INFINITI QX56 2011 Factory Service Manual

LAN
CAN COMMUNICATION CIRCUIT 2LAN-231
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
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Non-reproduced>>Start the diagnosis again. Follow
the trouble diagnosis procedure when past error is
detected.
6.CHECK UNIT REPRODUCTION
Perform the reproduction test as per the following procedure for each unit.
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Disconnect one of the unit connectors of CAN communication circuit 2. NOTE:
CAN gateway has two termination circuits. Check other units first.
4. Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results from interview with customer)” are reproduced.
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result
Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.
Revision: 2010 May2011 QX56

LAN-232
< DTC/CIRCUIT DIAGNOSIS >[CAN SYSTEM (TYPE 4)]
ITS COMMUNICATION CIRCUIT
ITS COMMUNICATION CIRCUIT
Diagnosis ProcedureINFOID:0000000006256402
1.CHECK CAN DIAGNOSIS
Check the CAN diagnosis results from CONSULT-III to see that the CAN communication circuit 1 and CAN
communication circuit 2 have no malfunction.
NOTE:
For identification of CAN communication circuit 1, CAN communication circuit 2, and ITS communication cir-
cuit, refer to LAN-57, "
System Diagram".
Are the CAN communication 1 and CAN communication 2 circuits normal?
YES >> GO TO 2.
NO >> Check and repair CAN communication circuit 1 and/or CAN communication circuit 2.
2.CONNECTOR INSPECTION
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors fo r damage, bend and loose connection (unit side and con-
nector side).
- ADAS control unit
- Harness connector B63
- Harness connector B239
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair the terminal and connector.
3.CHECK HARNESS CONTI NUITY (OPEN CIRCUIT)
1. Disconnect the following harness connectors.
- ADAS control unit
- ICC sensor
2. Check the continuity between the ADAS control unit harness connector and the ICC sensor harness con-
nector.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair the ADAS control unit branch line. (ITS communication circuit). Refer to LAN-57, "
System
Diagram".
4.CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
1. Disconnect the following harness connectors.
- Side radar RH
- Side radar LH
- Lane camera unit
- Accelerator pedal actuator
2. Check the continuity between the ADAS control unit harness connector terminals.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Check the harness and repair the root cause.
ADAS control unit harness connector ICC sensor harness connector Continuity
Connector No. Terminal No. Connector No. Terminal No.
B61 7
E65 3 Existed
86Existed
ADAS control unit harness connector Continuity
Connector No. Terminal No.
B61 7 8 Not existed
Revision: 2010 May2011 QX56

LAN
ITS COMMUNICATION CIRCUITLAN-233
< DTC/CIRCUIT DIAGNOSIS > [CAN SYSTEM (TYPE 4)]
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5.CHECK HARNESS CONTINUI
TY (SHORT CIRCUIT)
Check the continuity between the ADAS control unit harness connector and the ground.
Is the inspection result normal?
YES >> GO TO 6.
NO >> Check the harness and repair the root cause.
6.CHECK TERMINATION CIRCUIT
1. Remove the ADAS control unit and the ICC sensor.
2. Check the resistance between t he ADAS control unit terminals.
3. Check the resistance between the ICC sensor terminals.
Is the inspection result normal?
YES >> GO TO 7.
NO >> Replace the ADAS control unit and/or the ICC sensor.
7.CHECK SYMPTOM
Connect all the connectors. Check if the symptoms descr ibed in the “Symptom (Results from interview with
customer)” are reproduced.
Inspection result
Reproduced>>GO TO 8.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is
detected.
8.CHECK UNIT REPRODUCTION
Perform the reproduction test as per the following procedure for each unit.
1. Turn the ignition switch OFF.
2. Disconnect the battery cabl e from the negative terminal.
3. Disconnect one of the unit connectors of ITS communication circuit.
NOTE:
ADAS control unit and ICC sensor have a termi nation circuit. Check other units first.
4. Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results from interview with customer)” are reproduced.
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result
Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.
ADAS control unit harness connector
GroundContinuity
Connector No. Terminal No.
B61 7 Not existed
8 Not existed
ADAS control unit
Resistance (Ω)
Te r m i n a l N o .
7 8 Approx. 108 – 132
ICC sensor Resistance (Ω)
Te r m i n a l N o .
3 6 Approx. 108 – 132
Revision: 2010 May2011 QX56

LU-1
ENGINE
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SECTION LU
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CONTENTS
ENGINE LUBRICATION SYSTEM
PRECAUTION ................ ...............................2
PRECAUTIONS .............................................. .....2
Liquid Gasket ..................................................... ......2
PREPARATION ............................................3
PREPARATION .............................................. .....3
Special Service Tool ........................................... ......3
Commercial Service Tool ..........................................3
SYSTEM DESCRIPTION ..............................5
LUBRICATION SYSTEM ............................... .....5
Engine Lubrication System ................................. ......5
Engine Lubrication System Schematic ......................6
PERIODIC MAINTENANCE ..........................7
ENGINE OIL ................................................... .....7
Inspection ............................................................ ......7
Draining .....................................................................8
Refilling .....................................................................8
OIL FILTER .........................................................9
Removal and Installation ..................................... ......9
Inspection ............................................................ .....9
REMOVAL AND INSTALLATION ...............11
OIL COOLER ....................................................11
Exploded View ..................................................... ....11
Removal and Installation .........................................11
Inspection ................................................................12
OIL PUMP .........................................................13
Exploded View .........................................................13
Removal and Installation .........................................13
Disassembly and Assembly .....................................14
Inspection ................................................................14
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... .............................................
17
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................
17
Periodical Maintenance Specification .................. ....17
Engine Oil Pressure ...............................................17
Oil Pump .................................................................17
Regulator Valve ......................................................17
Revision: 2010 May2011 QX56

LU-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Liquid GasketINFOID:0000000006289611
LIQUID GASKET APPLICATION PROCEDURE
1. Remove old liquid gasket adhering to the liquid gasket application surface and the mating surface.• Remove liquid gasket completely from the liquid gasket application surface, mounting bolts, and boltholes.
2. Wipe the liquid gasket application surface and the ma ting surface with white gasoline (lighting and heating
use) to remove adhering moisture, grease and foreign materials.
3. Apply liquid gasket to the liquid gasket application surface. Use Genuine RTV Silicone Seal ant or equivalent. Refer to GI-22, "
Recommended Chemical Prod-
ucts and Sealants".
 Within five minutes of liquid gasket application, install the mating component.
 If liquid gasket protrudes, wipe it off immediately.
 Do not retighten mounting bolts or nuts after the installation.
 After 30 minutes or more have passed from the installation, fill engine oil and engine coolant.
Revision: 2010 May2011 QX56

PREPARATIONLU-3
< PREPARATION >
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PREPARATION
PREPARATION
Special Service ToolINFOID:0000000006289612
Commercial Service ToolINFOID:0000000006289613
Tool number
(Kent-Moore No.)
Tool name
Description
ST25051001
(J-25695-1)
Oil pressure gauge Measuring oil pressure
Maximum measuring range:
2,452 kPa (25 kg/cm
2, 356 psi)
ST25052000
(J-25695-2)
Hose Adapting oil pressure gauge to cylinder block
K V 1 0 1111 0 0
(J-37228)
Seal cutter Removing steel oil pan and rear timing chain
case
KV10115801
(J-38956)
Oil filter wrench Removing and installing oil filter
a: 64.3 mm (2.531 in)
S-NT050
S-NT559
NT046
S-NT375
Revision: 2010 May2011 QX56

LU-4
< PREPARATION >
PREPARATION
Tool nameDescription
Tube presser Pressing the tube of liquid gasket
Power tool Loosening bolts and nuts
Deep socket Removing and installing oil pressure switch
Deep socket 26 mm
S-NT052
PBIC0190E
NT818
Revision: 2010 May2011 QX56

LUBRICATION SYSTEMLU-5
< SYSTEM DESCRIPTION >
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SYSTEM DESCRIPTION
LUBRICATION SYSTEM
Engine Lubrication SystemINFOID:0000000006289614
JPBIA3511GB
Revision: 2010 May2011 QX56

LU-6
< SYSTEM DESCRIPTION >
LUBRICATION SYSTEM
Engine Lubrication System Schematic
INFOID:0000000006289615
JPBIA3532GB
Revision: 2010 May2011 QX56

ENGINE OILLU-7
< PERIODIC MAINTENANCE >
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PERIODIC MAINTENANCE
ENGINE OIL
InspectionINFOID:0000000006289616
OIL LEVEL
NOTE:
Before starting engine, put vehicle horizontally and check
the engine oil level. If engine is already started, stop
it and allow 10 minutes before checking.
1. Pull out oil level gauge and wipe it clean.
2. Insert oil level gauge and check the engine oil level is within the range (A) shown in the figure.
3. If it is out of range, adjust it.
CAUTION:
Do not overfill the engine with oil.
OIL APPEARANCE
 Check the engine oil for a white milky appearance or excessive contamination.
 If the engine oil is milky, it is highly probable that it is contaminated with engine coolant. Repair or replace
damaged parts.
OIL LEAKAGE
Check for oil leakage around the following areas:
Oil pan
 Oil pan drain plug
 Oil pressure switch
 Oil filter
 Oil cooler
 Intake valve timing control cover
 Intake valve timing control solenoid valve
 Front cover
 Mating surface between cylinder block and cylinder head
 Mating surface between cylinder head and rocker cover
 Crankshaft oil seal (front and rear)
OIL PRESSURE CHECK
WARNING:
• Be careful not to burn yourself, as th e engine and engine oil may be hot.
 Put the A/T shift selector in the Park “P” position.
1. Check the engine oil level.
2. Remove front under cover.
3. Disconnect the oil pressure switch (1) harness connector.
4. Remove the oil pressure switch. CAUTION:
Do not drop or shock oil pressure switch.
JPBIA0070ZZ
:Vehicle front
JPBIA3526ZZ
Revision: 2010 May2011 QX56