maintenance INFINITI QX56 2011 Factory Owner's Guide

RADIATORCO-11
< PERIODIC MAINTENANCE >
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RADIATOR
RESERVOIR TANK CAP
RESERVOIR TANK CAP : InspectionINFOID:0000000006289661
 Check valve seat of reservoir tank cap.
- Check if valve seat (A) is swollen to the extent that the edge of the
metal plunger (B) cannot be seen when watching it vertically from
the top.
- Check if valve seat has no soil and damage.
 Pull negative-pressure valve to open it, and check that it close completely when released.
- Check that there is no dirt or dam age on the valve seat of reservoir
tank cap negative-pressure valve.
- Check that there are no unusualness in the opening and closing conditions of negative-pressure valve.
 Check reservoir tank cap relief pressure.
- When connecting reservoir tank cap to the radiator cap tester (commercial service tool) and the r adiator cap tester adapter (com-
mercial service tool) (A), apply engine coolant to the cap seal sur-
face.
 Replace reservoir tank cap if there is an unusualness related to the above three.
CAUTION:
When installing reservoir tank cap , thoroughly wipe out the water inlet filler neck to remove any waxy
residue or foreign material.
RADIATOR
RADIATOR : InspectionINFOID:0000000006289662
Check radiator for mud or clogging. If neces sary, clean radiator as per the following:
 Be careful not to bend or damage radiator fins.
 When radiator is cleaned without removal, remove all surrounding parts such as radiator cooling fan shroud. Then tape harness and connectors to prevent water from entering.
1. Apply water by hose to the back side of the radiator core vertically downward.
2. Apply water again to all radiator core surfaces once per minute.
JPBIA0108ZZ
SMA967B
Standard and limit : Refer to CO-23, "Radiator".
JPBIA0109ZZ
Revision: 2010 May2011 QX56

CO-12
< PERIODIC MAINTENANCE >
RADIATOR
3. Stop washing if any stains no longer flow out from radiator.
4. Blow air into the back side of radiator core vertically downward. Use compressed air lower than 490 kPa (4.9 bar, 5 kg/cm
2, 71 psi) and keep distance more than 30 cm
(11.8 in).
5. Blow air again into all the radiator core su rfaces once per minute until no water sprays out.
Revision: 2010 May2011 QX56

SERVICE DATA AND SPECIFICATIONS (SDS)
CO-23
< SERVICE DATA AND SPECIFICATIONS (SDS)
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Periodical Maintenance SpecificationINFOID:0000000006289675
ENGINE COOLANT CAPACITY (APPROXIMATELY)
Unit: (US qt, Imp qt)
RadiatorINFOID:0000000006289676
Unit: kPa (kg/cm2, psi)
ThermostatINFOID:0000000006289677
Engine coolant capacity [With reservoir tank (“MAX” level)] 14.9 (15-6/8, 13-1/8)
Reservoir tank engine coolant capacity (At “MAX” level) 1.0 (1, 7/8)
Reservoir tank cap relief pressure
Standard 108.2 - 127.8 ( 1.1 - 1.3, 15.7 - 18.5)
Limit 98 (1.0, 14)
Leakage testing pressure 186 (1.9, 27)
ThermostatStandard
Valve opening temperature 82 °C (180 °F)
Maximum valve lift 10.0 mm/95 °C (0.394 in/203 °F)
Valve closing temperature 77 °C (171 °F)
Revision: 2010 May2011 QX56

DAS-64
< PRECAUTION >[DCA]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006223495
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 severi ty 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 “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
 To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/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 “SRS AIR BAG”.
 Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied 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 Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric 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.
Precautions For Harness RepairINFOID:0000000006223496
ITS communication uses a twisted pair line. Be careful when repairing it.
 Solder the repaired area and wrap tape around the soldered area.
NOTE:
A fray of twisted lines must be within 110 mm (4.33 in).
SKIB8766E
Revision: 2010 May2011 QX56

DAS-272
< PRECAUTION >[LDW & LDP]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006223697
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 severi ty 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 “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
 To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/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 “SRS AIR BAG”.
 Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied 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 Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric 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.
Precautions For Harness RepairINFOID:0000000006223698
ITS communication uses a twisted pair line. Be careful when repairing it.
 Solder the repaired area and wrap tape around the soldered area.
NOTE:
A fray of twisted lines must be within 110 mm (4.33 in).
SKIB8766E
Revision: 2010 May2011 QX56

DAS
PRECAUTIONSDAS-407
< PRECAUTION > [BSW]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006223847
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 severi ty 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 whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
 To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision that would result in air ba g 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 unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied 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 Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, DO NOT use air or electric 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 minutes before performing any service.
Precaution for BSW System ServiceINFOID:0000000006223848
WARNING:
Be careful of traffic conditions and safety aro und the vehicle when performing road test.
CAUTION:
 Never perform the active test while driving.
 Never change BSW initial state ON ⇒ OFF without the consent of the customer.
TO KEEP THE BSW SYSTEM OPERATING PROPERLY, BE SURE TO OBSERVE THE FOLLOW-
ING ITEMS:
System Maintenance
The two side radar for the BSW system are located near the rear bumper.
 Always keep the area near the side radar clean.
 Do not attach stickers (including transparent material ), install accessories or apply additional paint near the
side radar.
 Do not strike or damage the area around the side radar.
Revision: 2010 May2011 QX56

PRECAUTIONSDEF-3
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006349779
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 severi ty 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 whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision that would result in air ba g 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 unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied 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 Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the
ignition ON or engine running, DO NOT use air or electric 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 minutes before performing any service.
Precaution Necessary for Steering Wh eel Rotation after Battery Disconnect
INFOID:0000000006299422
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect both battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
This vehicle is equipped with a push-button ignition switch and a steering lock unit.
If the battery is disconnect ed or discharged, the steering wheel will lock and cannot be turned.
If turning the steering wheel is required with the battery disconnected or discharged, 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. Turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock wil l remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
Revision: 2010 May2011 QX56

DLK-8
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006225828
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 severi ty 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 “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/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 “SRS AIR BAG”.
 Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied 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 Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric 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:0000000006225829
NOTE:
 Before removing and installing any control units, first tu rn the push-button ignition switch to the LOCK posi-
tion, then disconnect bot h battery cables.
 After finishing work, confirm that all control unit connectors are connected properly, then re-connect both
battery cables.
 Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If a DTC is detected, perform trouble diagnos is according to self-diagnosis results.
For vehicle with steering lock unit, if the battery is disconnected or discharged, the steering wheel will lock and
cannot be turned.
If turning the steering wheel is required with the bat tery disconnected or discharged, follow the operation pro-
cedure below before starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Turn the push-button ignition switch to ACC position. (At this time, the steering lock will be released.)
3. Disconnect both battery cables. The steering lock wi ll remain released with both battery cables discon-
nected and the steering wheel can be turned.
4. Perform the necessary repair operation.
Revision: 2010 May2011 QX56

DLN-3
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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-4
Commercial Service Tools .....................................125
SYMPTOM DIAGNOSIS ............................126
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
126
NVH Troubleshooting Chart ................................ ..126
PERIODIC MAINTENANCE ..................... ..127
FRONT PROPELLER SHAFT ........................ .127
Inspection ............................................................ ..127
REMOVAL AND INSTALLATION ..............128
FRONT PROPELLER SHAFT ........................ .128
Exploded View ..................................................... ..128
Removal and Installation .......................................129
Disassembly and Assembly ...................................129
Inspection ..............................................................131
SERVICE DATA AND SPECIFICATIONS
(SDS) .............. ............................................
133
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... .
133
General Specification .......................................... ..133
Propeller Shaft Runout ..........................................133
Journal Axial Play ..................................................133
REAR PROPELLER SHAFT: 2F P26
SYMPTOM DIAGNOSIS .. ..........................
134
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
134
NVH Troubleshooting Chart ................................ ..134
PERIODIC MAINTENANCE ..................... ..135
REAR PROPELLER SHAFT .......................... .135
Inspection ............................................................ ..135
REMOVAL AND INSTALLATION ..............136
REAR PROPELLER SHAFT .......................... .136
Exploded View ..................................................... ..136
Removal and Installation .......................................137
Disassembly and Assembly ...................................137
Inspection ..............................................................139
SERVICE DATA AND SPECIFICATIONS
(SDS) .............. ............................................
140
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... .
140
General Specification .......................................... ..140
Propeller Shaft Runout ..........................................140
Journal Axial Play ..................................................140
REAR PROPELLER SHAFT: 2S1410
SYMPTOM DIAGNOSIS .. ..........................
141
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... ..
141
NVH Troubleshooting Chart ................................. .141
PERIODIC MAINTENANCE ......................142
REAR PROPELLER SHAFT .......................... ..142
Inspection ............................................................. .142
REMOVAL AND INSTALLATION .............143
REAR PROPELLER SHAFT .......................... ..143
Exploded View ..................................................... .143
Removal and Installation .......................................144
Disassembly and Assembly ..................................144
Inspection ..............................................................146
SERVICE DATA AND SPECIFICATIONS
(SDS) ........ .................................................
147
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ..
147
General Specification ........................................... .147
Propeller Shaft Runout ..........................................147
Journal Axial Play .................................................147
FRONT FINAL DRIVE: R180A
PRECAUTION ............... ............................
148
PRECAUTIONS .............................................. ..148
Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect ................................ .
148
Precaution for Servicing Front Final Drive ............148
PREPARATION .........................................149
PREPARATION .............................................. ..149
Special Service Tool ............................................ .149
Commercial Service Tool ......................................151
SYSTEM DESCRIPTION ..........................153
STRUCTURE AND OPERATION ................... ..153
Sectional View ..................................................... .153
SYMPTOM DIAGNOSIS ...........................154
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... ..
154
NVH Troubleshooting Chart ................................. .154
PERIODIC MAINTENANCE ......................155
FRONT DIFFERENTIAL GEAR OIL .............. ..155
Inspection ............................................................. .155
Draining .................................................................155
Refilling .................................................................155
REMOVAL AND INSTALLATION .............156
FRONT OIL SEAL .......................................... ..156
Exploded View ..................................................... .156
Revision: 2010 May2011 QX56