warning INFINITI QX56 2008 Factory Service Manual

CAMSHAFTEM-55
< ON-VEHICLE REPAIR >
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a. Squeeze return-proof clip ends using suitable tool and push the
plunger into the tensioner body.
b. Secure plunger using stopper pin. • Stopper pin is made from hard wire approximately 1 mm (0.04in) in diameter.
c. Remove the bolts and the timing chain tensioner.
NOTE:
• Stop plunger in the fully extended position using return-proof clip (1) if stopper pin is removed.
• Push the plunger (2) into the tensioner body while squeezing the return-proof clip (1). Secure it using stopper pin (3).
6. Remove the RH bank timing chain tensioner cover from the front cover using Tool.
CAUTION:
Do not damage mating surfaces.
7. Remove the RH bank timing chain tensioner using the following steps. WARNING:
Plunger, spring, and spring seat pop out when squeezing return -proof clip without holding
plunger head. It may cause serious injuries. Always hold plunger head when removing.
a. Squeeze return-proof clip ends using suitable tool and push the plunger into the tensioner body.
b. Secure plunger using stopper pin. • Stopper pin is made from hard wire approximately 1 mm (0.04in) in diameter.
KBIA2479E
KBIA2483E
Tool number : KV10111100 (J-37228)
KBIA2521E
KBIA2479E
Revision: March 2010 2008 QX56

CAMSHAFTEM-63
< ON-VEHICLE REPAIR >
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1. Check engine oil level. Refer to
LU-8, "Inspection".
2. Perform the following procedure so as to prevent the engine from being unintentionally started while checking.
a. Release fuel pressure. Refer to EC-494, "
Fuel Pressure Check".
b. Disconnect ignition coil and injector harness connectors if practical.
3. Remove IVT control solenoid valve.
4. Crank engine, and then make sure that engine oil comes out from IVT control cover oil hole. End cranking after checking.
WARNING:
Be careful not to touch rotating parts (drive be lts, idler pulley, and crankshaft pulley, etc.).
CAUTION:
• Engine oil may squirt from IVT control solenoid valve installation hole during cranking. Use a
shop cloth to prevent engine oil from splash ing on worker, engine components and vehicle.
• Do not allow engine oil to get on rubber components such as drive belts or engine mount insula- tors. Immediately wipe off any splashed engine oil.
5. Clean oil groove between oil strainer and IVT control solenoid valve if engine oil does not come out from IVT control valve cover oil hole. Refer to LU-7, "
Schematic".
6. Remove components between IVT control solenoid valve and camshaft sprocket (INT), and then check each oil groove for clogging.
• Clean oil groove if necessary.
7. After inspection, installation of the remaining components is in the reverse order of removal.
Revision: March 2010 2008 QX56

EM-78
< REMOVAL AND INSTALLATION >
ENGINE ASSEMBLY
REMOVAL AND INSTALLATION
ENGINE ASSEMBLY
Removal and InstallationINFOID:0000000001538831
WARNING:
• Situate vehicle on a flat and solid surface.
• Place chocks at front and back of rear wheels.
• For engines not equipped with engine slingers, attach proper slingers and bolts described in PARTS
CATALOG.
CAUTION:
• Always be careful to work safely, avoid forceful or uninstructed operations.
• Do not start working until exh aust system and engine coolant are cooled sufficiently.
• If items or work required are no t covered by the engine section, follow the applicable procedures.
• Always use the support poin t specified for lifting.
• Use either 2-point lift type or separate type lift. If board-on type is used for unavoidable reasons,
support at the rear axle jacking point with transmission jack or similar tool before starting work, in
preparation for the backward shift of center of gravity.
• For supporting points for lifting and jacking point at rear axle, refer to GI-30, "
Garage Jack and
Safety Stand".
REMOVAL
Preparation
1. Drain the engine coolant. Refer to CO-11, "Changing Engine Coolant".
2. Partially drain the A/T fluid. Refer to TM-180, "
Changing the A/T Fluid (ATF)".
3. Release the fuel pressure. Refer to EC-494, "
Fuel Pressure Check".
1. Rear engine mounting insulator 4WD 2. Rear engine mounting insulator 2WD 3. LH engine mounting bracket
4. LH heat shield plate 5. LH engine mounting insulator 6. RH engine mounting bracket
7. RH heat shield plate 8. RH engine mounting insulator
LBIA0397E
Revision: March 2010 2008 QX56

EX-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000004857579
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precaution Necessary for Steering W heel Rotation After Battery Disconnect
INFOID:0000000004857585
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecting both battery cables with the ignition knob in the
″LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS, an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery pow er is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be rotated.
4. Perform the necessary repair operation.
Revision: March 2010 2008 QX56

EXL-1
DRIVER CONTROLS
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SECTION EXL
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CONTENTS
EXTERIOR LIGHTING SYSTEM
BASIC INSPECTION ....... .............................4
DIAGNOSIS AND REPAIR WORKFLOW ..... .....4
Work Flow ........................................................... ......4
FUNCTION DIAGNOSIS ...............................7
HEADLAMP .................................................... .....7
System Diagram .................................................. ......7
System Description ...................................................7
Component Parts Location ........................................7
Component Description .............................................7
DAYTIME LIGHT SYSTEM .................................9
System Diagram .................................................. ......9
System Description ...................................................9
Component Parts Location ........................................9
Component Description ...........................................10
AUTO LIGHT SYSTEM ......................................11
System Diagram ......................................................11
System Description .................................................11
Component Parts Location ......................................12
Component Description ...........................................12
HEADLAMP AIMING SYSTEM (MANUAL) .......14
System Diagram .................................................. ....14
System Description .................................................14
Component Description ...........................................14
FRONT FOG LAMP ............................................15
System Diagram .................................................. ....15
System Description .................................................15
Component Parts Location ......................................15
Component Description ...........................................15
TURN SIGNAL AND HAZARD WARNING
LAMPS ...............................................................
16
System Diagram .................................................. ....16
System Description .................................................16
Component Parts Location ......................................17
Component Description ...........................................17
PARKING, LICENSE PLATE AND TAIL
LAMPS ..............................................................
18
System Diagram .................................................. ....18
System Description ..................................................18
Component Parts Location ......................................18
Component Description ...........................................19
TRAILER TOW ..................................................20
System Diagram ......................................................20
System Description ..................................................20
Component Parts Location ......................................21
Component Description ...........................................21
DIAGNOSIS SYSTEM (BCM) ...........................23
COMMON ITEM ..................................................... ....23
COMMON ITEM : Diagnosis Description ................23
COMMON ITEM : CONSULT-III Function ...............23
EXTERNAL LAMP ................................................. ....23
EXTERNAL LAMP : CONSULT-III Function ............23
FLASHER ............................................................... ....25
FLASHER : CONSULT-III Function (BCM -
FLASHER) ...............................................................
25
DIAGNOSIS SYSTEM (IPDM E/R) ...................26
CONSULT - III Function (IPDM E/R) .......................26
COMPONENT DIAGNOSIS .........................27
POWER SUPPLY AND GROUND CIRCUIT ....27
BCM (BODY CONTROL MODULE) ...................... ....27
BCM (BODY CONTROL MODULE) : Diagnosis
Procedure ............................................................ ....
27
IPDM E/R (INTELLIGENT POWER DISTRIBU-
TION MODULE ENGINE ROOM) .......................... ....
27
IPDM E/R (INTELLIGENT POWER DISTRIBU-
TION MODULE ENGINE ROOM) : Diagnosis Pro-
cedure .................................................................. ....
27
Revision: March 2010 2008 QX56

EXL-2
HEADLAMP (HI) CIRCUIT ................................28
Description ........................................................... ...28
Component Function Check ...................................28
Diagnosis Procedure ..............................................28
HEADLAMP (LO) CIRCUIT ...............................30
Description ........................................................... ...30
Component Function Check ...................................30
Diagnosis Procedure ..............................................30
FRONT FOG LAMP CIRCUIT ...........................32
Description ........................................................... ...32
Component Function Check ...................................32
Diagnosis Procedure ..............................................32
PARKING LAMP CIRCUIT ................................34
Description ........................................................... ...34
Component Function Check ...................................34
Diagnosis Procedure ..............................................34
TURN SIGNAL LAMP CIRCUIT ........................37
Description ........................................................... ...37
Component Function Check ...................................37
Diagnosis Procedure ..............................................37
OPTICAL SENSOR ...........................................40
Description ..............................................................40
Component Function Check ...................................40
Diagnosis Procedure ..............................................40
HEADLAMP AIMING SWITCH ..........................42
Description ........................................................... ...42
Diagnosis Procedure ..............................................42
HEADLAMP .......................................................43
Wiring Diagram .................................................... ...43
DAYTIME LIGHT SYSTEM ................................47
Wiring Diagram .................................................... ...47
AUTO LIGHT SYSTEM ......................................54
Wiring Diagram .................................................... ...54
HEADLAMP AIMING SYSTEM (MANUAL) ......61
Wiring Diagram .................................................... ...61
FRONT FOG LAMP SYSTEM ...........................65
Wiring Diagram .................................................... ...65
TURN SIGNAL AND HAZARD WARNING
LAMP SYSTEM .............................................. ...
68
Wiring Diagram .................................................... ...68
PARKING, LICENSE PLATE AND TAIL
LAMPS SYSTEM ............................................ ...
75
Wiring Diagram .................................................... ...75
STOP LAMP ......................................................81
Wiring Diagram .................................................... ...81
BACK-UP LAMP ................................................85
Wiring Diagram .................................................... ...85
TRAILER TOW ..................................................90
Wiring Diagram .................................................... ...90
ECU DIAGNOSIS .......................................99
BCM (BODY CONTROL MODULE) ............... ...99
Description ........................................................... ...99
IPDM E/R (INTELLIGENT POWER DISTRI-
BUTION MODULE ENGINE ROOM) ................
100
Description ........................................................... .100
SYMPTOM DIAGNOSIS ...........................101
EXTERIOR LIGHTING SYSTEM SYMPTOMS ..101
Symptom Table .................................................... .101
NORMAL OPERATING CONDITION ...............103
Description ........................................................... .103
BOTH SIDE HEADLAMPS DO NOT SWITCH
TO HIGH BEAM ................................................
104
Description ........................................................... .104
Diagnosis Procedure .............................................104
BOTH SIDE HEADLAMPS (LO) ARE NOT
TURNED ON .....................................................
105
Description ............................................................105
Diagnosis Procedure .............................................105
PARKING, LICENSE PLATE AND TAIL
LAMPS ARE NOT TURNED ON ......................
106
Description ........................................................... .106
Diagnosis Procedure .............................................106
BOTH SIDE FRONT FOG LAMPS ARE NOT
TURNED ON .....................................................
107
Description ............................................................107
Diagnosis Procedure .............................................107
PRECAUTION ...........................................108
PRECAUTIONS .............................................. ..108
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
108
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ................................
108
ON-VEHICLE REPAIR ..............................110
ADJUSTMENT AND INSPECTION ................ ..110
HEADLAMP ............................................................ .110
HEADLAMP : Aiming Adjustment .........................110
FRONT FOG LAMP ................................................ .111
FRONT FOG LAMP : Aiming Adjustment .............111
REMOVAL AND INSTALLATION .............113
HEADLAMP .................................................... ..113
Revision: March 2010 2008 QX56

EXL-16
< FUNCTION DIAGNOSIS >
TURN SIGNAL AND HAZARD WARNING LAMPS
TURN SIGNAL AND HAZARD WARNING LAMPS
System DiagramINFOID:0000000001547110
System DescriptionINFOID:0000000001547111
TURN SIGNAL OPERATION
When the turn signal switch is in LH or RH position with the ignition switch in ON position, the BCM detects the
TURN RH or TURN LH ON request. The BCM outputs the flasher signal to the respective turn signal lamp.
The BCM also sends a turn indicator signal ON reques t via the CAN communication lines to the combination
meter. The combination meter then activates the appropriate turn signal indicator and audible buzzer.
HAZARD LAMP OPERATION
When the hazard switch is in ON position, the BCM det ects the hazard switch signal ON. The BCM outputs the
flasher signal (right and left). The BCM sends a hazar d indicator signal ON request via the CAN communica-
tion lines to the combination meter. The combination meter then activates the hazard indicator and audible
buzzer.
REMOTE KEYLESS ENTRY OPERATION
The remote keyless entry receiver transmits a hazar d request signal to the BCM, then BCM controls hazard
lamps.
Refer to SEC-9, "
System Description".
COMBINATION SWITCH READING FUNCTION
Refer to BCS-7, "System Description".
AWLIA0006GB
Revision: March 2010 2008 QX56

TURN SIGNAL AND HAZARD WARNING LAMPSEXL-17
< FUNCTION DIAGNOSIS >
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Component Parts LocationINFOID:0000000001547112
Component DescriptionINFOID:0000000001547113
1. Combination meter M24 2. Combination switch M283. Hazard switch M55
4. BCM M18, M20 (view with instrument panel removed)
ALLIA0384ZZ
Part name Description
BCM Controls turn signal and hazard flasher operation.
Combination switch Lighting and turn signal switch requests are output to the BCM.
Hazard switch Hazard flasher request signal is output to the BCM.
Combination meter Outputs turn and hazard indicator as requested by the BCM.
Revision: March 2010 2008 QX56

DIAGNOSIS SYSTEM (BCM)EXL-25
< FUNCTION DIAGNOSIS >
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1: The item is indicated, not monitored.
FLASHER
FLASHER : CONSULT-III Function (BCM - FLASHER)INFOID:0000000001547121
DATA MONITOR
ACTIVE TEST
FR FOG LAMP ON
Transmits the front fog lamp light request signal to IPDM E/R via CAN
communication to turn the front fog lamp ON.
OFF Stops the front fog lamp request signal transmission.
CORNERING LAMP
1
RH —
LH
OFF
CARGO LAMP ON
Tramsmits the cargo lamp request signal to the IPDM E/R via CAN com-
munication to turn on the cargo lamp.
OFF Stops the cargo lamp request signal transmission.
Test item
Operation Description
Monitor item
[Unit] Description
IGN ON SW
[ON/OFF] The switch status input from the ignition switch
HAZARD SW
[ON/OFF] The switch status input from the hazard warning switch
TURN SIGNAL R
[ON/OFF] Each switch condition that BCM judges from the combination switch reading function
TURN SIGNAL L
[ON/OFF]
BRAKE SW
[ON/OFF] The switch status input from the brake switch
Test item
Operation Description
FLASHER RH Blinks right turn signal lamp.
LH Blinks left turn signal lamp.
OFF Turns turn signal lamps (right and left) OFF.
Revision: March 2010 2008 QX56

TURN SIGNAL LAMP CIRCUITEXL-37
< COMPONENT DIAGNOSIS >
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TURN SIGNAL LAMP CIRCUIT
DescriptionINFOID:0000000001547137
The BCM monitors inputs from the combination switch to determine when to activate the turn signals. The
BCM outputs voltage direction to the left and right turn signals during turn signal operation or both during haz-
ard warning operation. The BCM sends a turn signal i ndicator request to the combination meter via the CAN
communication lines.
The BCM performs the fast flasher operation (fail-safe) if any bulb or harness of the turn signal lamp circuit is
open.
NOTE:
Turn signal lamp blinks at normal speed when using the hazard warning lamp.
Component Function CheckINFOID:0000000001547138
1.CHECK TURN SIGNAL LAMP
CONSULT-III
1. Select "FLASHER" of BCM (F LASHER) active test item.
2. With operating the test items, chec k that the turn signal lamp blinks.
Does the turn signal lamp blink?
YES >> Turn signal lamp circuit is normal.
NO >> Refer to EXL-37, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001547139
1.CHECK TURN SIGNAL LAMP BULB
Check the applicable lamp bulb to be sure the proper bulb standard is in use and the bulb is not open.
Is the bulb OK?
YES >> GO TO 2
NO >> Replace the bulb.
2.CHECK TURN SIGNAL LA MP OUTPUT VOLTAGE
1. Turn the ignition switch OFF.
2. Disconnect the front turn/fog lamp connector or the rear combi- nation lamp connector.
3. Turn the ignition switch ON.
4. With turn signal switch operating, check the voltage between the BCM harness connector M20 and ground.
Is voltage reading as specified?
YES >> GO TO 3
NO >> Replace BCM. Refer to BCS-55, "
Removal and Installation".
LH : Turn signal lamp LH blinking
RH : Turn signal lamp RH blinking
OFF : The turn signal lamp OFF
(+)
(−)V olt a g e
Connector Terminal
M20 LH 60
Ground
RH 61
ALLIA0402ZZ
PKID0926E
Revision: March 2010 2008 QX56