lock INFINITI QX56 2011 Factory Service Manual

TM-5
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Assembly .............................................................
..
284
Inspection ..............................................................286
MID SUN GEAR, REAR SUN GEAR, HIGH
AND LOW REVERSE CLUTCH HUB ..............
287
Exploded View .................................................... ..287
Disassembly ..........................................................287
Assembly ...............................................................289
Inspection ..............................................................291
HIGH AND LOW REVERSE CLUTCH .............292
Exploded View .................................................... ..292
Disassembly ..........................................................292
Assembly ...............................................................293
Inspection ..............................................................293
DIRECT CLUTCH .............................................294
Exploded View .................................................... ..294
Disassembly ..........................................................294
Assembly ............................................................. ..294
Inspection ..............................................................295
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... ...........................................
296
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
296
General Specification .......................................... ..296
Vehicle Speed at Which Gear Shifting Occurs ......296
Vehicle Speed at Which Lock-up Occurs/Releas-
es ...........................................................................
297
Stall Speed ............................................................297
Torque Converter ..................................................297
Total End Play .......................................................298
Reverse Brake Clearance .....................................298
Front Brake Clearance ..........................................298
2346 Brake Clearance ...........................................298
Revision: 2010 May2011 QX56

PRECAUTIONSTM-7
< PRECAUTION > [7AT: RE7R01B]
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 Disassembly should be done in a clean work area.
 Use lint-free paper or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the transmission.
 Place disassembled parts in order for easier and proper assembly.
 All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.
 Gaskets, seals and O-rings should be repl aced any time the A/T is disassembled.
 It is very important to perform func tional tests whenever they are indicated.
 The valve body contains precision parts and requires extreme care when parts are removed and serviced.
Place disassembled valve body parts in order for easier and proper assembly. Care will also prevent springs
and small parts from becoming scattered or lost.
 Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.
 Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings and
seals, or hold bearings and washers in place during assembly. Never use grease.
 Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
 When the A/T drain plug is removed, only some of the ATF is drained. Old ATF will remain in torque con- verter and ATF cooling system.
Always follow the procedures under “Changing” when changing ATF. Refer to TM-94, "
Changing".
 Occasionally, the parking gear may be locked with the to rque insufficiently released, when stopping the vehi-
cle by shifting the selector lever from “D” or “R” to “P” position with the brake pedal depressed.
In this case, the shock with a thud caused by the abrupt release of torque may occur when shifting the selec-
tor lever from “P” posit ion to other positions.
However, this symptom is not a malfunction which results in the damage of parts.
Service Notice or PrecautionINFOID:0000000006274263
ATF COOLER SERVICE
If ATF contains frictional material (clutches, bands, etc. ), or if an A/T is repaired, overhauled, or replaced,
inspect and clean the A/T fluid cooler mounted in the radiat or or replace the radiator. Flush cooler lines using
cleaning solvent and compressed air after repair. For A/T fluid cooler cleaning procedure, refer to TM-97,
"Cleaning". For radiator replacement, refer to CO-13, "Exploded View".
Revision: 2010 May2011 QX56

COMPONENT PARTSTM-11
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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NOTE:
The following components are included in the control valve & TCM (17).
TCM
 Input speed sensor 1, 2
 A/T fluid temperature sensor
 Transmission range switch
 Direct clutch solenoid valve
 High and low reverse clutch solenoid valve
 Input clutch solenoid valve
 Front brake solenoid valve
 Low brake solenoid valve
 Anti-interlock solenoid valve
 2346 brake solenoid valve
 Line pressure solenoid valve
 Torque converter clutch solenoid valve
A/T CONTROL SYSTEM : Component DescriptionINFOID:0000000006226739
Name Function
TCM TM-12, "
A/T CONTROL SYSTEM : TCM"
Transmission range switchTM-12, "A/T CONTROL SYSTEM : Transmission Range Switch"
Output speed sensor TM-12, "A/T CONTROL SYSTEM : Output Speed Sensor"
Input speed sensor 1
TM-12, "A/T CONTROL SYSTEM : Input Speed Sensor"Input speed sensor 2
A/T fluid temperature sensorTM-12, "
A/T CONTROL SYSTEM : A/T Fluid Temperature Sensor"
Input clutch solenoid valve TM-12, "A/T CONTROL SYSTEM : Input Clutch Solenoid Valve"
Front brake solenoid valve TM-12, "A/T CONTROL SYSTEM : Front Brake Solenoid Valve"
Direct clutch solenoid valveTM-12, "A/T CONTROL SYSTEM : Direct Clutch Solenoid Valve"
High and low reverse clutch solenoid valveTM-13, "A/T CONTROL SYSTEM : High and Low Reverse Clutch Solenoid Valve"
Low brake solenoid valve TM-13, "A/T CONTROL SYSTEM : Low Brake Solenoid Valve"
Anti-interlock solenoid valve TM-13, "A/T CONTROL SYSTEM : Anti-interlock Solenoid Valve"
2346 brake solenoid valve TM-13, "A/T CONTROL SYSTEM : 2346 Brake Solenoid Valve"
Torque converter clutch solenoid valveTM-13, "A/T CONTROL SYSTEM : Torque Converter Clutch Solenoid Valve"
Line pressure solenoid valve TM-13, "A/T CONTROL SYSTEM : Line Pressure Solenoid Valve"
Accelerator pedal position sensor TM-13, "A/T CONTROL SYSTEM : Accelerator Pedal Position Sensor"
Manual mode switch TM-13, "A/T CONTROL SYSTEM : Manual Mode Switch"
Tow mode switch TM-14, "A/T CONTROL SYSTEM : Tow Mode Switch"
A/T CHECK indicator lampTM-14, "A/T CONTROL SYSTEM : A/T CHECK Indicator Lamp"
Tow mode indicator lamp* TM-14, "A/T CONTROL SYSTEM : Tow Mode Indicator Lamp"
Selector lever position indicator TM-14, "A/T CONTROL SYSTEM : Selector Lever Position Indicator"
Stop lamp switch BRC-15, "Stop Lamp Switch"
Yaw rate/side G sensorBRC-15, "Yaw Rate/Side/Decel G sensor"
Starter relay STR-6, "System Description"
ECMEC-35, "ENGINE CONTROL SYSTEM : System Description"
BCM BCS-6, "BODY CONTROL SYSTEM : System Description"
Combination meter MWI-9, "METER SYSTEM : System Description"
ABS actuator and electric unit (control unit) BRC-16, "System Description"
Revision: 2010 May2011 QX56

COMPONENT PARTSTM-13
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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A/T CONTROL SYSTEM : High and Lo w Reverse Clutch Solenoid ValveINFOID:0000000006226748
 The high and low reverse clutch solenoid valve is controlled by the TCM in response to signals transmitted
from the transmission range switch, output speed sens or and accelerator pedal position sensor. Gears will
then be shifted to the optimum position.
 The high and low reverse clutch solenoid valve controls the high and low reverse clutch control valve in response to a signal transmitted from the TCM.
A/T CONTROL SYSTEM : Lo w Brake Solenoid ValveINFOID:0000000006226749
 The low brake solenoid valve is controlled by the TC M in response to signals transmitted from the transmis-
sion range switch, output speed sensor and accelerator pedal position sensor. Gears will then be shifted to
the optimum position.
 The low brake solenoid valve controls the low brake control valve in response to a signal transmitted from
the TCM.
A/T CONTROL SYSTEM : Anti-interlock Solenoid ValveINFOID:0000000006226750
 Anti-interlock solenoid valve prevents the simultaneous activation of the input clutch and the low brake.
 The anti-interlock solenoid valve is an ON/OFF type solenoid valve.
A/T CONTROL SYSTEM : 2 346 Brake Solenoid ValveINFOID:0000000006226751
 The 2346 brake solenoid valve is controlled by the TC M in response to signals transmitted from the trans-
mission range switch, output speed sensor and accelera tor pedal position sensor. Gears will then be shifted
to the optimum position.
 The 2346 brake solenoid valve controls the 2346 brake c ontrol valve in response to a signal transmitted from
the TCM.
A/T CONTROL SYSTEM : Torque Co nverter Clutch Solenoid ValveINFOID:0000000006226752
The torque converter clutch solenoid va lve is activated, with the gear in D2, D3, D4, D5, D6, D7, M2, M3, M4,
M5, M6 and M7 by the TCM in response to signals tr ansmitted from the output speed sensor and accelerator
pedal position sensor. Torque converter clut ch piston operation will then be controlled.
A/T CONTROL SYSTEM : Line Pressure Solenoid ValveINFOID:0000000006226753
The line pressure solenoid valve regulates the oil pum p discharge pressure to suit the driving condition in
response to a signal transmitted from the TCM.
A/T CONTROL SYSTEM : Accele rator Pedal Position SensorINFOID:0000000006226754
 The accelerator pedal position sensor is installed on the upper end of the accelerator pedal assembly.
 The accelerator pedal position sensor detects the accelerator position.
 The accelerator pedal position sensor transform the a ccelerator pedal position into output voltage, and emit
the voltage signal to the ECM. Then, the TCM receives accelerator pedal position signal from the ECM via
CAN communication.
A/T CONTROL SYSTEM : Manual Mode SwitchINFOID:0000000006226755
 The manual mode switch [mode select switch and position se lect switch (shift-up/shift-down)] is installed in
the A/T shift selector assembly.
 The mode select switch detects the position (the main shift gate side or manual shift gate side) of the selec-
tor lever and transmits a manual mode signal or a not manual mode signal to the combination meter. Then,
the TCM receives a manual mode signal or non-manual mode signal from the combination meter.
 The position select switch (shift-up) detects that the se lector lever is shifted to the shift-up side of the manual
shift gate and transmits a manual mode shift up signal to the combination meter. Then, the TCM receives a
manual mode shift up signal from the combination meter.
 The position select switch (shift-down) detects that the selector lever is shifted to the shift-down side of the
manual shift gate and transmits a manual mode shift down signal to the combination meter. Then, the TCM
receives a manual mode shift down signal from the combination meter.
Revision: 2010 May2011 QX56

TM-14
< SYSTEM DESCRIPTION >[7AT: RE7R01B]
COMPONENT PARTS
A/T CONTROL SYSTEM : Tow Mode Switch
INFOID:0000000006226756
 Tow mode switch is integrated in to
 Tow mode switch is integrated in to SNOW MODE /TOW MODE/VDC OFF switch assembly (2WD models)
or 4WD switch assembly (4WD models).
 When tow mode switch is pressed while tow mode indicator lamp on combination meter is OFF, the tow mode turns ON and tow mode indicator lamp turns ON.
 When tow mode switch is pressed while tow mode indicator lamp on combination meter is ON, the tow mode
turns OFF and tow mode indicator lamp turns OFF.
A/T CONTROL SYSTEM : A/ T CHECK Indicator LampINFOID:0000000006226757
A/T CHECK INDICATOR LAMP
Turns ON when ignition switch turns ON and turns OFF when the system is normal, for bulb check purposes.
A/T CONTROL SYSTEM : Tow Mode Indicator LampINFOID:0000000006226758
TOW MODE INDICATOR LAMP
Turns ON when tow mode is switched to operational status (ON) by tow mode switch.
A/T CONTROL SYSTEM : Selector Lever Position IndicatorINFOID:0000000006226759
Indicates selector lever position.
A/T SHIFT LOCK SYSTEM
Condition (status) A/T CHECK indicator lamp
Ignition switch OFF OFF
For approx. 2 seconds after the ignition switch is turned ON ON
Approx. 2 seconds after ignition switch is turned ON OFF
A/T is malfunctioning OFF
Condition (status) Tow mode indicator lamp
Ignition switch OFF OFF
When ignition switch turns ON OFF
Press tow mode switch while tow mode indicator lamp is OFF. ON
Press tow mode switch while tow mode indicator lamp is ON. OFF
Revision: 2010 May2011 QX56

COMPONENT PARTSTM-15
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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A/T SHIFT LOCK SYSTEM : Component Parts LocationINFOID:0000000006226760
A/T SHIFT LOCK SYSTEM : Component DescriptionINFOID:0000000006226761
1. Stop lamp switch
Refer to BRC-10, "
Component Parts
Location". 2. Shift lock cover * 3. Shift lock solenoid
4. Park position switch
A. Center console B. A/T shift selector assembly
*: Shift lock release button becomes operative by removing shift lock cover.
JSDIA1695GB
Component Function
Shift lock solenoid It operates according to the signal from the stop lamp switch and moves the lock lever.
Lock lever It moves according to the operation of the shift lock solenoid and performs the release of
the shift lock.
Detent rod It links with the selector button and restricts the selector lever movement.
Park position switch It detects that the selector lever is in “P” position.
Shift lock release button It moves the lock lever forcibly.
Revision: 2010 May2011 QX56

STRUCTURE AND OPERATIONTM-23
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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Front planetary gear
Under drive planetary gear
Rear planetary gear
Mid planetary gear
“M1” Position
Name Front sun gear Front carrier Front internal gear
Condition — Output Input
Direction of rotation Counterc lockwise revolution Clockwise revolution Clockwise revolution
Number of revolutions Deceleration from front internal
gear Deceleration from front internal
gear Same number of revolution as the
input shaft
Name Under drive sun gear Under drive carrier Under drive internal gear
Condition — Fixed Input/Output
Direction of rotation Counterclockwi se revolution — Clockwise revolution
Number of revolutions Acceleration from under drive in-
ternal gear —
Same number of revolution as the
front carrier
Name Rear sun gear Rear carrier Rear internal gear
Condition Fixed Output Input
Direction of rotation — Clockwise revolution Clockwise revolution
Number of revolutions — Deceleration from rear internal
gear Same number of revolution as the
under drive internal gear
Name Mid sun gear Mid carrier Mid internal gear
Condition Fixed Output Input
Direction of rotation — Clockwise revolution Clockwise revolution
Number of revolutions — Deceleration from mid internal
gear Same number of revolution as the
rear carrier
Revision: 2010 May2011 QX56

TM-24
< SYSTEM DESCRIPTION >[7AT: RE7R01B]
STRUCTURE AND OPERATION
 The 1st one-way clutch and the front brake regulate c
ounterclockwise rotation of the under drive carrier.
NOTE:
The front brake operates only while coasting.
 The 2nd one-way clutch and the high and low reverse clutch regulate counterclockwise rotation of the rear
sun gear.
NOTE:
The high and low reverse clutch operates only while coasting.
 The mid sun gear is fixed by the low brake.
JSDIA0867GB
Revision: 2010 May2011 QX56

STRUCTURE AND OPERATIONTM-25
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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 Each planetary gear enters the state described below.
Front planetary gear
Under drive planetary gear
Rear planetary gear
Mid planetary gear
“D2” Position
Name Front sun gear Front carrier Front internal gear
Condition — Output Input
Direction of rotation Counterc lockwise revolution Clockwise revolution Clockwise revolution
Number of revolutions Deceleration from front internal
gear Deceleration from front internal
gear Same number of revolution as the
input shaft
Name Under drive sun gear Under drive carrier Under drive internal gear
Condition — Fixed Input/Output
Direction of rotation Counterclockwi se revolution — Clockwise revolution
Number of revolutions Acceleration from under drive in-
ternal gear —Same number of revolution as the
front carrier
Name Rear sun gear Rear carrier Rear internal gear
Condition Fixed Output Input
Direction of rotation — Clockwise revolution Clockwise revolution
Number of revolutions — Deceleration from rear internal
gear Same number of revolution as the
under drive internal gear
Name Mid sun gear Mid carrier Mid internal gear
Condition Fixed Output Input
Direction of rotation — Clockwise revolution Clockwise revolution
Number of revolutions — Deceleration from mid internal
gear Same number of revolution as the
rear carrier
Revision: 2010 May2011 QX56

STRUCTURE AND OPERATIONTM-27
< SYSTEM DESCRIPTION > [7AT: RE7R01B]
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Front planetary gear
Under drive planetary gear
Rear planetary gear
Mid planetary gear
“M2” Position
Name Front sun gear Front carrier Front internal gear
Condition Fixed Output Input
Direction of rotation — Clockwise revolution Clockwise revolution
Number of revolutions — Deceleration from front internal
gear Same number of revolution as the
input shaft
Name Under drive sun gear Under drive carrier Under drive internal gear
Condition Fixed — Input/Output
Direction of rotation — Clockwise revolution Clockwise revolution
Number of revolutions — Deceleration from under drive in-
ternal gear Same number of revolution as the
front carrier
Name Rear sun gear Rear carrier Rear internal gear
Condition Fixed Output Input
Direction of rotation — Clockwise revolution Clockwise revolution
Number of revolutions — Deceleration from rear internal
gear Same number of revolution as the
under drive internal gear
Name Mid sun gear Mid carrier Mid internal gear
Condition Fixed Output Input
Direction of rotation — Clockwise revolution Clockwise revolution
Number of revolutions — Deceleration from mid internal
gear Same number of revolution as the
rear carrier
Revision: 2010 May2011 QX56