check oil INFINITI QX56 2011 Factory Workshop Manual

REAR DIFFERENTIAL GEAR OILDLN-193
< PERIODIC MAINTENANCE > [REAR FINAL DRIVE: R230]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
PERIODIC MAINTENANCE
REAR DIFFERENTIAL GEAR OIL
InspectionINFOID:0000000006222411
OIL LEAKAGE
Check that differential gear oil is not leaking fr om the rear final drive assembly or around it.
OIL LEVEL
 Remove filler plug (1) and check oil level from filler plug mounting
hole as shown in the figure.
CAUTION:
Never start engine while checking oil level.
 Set a gasket on filler plug (1) and install it on final drive assembly. Refer to DLN-203, "
Exploded View".
CAUTION:
Never reuse gasket.
DrainingINFOID:0000000006222412
1. Stop the engine.
2. Remove drain plug (1) and drain gear oil.
3. Set a gasket on drain plug (1) and install it to final drive assem- bly and tighten to the specified torque. Refer to DLN-203,
"Exploded View".
CAUTION:
Never reuse gasket.
RefillingINFOID:0000000006222413
1. Remove filler plug (1). Fill with new gear oil until oil level reaches the specified level near filler plug mounting hole.
2. After refilling oil, check oil level. Set a gasket to filler plug (1), then install it to final drive assembly. Refer to DLN-203,
"Exploded View".
CAUTION:
Never reuse gasket.
JPDID0415ZZ
JPDID0392ZZ
Oil grade and viscosity : Refer to MA-10, "Fluids and
Lubricants".
Oil capacity : Refer to DLN-222, "
General
Specification".
JPDID0415ZZ
Revision: 2010 May2011 QX56

FRONT OIL SEALDLN-197
< REMOVAL AND INSTALLATION > [REAR FINAL DRIVE: R230]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
1. Apply multi-purpose grease to the lips of the new front oil seal.
Then drive the new front oil seal in evenly until it becomes flush
with the gear carrier using t he drift (A) [SST: ST15310000 (J-
25640-B)].
CAUTION:
 Never reuse front oil seal.
 Never incline the new front oil seal when installing.
2. Align the matching mark (B) of drive pinion with the matching mark (A) of companion flange (1), and then install the compan-
ion flange.
3. Apply anti-corrosion oil to the thread and seat of new drive pin- ion lock nut, and temporarily tighten drive pinion lock nut to drive
pinion, using a flange wrench (commercial service tool).
CAUTION:
Never reuse drive pinion lock nut.
4. Tighten drive pinion lock nut within the limits of specified torque so as to keep the pinion bearing preload within a standard val-
ues, using the preload gauge (A) [SST: ST3127S000 (J-25765-
A)].
CAUTION:
 Adjust to the lower limit of the drive pinion lock nut tight-
ening torque first.
 If the preload torque exceeds the specified value, replace
collapsible spacer and tighte n it again to adjust. Never
loosen drive pinion lock nut to adjust the preload torque.
5. Fit a test indicator to the inner side of companion flange (socket diameter).
6. Rotate companion flange to check for runout.
 If the runout value is outside the runout limit, follow the proce-dure below to adjust.
- Check for runout while changing the phase between compan-
ion flange and drive pinion by 90 ° step, and search for the
position where the runout is the minimum.
PDIA0752J
JSDIA0038ZZ
Total preload torque : A value that add 0.1 – 0.4
N·m (0.01 – 0.04 kg-m, 0.9 –
3.5 in-lb) to the measured
value before removing.
PDIA1007E
Companion flange runout : Refer to DLN-222, "Com-
panion Flange Runout".
JPDID0399ZZ
Revision: 2010 May2011 QX56

DLN-198
< REMOVAL AND INSTALLATION >[REAR FINAL DRIVE: R230]
FRONT OIL SEAL
- If the runout value is still outside of the limit
after the phase has been changed, possible cause will be an
assembly malfunction of drive pinion and pinion bearing and malfunction of pinion bearing. Check for
these items and repair if necessary.
- If the runout value is still outside of the limit after the check and repair, replace companion flange.
7. Make a stamping for identification of front oil seal replacement frequency. Refer to “Identification stamp of
replacement frequency of front oil seal”.
CAUTION:
Make a stamping after replacing front oil seal.
8. Install rear propeller shaft. Refer to DLN-144, "
Removal and Installation".
9. Install side flange with the following procedure.
a. Attach the protector [SST: KV38108000 ( — )] to side oil seal.
b. After the side flange is inserted and the serrated part of side gear has engaged the serrated part of flange, remove the pro-
tector.
c. Put a suitable drift on the center of side flange, then drive it until sound changes.
NOTE:
When installation is completed, driving sound of the side flange
turns into a sound that seems to affect the whole final drive.
d. Confirm that the dimension of the side flanges (1) installation measurement (A) in the figure comes into the following.
10. Install drive shaft. Refer to RAX-11, "
Removal and Installation".
11. Refill gear oil to the final drive and check oil level. Refer to DLN-
193, "Refilling".
12. Check the final drive for oil leakage. Refer to DLN-193, "
Inspec-
tion".
SDIA0822E
A : 342.2 mm (13.47 in)
JSDIA0185ZZ
Revision: 2010 May2011 QX56

DLN-200
< REMOVAL AND INSTALLATION >[REAR FINAL DRIVE: R230]
SIDE OIL SEAL
1. Install side oil seal until it becomes flush with the case end,
using the drift (A) [SST: ST35271000 (J-26091)].
CAUTION:
 Never reuse side oil seal.
 Never incline the new side oil seal when installing.
 Apply multi-purpose grease to the lips of the new side oil
seal.
2. Install the side flange with the following procedure.
a. Install the protector [SST: KV38108000 ( — )] to the side oil seal as shown.
b. Insert the side flange until the se rrated part of the side flange
has engaged the serrated part of the side gear and remove the
Tool.
c. Drive in the side flange using suitable tool. NOTE:
Installation is completed when the driving sound of the side
flange turns into a sound which seems to affect the whole rear
final drive assembly.
d. Confirm that the dimension of the side flanges (1) installation measurement (A) in the figure comes into the following.
3. Install drive shaft. Refer to RAX-11, "
Removal and Installation".
4. Refill gear oil to final drove and check oil level. Refer to DLN-
193, "Refilling".
5. When oil leaks while removing, check oil level after the installa- tion. Refer to DLN-193, "
Inspection".
PDIA1008E
SDIA0822E
A : 342.2 mm (13.47 in)
JSDIA0185ZZ
Revision: 2010 May2011 QX56

DLN-202
< UNIT REMOVAL AND INSTALLATION >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
5. Set a suitable jack to rear final drive assembly.
CAUTION:
Never place a jack under the rear cover (aluminum case).
6. Remove the mounting bolts and nuts connecting to the suspen- sion member with power tool. And then, remove rear final drive
assembly.
CAUTION:
Secure rear final drive assembly to a suitable jack while
removing it.
INSTALLATION
Note the following, and installation is in the reverse order of removal.
CAUTION:
Check that there are no pinched or restricted areas on the breather hose caused by bending or wind-
ing when installing it.
 In (A) position, install the breather hose (1) until dimension (D) shown as follows.
CAUTION:
 Never reuse hose clamp.
 Install the hose clamp, wit h the tab facing downward.
 In (B) position, install the breather hose (2) until hose reaches the
plane tube surface connector.
CAUTION:
 Never reuse hose clamp.
 Install the hose clamp, with the tab facing righ tward and upward direction of the vehicle at 45°.
 In (C) position, install the breather hose (2) until dimension (E) shown as follows.
 Install breather hose (1) and (2), breather tube (3) and metal con- nector (4) as shown in the figure.
- Fix breather hose (2) with clip in (A) position CAUTION:
Never reuse clip.
- Install metal connector (4) to rear cover with a part to insert breather hose with facing vehicle left.
CAUTION:
Never reuse metal connector.
- Fix a point with paint mark (B) of breather tube (3) in (C) position.
- Fix breather tube (3) in (D) position.
 When oil leaks while removing final drive assembly, check oil level after the installation. Refer to DLN-193, "
Inspection".
JSDIA0132ZZ
: Vehicle front
D : 20 mm (0.79 in)
E : 20 mm (0.79 in)
: Vehicle front
JPDID0395ZZ
JPDID0396ZZ
Revision: 2010 May2011 QX56

DLN-210
< UNIT DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
DIFFERENTIAL ASSEMBLY
16. Using the drift [SST: ST35271000 (J-26091)], drive side oil seals
until it becomes flush with the case end.
CAUTION:
 Never reuse oil seal.
 When installing, n ever incline oil seal.
 Apply multi-purpose grease onto oil seal lips, and gear oil
onto the circumference of oil seal.
17. Check and adjust drive gear runout, tooth contact, drive gear to drive pinion backlash, and total preload torque. Refer to DLN-
210, "Adjustment".
Recheck above items. Readjust the above description, if neces-
sary.
18. Apply sealant to mating surface of rear cover.  Use Genuine Silicone RTV or equivalent. Refer to GI-22,
"Recommended Chemical Products and Sealants".
CAUTION:
Remove old sealant adhering to mounting surfaces. Also
remove any moisture, oil, or foreign material adhering to
application and mounting surfaces.
19. Install rear cover on gear carrier and tighten mounting bolts.
20. Install side flange with the following procedure.
a. Attach the protector [SST: KV38108000 ( — )] to side oil seal.
b. After the side flange is inserted and the serrated part of side gear has engaged the serrated part of flange, remove the pro-
tector.
c. Insert the side flange until the se rrated part of the side flange
has engaged the serrated part of the side gear and remove the
protector.
NOTE:
When installation is completed, driving sound of the side flange
turns into a sound that seems to affect the whole final drive.
d. Confirm that the dimension of the side flanges (1) installation measurement (A) in the figure comes into the following.
AdjustmentINFOID:0000000006222423
TOTAL PRELOAD TORQUE
Before inspection and adjustment, drain gear oil.
1. Secure final drive assembly onto an attachment [SST: KV38100800 ( — )].
2. Remove side flanges.
3. Rotate drive pinion back and forth 2 to 3 times to check for unusual noise and rotation malfunction.
SPD560
PDIA0961E
SDIA0822E
A : 342.2 mm (13.47 in)
JSDIA0185ZZ
Revision: 2010 May2011 QX56

DIFFERENTIAL ASSEMBLYDLN-211
< UNIT DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
C
EF
G H
I
J
K L
M A
B
DLN
N
O P
4. Rotate drive pinion at least 20 times to check for smooth opera- tion of the bearing.
5. Measure total preload with the preload gauge (A) [SST: ST3127S000 (J-25765-A)].
NOTE:
Total preload torque = Pinion bearing preload torque + Side
bearing preload torque
 If measured value is out of the specification, disassemble it to
check and adjust each part. Adjust the pinion bearing preload and side bearing preload.
Adjust the pinion bearing preload firs t, then adjust the side bearing preload.
SIDE BEARING PRELOAD
Before inspection and adjustment, drain gear oil.
1. Remove rear cover. Refer to DLN-204, "
Disassembly".
2. Make sure all parts are clean. Also, make sure the bearings are well lubricated with gear oil.
3. Place the differential case, with side bearings and bearing races installed, into gear carrier.
4. Insert left and right original side bearing adjusting washers in place between side bearings and gear carrier.Total preload torque : Refer to
DLN-222, "
Pre-
load Torque".
JSDIA0042ZZ
When the preload torque is large
On pinion bearings: Replace the collapsible spacer.
On side bearings: Use thinner side bearing adjusting washers by the same amount to
each side. For selecting adjusting wash er, refer to the latest parts in-
formation.
When the preload is small On pinion bearings: Tighten the drive pinion lock nut.
On side bearings: Use thicker side bearing adjusting washers by the same amount to
each side. For selecting adjusting wash er, refer to the latest parts in-
formation.
SPD527
SPD558
Revision: 2010 May2011 QX56

DLN-212
< UNIT DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
DIFFERENTIAL ASSEMBLY
5. Install bearing caps in their correct locations and tighten bearing
cap mounting bolts.
6. Turn the carrier several times to seat the bearings.
7. Measure the turning torque of the carrier at the drive gear mounting bolts with a spring gauge [SST: — (J-8129)].
8. If the turning torque is outside the specification, use a thicker/ thinner side bearing adjusting washer to adjust. For selecting
adjusting washer, refer to the latest parts information.
CAUTION:
Select a side bearing adjust ing washer for right and left
individually.
9. Record the total amount of washer thickness required for the correct carrier side bearing preload.
DRIVE GEAR RUNOUT
1. Remove rear cover. Refer to DLN-204, "Disassembly".
2. Fit a dial indicator to the drive gear back face.
3. Rotate the drive gear to measure runout.
 If the runout is outside of the repair limit, check drive gearassembly condition; foreign material may be caught between
drive gear and differential case, or differential case or drive
gear may be deformed, etc.
CAUTION:
Replace drive gear and dri ve pinion gear as a set.
TOOTH CONTACT
Before inspection and adjustment, drain gear oil.
1. Remove rear cover. Refer to DLN-204, "
Disassembly".
SDIA1795E
Specification : 34.2 – 39.2N (3.5 – 4.0 kg,
7.7 – 8.8 lb) of pulling force
at the drive gear bolt
SPD194A
If the turning torque is less
than the specified range:Use a thicker thrust wash-
er.
If the turning torque is
greater than the specifica-
tion: Use a thinner thrust wash-
er.
SPD772
Drive gear runout : Refer to
DLN-222, "Drive
Gear Runout".
SPD886
Revision: 2010 May2011 QX56

DLN-220
< UNIT DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
DRIVE PINION
10. Apply anti-corrosion oil to the thread and seat of drive pinion
lock nut, and temporarily tighten drive pinion lock nut to drive
pinion, using flange wrench (c ommercial service tool).
CAUTION:
Never reuse drive pinion lock nut.
11. Adjust to the drive pinion lock nut tightening torque and pinion bearing preload torque, using preload gauge [SST: ST3127S000
(J-25765-A)].
CAUTION:
 Adjust to the lower limit of the drive pinion lock nut tight-
ening torque first.
 If the preload torque exceeds the specified value, replace
collapsible spacer and tighte n it again to adjust. Never
loosen drive pinion lock nut to adjust the preload torque.
 After adjustment, rotate dri ve pinion back and forth 2 to 3
times to check for unusual no ise, rotation malfunction,
and other malfunctions.
12. Install differential case assembly. Refer to DLN-206, "
Assem-
bly".
CAUTION:
Never install rear cover at this timing.
13. Check and adjust drive gear runout, tooth contact, drive gear to drive pinion backlash, and companion flange runout. Refer to DLN-210, "
Adjustment" and DLN-220, "Adjustment".
Recheck above items. Readjust the above description, if necessary.
14. Check total preload torque. Refer to DLN-210, "
Adjustment".
15. Install rear cover. Refer to DLN-206, "
Assembly".
AdjustmentINFOID:0000000006222428
COMPANION FLANGE RUNOUT
1. Fit a test indicator to the inner side of the companion flange
(socket diameter).
2. Rotate companion flange to check for runout.
3. If the runout value is outside t he runout limit, follow the proce-
dure below to adjust.
a. Check for runout while changing the phase between companion flange and drive pinion by 90 ° step, and search for the position
where the runout is the minimum.
b. If the runout value is still outside of the limit after the phase has been changed, possible cause will be an
assembly malfunction of drive pinion and pinion bearing and malfunction of pinion bearing. Check for
these items and repair if necessary.
c. If the runout value is still outside of the limit after the check and repair, replace companion flange.
InspectionINFOID:0000000006222429
INSPECTION AFTER DISASSEMBLY
Drive Gear and Drive Pinion
 Clean up the disassembled parts.
 If the gear teeth never mesh or line-up correctly, det ermine the cause and adjust or replace as necessary.
Pinion bearing preload : Refer to
DLN-222, "
Pre-
load Torque".
JSDIA0047ZZ
Inner side of companion
flange runout: Refer to
DLN-222, "Com-
panion Flange Runout".
JPDID0399ZZ
Revision: 2010 May2011 QX56

EC-4
Component Inspection (Engine Coolant Tempera-
ture Sensor) ...........................................................
216
P0117, P0118 ECT SENSOR ..........................217
DTC Logic ............................................................ ..217
Diagnosis Procedure .............................................217
Component Inspection (Engine Coolant Tempera-
ture Sensor) ...........................................................
218
P0122, P0123 TP SENSOR .............................219
DTC Logic ............................................................ ..219
Diagnosis Procedure .............................................219
Component Inspection (Throttle Position Sensor) ..220
P0125 ECT SENSOR .......................................222
DTC Logic ............................................................ ..222
Diagnosis Procedure .............................................222
Component Inspection (Engine Coolant Tempera-
ture Sensor) ...........................................................
223
P0127 IAT SENSOR ........................................224
DTC Logic ............................................................ ..224
Diagnosis Procedure .............................................224
Component Inspection (Intake Air Temperature
Sensor) ..................................................................
225
P0128 THERMOSTAT FUNCTION .................226
DTC Logic ............................................................ ..226
Diagnosis Procedure .............................................227
Component Inspection (Engine Coolant Tempera-
ture Sensor) ...........................................................
227
P0130, P0150 A/F SENSOR 1 .........................228
DTC Logic ............................................................ ..228
Component Function Check ..................................229
Diagnosis Procedure .............................................230
P0131, P0151 A/F SENSOR 1 .........................232
DTC Logic ............................................................ ..232
Diagnosis Procedure .............................................233
P0132, P0152 A/F SENSOR 1 .........................235
DTC Logic ............................................................ ..235
Diagnosis Procedure .............................................236
P0133, P0153 A/F SENSOR 1 .........................238
DTC Logic ............................................................ ..238
Diagnosis Procedure .............................................239
P0137, P0157 HO2S2 ......................................243
DTC Logic ............................................................ ..243
Component Function Check ..................................244
Diagnosis Procedure .............................................245
Component Inspection (HO2 sensor 2) .................246
P0138, P0158 HO2S2 ......................................249
DTC Logic ............................................................ ..249
Component Function Check ..................................251
Diagnosis Procedure .............................................251
Component Inspection (HO2 sensor 2) .................254
P0139, P0159 HO2S2 .......................................257
DTC Logic ............................................................ .257
Component Function Check .................................258
Diagnosis Procedure .............................................259
Component Inspection (HO2 sensor 2) ................260
P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION ........................................................
263
DTC Logic ............................................................ .263
Diagnosis Procedure .............................................264
P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION ........................................................
267
DTC Logic ............................................................ .267
Diagnosis Procedure .............................................268
P0181 FTT SENSOR ........................................271
DTC Logic ............................................................ .271
Diagnosis Procedure .............................................271
Component Inspection (Fuel Tank Temperature
Sensor) .................................................................
273
P0182, P0183 FTT SENSOR ............................274
DTC Logic ............................................................ .274
Diagnosis Procedure .............................................274
Component Inspection (Fuel Tank Temperature
Sensor) .................................................................
275
P0190, P0192, P0193 FRP SENSOR ...............276
DTC Logic ............................................................ .276
Diagnosis Procedure .............................................276
Component Inspection (Fuel Rail Pressure Sen-
sor) ........................................................................
278
P0191 FRP SENSOR .......................................279
DTC Logic ............................................................ .279
Diagnosis Procedure .............................................279
Component Inspection (Fuel Rail Pressure Sen-
sor) ........................................................................
281
P0196 EOT SENSOR .......................................283
DTC Logic ............................................................ .283
Diagnosis Procedure .............................................284
Component Inspection (Engine Oil Temperature
Sensor) .................................................................
284
P0197, P0198 EOT SENSOR ...........................285
DTC Logic ............................................................ .285
Diagnosis Procedure .............................................285
Component Inspection (Engine Oil Temperature
Sensor) .................................................................
286
P0201, P0202, P0203, P0204, P0205, P0206,
P0207, P0208 INJECTOR ................................
287
DTC Logic ............................................................ .287
Diagnosis Procedure .............................................287
P0222, P0223 TP SENSOR ..............................288
DTC Logic ............................................................ .288
Diagnosis Procedure .............................................288
Component Inspection (Throttle Position Sensor) .289
Revision: 2010 May2011 QX56