INFINITI QX56 2009 Factory Service Manual

REAR FINAL DRIVEDLN-265
< DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
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4. Assemble the collapsible spacer to the drive pinion. CAUTION:
Do not reuse collapsible spacer.
5. Apply differential gear oil to the drive pinion rear bearing, and install the drive pinion assembly to the gear carrier.
6. Apply differential gear oil to the drive pinion front bearing, and install the drive pinion front bearing inner race to the drive pinion
assembly.
CAUTION:
Do not reuse drive pinion front bearing inner race.
7. Press the drive pinion front bearing inner race to the drive pinion as far as drive pinion lock nut can be tightened using suitable
spacer.
8. 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 Tool.
CAUTION:
 Do not reuse front oil seal.
 Do not incline the new fron t oil seal when installing.
 Apply multi-purpose grease to th e lips of the new front oil
seal.
9. Install the companion flange to the drive pinion while aligning the matching marks.
PDIA0492E
SPD896
Tool number : ST15310000 ( — )
PDIA0563E
Revision: December 20092009 QX56

DLN-266
< DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
10. Apply anti-corrosive oil to the threads of the drive pinion and the
seating surface of the new drive pinion lock nut. Then adjust the
drive pinion lock nut tightening torque using suitable tool (A),
and check the drive pinion bearing preload torque using Tool
(B).
CAUTION:
 Do not reuse drive pinion lock nut.
 Apply anti-corrosive oil to th e threads of the drive pinion
and the seating surface of the new drive pinion lock nut.
 Adjust the drive pinion lock nut tightening torque to the lower limit first. Do not exceed the drive pinion lock nut
specified torque.
 If the drive pinion bearing preload torque exceeds the specified value, replace collap sible spacer and tighten it
again to adjust. Do not lo osen drive pinion lock nut to
adjust the drive pinion bearing 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.
11. Check companion flange runout.
12. Install the differential case assembly.
Differential Assembly
1. Install side gear thrust washers with the same thickness as the ones installed prior to disassembly, or reinstall the old ones on
the side gears.
2. Install the side gears and side gear thrust washers into the dif- ferential case.
CAUTION:
Make sure that the circular clip is installed to side gears.
3. Install the pinion mate thrust washers to the two pinion mate gears. Then install the pinion mate gears with the pinion mate
thrust washers by aligning them in diagonally opposite positions
and rotating them into the differential case.Tool number B: ST3127S000 (J-25765-A)
Drive pinion bearing preload torque
: Refer to DLN-270, "Inspection and Adjustment"
WDIA0379E
SDIA0193J
SDIA2025E
Revision: December 20092009 QX56

REAR FINAL DRIVEDLN-267
< DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
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4. Align the lock pin hole on the differential case with the lock pin hole on the pinion mate shaft, and install the pinion mate shaft.
5. Measure the side gear end play. If necessary, select the appro- priate side gear thrust washers. Refer to DLN-270, "Inspection
and Adjustment".
6. Drive a new lock pin into the pinion mate shaft until it is flush with the differential case using suitable tool.
CAUTION:
Do not reuse lock pin.
7. Align the matching mark of the differential case with the mark of the drive gear, then place the drive gear onto the differential
case.
8. Apply thread locking sealant into the threaded holes of the drive gear and install the bolts.
 Use Genuine Medium Strength Thread Locking Sealant orequivalent. Refer to GI-15, "Recommended Chemical Prod-
ucts and Sealants".
CAUTION:
Make sure the drive gear b ack and threaded holes are
clean.
9. Tighten the drive gear bolts to the specified torque. After tighten- ing the drive gear bolts to the specified torque, tighten an addi-
tional 34 ° using Tool (A).
CAUTION:
 Always use Tool. Avoid tighte ning based on visual check
alone.
 Tighten drive gear bolts in a crisscross pattern.
SDIA0195J
WDIA0131E
SDIA2593E
SDIA2594E
Tool number : KV10112100-A (BT-8653-A)
AWBIA0722ZZ
Revision: December 20092009 QX56

DLN-268
< DISASSEMBLY AND ASSEMBLY >[REAR FINAL DRIVE: R230]
REAR FINAL DRIVE
10. Press the side bearing inner races into the differential case
using Tools.
CAUTION:
Do not reuse side bearing inner race.
11. Install the differential case assembly with the side bearing outer races into the gear carrier.
12. Measure the side bearing preload torque. If necessary, select the appropriate side bearing adjusting washers. Refer to DLN-
270, "Inspection and Adjustment".
13. Insert the selected left and right side bearing adjusting washers in place between the side bearings and gear carrier.
14. Install the side bearing caps with the matching marks aligned and tighten the side bearing cap bolts to the specified torque.
15. Check and adjust the drive gear runout, tooth contact, drive gear to drive pinion backlash, and total pre-
load torque.
Recheck the above items.
16. Install the side flanges. Tool number A: KV38100200 (J-26233)
B: ST33081000 ( — )
SPD353
SPD919
SPD924
SPD889
Revision: December 20092009 QX56

REAR FINAL DRIVEDLN-269
< DISASSEMBLY AND ASSEMBLY > [REAR FINAL DRIVE: R230]
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17. Apply a 3.2mm (0.126 in) bead of sealant to the mating surface of the carrier cover.
 Use Genuine Silicone RTV or equivalent. Refer to GI-15,
"Recommended Chemical Products and Sealants".
CAUTION:
Remove any old sealant adheri ng to the mating surfaces.
Also remove any moisture, oil, or foreign material adhering
to the application and mating surfaces.
18. Install the carrier cover to the gear carrier. Tighten the bolts to the specified torque. Refer to DLN-249, "Removal and Installa-
tion".
19. Install the side flange. Refer to DLN-247, "Removal and Installa-
tion".
Side Flange
1. Apply multi-purpose grease to the lips of the new side oil seal.
Then drive the new side oil seal in evenly until it becomes flush
with the gear carrier using Tool.
CAUTION:
 Do not reuse side oil seal.
 Do not incline the new side oil seal when installing.
 Apply multi-purpose grease to th e lips of the new side oil
seal.
2. Install the side flange using Tool.
a. Install the Tool to the side oil seal as shown.
b. Insert the side flange until the serrated 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.
WDIA0282E
Tool number : KV38100200 (J-26233)
SPD560
Tool number : KV38107900 (J-39352)
SDIA0822E
Revision: December 20092009 QX56

DLN-270
< SERVICE DATA AND SPECIFICATIONS (SDS) [REAR FINAL DRIVE: R230]
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
General SpecificationINFOID:0000000004193561
Inspection and AdjustmentINFOID:0000000004193562
DRIVE GEAR RUNOUT
Unit: mm (in)
SIDE GEAR CLEARANCE
Unit: mm (in)
PRELOAD TORQUE
Unit: N·m (kg-m, in-lb)
BACKLASH
Unit: mm (in)
COMPANION FLANGE RUNOUT
Unit: mm (in)
SELECTIVE PARTS
Side Gear Thrust Washer
Applied model VK56DE
A/T
Final drive model R230
Gear ratio 3.357
Number of teeth (Drive gear/Drive pinion) 47/14
Oil capacity (Approx.) 1.75 (3 3/4 US pt, 3 1/8 Imp pt)
Number of pinion gears 2
Drive pinion adjustment spacer type Collapsible
Item Runout limit
Drive gear back face 0.05 (0.0020) or less
Item Specification
Side gear back clearance
(Clearance limit between side gear and differential case for adjusting
side gear backlash) 0.20 (0.0079) or less
(Each gear should rotate smoothly without excessive resis- tance during differential motion.)
Item Specification
Drive pinion bearing preload torque 1.77 − 2.64 N·m (0.18 − 0.26 kg −m, 16 − 23 in-lb)
Side bearing preload torque (reference value determined by drive
gear bolt pulling force) 0.20
− 0.52 N·m (0.02 − 0.05 kg −m, 2 − 4 in-lb)
Drive gear bolt pulling force (by spring gauge) 34.2 − 39.2 N (3.5 − 4.0 kg, 7.7 − 8.8 lb)
Total preload torque
(Total preload torque = drive pinion bearing preload torque + Side
bearing preload torque) 2.05
− 4.11 N·m (0.21 − 0.42 kg −m, 19 − 36 in-lb)
Item Specification
Drive gear to drive pinion gear 0.13 − 0.18 (0.0051 − 0.0070)
Item Runout limit
Outer side of the companion flange 0.08 (0.0031) or less
Revision: December 20092009 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)
DLN-271
< SERVICE DATA AND SPECIFICATIONS (SDS) [REAR FINAL DRIVE: R230]
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Unit: mm (in)
*: Always check with the Parts Department for the latest parts information.
Drive Pinion Height Adjusting Washer
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information.
Side Bearing Adjusting Washer
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information. Thickness Part number*
1.75 (0.0688)
1.80 (0.0708)
1.85 (0.0728) 38424 7S000
38424 7S001
38424 7S002
Thickness Part number* Thickness Part number*
2.59 (0.1020)
2.61 (0.1028)
2.63 (0.1035)
2.65 (0.1043)
2.67 (0.1051)
2.69 (0.1059)
2.71 (0.1067)
2.73 (0.1075)
2.75 (0.1083)
2.77 (0.1091) 38154 40P00
38154 40P01
38154 40P02
38154 40P03
38154 40P04
38154 40P05
38154 40P06
38154 40P07
38154 40P08
38154 40P092.79 (0.1098)
2.81 (0.1106) 2.83 (0.1114)
2.85 (0.1122)
2.87 (0.1130)
2.89 (0.1138)
2.91 (0.1146)
2.93 (0.1154)
2.95 (0.1161)
2.97 (0.1169) 38154 40P10
38154 40P11
38154 40P12
38154 40P13
38154 40P14
38154 40P15
38154 40P16
38154 40P17
38154 40P18
38154 40P19
Thickness Part number* Thickness Part number*
2.00 (0.0787)
2.05 (0.0807)
2.10 (0.0827)
2.15 (0.0846)
2.20 (0.0866)
2.25 (0.0886)
2.30 (0.0906) 38453 40P00
38453 40P01
38453 40P02
38453 40P03
38453 40P04
38453 40P05
38453 40P06
2.35 (0.0925)
2.40 (0.0945)
2.45 (0.0965)
2.50 (0.0984)
2.55 (0.1004)
2.60 (0.1024)
38453 40P07
38453 40P08
38453 40P09
38453 40P10
38453 40P11
38453 40P12
Revision: December 20092009 QX56

EC-1
ENGINE
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CONTENTS
ENGINE CONTROL SYSTEM
VK56DE
BASIC INSPECTION ....... .............................
8
DIAGNOSIS AND REPAIR WORKFLOW ..... .....8
Trouble Diagnosis Introduction ........................... ......8
INSPECTION AND ADJUSTMENT ....................13
Basic Inspection .................................................. ....13
Idle Speed and Ignition Timing Check ....................17
Procedure After Replacing ECM .............................17
VIN Registration ......................................................17
Accelerator Pedal Released Position Learning .......18
Throttle Valve Closed Position Learning .................18
Idle Air Volume Learning .........................................18
FUNCTION DIAGNOSIS ..............................21
ENGINE CONTROL SYSTEM ........................ ....21
System Diagram .................................................. ....21
Engine Control Component Parts Location .............22
MULTIPORT FUEL INJECTION SYSTEM .........28
System Description ............................................. ....28
ELECTRIC IGNITION SYSTEM ..................... ....31
System Description ............................................. ....31
AIR CONDITIONING CUT CONTROL ...............32
Input/Output Signal Chart .................................... ....32
System Description .................................................32
AUTOMATIC SPEED CONTROL DEVICE
(ASCD) ...............................................................
33
System Description ............................................. ....33
Component Description ...........................................34
CAN COMMUNICATION ....................................35
System Description ............................................. ....35
COOLING FAN CONTROL ................................36
Description .......................................................... ....36
EVAPORATIVE EMISSION SYSTEM ...............37
Description ........................................................... ....37
INTAKE VALVE TIMING CONTROL ................40
Description ...............................................................40
ON BOARD DIAGNOSTIC (OBD) SYSTEM ....41
Introduction ..............................................................41
Two Trip Detection Logic .........................................41
Emission-related Diagnostic Information .................42
Malfunction Indicator Lamp (MIL) ............................55
OBD System Operation Chart .................................58
CONSULT-III Function (ENGINE) ...........................63
Generic Scan Tool (GST) Function .........................72
COMPONENT DIAGNOSIS .........................74
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE ...............................................................
74
Description ........................................................... ....74
Testing Condition .....................................................74
Inspection Procedure ...............................................74
Diagnosis Procedure ...............................................75
POWER SUPPLY AND GROUND CIRCUIT ....82
Diagnosis Procedure ...............................................82
Ground Inspection ...................................................85
U1000, U1001 CAN COMM CIRCUIT ...............86
Description ...............................................................86
On Board Diagnosis Logic .......................................86
DTC Confirmation Procedure ..................................86
Diagnosis Procedure ...............................................86
P0011, P0021 IVT CONTROL ...........................87
On Board Diagnosis Logic .......................................87
DTC Confirmation Procedure ..................................87
Diagnosis Procedure ...............................................88
Component Inspection .............................................92
P0031, P0032, P0051, P0052 A/F SENSOR 1
HEATER ............................................................
94
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EC-2
Description ..............................................................94
On Board Diagnosis Logic ......................................94
DTC Confirmation Procedure .................................94
Diagnosis Procedure ..............................................94
Component Inspection ............................................96
P0037, P0038, P0057, P0058 HO2S2 HEAT-
ER ......................................................................
97
Description ........................................................... ...97
On Board Diagnosis Logic ......................................97
DTC Confirmation Procedure .................................97
Diagnosis Procedure ..............................................98
Component Inspection ............................................99
P0075, P0081 IVT CONTROL SOLENOID
VALVE .............................................................
100
Component Description ....................................... ..100
On Board Diagnosis Logic .....................................100
DTC Confirmation Procedure ................................100
Diagnosis Procedure .............................................100
Component Inspection ...........................................101
P0101 MAF SENSOR ......................................103
Component Description ....................................... ..103
On Board Diagnosis Logic .....................................103
DTC Confirmation Procedure ................................103
Overall Function Check .........................................104
Diagnosis Procedure .............................................105
Component Inspection ...........................................107
P0102, P0103 MAF SENSOR ..........................109
Component Description ....................................... ..109
On Board Diagnosis Logic .....................................109
DTC Confirmation Procedure ................................109
Diagnosis Procedure .............................................110
Component Inspection ...........................................111
P0112, P0113 IAT SENSOR ............................114
Component Description ....................................... ..114
On Board Diagnosis Logic .....................................114
DTC Confirmation Procedure ................................114
Diagnosis Procedure .............................................114
Component Inspection ...........................................116
P0116 ECT SENSOR .......................................117
Component Description ....................................... ..117
On Board Diagnosis Logic .....................................117
DTC Confirmation Procedure ................................117
Diagnosis Procedure .............................................118
Component Inspection ...........................................118
P0117, P0118 ECT SENSOR ..........................120
Component Description ....................................... ..120
On Board Diagnosis Logic .....................................120
DTC Confirmation Procedure ................................121
Diagnosis Procedure .............................................121
Component Inspection ...........................................122
P0122, P0123 TP SENSOR .............................124
Component Description ....................................... ..124
On Board Diagnosis Logic .....................................124
DTC Confirmation Procedure ............................... .124
Diagnosis Procedure .............................................124
Component Inspection ..........................................127
P0125 ECT SENSOR .......................................128
Component Description ....................................... .128
On Board Diagnosis Logic ....................................128
DTC Confirmation Procedure ................................128
Diagnosis Procedure .............................................129
Component Inspection ..........................................129
P0127 IAT SENSOR .........................................131
Component Description ....................................... .131
On Board Diagnosis Logic ....................................131
DTC Confirmation Procedure ................................131
Diagnosis Procedure .............................................132
Component Inspection ..........................................132
P0128 THERMOSTAT FUNCTION ..................134
On Board Diagnosis Logic ................................... .134
DTC Confirmation Procedure ................................134
Diagnosis Procedure .............................................134
Component Inspection ..........................................134
P0130, P0150 A/F SENSOR 1 .........................136
Component Description ....................................... .136
On Board Diagnosis Logic ....................................136
DTC Confirmation Procedure ................................136
Overall Function Check .........................................137
Diagnosis Procedure .............................................137
P0131, P0151 A/F SENSOR 1 .........................140
Component Description ....................................... .140
On Board Diagnosis Logic ....................................140
DTC Confirmation Procedure ................................140
Diagnosis Procedure .............................................141
P0132, P0152 A/F SENSOR 1 .........................143
Component Description ....................................... .143
On Board Diagnosis Logic ....................................143
DTC Confirmation Procedure ................................143
Diagnosis Procedure .............................................144
P0133, P0153 A/F SENSOR 1 .........................146
Component Description ....................................... .146
On Board Diagnosis Logic ....................................146
DTC Confirmation Procedure ................................146
Diagnosis Procedure .............................................147
P0137, P0157 HO2S2 .......................................152
Component Description ....................................... .152
On Board Diagnosis Logic ....................................152
DTC Confirmation Procedure ................................152
Overall Function Check .........................................153
Diagnosis Procedure .............................................153
Component Inspection ..........................................155
P0138, P0158 HO2S2 .......................................157
Component Description ....................................... .157
On Board Diagnosis Logic ....................................157
DTC Confirmation Procedure ................................157
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EC-3
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Overall Function Check .......................................
..
158
Diagnosis Procedure .............................................159
Component Inspection ..........................................162
P0139, P0159 HO2S2 ......................................164
Component Description ....................................... ..164
On Board Diagnosis Logic ....................................164
DTC Confirmation Procedure ................................164
Overall Function Check .........................................165
Diagnosis Procedure .............................................165
Component Inspection ..........................................167
P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION .......................................................
169
On Board Diagnosis Logic .................................. ..169
DTC Confirmation Procedure ................................169
Diagnosis Procedure .............................................170
P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION .......................................................
174
On Board Diagnosis Logic .................................. ..174
DTC Confirmation Procedure ................................174
Diagnosis Procedure .............................................175
P0181 FTT SENSOR ........................................179
Component Description ....................................... ..179
On Board Diagnosis Logic ....................................179
DTC Confirmation Procedure ................................179
Diagnosis Procedure .............................................180
Component Inspection ..........................................181
P0182, P0183 FTT SENSOR ...........................182
Component Description ....................................... ..182
On Board Diagnosis Logic ....................................182
DTC Confirmation Procedure ................................182
Diagnosis Procedure .............................................182
Component Inspection ..........................................184
P0222, P0223 APP SENSOR ...........................185
Component Description ....................................... ..185
On Board Diagnosis Logic ....................................185
DTC Confirmation Procedure ................................185
Diagnosis Procedure .............................................185
Component Inspection ..........................................188
P0300, P0301, P0302, P0303, P0304, P0305,
P0306, P0307, P0308 MISFIRE .......................
189
On Board Diagnosis Logic .................................. ..189
DTC Confirmation Procedure ................................189
Diagnosis Procedure .............................................190
P0327, P0328, P0332, P0333 KS ....................195
Component Description ....................................... ..195
On Board Diagnosis Logic ....................................195
DTC Confirmation Procedure ................................195
Diagnosis Procedure .............................................195
Component Inspection ..........................................197
P0335 CKP SENSOR (POS) ............................198
Component Description ....................................... ..198
On Board Diagnosis Logic ....................................198
DTC Confirmation Procedure .............................. ..198
Diagnosis Procedure .............................................199
Component Inspection ...........................................200
P0340 CMP SENSOR (PHASE) .....................202
Component Description .........................................202
On Board Diagnosis Logic .....................................202
DTC Confirmation Procedure ................................202
Diagnosis Procedure .............................................203
Component Inspection ...........................................204
P0420, P0430 THREE WAY CATALYST
FUNCTION ......................................................
206
On Board Diagnosis Logic ................................... ..206
DTC Confirmation Procedure ................................206
Overall Function Check .........................................207
Diagnosis Procedure .............................................207
P0441 EVAP CONTROL SYSTEM .................210
System Description ................................................210
On Board Diagnosis Logic .....................................210
DTC Confirmation Procedure ................................210
Overall Function Check .........................................211
Diagnosis Procedure .............................................211
P0442 EVAP CONTROL SYSTEM .................215
On Board Diagnosis Logic .....................................215
DTC Confirmation Procedure ................................215
Diagnosis Procedure .............................................216
Component Inspection ...........................................221
P0443 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE ......................
222
Description .............................................................222
On Board Diagnosis Logic .....................................222
DTC Confirmation Procedure ................................222
Diagnosis Procedure .............................................223
Component Inspection ...........................................225
P0444, P0445 EVAP CANISTER PURGE
VOLUME CONTROL SOLENOID VALVE ......
227
Description .............................................................227
On Board Diagnosis Logic .....................................227
DTC Confirmation Procedure ................................228
Diagnosis Procedure .............................................228
Component Inspection ...........................................229
P0447 EVAP CANISTER VENT CONTROL
VALVE .............................................................
230
Component Description .........................................230
On Board Diagnosis Logic .....................................230
DTC Confirmation Procedure ................................230
Diagnosis Procedure .............................................230
Component Inspection ...........................................232
P0448 EVAP CANISTER VENT CONTROL
VALVE .............................................................
234
Component Description .........................................234
On Board Diagnosis Logic .....................................234
DTC Confirmation Procedure ................................234
Revision: December 20092009 QX56