check oil INFINITI QX56 2011 Factory Owner's Manual

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U1000 CAN COMM CIRCUIT ......................... ....91
Description .......................................................... ....91
DTC Logic ...............................................................91
Diagnosis Procedure ...............................................91
U1010 CONTROL UNIT (CAN) ..........................92
Description .......................................................... ....92
DTC Logic ...............................................................92
Diagnosis Procedure ...............................................92
POWER SUPPLY AND GROUND CIRCUIT ......93
Description .......................................................... ....93
Diagnosis Procedure ...............................................93
4WD WARNING LAMP ......................................97
Component Function Check ................................ ....97
Diagnosis Procedure ...............................................97
4WD INDICATOR LAMP ....................................98
Component Function Check ................................ ....98
Diagnosis Procedure ...............................................98
SYMPTOM DIAGNOSIS ..............................99
HEAVY TIGHT-CORNER BRAKING SYMP-
TOM OCCURS . .............................................. ....
99
Description .......................................................... ....99
Diagnosis Procedure ...............................................99
4WD MODE DOES NOT CHANGE ..................100
Description .......................................................... ..100
Diagnosis Procedure .............................................100
4WD MODE INDICATOR LAMP CONTINUES
BLINKING .........................................................
101
Description .......................................................... ..101
Diagnosis Procedure .............................................101
4WD WARNING LAMP BLINKS QUICKLY .....102
Description .......................................................... ..102
4WD WARNING LAMP BLINKS SLOWLY .....103
Description .......................................................... ..103
Diagnosis Procedure .............................................103
INFORMATION DISPLAY IS NOT DIS-
PLAYED ...........................................................
104
Description .......................................................... ..104
Diagnosis Procedure .............................................104
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ..........................
105
NVH Troubleshooting Chart ................................ ..105
PERIODIC MAINTENANCE .......................106
TRANSFER FLUID ......................................... ..106
Inspection ............................................................ ..106
Draining .................................................................106
Refilling .................................................................106
REMOVAL AND INSTALLATION .............107
TRANSFER CONTROL UNIT .........................107
Removal and Installation ..................................... ..107
4WD MODE SWITCH ......................................108
Removal and Installation .......................................108
FRONT OIL SEAL ...........................................109
Exploded View .......................................................109
Removal and Installation .......................................109
REAR OIL SEAL .............................................111
Exploded View .......................................................111
Removal and Installation .......................................111
Adjustment .............................................................112
TRANSFER CONTROL ACTUATOR .............114
Exploded View .......................................................114
Removal and Installation .......................................114
Inspection ..............................................................114
TRANSFER HI-LO POSITION SENSOR ........116
Exploded View .......................................................116
Removal and Installation .......................................116
Inspection ..............................................................116
TRANSFER ROTARY POSITION SENSOR ...117
Exploded View .......................................................117
Removal and Installation .......................................117
Inspection ..............................................................118
TRANSFER LOCK POSITION SENSOR ........119
Exploded View .......................................................119
Removal and Installation .......................................119
Inspection ..............................................................119
TRANSFER FLUID TEMPERATURE SEN-
SOR .................................................................
120
Exploded View .......................................................120
Removal and Installation .......................................120
Inspection ..............................................................120
UNIT REMOVAL AND INSTALLATION ....121
TRANSFER ASSEMBLY ................................121
Exploded View ..................................................... ..121
Removal and Installation .......................................121
INPUT OIL SEAL ............................................123
Exploded View .......................................................123
Removal and Installation .......................................123
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... ...........................................
124
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
124
General Specifications ......................................... ..124
FRONT PROPELLER SHAFT: 2F P15
PREPARATION ........ .................................
125
PREPARATION ...............................................125
Revision: 2010 May2011 QX56

DLN-42
< BASIC INSPECTION >[TRANSFER: ATX90A]
ADDITIONAL SERVICE WHEN
REPLACING TRANSFER ASSEMBLY
ADDITIONAL SERVICE WHEN REPLACING TRANSFER ASSEMBLY
DescriptionINFOID:0000000006222236
Perform writing unit parameter, transfer fluid viscosity learning and initial calibration after replacing transfer
assembly. Refer to DLN-42, "
Work Procedure".
Work ProcedureINFOID:0000000006222237
NOTE:
In fail-safe mode, can not perform work s upport. (Except that DTC P181F is detected.)
1.WRITE UNIT PARAMETER
Perform writing unit parameter to control unit. Refer to DLN-48, "
Work Procedure".
>> GO TO 2.
2.PREPARATION BEFORE WORK
With CONSULT-III
1. Start the engine. CAUTION:
Never drive the vehicle.
2. Check “4WD MODE”, “T/M RANGE”, “COMER V HCL SPEED”, “MOTOR POWER SUP” of CONSULT-III
“DATA MONITOR” for “ALL MODE AWD/4WD”.
3. Continue the following condition more than 10 seconds.
>> GO TO 3.
3.PERFORM TRANSFER FLUID VISCOSITY LEARNING
With CONSULT-III
1. Select “OIL DETERIORATION INFO RESET” of CONSULT-III “WORK SUPPORT” for “ALL MODE AWD/
4WD”.
2. Select “Start”.
>> GO TO 4.
4.INITIAL CALIBRATION
With CONSULT-III
1. Select “START CALIBRATION” of CONSULT- III “WORK SUPPORT” for “ALL MODE AWD/4WD”.
2. Wait until the motor operation stop. (After approximately 10 seconds)
>> GO TO 5.
5.PERFORM SELF-DIAGNOSIS
With CONSULT-III
1. Erase self-diagnosis result for “ALL MODE AWD/4WD”.
2. Turn the ignition switch ON to OFF. CAUTION:
Wait for 10 seconds after turn ing ignition switch OFF.
3. Start the engine. CAUTION:
Never drive the vehicle.
4. Perform self-diagnosis for “ALL MODE AWD/4WD”.
4WD MODE : AUTO
T/M RANGE : N
COMPER VHCL SPEED : 0 km/h (Never drive the vehicle)
MOTOR POWER SUP : More than 11 V
Revision: 2010 May2011 QX56

TRANSFER FLUID VISCOSITY LEARNINGDLN-47
< BASIC INSPECTION > [TRANSFER: ATX90A]
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TRANSFER FLUID VISCOSITY LEARNING
DescriptionINFOID:0000000006222242
Perform transfer fluid viscosity learning and initial calibration after draining and refilling transfer fluid. Refer to
DLN-47, "
Work Procedure".
Work ProcedureINFOID:0000000006222243
NOTE:
In fail-safe mode, can not perform work s upport. (Except that DTC P181F is detected.)
1.PREPARATION BEFORE WORK
With CONSULT-III
1. Start the engine.
CAUTION:
Never drive the vehicle.
2. Check “4WD MODE”, “T/M RANGE”, “COMER VHCL SPEED”, “MOTOR POWER SUP” of CONSULT-III
“DATA MONITOR” for “ALL MODE AWD/4WD”.
3. Continue the following condition more than 10 seconds.
>> GO TO 2.
2.TRANSFER FLUID VISCOSITY LEARNING
With CONSULT-III
1. Select “OIL DETERIORATION INFO RESET” of CONSULT-III “WORK SUPPORT” for “ALL MODE AWD/
4WD”.
2. Select “Start”.
>> GO TO 3.
3.INITIAL CALIBRATION
With CONSULT-III
1. Select “START CALIBRATION” of CONSULT- III “WORK SUPPORT” for “ALL MODE AWD/4WD”.
2. Wait until the motor operation stop. (After approximately 10 seconds)
>> GO TO 4.
4.PERFORM SELF-DIAGNOSIS
With CONSULT-III
1. Erase self-diagnosis result for “ALL MODE AWD/4WD”.
2. Turn the ignition switch ON to OFF.
CAUTION:
Wait for 10 seconds after turning ignition switch OFF.
3. Start the engine.
CAUTION:
Never drive the vehicle.
4. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is
“DTC P181F” detected?
YES >> GO TO 1.
NO >> WORK END
4WD MODE : AUTO
T/M RANGE : N
COMPER VHCL SPEED : 0 km/h (Never drive the vehicle)
MOTOR POWER SUP : More than 11 V
Revision: 2010 May2011 QX56

DLN-80
< DTC/CIRCUIT DIAGNOSIS >[TRANSFER: ATX90A]
P1826 TRANSFER FLUID TEMPERATURE
P1826 TRANSFER FLUID TEMPERATURE
DTC LogicINFOID:0000000006222285
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.DTC REPRODUCTION PROCEDURE
With CONSULT-III
1. Start the engine and drive at 40 km/h (25 MPH) or more for approximately 1minute.
2. Perform self-diagnosis for “ALL MODE AWD/4WD”.
Is DTC
“P1826” detected?
YES >> Proceed to diagnosis procedure. Refer to DLN-80, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222286
1.CHECK TRANSFER FLUID TEMPER ATURE SENSOR POWER SUPPLY
1. Turn the ignition switch OFF.
2. Disconnect transfer fluid temperature sensor harness connector.
3. Turn the ignition switch ON. CAUTION:
Never start the engine.
4. Check the voltage between transfer fluid temperature sensor harness connector terminals.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK TRANSFER FLUID TE MPERATURE SENSOR CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect transfer control unit harness connector.
3. Check the continuity between transfer control uni t harness connector and transfer control actuator har-
ness connector.
4. Check the continuity between transfer flui d temperature sensor harness connector and ground.
DTC Display item Malfunction detected condition Possible cause
P1826 OIL TEMP SEN When vehicle speed is 40km/h or more
and transfer fluid temperature is lower
than normal
Transfer fluid temperature
 Malfunction of transfer fluid tempera-
ture sensor circuit (open)
When transfer fluid temperature is high-
er than normal Transfer fluid temperature
 Malfunction of transfer fluid tempera-
ture sensor circuit (short)
+ −
Voltag e
Transfer fluid temperature sensor
Connector Terminal F37 2 1 Approx. 5 V
Transfer control unit Transfer fluid temperature sensor Continuity
Connector Terminal Connector Terminal
E59 7
F37 2
Existed
36 1
Revision: 2010 May2011 QX56

DLN-106
< PERIODIC MAINTENANCE >[TRANSFER: ATX90A]
TRANSFER FLUID
PERIODIC MAINTENANCE
TRANSFER FLUID
InspectionINFOID:0000000006222324
FLUID LEAKAGE
Check transfer surrounding area (oil seal, drain plug, and filler plug etc.) for fluid leakage.
FLUID LEVEL
1. Remove filler plug (1) and gasket. Then check that fluid is filled
up from mounting hole for the filler plug.
CAUTION:
Never start engine whil e checking fluid level.
2. Set a new gasket onto filler plug (1), and install it on transfer and then tighten to the specified torque.
CAUTION:
Never reuse gasket.
DrainingINFOID:0000000006222325
1. Run the vehicle to warm up the transfer unit sufficiently.
2. Stop the engine.
3. Remove the drain plug (1) and drain transfer fluid.
4. Set a new gasket onto drain plug (1), and install it to transfer andtighten to the specified torque.
CAUTION:
Never reuse gasket.
RefillingINFOID:0000000006222326
1. Remove filler plug (1). Fill up with new transfer fluid up to mount-ing hole for the filler plug.
CAUTION:
Carefully fill the fluid. (Fill up for approximately 3 minutes.)
2. Leave the vehicle for 3 minutes, and check the fluid level again.
3. Set a new gasket onto filler plug, and install it on transfer and tighten to the specified torque.
CAUTION:
Never reuse gasket.
4. Perform learning of transfer fluid viscosity. Refer to DLN-47, "
Work Procedure".
Specified torque : 33 N·m (3.4 kg-m, 24 ft-lb)
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Specified torque : 33 N-m (3.4 kg-m, 24 ft-lb)
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Fluid grade and Viscosity : Refer to
MA-10, "Fluids
and Lubricants".
Fluid capacity : Refer to DLN-124, "
Gen-
eral Specifications".
Specified torque : 33 N-m (3.4 kg-m, 24 ft-lb)
JPDIE0295ZZ
Revision: 2010 May2011 QX56

DLN-110
< REMOVAL AND INSTALLATION >[TRANSFER: ATX90A]
FRONT OIL SEAL
1. Install front oil seal with a drift (A) (commercial service tool)
within the dimension (L) shown as follows.
CAUTION:
 Never reuse front oil seal.
 Apply transfer fluid onto circumference of oil seal.
2. Install the dust shield to the front shaft flange.
3. Install the front shaft flange.
4. Install the snap ring. CAUTION:
Never reuse the snap ring.
5. Install the O-ring to plug. CAUTION:
 Never reuse the O-ring.
 Never damage the O-ring.
6. Tighten the plug to specified torque.
7. Install front propeller shaft. Refer to DLN-129, "
Removal and Installation".
8. Fill with new transfer fluid, check fluid level and for fluid leakage. Refer to DLN-106, "
Inspection".
L : 5.3 – 5.7 mm
JPDIE0160ZZ
Revision: 2010 May2011 QX56

DLN-112
< REMOVAL AND INSTALLATION >[TRANSFER: ATX90A]
REAR OIL SEAL
1. Install rear oil seal, with a drift (A) [SST: KV40104710 ( —
] within the dimension (L) show as follows.
CAUTION:
 Never reuse front oil seal.
 Apply transfer fluid onto circumference of oil seal.
2. Install the dust shield to the rear companion flange.
3. Install the rear companion flange to main shaft. CAUTION:
 Align the matching marks (A) of main shaft and rear com-panion flange.
 Install bolt (A) (M12 ×1.75 mm) to main shaft, then install
the rear companion flange by hammering while pulling the
bolt.
4. Install the O-ring (3) to gap between rear companion flange (1) and main shaft (2).
CAUTION:
 Never reuse the O-ring.
 Never damage the O-ring.
5. Select adjusting shim. Refer to DLN-112, "
Adjustment".
6. Install adjusting shim.
7. Install the snap ring.
8. Install the rear propeller shaft. Refer to DLN-144, "
Removal and
Installation".
9. Check fluid level and for fluid leakage. Refer to DLN-106,
"Inspection".
AdjustmentINFOID:0000000006222333
ADJUSTING SHIM
1. Remove the snap ring.
2. Remove the adjusting shim.
3. Remove the O-ring.L : 2.8 – 3.2
JPDIE0164ZZ
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Revision: 2010 May2011 QX56

REAR OIL SEALDLN-113
< REMOVAL AND INSTALLATION > [TRANSFER: ATX90A]
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4. Install the thinnest adjusting shim.
5. Install the snap ring to main shaft.
6. Install the bolt (A) (M12 ×1.75 mm) to main shaft, then hummer
the rear companion flange while pulling the bolt.
7. Fit a dial indicator onto the end of main shaft.
8. Check the clearance between rear companion flange and main shaft during pushing the bolt (A) at direction.
9. Use the formula below to calculate adjusting shim thickness.
CAUTION:
Adjusting shim thickness is in step of 0.1 mm. When a calculation result includes the second dec-
imal place, it must be rounded down.
10. Select the proper adjusting shim. For selecting adj usting shim, refer to the latest parts information.
JPDIE0165ZZ
Shim selection equation:
T = T
0 + (C − 0.1)
T: Correct shim thickness
T
0: The thinnest shim thickness
C: Measured clearance between rear companion flange and main shaft
Example:
T = 2.1 + (0.34 − 0.1) = 2.34
T
0:2.1
C: 0.34
Caluculated value... T = 2.34 mm
Used shim... T = 2.3 mm
JPDIE0167ZZ
Revision: 2010 May2011 QX56

DLN-114
< REMOVAL AND INSTALLATION >[TRANSFER: ATX90A]
TRANSFER CONTROL ACTUATOR
TRANSFER CONTROL ACTUATOR
Exploded ViewINFOID:0000000006222334
Removal and InstallationINFOID:0000000006222335
REMOVAL
CAUTION:
If DTC about transfer control actuator is
detected, perform inspection after removal.
1. Turn the ignition switch OFF.
2. Disconnect negative battery terminal. CAUTION:
Wait for 5 seconds after turn ing ignition switch OFF.
3. Disconnect the transfer control actuator connector.
4. Remove the bolts and detach the transfer control actuator.
5. Perform inspection after removal. Refer to DLN-114, "
Inspection".
INSTALLATION
Note the following, and installing the reverse order of removal.
 Never damage oil seal of transfer motor.
 If transfer control actuator has been replaced, perform writing the unit parameter. Refer to DLN-48, "
Work
Procedure"
 Perform inspection after installation. Refer to DLN-114, "Inspection"
InspectionINFOID:0000000006222336
INSPECTION AFTER REMOVAL
1. Check the oil seal assembled transfer control act uator for wear, crack and damage. Replace if there is
malfunction.
2. Check the transfer assembly as follows.
1. Transfer assembly 2. Transfer control actuator
: Vehicle front
Refer to GI-4, "
Components" for symbols not described above.
JPDIE0273GB
Revision: 2010 May2011 QX56

DLN-122
< UNIT REMOVAL AND INSTALLATION >[TRANSFER: ATX90A]
TRANSFER ASSEMBLY
 When installing the transfer to the
transmission, install the mount-
ing bolts following the standard below, tighten bolts to the specified
torque.
 When installing transfer breather hose, make sure t here are no pinched or restricted areas on the transfer
breather hose caused by bending or winding.
- Install the transfer breather hose (1) of transmission side with the
paint mark (A) facing upward and the mark (B) (: ) facing right
side.
- Install the transfer breather hose (1) of transfer side with the paint mark (A) facing upward, and insert breather hose to breather tube
(2) until dimension (B) shown as follows.
- Be sure to fix breather hose in (A) and (B) positions. Fix with the
paint mark facing upward in the (A) position.
 Check oil level and check for oil leakage after installation. Refer to DLN-106, "
Inspection".
 If replacing transfer assembly, perform writing unit parameter,
learning of fluid viscosity and initial calibration. Refer to DLN-42,
"Work Procedure".
Bolt symbol A B
Insertion direction Transfer to transmission Transmission to transfer
: Tightening the bolt with bracket
JPDIE0259ZZ
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B: 20 mm (0.79 in)
JPDIE0251ZZ
JPDIE0248ZZ
Revision: 2010 May2011 QX56