INFINITI QX56 2011 Factory Service Manual

SYSTEM SYMPTOMTM-173
< SYMPTOM DIAGNOSIS > [7AT: RE7R01B]
C
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B
TM
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*: Parts behind drum support is impossible to perform inspection by disassembly. Refer to TM-16, "TRANSMISSION : Cross-Sectional
View".
Func-
tion
trouble
Poor
pow-
er
trans-
mis-
sion
Slip With selector lever
in “D” position, ac-
celeration is ex-
tremely poor.
112 1 12
With selector lever
in “R” position, ac-
celeration is ex-
tremely poor. 11 11112
While starting off
by accelerating in
1GR, engine rac-
es. 112 1112
While accelerating
in 2GR, engine
races. 1 2 1 112
While accelerating
in 3GR, engine
races. 1 2 11 12
While accelerating
in 4GR, engine
races. 1 1 11 12
While accelerating
in 5GR, engine
races. 1 111 12
While accelerating
in 6GR, engine
races. 111112
While accelerating
in 7GR, engine
races. 1 111 2
Lock-up 1 1 1 2
No creep at all. 11211111 11121
Extremely large
creep. 1
Symptom
Diagnostic item
Oil pump
Torque converter
Low brake*
Front brake
High and low reverse clutch
Input clutch
Direct clutch
2346 brake
Reverse brake
1st one-way clutch
2nd one-way clutch
gear
control valve
Parking component
TM-270
TM-211TM-211TM-211TM-292TM-282TM-294TM-270TM-211TM-211TM-287TM-211TM-182TM-211
Revision: 2010 May2011 QX56

TM-174
< SYMPTOM DIAGNOSIS >[7AT: RE7R01B]
SYSTEM SYMPTOM
*: Parts behind drum support is impossible to perform inspection by disassembly. Refer to
TM-16, "TRANSMISSION : Cross-Sectional
View".Symptom
Diagnostic item
Oil pump
Torque converter
Low brake*
Front brake
High and low reverse clutch
Input clutch
Direct clutch
2346 brake
Reverse brake
gear
1st one-way clutch
2nd one-way clutch
control valve
Parking component
TM-270
TM-211TM-211TM-211TM-292TM-282TM-294TM-270TM-211TM-211TM-287TM-211TM-182TM-211
Function
trouble
Power trans-
mission cannot
be performed
Vehicle cannot run in all position. 1 1 2 1 1 1 1 1 1 2 1
Driving is not possible in “D” posi-
tion.
11211111 11121
Driving is not possible in “R” posi-
tion. 1 111121
Engine stall 1
Engine stalls when selector lever
shifted “N” → “D” or “R”. 1
Engine does not start in “N” or “P”
position. 1
Engine starts in position other
than “N” or “P”.
Poor operation Vehicle does not enter parking
condition.
1
Parking condition is not cancelled. 1
Vehicle runs with A/T in “P” posi-
tion. 2111111 21
Vehicle moves forward with the
“R” position. 211111 2
Vehicle runs with A/T in “N” posi-
tion. 2111111 2
Vehicle moves backward with the
“D” position. 12
Revision: 2010 May2011 QX56

A/T FLUIDTM-175
< PERIODIC MAINTENANCE > [7AT: RE7R01B]
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PERIODIC MAINTENANCE
A/T FLUID
InspectionINFOID:0000000006288673
FLUID LEAKAGE
 Check transaxle surrounding area (oil seal and plug etc.) for fluid leakage.
 If anything is found, repair or replace damaged parts and adjust A/
T fluid level. Refer to TM-95, "
Adjustment".
JSDIA1912ZZ
Revision: 2010 May2011 QX56

TM-176
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
A/T SHIFT SELECTOR
REMOVAL AND INSTALLATION
A/T SHIFT SELECTOR
Exploded ViewINFOID:0000000006226891
Removal and InstallationINFOID:0000000006226892
REMOVAL
1. Shift the selector lever to “N” position.
2. Remove knob cover (A) below selector lever downward.
3. Pull lock pin (1) out of selector lever knob (2).
4. Remove selector lever knob.
5. Remove center console assembly. Refer to
IP-25, "
Removal and
Installation".
CAUTION:
When disconnecting connector from shift position switch,
never twist or apply an excessi ve load to the connector.
6. Remove cluster lid C lower. Refer to IP-14, "
Removal and Instal-
lation".
7. Disconnect A/T shift selector connector and main harness from A/T shift selector assembly.
8. Shift the selector lever to “P” position.
9. Remove control cable from A/T shift selector assembly. Refer to TM-178, "
Removal and Installation".
10. Remove A/T shift selector assembly.
1. Lock pin 2. Selector lever knob 3. A/T shift selector assembly
4. Bracket 5. Adapter
Refer to GI-4, "
Components" for symbols in the figure.
JSDIA1554GB
JSDIA1676ZZ
Revision: 2010 May2011 QX56

A/T SHIFT SELECTORTM-177
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
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INSTALLATION
Note the following, and install in the reverse order of removal.
 When installing control cable (1) to A/T shift selector assembly (2), check that control cable is fully pressed in with the ribbed (A) sur-
face facing upward.
 Refer to the followings when installing the selector lever knob to
the A/T shift selector assembly.
1. Install the lock pin to the selector lever knob.
2. Insert the shift lever knob into the shift lever until it clicks. CAUTION:
 Install it straight, and n ever tap or apply any shock to
install it.
 Never press selector button.
Inspection and AdjustmentINFOID:0000000006226893
INSPECTION AFTER INSTALLATION
Check A/T position after adjusting A/T position. Refer to TM-101, "Inspection".
ADJUSTMENT AFTER INSTALLATION
Adjust A/T position. Refer to TM-101, "Adjustment".
JPDIA0609ZZ
Revision: 2010 May2011 QX56

TM-178
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
CONTROL CABLE
CONTROL CABLE
Exploded ViewINFOID:0000000006226894
Removal and InstallationINFOID:0000000006226895
REMOVAL
1. Remove center console assembly . Refer to
IP-25, "Removal and Installation".
2. Remove cluster lid C cover and instrument center finisher LH. Refer to IP-14, "
Removal and Installation".
3. Shift selector lever in “P” position.
4. Remove control cable from A/T shift selector assembly.
5. Remove control cable from manual lever and control cable mounting bracket.
1. Control cable 2. A/T shift selector assembly 3. Lock plate
4. Manual lever 5. Washer 6. Lock plate
7. Bracket 8. A/T assembly
A. Retainer
Refer to GI-4, "
Components" for symbols in the figure.
JSDIA1589GB
Revision: 2010 May2011 QX56

CONTROL CABLETM-179
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
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6. Remove retainer mounting bolts ( ) according to the following procedure.
a. Separate propeller shaft assembly (front). Refer to DLN-129,
"Removal and Installation". (For 4WD models)
b. Disconnect heated oxygen sensor 2 connectors (bank 1 and bank 2). Refer to EX-5, "
Exploded View".
c. Remove exhaust front tube (RH and LH). Refer to EX-5,
"Exploded View".
d. Remove heat plates above three way catalyst (RH and LH).
e. Remove control cable mounting bracket from A/T assembly.
f. Remove retainer mounting bolts from dash panel.
7. Remove control cable from the vehicle.
INSTALLATION
Note the following, and install in the reverse order of removal.
When installing control cable (1) to A/T shift selector assembly (2),
check that control cable is fully pressed in with the ribbed (A) surface
facing upward.
Inspection and AdjustmentINFOID:0000000006226896
INSPECTION AFTER INSTALLATION
Check A/T position after adjusting A/T position. Refer to TM-101, "Inspection".
ADJUSTMENT AFTER INSTALLATION
Adjust A/T position. Refer to TM-101, "Adjustment".
JSDIA1677ZZ
JPDIA0609ZZ
Revision: 2010 May2011 QX56

TM-180
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
SELECTOR LEVER POSITION INDICATOR
SELECTOR LEVER POSITION INDICATOR
Removal and InstallationINFOID:0000000006226897
REMOVAL
1. Remove console finisher assembly. Refer to
IP-25, "Removal and Installation".
2. Remove insert finisher (1).
3. Remove selector lever position indicator (2).
INSTALLATION
Install in the reverse order of removal.
: Screw
JSDIA1646ZZ
Revision: 2010 May2011 QX56

TOW MODE SWITCHTM-181
< REMOVAL AND INSTALLATION > [7AT: RE7R01B]
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TOW MODE SWITCH
Removal and InstallationINFOID:0000000006226898
NOTE:
Tow mode switch is integrated in to SNOW MODE/T OW MODE/VDC OFF switch assembly (2WD models) or
4WD switch assembly (4WD models).
REMOVAL
1. Remove console finisher assembly from center console assembly. Refer to IP-25, "Removal and Installa-
tion".
2. Disconnect SNOW MODE/TOW MODE /VDC OFF switch assembly (2WD models) or 4WD switch
assembly (4WD models) harness connector.
3. Press SNOW MODE/TOW MODE/VDC OFF switch a ssembly (2WD models) or 4WD switch assembly
(4WD models) fixing pawls, and remove SNOW MO DE/TOW MODE/VDC OFF switch assembly (2WD
models) or 4WD switch assembly (4WD models) from console finisher assembly.
INSTALLATION
Install in the reverse order of removal.
Revision: 2010 May2011 QX56

TM-182
< REMOVAL AND INSTALLATION >[7AT: RE7R01B]
CONTROL VALVE & TCM
CONTROL VALVE & TCM
Exploded ViewINFOID:0000000006226899
Removal and InstallationINFOID:0000000006226900
REMOVAL
1. Drain ATF through drain plug.
1. A/T 2. Snap ring 3. Control valve & TCM
4. Oil pan gasket 5. Oil pan 6. Clip
7. Oil pan mounting bolt 8. Overflow plug 9. Drain plug
10. Drain plug gasket 11. Magnet 12. Clip
13. Joint connector
Refer to
GI-4, "
Components" for symbols in the figure.
JSDIA1755GB
Revision: 2010 May2011 QX56