L
Stall speed 1,777 – 2,077 rpm 1,540 – 1,840 rpm
Dimension between end of converter housing and torque converter 24.0 mm (0.94 in)
Revision: 2010 May2011 QX56

PRECAUTIONSVTL-3
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006376373
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:0000000006376453
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

VTL-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.
Revision: 2010 May2011 QX56

WCS-6
< SYSTEM DESCRIPTION >
SYSTEM
SYSTEM
WARNING CHIME SYSTEM
WARNING CHIME SYSTEM : System DiagramINFOID:0000000006222683
WARNING CHIME SYSTEM : System DescriptionINFOID:0000000006222684
COMBINATION METER
The combination meter sounds the alarm buzzer install ed in the combination meter when receiving the buzzer
output signal transmitted from each unit.
BCM
BCM receives signals from various units and transmits a buzzer output signal to the combination meter via
CAN communication if it judges that the warning buzzer should be activated.
WARNING CHIME FUNCTION LIST
JSNIA3116GB
Warning functions Out line Warning judgment unit Refer to
Light reminder warning chime The warning chime sounds when the ignition
s w i t c h i s i n O F F o r A C C p o s i t i o n w i t h t h e c o m -
bination switch (lighting switch) in the 1st or
2nd position and the driver side door open. BCMWCS-8,
"LIGHT RE-
MINDER
WARNING
CHIME : Sys-
tem Descrip-
tion"
Front fog light reminder warning chime
The warning chime sounds when the ignition
switch is turned to LOCK, OFF or ACC posi-
tion from ON position, with combination switch
(lighting switch) is in AUTO position and the
front fog lamp switch in ON position. BCMWCS-10,
"FRONT FOG
LIGHT RE-
MINDER
WARNING
CHIME : Sys-
tem Descrip-
tion"
Revision: 2010 May2011 QX56