engine oil INFINITI QX56 2011 Factory User Guide

CAB MOUNTING INSULATORDLK-253
< REMOVAL AND INSTALLATION >
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 Remove brake tube from connector (front wheel well LH and RH side). Refer to BR-22, "FRONT :
Exploded View"
Vehicle center side
 Remove A/T control cable from manual lever. Refer to TM-178, "
Removal and Installation".
 Separate parking brake rear cable (LH and RH) from parking brake front cable. Refer to PB-5, "
Removal
and Installation".
 Remove engine room harness connector (frame assembly RH center side). Refer to PG-146, "
Engine
Room Harness"
- Remove harness connector protector.
- Disconnect chassis harness connector from engine room harness connector.
- Remove harness bracket bolt, and then remove engi ne room harness connector from frame assembly.
Vehicle rear side
 Remove EVAP hose (canister side).
 Remove rear final drive breather hose from air breather tube (body side). Refer to DLN-201, "
Removal
and Installation".
 Disconnect body harness connector from chassis harness connectors (frame assembly LH rear side).
Refer to PG-150, "
Body Harness"
6. Set safety stand to frame assembly. Release arm of 2-pole lift.
7. Remove cab mounting insulator bolts.
8. Set arm of 2-pole lift to body side sill portion of body.
9. Slowly lift 2-pole lift.
CAUTION:
 Check that there is no inte rference with the vehicle.
 Check that all connection points are disconnected.
10. Remove cab mounting insulator.
INSTALLATION
Note the following items, and then install in the reverse order of removal.
CAUTION:
 Before starting engine, check oil/fl uid levels including engine coolant and engine oil. If levels are
less than the required quantity, fill to the specified level. Refer to MA-10, "
Fluids and Lubricants".
 Warm up engine thoroughly to check that there is no leakage of fuel, exhaust gases, or any oil/fluids
including engine oil and engine coolant.
Revision: 2010 May2011 QX56

DIAGNOSIS SYSTEM (TRANSFER CONTROL UNIT)
DLN-23
< SYSTEM DESCRIPTION > [TRANSFER: ATX90A]
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WORK SUPPORT
*: “LOCK SLEEVE SENSOR” means transfer lock position sensor.
VHCL/S SEN-RR [km/h] X Wheel speed (rear) average calculated by
transfer control.
ENG SPEED [rpm] X Engine status via CAN communication line is
displayed.
INTERNL SPEED SEN [count] X Transfer internal speed sensor status is dis-
played.
TRANSFER TORQUE [Nm] X Commanded transfer communication torque is
displayed.
UNIT PARAMETER [A1 - A9, B1 - B9, C1 - C9, D1
- D9, E1 - E9, F1 - F9, G1 - G9, H1 - H9, J1 - J9] Unit parameter of transfer recognized by trans-
fer control unit is displayed.
Monitor item (Unit)
SELECT MONITOR ITEM
Remarks
ECU INPUT
SIGNALS MAIN SIG-
NALS
Function Description
UNIT CHARACTERISTIC WRITE Writes the unit parameter of transfer to transfer control unit.
START CALIBRATION Perform initial calibration of transfer control unit.
LOCK SLEEVE SENSOR
* INITIALIZE Format learning the transfer lock position sensor written to transfer control unit.
LOCK SLEEVE SENSOR
* LEARNING Perform learning the transfer lock position sensor.
OIL DETERIORATION INFO RESET Format the transfer fl uid viscosity written to transfer control unit.
Revision: 2010 May2011 QX56

TRANSFER CONTROL UNITDLN-29
< ECU DIAGNOSIS INFORMATION > [TRANSFER: ATX90A]
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DTC Inspection Priority ChartINFOID:0000000006222229
If some DTCs are displayed at the same time, per form inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000006222230
Priority Detected items (DTC)
1  U1000 CAN COMM CIRCUIT
 U1010 CONTROL UNIT (CAN)
2  P1802 CONTROL UNIT 1
 P1803 CONTROL UNIT 2
 P1804 CONTROL UNIT 3
 P1809 CONTROL UNIT 4
 P180C SEN POWER SUPPLY (5V)
 P180E SEN POWER SUPPLY (8V)
 P1811 BATTERY VOLTAGE
 P181B INCOMP SELFSHUT
 P181C MOTOR POWER SUPPLY
 P181F INCOMP CALIBRATION
3  P1807 VECL SPEED SEN-AT
 P1808 VECL SPEED SEN-ABS
 P1816 PNP SW/CIRC
 P181E ST ANGLE SEN SIG
 P1820 ENGINE SPEED SIG
 P1829 THROTTLE POSI SEN
 P1830 ABS OP SIG
 P1831 VDC OP SIG
 P1832 TCS OP SIG
4  P180D ROTARY POSITION SEN
 P1813 4WD MODE SW
 P181A MOTOR TEMP SEN
 P1826 OIL TEMP SEN
 P182A HI-LO POSITION SEN
 P182B LOCK POSITION SEN
5  P180F MOTOR SYSTEM
 P1817 SHIFT ACTUATOR
DTC Display Items Reference
P1802 CONTROL UNIT 1 DLN-51, "
DTC Logic"
P1803 CONTROL UNIT 2DLN-51, "DTC Logic"
P1804 CONTROL UNIT 3DLN-51, "DTC Logic"
P1807 VHCL SPEED SEN-ATDLN-52, "DTC Logic"
P1808 VHCL SPEED SEN-ABSDLN-53, "DTC Logic"
P1809 CONTROL UNIT 4DLN-51, "DTC Logic"
P180C SEN POWER SUPPLY (5V) DLN-54, "DTC Logic"
P180D ROTARY POSITION SENDLN-57, "DTC Logic"
P180E SEN POWER SUPPLY (8V)DLN-59, "DTC Logic"
P180F MOTOR SYSTEMDLN-61, "DTC Logic"
P1811 BATTERY VOLTAGEDLN-64, "DTC Logic"
P1813 4WD MODE SW DLN-67, "DTC Logic"
P1816 PNP SW/CIRCDLN-69, "DTC Logic"
P1817 SHIFT ACTUATORDLN-70, "DTC Logic"
P181A MOTOR TEMP SEN DLN-72, "DTC Logic"
P181B IMCOMP SELFSHUTDLN-74, "DTC Logic"
Revision: 2010 May2011 QX56

DLN-30
< ECU DIAGNOSIS INFORMATION >[TRANSFER: ATX90A]
TRANSFER CONTROL UNIT
P181C MOTOR POWER SUPPLY
DLN-76, "DTC Logic"
P181E ST ANGLE SEN SIGDLN-77, "DTC Logic"
P181F INCOMP CALIBRATIONDLN-78, "DTC Logic"
P1826 OIL TEMP SENDLN-80, "DTC Logic"
P1820 ENGINE SPEED SIGDLN-79, "DTC Logic"
P1829 THROTTLE POSI SENDLN-82, "DTC Logic"
P182A HI-LO POSITION SEN DLN-83, "DTC Logic"
P182B LOCK POSITION SENDLN-85, "DTC Logic"
P1830 ABS OP SIGDLN-88, "DTC Logic"
P1831 VDC OP SIGDLN-89, "DTC Logic"
P1832 TCS OP SIGDLN-90, "DTC Logic"
U1000 CAN COMM CIRCUIT DLN-91, "DTC Logic"
U1010 CONTROL UNIT (CAN)DLN-92, "DTC Logic"
DTC Display Items Reference
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)
JPDIE0295ZZ
Specified torque : 33 N-m (3.4 kg-m, 24 ft-lb)
JPDIE0245ZZ
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

FRONT DIFFERENTIAL GEAR OILDLN-155
< PERIODIC MAINTENANCE > [FRONT FINAL DRIVE: R180A]
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PERIODIC MAINTENANCE
FRONT DIFFERENTIAL GEAR OIL
InspectionINFOID:0000000006222378
OIL LEAKAGE
Check that oil is not leaking from the front 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-167, "
Exploded View".
CAUTION:
Never reuse gasket.
DrainingINFOID:0000000006222379
1. Stop 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-167,
"Exploded View".
CAUTION:
Never reuse gasket.
RefillingINFOID:0000000006222380
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-167,
"Exploded View".
CAUTION:
Never reuse gasket.
JPDID0312ZZ
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Oil grade and Viscosity : Refer to MA-10, "Fluids
and Lubricants".
Oil capacity : Refer to DLN-185, "
Gen-
eral Specifications".
JPDID0312ZZ
Revision: 2010 May2011 QX56

REAR DIFFERENTIAL GEAR OILDLN-193
< PERIODIC MAINTENANCE > [REAR FINAL DRIVE: R230]
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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