2010 INFINITI QX56 wheel

DLN-3
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DLN
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PRECAUTIONS .............................................. ..120
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
120
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ..
120
Precaution for Transfer Assembly and Transfer
Control Unit Replacement .....................................
121
Precaution .............................................................121
Service Notice .......................................................122
PREPARATION .........................................123
PREPARATION .............................................. ..123
Special Service Tool ........................................... ..123
Commercial Service Tool ......................................125
ON-VEHICLE MAINTENANCE ..................127
TRANSFER OIL FILTER ................................ ..127
Removal and Installation .......................................127
TRANSFER FLUID ......................................... ..129
Replacement ....................................................... ..129
Inspection ..............................................................129
ON-VEHICLE REPAIR ...............................130
TRANSFER CONTROL UNIT ........................ ..130
Removal and Installation .......................................130
FRONT OIL SEAL ............................................131
Removal and Installation .......................................131
REAR OIL SEAL ..............................................133
Removal and Installation .......................................133
SIDE OIL SEAL .............................................. ..135
Removal and Installation .......................................135
TRANSFER CONTROL DEVICE ................... ..136
Removal and Installation .......................................136
AIR BREATHER HOSE .................................. ..137
Removal and Installation .......................................137
TRANSFER MOTOR ...................................... ..140
Removal and Installation .......................................140
REMOVAL AND INSTALLA TION .............141
TRANSFER ASSEMBLY ............................... ..141
Removal and Installation .......................................141
DISASSEMBLY AND ASSEMBLY ........... .142
TRANSFER ASSEMBLY ............................... ..142
Disassembly and Assembly ................................ ..142
SERVICE DATA AND SPECIFICATIONS
(SDS) ......... ................................. ................
179
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
179
General Specification .......................................... ..179
Inspection and Adjustment ....................................179
PROPELLER SHAFT: 2F1310
PRECAUTION ...... ......................................
181
PRECAUTIONS ...............................................181
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
181
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
181
PREPARATION .........................................183
PREPARATION ...............................................183
Commercial Service Tool .................................... ..183
SYMPTOM DIAGNOSIS ............................184
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING .........................
184
NVH Troubleshooting Chart ................................ ..184
ON-VEHICLE REPAIR ...............................185
PROPELLER SHAFT ......................................185
On-Vehicle Service .............................................. ..185
REMOVAL AND INSTALLATION .............186
PROPELLER SHAFT ......................................186
Removal and Installation ..................................... ..186
DISASSEMBLY AND ASSEMBLY ............188
PROPELLER SHAFT ......................................188
Disassembly and Assembly ................................. ..188
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .......................................... .
190
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
190
General Specification .......................................... ..190
Snap Ring ..............................................................190
PROPELLER SHAFT: 2S1410
PRECAUTION ...... ......................................
191
PRECAUTIONS ...............................................191
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
191
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
191
PREPARATION .........................................193
PREPARATION ...............................................193
Revision: April 20092010 QX56

DLN-4
Commercial Service Tool ......................................193
SYMPTOM DIAGNOSIS ............................194
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
194
NVH Troubleshooting Chart ................................ ..194
ON-VEHICLE REPAIR ...............................195
PROPELLER SHAFT ..................................... .195
On-Vehicle Service .............................................. ..195
REMOVAL AND INSTALLATION ..............196
PROPELLER SHAFT ..................................... .196
Removal and Installation ..................................... ..196
DISASSEMBLY AND ASSEMBLY ............199
PROPELLER SHAFT ..................................... .199
Disassembly and Assembly ................................. ..199
SERVICE DATA AND SPECIFICATIONS
(SDS) ........................................................ ..
201
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... .
201
General Specification .......................................... ..201
Snap Ring ..............................................................201
FRONT FINAL DRIVE: M205
PRECAUTION .............. ..............................
203
PRECAUTIONS .............................................. .203
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ..
203
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
203
Precaution for Servicing Front Final Drive .............204
PREPARATION ..........................................205
PREPARATION .............................................. .205
Special Service Tool ............................................ ..205
Commercial Service Tool ......................................207
SYMPTOM DIAGNOSIS ............................208
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
208
NVH Troubleshooting Chart ................................ ..208
ON-VEHICLE MAINTENANCE ..................209
DIFFERENTIAL GEAR OIL ............................ .209
Changing Front Differential Gear Oil .....................209
Checking Front Differential Gear Oil .................... ..209
ON-VEHICLE REPAIR ...............................210
SIDE OIL SEAL .............................................. ..210
Removal and Installation .......................................210
FRONT OIL SEAL ............................................211
Removal and Installation .......................................211
CARRIER COVER .......................................... ..214
Removal and Installation .......................................214
REMOVAL AND INSTALLA TION .............215
FRONT FINAL DRIVE .................................... ..215
Removal and Installation .......................................215
DISASSEMBLY AND ASSEMBLY ...........217
FRONT FINAL DRIVE .................................... ..217
Disassembly and Assembly ................................. .217
SERVICE DATA AND SPECIFICATIONS
(SDS) ........ .................................................
234
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ..
234
General Specification ........................................... .234
Inspection and Adjustment ....................................234
REAR FINAL DRIVE: R230
PRECAUTION ............... ............................
236
PRECAUTIONS .............................................. ..236
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
236
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ................................
236
Precaution for Servicing Rear Final Drive .............237
PREPARATION .........................................238
PREPARATION .............................................. ..238
Special Service Tool ............................................ .238
Commercial Service Tool ......................................240
SYMPTOM DIAGNOSIS ...........................242
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... ..
242
NVH Troubleshooting Chart ..................................242
DESCRIPTION ................................................ ..243
Cross-Sectional View ........................................... .243
ON-VEHICLE MAINTENANCE .................244
DIFFERENTIAL GEAR OIL ..............................244
Changing Rear Differential Gear Oil .................... .244
Checking Rear Differential Gear Oil ......................244
ON-VEHICLE REPAIR ..............................245
FRONT OIL SEAL ............................................245
Revision: April 20092010 QX56

DIAGNOSIS AND REPAIR WORKFLOWDLN-9
< BASIC INSPECTION > [ATX14B]
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Flash rapidly>>Refer to DLN-112, "Diagnosis Procedure".
Flash slowly>>Refer to DLN-113, "
Diagnosis Procedure".
NO >> GO TO 2.
2.CHECK TIGHT CORNER BRAKING SYMPTOM (1)
1. Set 4WD shift switch to AUTO position.
2. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned.
Does tight corner braking symptom occur?
YES >> GO TO DLN-114, "Diagnosis Procedure".
NO >> GO TO 3.
3.CHECK TIGHT CORNER BRAKING SYMPTOM (2)
1. Set 4WD shift switch to 4HI position.
2. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned.
Does tight corner braking symptom occur?
YES >> Inspection End.
NO >> GO TO DLN-118, "
Diagnosis Procedure".
Revision: April 20092010 QX56

DLN-14
< FUNCTION DIAGNOSIS >[ATX14B]
4WD SYSTEM
• Displays 4LO condition while engine is running. 4LO indicator lamp flashes if transfer gear does not shift
completely under 2WD, AUTO, 4H ⇔4LO. (When 4WD warning lamp is turned on, 4LO indicator lamp is
turned off.)
• Turns ON for approximately 1 second when ignition switch is turned ON, for purpose of lamp check.
4WD WARNING LAMP
Turns on or flashes when there is a malfunction in 4WD system.
Also turns on when ignition switch is turned ON, for purpose of lamp che\
ck. Turns OFF approximately 1 sec-
ond after the engine starts if system is normal.
4WD Warning Lamp Indication
ATP WARNING LAMP
When the A/T selector lever is in P position, the vehicle may move if the transfer case is in neutral. ATP warn-
ing lamp is turned on to indicate this condition to the driver.
LINE PRESSURE SWITCH
• With the transfer system design, control of the oil pressure provides the transmission of drive torque to the
front wheels. The main pressure to control the oil pressure is referred to as the line pressure.
• The line pressure switch determines whether or not adequate line pressure has built up under different oper- ating conditions.
• The line pressure switch closes when line pressure is produced.
• The line pressure switch senses line pressure abnormalities and turns the 4WD warning lamp ON.
CLUTCH PRESSURE SWITCH
• The clutch pressure switch determines whether or not adequate clutch pressure has built up under different
operating conditions.
• The clutch pressure switch closes when clutch pressure is produced.
• The clutch pressure switch senses clutch pressure abnormalities and turns the 4WD warning lamp ON.
WAIT DETECTION SWITCH
• The wait detection switch operates when there is circulating torque produced in the propeller shaft (L→H) or
when there is a phase difference between 2-4 sleeve and clutch drum (H →L). After the release of the circu-
lating torque, the wait detection switch helps provi de the 4WD lock gear (clutch drum) shifts. A difference
may occur between the operation of the 4WD shift swit ch and actual drive mode. At this point, the wait
detection switch senses an actual drive mode.
• The wait detection switch operates as follows.
- 4WD lock gear (clutch drum) locked: ON
- 4WD lock gear (clutch drum) released: OFF
• The wait detection switch senses an actual drive mode and the 4WD shift indicator lamp indicates the vehi-
cle drive mode.
ATP SWITCH
ATP switch detects if transfer case is in neutral by the position of the L-H shift fork.
NOTE:
Transfer case may be in neutral when shifting between 4H-4LO.
NEUTRAL-4LO SWITCH
The neutral-4LO switch detects that transfer gear is in neutral or 4LO (or shifting from neutral to 4LO) condi-
tion by L-H shift fork position.
Condition 4WD warning lamp
System normal OFF
Lamp check Turns ON when ignition switch is turned ON.
Turns OFF after engine start.
4WD system malfunction ON
During self-diagnosis Flashes malfunction mode.
Large difference in diameter of front/
rear tires Flashes slow (1 flash / 2 seconds)
(Continues to flash until the ignition switch is turned OFF)
High fluid temperature in transfer case Flashes rapidly (2 flashes / 1 second)
(Continues to flash until fluid temperature returns to normal)
Revision: April 20092010 QX56

4WD SYSTEMDLN-15
< FUNCTION DIAGNOSIS > [ATX14B]
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TRANSFER FLUID TEMPERATURE SENSOR
The transfer fluid temperature sensor detects the trans fer fluid temperature and sends a signal to the transfer
control unit.
TRANSFER MOTOR
• The transfer motor drives the sub-oil pump to provi de proper lubrication and oil pressure control when the
vehicle is at standstill, during low-speed operations or is being driven in reverse.
• The main oil pump is operated by the driving force of t he mainshaft. In other words, sufficient oil pressure
buildup does not occur when the vehicle is at standsti ll or during low-speed operations. While the vehicle is
being driven in reverse, the main oil pump rotates in the reverse direction. Therefore the main oil pump does
not discharge oil pressure. During any of the above vehi cle operations, the transfer motor drives the sub-oil
pump to compensate for insufficient oil pressure.
• The transfer motor operates as follows:
- The motor relay turns OFF in the 2WD mode.
- The motor relay operates as described in the table below in modes other than the 2WD mode.
• 4WD shift switch, transmission range switch, Neutral-4LO switch, vehicle speed sensor and throttle position
sensor are used in conjunction with the transfer motor.
Transfer Motor Relay Operation
*: After 2.5 seconds have elapsed.
CLUTCH PRESSURE SOLENOID VALVE
The clutch pressure solenoid valve distributes front and rear torque in AUTO mode.
2-4WD SHIFT SOLENOID VALVE
The 2-4WD shift solenoid valve operates to apply oil pressure to the wet-multiplate clutch, depending on the
drive mode. The driving force is transmitted to the front wheels through the clutch so the vehicle is set in the
4WD mode. Setting the vehicle in the 2WD mode requires no pressure buildup. In other words, pressure force
applied to the wet-multiplate clutch becomes zero.
TRANSFER CONTROL DEVICE
Integrates actuator motor and actuator position switch.
4WD shift switch A/T selector lever position Vehicle speed
(VSS) Accelerator pedal position Motor relay drive
command
2WD ———OFF
4H (LOCK) and 4LO N position
0— ON
P position 00 - 0.07/8
OFF*
0.07/8 - 1/8 HOLD
1/8 - MAX ON
Other than R position 0 < VSS ≤
50 km/h (31 MPH)
— ON
50 km/h (31 MPH) < VSS < 55 km/h (34 MPH) HOLD
55 km/h (34 MPH) ≤ VSS OFF
R position —— ON
R position —— ON
AUTO P or N position 0
0 - 0.07/8
OFF*
0.07/8 - 1/8 HOLD
1/8 - MAX ON
0 < VSS ≤ 50 km/h (31 MPH)
— ON
50 km/h (31 MPH) < VSS < 55 km/h (34 MPH) HOLD
55 km/h (34 MPH) ≤ VSS OFF
Other than R, P and N posi-
tion 0 < VSS ≤
50 km/h (31 MPH)
— ON
50 km/h (31 MPH) < VSS < 55 km/h (34 MPH) HOLD
55 km/h (34 MPH) ≤ VSS OFF
Revision: April 20092010 QX56

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)DLN-19
< FUNCTION DIAGNOSIS > [ATX14B]
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12. Move A/T selector lever to N position.
13. Turn 4WD shift switch to AUTO position.
14. Move A/T selector lever to P position.
15. Read the flickering of 4WD warning lamp.
Self-diagnosis example
ERASE SELF-DIAGNOSIS
• In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is
stored into the control unit as necessary during use by the user. This memory is not erased no matter how
many times the ignition switch is turned ON and OFF.
• However, this information is erased by turning igni tion switch OFF after performing self-diagnostics or by
erasing the memory using the CONSULT-III.
DATA MONITOR MODE
Operation Procedure
1. Connect CONSULT-III.
2. Touch DATA MONITOR.
3. Select from SELECT MONITOR ITEM, screen of data monitor mode is displayed.
NOTE:
When malfunction is detected, CONSUL T-III performs REAL-TIME DIAGNOSIS.
Also, any malfunction detected while in th is mode will be displayed at real time.
Display Item List
×: Standard –: Not applicable
PDIA0227E
Monitored item (Unit) Monitor item selection
Remarks
ECU INPUT
SIGNALS MAIN
SIGNALS SELEC-
TION FROM MENU
VHCL/S SEN·FR [km/h] or [mph] ×–×Wheel speed calculated by ABS actuator and
electric unit (control unit).
Signal input with CAN communication line.
VHCL/S SEN·RR [km/h] or [mph] ×–×Wheel speed calculated by TCM.
Signal input with CAN communication line.
ENGINE SPEED [rpm] ×–×Engine speed calculated by ECM.
Signal input with CAN communication line.
THRTL POS SEN [V] ×–×Accelerator peda
l position (APP) sensor sig-
nal voltage is displayed.
Signal input with CAN communication line.
FLUID TEMP SE [V] ×–×Transfer fluid temperature sensor signal volt-
age is displayed.
BATTERY VOLT [V] ×–×Power supply voltage for transfer control unit.
2WD SWITCH [On/Off] ×–×4WD shift switch status is displayed.
AUTO SWITCH [On/Off] ×–×4WD shift switch status is displayed.
LOCK SWITCH [On/Off] ×–×4WD shift switch status is displayed.
(LOCK means 4H of 4WD shift switch.)
Revision: April 20092010 QX56

TRANSFER CONTROL UNITDLN-81
< ECU DIAGNOSIS > [ATX14B]
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ECU DIAGNOSIS
TRANSFER CONTROL UNIT
Reference ValueINFOID:0000000005148853
VALUE ON THE DIAGNOSIS TOOL
CONSULT-III data monitor item
Monitored item [Unit] Content ConditionDisplay value
VHCL/S SEN·FR [km/h]
or [mph] Wheel speed (Front
wheel) Vehicle stopped
0 km/h (0 mph)
Vehicle running
CAUTION:
Check air pressure of tire under standard condition. Approximately
equal to the indica-
tion on speedome-
ter (Inside of
±
10%)
VHCL/S SEN·RR [km/h]
or [mph] Wheel speed (Rear
wheel) Vehicle stopped
0 km/h (0 mph)
Vehicle running
CAUTION:
Check air pressure of tire under standard condition. Approximately
equal to the indica-
tion on speedome-
ter (Inside of
±
10%)
ENGINE SPEED [rpm ] Engine speed Engine stopped
(Engine speed: Less than 400 rpm)
0 rpm
Engine running
(Engine speed: 400 rpm or more) Approximately
equal to the indica-
tion on tachometer
THRTL POS SEN [V] Accelerator
pedal posi-
tion (APP) sensor signal
voltage Accelerator pedal: Released
Approx. 0.5V
Accelerator pedal: Fully depressed Approx. 4.0V
FLUID TEMP SE [V] Transfer fluid tempera-
ture signal voltage Transfer fluid temperature approx. 20 - 80
°C (68 - 176 °F) Approx. 1.1 - 0.3V
BATTERY VOLT [V] Power supply voltage for
transfer control unit Ignition switch: ON
Battery voltage
2WD SWITCH [ON/OFF] Input condition from 4WD
shift switch 4WD shift switch: 2WD
ON
4WD shift switch: AUTO, 4H or 4LO OFF
AUTO SWITCH [ON/
OFF] Input condition from 4WD
shift switch 4WD shift switch: AUTO
ON
4WD shift switch: 2WD, 4H or 4LO OFF
LOCK SWITCH [ON/
OFF] Input condition from 4WD
shift switch 4WD shift switch: 4H
ON
4WD shift switch: 2WD, AUTO or 4LO OFF
4L SWITCH [ON/OFF] Input condition from 4WD
shift switch 4WD shift switch: 4LO
ON
4WD shift switch: 2WD, AUTO or 4H OFF
N POSI SW TF [ON/
OFF] Condition of neutral-4LO
switch • Vehicle stopped
• Engine running
• A/T selector lever N posi-
tion
• Brake pedal depressed 4WD shift switch: 2WD,
AUTO or 4H
OFF
4WD shift switch: 4H to
4LO (While actuator mo-
tor is operating.) OFF
→ON
4WD shift switch: 4LO to
4H (While actuator motor
is operating.) ON
→OFF
4WD shift switch: 4LO ON
Revision: April 20092010 QX56

DLN-102
< SYMPTOM DIAGNOSIS >[ATX14B]
4WD SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
4WD SYSTEM SYMPTOMS
Symptom TableINFOID:0000000005148856
If 4WD warning lamp turns ON, perform self-diagnosis. Refer to DLN-18, "CONSULT-III Function (ALL MODE AWD/4WD)".
NOTE:
• Light tight-corner braking symptom may occur depending on driving conditions in AUTO mode. This is not a
malfunction.
• Heavy tight-corner braking symptom occurs when vehicle is driven in the following conditions: 4WD shift
switch is 4H or 4LO, steering wheel is turned fully to either side.
Symptom ConditionReference page
4WD shift indicator lamp and 4LO indicator lamp do not turn ON
(4WD shift indicator lamp and 4LO indicator lamp check) Ignition switch: ON
DLN-103
4WD warning lamp does not turn ON
(4WD warning lamp check) Ignition switch: ON
DLN-105
4WD shift indicator lamp or 4LO indicator lamp does not change Engine runningDLN-107
ATP warning lamp does not turn ON Engine runningDLN-109
4WD shift indicator lamp keeps flashing Engine runningDLN-111
4WD warning lamp flashes rapidly (2 times/second) While drivingDLN-112
4WD warning lamp flashes slowly
(1 time/2 seconds) While driving
DLN-113
Heavy tight-corner braking symptom occurs
(See NOTE.) • While driving
•AUTO mode
• Steering wheel is turned fully
to either side DLN-114
ATP switch does not operate
Engine runningDLN-116
4WD system does not operate While drivingDLN-118
Revision: April 20092010 QX56