2011 INFINITI QX56 engine oil

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
JPDID0313ZZ
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

EC-1
ENGINE
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SECTION EC
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CONTENTS
ENGINE CONTROL SYSTEM
VK56VD
PRECAUTION ................ ...............................
9
PRECAUTIONS .............................................. .....9
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
9
Precaution for Procedure without Cowl Top Cover ......9
Precautions For Xenon Headlamp Service ...............9
On Board Diagnostic (OBD) System of Engine
and A/T ....................................................................
10
General Precautions ...............................................10
PREPARATION ...........................................14
PREPARATION .............................................. ....14
Special Service Tools .......................................... ....14
Commercial Service Tools ......................................14
SYSTEM DESCRIPTION .............................16
COMPONENT PARTS ................................... ....16
Component Parts Location .................................. ....16
Component Description ...........................................19
Accelerator Pedal Position Sensor ..........................21
Air Fuel Ratio (A/F) Sensor 1 ..................................21
ASCD Brake Switch & Stop Lamp Switch ...............21
ASCD Steering Switch ............................................21
ASCD Indicators ......................................................21
Battery Current Sensor (With Battery Tempera-
ture Sensor) ............................................................
22
Camshaft Position Sensor .......................................22
Crankshaft Position Sensor .....................................23
ECM ........................................................................23
Electric Throttle Control Actuator ............................23
Electrically-controlled cooling fan coupling .............24
Engine Coolant Temperature Sensor ......................25
Engine Oil Temperature Sensor ..............................25
EVAP Control System Pressure Sensor .................26
EVAP Canister Vent Control Valve .........................26
EVAP Canister Purge Volume Control Solenoid
Valve .................................................................... ....
26
Fuel Injector .............................................................26
Fuel Level Sensor ....................................................26
Fuel Pump Control Module ......................................27
Fuel Rail Pressure Sensor .......................................27
Fuel Tank Temperature Sensor ...............................27
Heated Oxygen Sensor 2 ........................................27
High Pressure Fuel Pump .......................................28
ICC Brake Switch & Stop Lamp Switch ...................29
ICC Steering Switch ................................................29
Ignition Coil With Power Transistor .........................29
Intake Valve Timing Control Solenoid Valve ...........29
Knock Sensor ...................................................... ....30
Low Fuel Pressure Sensor ......................................30
Low Pressure Fuel Pump ........................................30
Malfunction Indicator Lamp (MIL) ............................30
Manifold Absolute Pressure Sensor ........................31
Mass Air Flow Sensor (With Intake Air Tempera-
ture Sensor) .............................................................
31
Power Steering Pressure (PSP) Sensor ..................31
Refrigerant Pressure Sensor ............................... ....32
VVEL Actuator Motor ...............................................32
VVEL Actuator Motor Relay .....................................32
VVEL Control Module ..............................................32
VVEL Control Shaft Position Sensor .......................32
STRUCTURE AND OPERATION .....................33
Positive Crankcase Ventilation ................................33
On Board Refueling Vapor Recovery (ORVR) ........34
SYSTEM ............................................................35
ENGINE CONTROL SYSTEM ........................ ...........35
ENGINE CONTROL SYSTEM : System Diagram ....35
ENGINE CONTROL SYSTEM : System Descrip-
tion ...........................................................................
35
DIRECT INJECTION GASOLINE SYSTEM .......... ....36
DIRECT INJECTION GASOLINE SYSTEM :
System Diagram .....................................................
36
Revision: 2010 May2011 QX56

EC-4
Component Inspection (Engine Coolant Tempera-
ture Sensor) ...........................................................
216
P0117, P0118 ECT SENSOR ..........................217
DTC Logic ............................................................ ..217
Diagnosis Procedure .............................................217
Component Inspection (Engine Coolant Tempera-
ture Sensor) ...........................................................
218
P0122, P0123 TP SENSOR .............................219
DTC Logic ............................................................ ..219
Diagnosis Procedure .............................................219
Component Inspection (Throttle Position Sensor) ..220
P0125 ECT SENSOR .......................................222
DTC Logic ............................................................ ..222
Diagnosis Procedure .............................................222
Component Inspection (Engine Coolant Tempera-
ture Sensor) ...........................................................
223
P0127 IAT SENSOR ........................................224
DTC Logic ............................................................ ..224
Diagnosis Procedure .............................................224
Component Inspection (Intake Air Temperature
Sensor) ..................................................................
225
P0128 THERMOSTAT FUNCTION .................226
DTC Logic ............................................................ ..226
Diagnosis Procedure .............................................227
Component Inspection (Engine Coolant Tempera-
ture Sensor) ...........................................................
227
P0130, P0150 A/F SENSOR 1 .........................228
DTC Logic ............................................................ ..228
Component Function Check ..................................229
Diagnosis Procedure .............................................230
P0131, P0151 A/F SENSOR 1 .........................232
DTC Logic ............................................................ ..232
Diagnosis Procedure .............................................233
P0132, P0152 A/F SENSOR 1 .........................235
DTC Logic ............................................................ ..235
Diagnosis Procedure .............................................236
P0133, P0153 A/F SENSOR 1 .........................238
DTC Logic ............................................................ ..238
Diagnosis Procedure .............................................239
P0137, P0157 HO2S2 ......................................243
DTC Logic ............................................................ ..243
Component Function Check ..................................244
Diagnosis Procedure .............................................245
Component Inspection (HO2 sensor 2) .................246
P0138, P0158 HO2S2 ......................................249
DTC Logic ............................................................ ..249
Component Function Check ..................................251
Diagnosis Procedure .............................................251
Component Inspection (HO2 sensor 2) .................254
P0139, P0159 HO2S2 .......................................257
DTC Logic ............................................................ .257
Component Function Check .................................258
Diagnosis Procedure .............................................259
Component Inspection (HO2 sensor 2) ................260
P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION ........................................................
263
DTC Logic ............................................................ .263
Diagnosis Procedure .............................................264
P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION ........................................................
267
DTC Logic ............................................................ .267
Diagnosis Procedure .............................................268
P0181 FTT SENSOR ........................................271
DTC Logic ............................................................ .271
Diagnosis Procedure .............................................271
Component Inspection (Fuel Tank Temperature
Sensor) .................................................................
273
P0182, P0183 FTT SENSOR ............................274
DTC Logic ............................................................ .274
Diagnosis Procedure .............................................274
Component Inspection (Fuel Tank Temperature
Sensor) .................................................................
275
P0190, P0192, P0193 FRP SENSOR ...............276
DTC Logic ............................................................ .276
Diagnosis Procedure .............................................276
Component Inspection (Fuel Rail Pressure Sen-
sor) ........................................................................
278
P0191 FRP SENSOR .......................................279
DTC Logic ............................................................ .279
Diagnosis Procedure .............................................279
Component Inspection (Fuel Rail Pressure Sen-
sor) ........................................................................
281
P0196 EOT SENSOR .......................................283
DTC Logic ............................................................ .283
Diagnosis Procedure .............................................284
Component Inspection (Engine Oil Temperature
Sensor) .................................................................
284
P0197, P0198 EOT SENSOR ...........................285
DTC Logic ............................................................ .285
Diagnosis Procedure .............................................285
Component Inspection (Engine Oil Temperature
Sensor) .................................................................
286
P0201, P0202, P0203, P0204, P0205, P0206,
P0207, P0208 INJECTOR ................................
287
DTC Logic ............................................................ .287
Diagnosis Procedure .............................................287
P0222, P0223 TP SENSOR ..............................288
DTC Logic ............................................................ .288
Diagnosis Procedure .............................................288
Component Inspection (Throttle Position Sensor) .289
Revision: 2010 May2011 QX56

EC-5
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P0300, P0301, P0302, P0303, P0304, P0305,
P0306, P0307, P0308 MISFIRE ..................... ..
291
DTC Logic ........................................................... ..291
Diagnosis Procedure .............................................292
P0327, P0328, P0332, P0333 KS ....................297
DTC Logic ........................................................... ..297
Diagnosis Procedure .............................................297
Component Inspection (Knock Sensor) ................298
P0335 CKP SENSOR .......................................299
DTC Logic ........................................................... ..299
Diagnosis Procedure .............................................299
Component Inspection (Crankshaft Position Sen-
sor) ........................................................................
301
P0340, P0345 CMP SENSOR ..........................303
DTC Logic ........................................................... ..303
Diagnosis Procedure .............................................304
Component Inspection (Camshaft Position Sen-
sor) ........................................................................
306
P0420, P0430 THREE WAY CATALYST
FUNCTION .......................................................
307
DTC Logic ........................................................... ..307
Component Function Check ..................................308
Diagnosis Procedure .............................................309
P0441 EVAP CONTROL SYSTEM ..................312
DTC Logic ........................................................... ..312
Component Function Check ..................................313
Diagnosis Procedure .............................................314
P0443 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE .......................
317
DTC Logic ........................................................... ..317
Diagnosis Procedure .............................................318
Component Inspection (EVAP Canister Purge
Volume Control Solenoid Valve) ...........................
320
P0444, P0445 EVAP CANISTER PURGE
VOLUME CONTROL SOLENOID VALVE .......
322
DTC Logic ........................................................... ..322
Diagnosis Procedure .............................................322
Component Inspection (EVAP Canister Purge
Volume Control Solenoid Valve) ...........................
323
P0447 EVAP CANISTER VENT CONTROL
VALVE ..............................................................
325
DTC Logic ........................................................... ..325
Diagnosis Procedure .............................................325
Component Inspection (EVAP Canister Vent Con-
trol Valve) ............................................................ ..
327
P0448 EVAP CANISTER VENT CONTROL
VALVE ..............................................................
329
DTC Logic ........................................................... ..329
Diagnosis Procedure .............................................329
Component Inspection (EVAP Canister Vent Con-
trol Valve) ............................................................ ..
331
P0451 EVAP CONTROL SYSTEM PRES-
SURE SENSOR ...............................................
333
DTC Logic ............................................................ ..333
Diagnosis Procedure .............................................333
Component Inspection (EVAP Control System
Pressure Sensor) ................................................. ..
335
P0452 EVAP CONTROL SYSTEM PRES-
SURE SENSOR ...............................................
336
DTC Logic ..............................................................336
Diagnosis Procedure .............................................337
Component Inspection (EVAP Control System
Pressure Sensor) ................................................. ..
339
P0453 EVAP CONTROL SYSTEM PRES-
SURE SENSOR ...............................................
341
DTC Logic ..............................................................341
Diagnosis Procedure .............................................342
Component Inspection (EVAP Control System
Pressure Sensor) ................................................. ..
345
P0456 EVAP CONTROL SYSTEM .................346
DTC Logic ..............................................................346
Diagnosis Procedure .............................................347
Component Inspection (Fuel Filler Cap) ................350
P0460 FUEL LEVEL SENSOR .......................352
DTC Logic ............................................................ ..352
Diagnosis Procedure .............................................352
P0461 FUEL LEVEL SENSOR .......................353
DTC Logic ..............................................................353
Component Function Check ..................................353
Diagnosis Procedure .............................................354
P0462, P0463 FUEL LEVEL SENSOR ...........355
DTC Logic ..............................................................355
Diagnosis Procedure .............................................355
P0500 VSS ......................................................356
Description ........................................................... ..356
DTC Logic ..............................................................356
Component Function Check ..................................357
Diagnosis Procedure .............................................357
P0506 ISC SYSTEM ........................................358
Description .............................................................358
DTC Logic ..............................................................358
Diagnosis Procedure .............................................358
P0507 ISC SYSTEM ........................................360
Description .............................................................360
DTC Logic ..............................................................360
Diagnosis Procedure .............................................360
P050E COLD START CONTROL ...................362
Description .............................................................362
DTC Logic ..............................................................362
Diagnosis Procedure .............................................362
P0524 ENGINE OIL PRESSURE ....................364
Revision: 2010 May2011 QX56

EC-8
P2A00, P2A03 A/F SENSOR 1 .......................487
DTC Logic ............................................................ ..487
Diagnosis Procedure .............................................487
ASCD BRAKE SWITCH ................................. .490
Component Function Check ................................ ..490
Diagnosis Procedure .............................................490
Component Inspection (ASCD Brake Switch) .......491
ASCD INDICATOR ..........................................492
Component Function Check ................................ ..492
Diagnosis Procedure .............................................492
ELECTRICAL LOAD SIGNAL .........................493
Description ........................................................... ..493
Component Function Check ..................................493
Diagnosis Procedure .............................................493
ELECTRICALLY-CONTROLLED COOLING
FAN COUPLING ..............................................
495
Component Function Check ................................ ..495
Diagnosis Procedure .............................................495
FUEL INJECTOR .............................................498
Component Function Check ................................ ..498
Diagnosis Procedure .............................................498
Component Inspection ...........................................499
HIGH PRESSURE FUEL PUMP ......................501
Component Function Check ................................ ..501
Diagnosis Procedure .............................................501
Component Inspection ...........................................502
ICC BRAKE SWITCH ......................................503
Component Function Check ................................ ..503
Diagnosis Procedure .............................................503
Component Inspection (ICC Brake Switch) ...........505
IGNITION SIGNAL ...........................................506
Component Function Check ................................ ..506
Diagnosis Procedure .............................................506
Component Inspection (Ignition Coil with Power
Transistor) .............................................................
509
Component Inspection (Condenser) ......................510
INFORMATION DISPLAY (ASCD) ..................511
Component Function Check ................................ ..511
Diagnosis Procedure .............................................511
LOW PRESSURE FUEL PUMP ......................512
Component Function Check ................................ ..512
Diagnosis Procedure .............................................512
Component Inspection (Low Pressure Fuel Pump)
..
513
Component Inspection (FPCM) .............................514
MALFUNCTION INDICATOR LAMP ...............515
Component Function Check ................................ ..515
Diagnosis Procedure .............................................515
ON BOARD REFUELING VAPOR RECOV-
ERY (ORVR) .....................................................
516
Component Function Check ................................ .516
Diagnosis Procedure .............................................516
Component Inspection (EVAP Vapor Cut Valve) . .518
REFRIGERANT PRESSURE SENSOR ......... ..520
Component Function Check ................................ .520
Diagnosis Procedure .............................................520
SNOW MODE SWITCH ....................................522
Description ........................................................... .522
Component Function Check .................................522
Diagnosis Procedure .............................................522
Component Inspection ..........................................523
SYMPTOM DIAGNOSIS ...........................524
ENGINE CONTROL SYSTEM SYMPTOMS .. ..524
Symptom Table .................................................... .524
NORMAL OPERATING CONDITION ...............529
Description ........................................................... .529
PERIODIC MAINTENANCE ......................530
IDLE SPEED .......................... ...........................530
Inspection ............................................................. .530
IGNITION TIMING .............................................531
Inspection ............................................................. .531
EVAP LEAK CHECK ........................................532
Inspection ............................................................. .532
POSITIVE CRANKCASE VENTILATION .........534
Inspection ............................................................. .534
REMOVAL AND INSTALLATION .............535
ECM ................................................................ ..535
Removal and Installation ...................................... .535
VVEL CONTROL MODULE .............................536
Removal and Installation ...................................... .536
FUEL PUMP CONTROL MODULE (FPCM) ....537
Removal and Installation ...................................... .537
SERVICE DATA AND SPECIFICATIONS
(SDS) ........ .................................................
538
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ..
538
Idle Speed ............................................................ .538
Ignition Timing .......................................................538
Calculated Load Value ..........................................538
Mass Air Flow Sensor ...........................................538
Revision: 2010 May2011 QX56