2011 INFINITI QX56 height

DLN-182
< UNIT DISASSEMBLY AND ASSEMBLY >[FRONT FINAL DRIVE: R180A]
DRIVE PINION
5. Turn the assembly several times to seat the bearings.
6. Measure the turning torque at the end of the J-34309-2 gauge
anvil using preload gauge [SST: ST3127S000 (J-25765-A)].
7. Place the J-34309-10 “R180A” pinion height adapter onto the gauge plate and tighten it by hand.
CAUTION:
Make sure all machined surfaces are clean.
8. Position the side bearing discs, J-25269-18, and arbor firmly into
the side bearing bores. Install the bearing caps and tighten bear-
ing cap mounting bolts to the specified torque. Refer to DLN-
176, "Exploded View".
9. Select the correct standard pinion height adjusting washer thick- ness. Select by using a standard gauge of 3 mm (0.12 in) and J-
34309-101 feeler gauge. Measure the distance between the J-
34309-11 pinion height adapter including the standard gauge
and the arbor.
SPD770
Turning torque specifica-
tion : 1.08 – 1.66 N·m (0.11 –
0.16 kg-m, 10 – 14 in-lb)
PDIA0566E
SPD208A
SPD211A
SPD204A
Revision: 2010 May2011 QX56

DRIVE PINIONDLN-183
< UNIT DISASSEMBLY AND ASSEMBLY > [FRONT FINAL DRIVE: R180A]
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10. Write down exact measurement (the value of feeler gauge).
11. Correct the pinion height washer size by referring to the “pinion head number”.
There are two numbers painted on the drive pinion. The first
one refers to the drive pinion and drive gear as a matched
set. This number should be the same as the number on the
drive gear. The second number is the “pinion head height
number”. It refers to the ideal pinion height from standard
for quietest operation. Use th e following chart to determine
the correct pinion height washer.
12. Select the correct pinion height adjusting washer. For selecting adjusting washer, refer to the latest parts information.
13. Remove the J-34309 differential shim selector tool from the final drive housing. Then disassemble to retrieve the pinion bearings.
COMPANION FLANGE RUNOUT
SPD775
Pinion head height number Add or remove from the standard pinion height ad-
justing washer thickness measurement
− 6
− 5
− 4
− 3
− 2
− 1
0
+1
+2
+3
+4
+5
+6 Add 0.06 mm (0.0024 in)
Add 0.05 mm (0.0020 in)
Add 0.04 mm (0.0016 in)
Add 0.03 mm (0.0012 in)
Add 0.02 mm (0.0008 in)
Add 0.01 mm (0.0004 in)
Use the selected washer thickness
Subtract 0.01 mm (0.0004 in)
Subtract 0.02 mm (0.0008 in)
Subtract 0.03 mm (0.0012 in)
Subtract 0.04 mm (0.0016 in)
Subtract 0.05 mm (0.0020 in)
Subtract 0.06 mm (0.0024 in)SPD542
SPD205A
Revision: 2010 May2011 QX56

DIFFERENTIAL ASSEMBLYDLN-203
< UNIT DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
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UNIT DISASSEMBLY AND ASSEMBLY
DIFFERENTIAL ASSEMBLY
Exploded ViewINFOID:0000000006222420
1. Rear cover 2. Bearing cap 3. Side gear thrust washer
4. Side gear 5. Pinion mate thrust washer 6. Pinion mate gear
7. Pinion mate shaft 8. Lock pin 9. Side bearing
10. Side bearing adjusting washer 11. Drive pinion 12. Pinion height adjusting washer
13. Pinion rear bearing 14. Collapsible spacer 15. Side flange
16. Circlip 17. Side oil seal 18. Gear carrier
19. Pinion front bearing 20. Front oil seal 21. Companion flange
22. Drive pinion lock nut 23. Drive gear 24. Differential case
25. Gasket 26. Drain plug 27. Filler plug
A. Oil seal lip B. Screw hole C. Co mply with the assembly proce-
dure when tightening. Refer to DLN-
206, "Assembly".
: Apply gear oil. : Apply anti-corrosion oil.
JPDID0397GB
Revision: 2010 May2011 QX56

DLN-214
< UNIT DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
DIFFERENTIAL ASSEMBLY
4. If tooth contact is improperly adjusted, follow the procedure
below to adjust the pinion height [dimension (X)].
 If the tooth contact is near the face (face contact), or near theheel (heel contact), thicken pinion height adjusting washers to
move drive pinion closer to drive gear.
For selecting adjusting washer, refer to the latest parts infor-
mation.
 If the tooth contact is near the flank (flank contact), or near the toe (toe contact), thin pinion height adjusting washers to move
drive pinion farther from drive gear.
For selecting adjusting washer, refer to the latest parts infor-
mation.
BACKLASH
Before inspection and adjustment, drain gear oil.
1. Remove rear cover. Refer to DLN-204, "
Disassembly".
2. Fit a dial indicator to the drive gear face to measure the back- lash.
 If the backlash is outside of the specified value, change thethickness of side bearing adjusting washer.
SDIA0517E
PDIA0440E
PDIA0441E
Backlash : Refer to DLN-222, "Back-
lash".
When the backlash is large: Make drive gear back side adjusting washer thicker,
and drive gear tooth side adjusting washer thinner by
the same amount. For selectin g adjusting washer, re-
fer to the latest parts information.
SPD513
Revision: 2010 May2011 QX56

DLN-216
< UNIT DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
DRIVE PINION
DRIVE PINION
Exploded ViewINFOID:0000000006222425
1. Rear cover 2. Bearing cap 3. Side gear thrust washer
4. Side gear 5. Pinion mate thrust washer 6. Pinion mate gear
7. Pinion mate shaft 8. Lock pin 9. Side bearing
10. Side bearing adjusting washer 11. Drive pinion 12. Pinion height adjusting washer
13. Pinion rear bearing 14. Collapsible spacer 15. Side flange
16. Circlip 17. Side oil seal 18. Gear carrier
19. Pinion front bearing 20. Front oil seal 21. Companion flange
22. Drive pinion lock nut 23. Drive gear 24. Differential case
25. Gasket 26. Drain plug 27. Filler plug
A. Oil seal lip B. Screw hole C. Comply with the assembly proce-
dure when tightening. Refer to DLN-
206, "Assembly".
: Apply gear oil. : Apply anti-corrosion oil.
: Apply Genuine Silicone RTV or equivalent. Refer to GI-22, "
Recommended Chemical Products and Sealants".
JPDID0397GB
Revision: 2010 May2011 QX56

DLN-218
< UNIT DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
DRIVE PINION
10. Remove pinion rear bearing inner race and pinion height adjust-
ing washer with the replacer (A) (commercial service tool).
11. Tap pinion front/rear bearing outer races uniformly using a brass rod or equivalent to remove them.
CAUTION:
Never damage gear carrier.
12. Perform inspection after disassembly. Refer to DLN-220,
"Inspection".
AssemblyINFOID:0000000006222427
1. Install front bearing outer race and rear bearing outer race using
drifts.
CAUTION:
 At first, using a hammer, tap bearing outer race until itbecomes flat to gear carrier.
 Never reuse pinion front and rear bearing outer race.
2. Select drive pinion height adjusting washer. For selecting adjust- ing washer, refer to the latest parts information.
PDIA0801J
SDIA0817E
A : Drift [SST: KV38103300 ( — )]
B : Drift [SST: ST30611000 (J-25742-1)]
C : Drift bar [SST: ST30621000 (J-25742-5)]
PDIA0944E
Revision: 2010 May2011 QX56

DRIVE PINIONDLN-219
< UNIT DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
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3. Install selected drive pinion height adjusting washer (2) to drive pinion. Press pinion rear bearing inner race (1) to it, using drift
(A) [SST: ST30022000 ( — )].
CAUTION:
 Be careful of the direction of pinion height adjusting
washer. (Assemble as shown in the figure.)
 Never reuse pinion rear bearing inner race.
4. Assemble collapsible spacer to drive pinion. CAUTION:
Never reuse collapsible spacer.
5. Apply gear oil to pinion rear bearing, and assemble drive pinion into gear carrier.
6. Apply gear oil to pinion front bearing, and assemble pinion front bearing inner race to drive pinion assembly.
CAUTION:
Never reuse pinion front bearing inner race.
7. Using suitable spacer (A), press the pinion front bearing inner race to drive pinion as far as drive pinion nut can be tightened.
8. Using the drift (A) [SST: ST15310000 (J-25640-B)], install front oil seal in evenly until it becom es flush with the gear carrier.
CAUTION:
 Never reuse oil seal.
 When installing, never incline oil seal.
 Apply multi-purpose grease onto oil seal lips, and gear oil
onto the circumference of oil seal.
9. Install companion flange (1). NOTE:
When reusing drive pinion, align the matching mark (B) of drive
pinion with the matching mark (A) of companion flange, and then
install companion flange.
PDIA0805J
PDIA0492E
PDIA0762J
PDIA0764J
JSDIA0038ZZ
Revision: 2010 May2011 QX56

EC-182
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0031, P0032, P0051, P00
52 A/F SENSOR 1 HEATER
2.DETECT MALFUNCTIONING PART
Check the following.
 20 A fuse (No. 43)
 Harness for open or short between A/F sensor 1 and fuse
 Loose or poor connection for each connector and harness
>> Repair or replace harness or connectors.
3.CHECK A/F SENSOR 1 HEATER OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK A/F SENSOR 1 HEATER
Refer to EC-182, "
Component Inspection (A/F Sensor 1 Heater)".
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.REPLACE A/F SENSOR 1
Replace malfunctioning A/F sensor 1. Refer to EM-40, "
Exploded View".
CAUTION:
 Discard any A/F sensor which has b een dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
 Before installing new A/F sensor, clean exhau st system threads using Oxygen Sensor Thread
Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).
>> INSPECTION END
6.CHECK INTERMITTENT INCIDENT
Perform GI-40, "
Intermittent Incident".
>> INSPECTION END
Component Inspection (A/F Sensor 1 Heater)INFOID:0000000006217777
1.CHECK AIR FUEL RATIO (A/F) SENSOR 1
1. Turn ignition switch OFF.
2. Disconnect air fuel ratio (A/F) sensor 1 harness connector.
3. Check resistance between A/F sensor 1 terminals as per the following.
DTC A/F sensor 1 ECM
Continuity
Bank Connector Terminal Connector Terminal
P0031, P0032 1 F67 2 F11048
Existed
P0051, P0052 2 F68 2 53
Terminal Resistance
2 and 5 2.0 - 3.2 Ω [at 25 °C (77 °F)]
Revision: 2010 May2011 QX56