sensor INFINITI QX56 2010 Factory Service Manual

SRC-90
< SYMPTOM DIAGNOSIS >
SRS AIR BAG SYSTEM
TION METER
Inspect the harness and connectors between the air bag diagnosis sensor unit and the combination meter.
Do the harness or connectors have any visible damage?
Yes >> Replace harness.
No >> GO TO 4
4.CHECK COMBINATION METER
Disconnect the air bag diagnosis sensor unit harness connectors and turn ignition switch ON.
Does
“AIR BAG” warning lamp turn on?
Yes >> Replace the air bag diagnosis sensor unit. Refer to SR-17, "Removal and Installation".
No >> Replace the combination meter. Refer to MWI-100, "
Removal and Installation".
Revision: April 20092010 QX56

PASSENGER SEAT BELT WARNING SYSTEMSRC-91
< SYMPTOM DIAGNOSIS >
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PASSENGER SEAT BELT WARNING SYSTEM
Seat Belt Warning Syst em Does Not FunctionINFOID:0000000005147851
1.SEAT BELT WARNING LIGHT
Turn ignition switch ON.
Does the seat belt warning lamp come ON?
YES >> GO TO 2
NO >> • Check 10A fuse [No. 14, loca ted in the fuse block (J/B)].
• Check seat belt buckle switch LH.
• Check harness between combination meter and seat belt buckle switch LH.
• Check combination meter. Refer to MWI-23, "
CONSULT-III Function (METER/M&A)".
2.SEAT BELT BUCKLE LH
Fasten the seat belt buckle LH.
Does the seat belt warning lamp go OFF?
YES >> GO TO 3
NO >> • Check seat belt buckle switch LH. • Check harness between combination meter and seat belt buckle switch LH.
3.OCCUPANT CLASSIFICATION SYSTEM
Have a helper sit in the passenger seat.
Does the seat belt warning lamp go ON?
YES >> GO TO 4
NO >> • Check occupant classification system. Refer to SRC-10, "
Occupant Classification System
(OCS)".
• Check harness between occupant classification control unit and air bag diagnosis sensor unit.
4.SEAT BELT BUCKLE RH
Fasten the seat belt buckle RH.
Does the seat belt warning lamp go OFF?
YES >> System OK.
NO >> • Check seat belt buckle switch RH. • Check harness between seat belt buckle switch RH and air bag diagnosis sensor unit.
• Replace air bag diagnosis sensor unit. Refer to SR-17, "
Removal and Installation".
Revision: April 20092010 QX56

SRC-92
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005369814
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 for SRS "AIR BAG" and "S EAT BELT PRE-TENSIONER" Service
INFOID:0000000005147853
• Do not use electrical test equipment to check SRS ci rcuits unless instructed to in this Service Manual.
• Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 min- utes.
For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-
tensioner to deploy. Therefore, do not work on any SR S connectors or wires until at least 3 minutes have
passed.
• The air bag diagnosis sensor unit must always be installed with the arrow mark “ ⇐” pointing toward the front
of the vehicle for proper operation. Also check air bag diagnosis sensor unit for cracks, deformities or rust
before installation and replace as required.
• The spiral cable must be aligned with the neutral position since its rotations are limited. Do not attempt to
turn steering wheel or column after removal of steering gear.
• Handle air bag module carefully. Always place driver and front passenger air bag modules with the pad side facing upward and seat mounted front side air bag module standing with the stud bolt side facing down.
• Conduct self-diagnosis to check entire SRS for proper function after replacing any components.
• After air bag inflates, the front instrument panel assembly should be replaced if damaged.
Occupant Classification System PrecautionINFOID:0000000005147854
Replace occupant classification system control uni t and passenger front seat cushion as an assembly.
Revision: April 20092010 QX56

PRECAUTIONSST-3
< PRECAUTION >
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005399828
The Supplemental Restraint System such as “AIR 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 SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, 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 unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• 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 Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric 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 Wheel Rotation After Battery Disconnect
INFOID:0000000005288074
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 disconnecti ng 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 power 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: April 20092010 QX56

ST-18
< REMOVAL AND INSTALLATION >
STEERING WHEEL
REMOVAL AND INSTALLATION
STEERING WHEEL
Removal and InstallationINFOID:0000000005147870
REMOVAL
1. Set the front wheels in the straight-ahead position.
2. Remove the driver air bag module. Refer to SR-5, "
Removal and Installation".
3. Disconnect steering wheel switches.
4. Remove the steering wheel center nut.
5. Remove the steering wheel using Tool.
CAUTION:
Place a piece of tape across the sp iral cable so it will not be
rotated out of position.
6. Disconnect heated steering wheel connector.
7. Inspect the steering wheel near the puller holes for damage. If damaged, replace the steering wheel.
• Remove steering wheel rear cover and steering wheelswitches, if required.
INSTALLATION
Installation is in the reverse order of removal.
• Align spiral cable correctly when installing steering wheel. Makesure that the spiral cable is in the neutral position. The neutral
position is detected by turning left 2.5 revolutions from the right
end position and ending with the knob at the top.
• Refer to BRC-8, "
ADJUSTMENT OF STEERING ANGLE SEN-
SOR NEUTRAL POSITION : Special Repair Requirement" for
steering angle sensor adjustment.
• After the work is completed, perform self-diagnosis to make sure no malfunction is detected. Refer to SRC-13, "
SRS Operation
Check".
• Tighten steering wheel center nut to specification. SR-7, "
Removal
and Installation".
CAUTION:
• The spiral cable may snap due to steering operation if the
cable is not installed in the correct position.
• With the steering linkage di sconnected, the cable may snap
by turning the steering wheel beyond the limited number of
turns. The spiral cable can be turned counterclockwise about
2.5 turns from the neutral position. Tool number : ST27180001 (J-25726-A)
SGIA1524J
WGIA0038E
PHIA0275E
Revision: April 20092010 QX56

TILT SYSTEMST-19
< REMOVAL AND INSTALLATION >
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TILT SYSTEM
Removal and InstallationINFOID:0000000005147871
TILT MOTOR AND TILT SENSOR
Removal
1. Remove the lower driver instrument panel. Refer to IP-11, "Exploded View".
2. Disconnect the sonar switch.
3. Disconnect adjustable pedal switch.
4. Remove steering column cover
5. Disconnect the tilt sensor electrical connector.
6. Remove knee protector.
7. Remove the two tilt sensor screws and the tilt sensor.
8. Disconnect the tilt motor electrical connector.
9. Remove the tilt motor bolt and the tilt motor.
Installation
Installation is in reverse order of removal.
NOTE:
Make sure the tab in the tilt sensor is engaged in the bracket on the tilt motor.
AWGIA0086GB
1. Tilt sensor 2. Tilt motor
LGIA0026E
Revision: April 20092010 QX56

ST-20
< REMOVAL AND INSTALLATION >
STEERING COLUMN
STEERING COLUMN
Removal and InstallationINFOID:0000000005147872
CAUTION:
• Any time the ignition switch has been disconnecter, removed or installed, the keys must be re-rege-
stered in the BCM. Refer toConsult-III operations IVIS/NVIS.
• Do not exert any load or impact in the axial dir ection immediately before or after column removal.
• Do not to move steering gear during removal of steering column assembly.
REMOVAL
1. Remove combination switch and spiral cable from steering column assembly. Refer to SR-7, "Removal
and Installation".
2. Remove the tilt motor and tilt sensor. Refer to ST-19, "
Removal and Installation".
3. Remove steering column cover. Refer to ST-20, "
Removal and Installation".
1. Driver air bag module2. Steering wheel3. Steering wheel side cover
4. Combination switch and spiral cable 5. Steering column assembly 6. Collar
7. Hole cover seal 8. Clamp9. Hole cover plate
10. Hole cover 11. Upper joint12. Upper shaft
13. Boot clamp 14. Lower joint shaft15. Boot and clips (plastic)
A. Refer to SR-5, "
Removal and Installation"
AWGIA0113GB
Revision: April 20092010 QX56

ST-24
< REMOVAL AND INSTALLATION >
POWER STEERING GEAR AND LINKAGE
7. Remove steering outer socket from steering knuckle using Tool.Be careful not to damage ball joint boot.
CAUTION:
Temporarily tighten nut to prevent damage to threads and
to prevent Tool from coming off.
8. Remove oil piping (high pressure side and low pressure side) from steering gear assembly, then drain fluid from piping.
9. Remove lower joint bolt of lower joint shaft.
10. Remove nuts of steering gear assembly using power tool, then remove bolts and steering gear assembly.
INSTALLATION
Installation is in the reverse order of removal.
• After removing/installing or replacing steering components, check wheel alignment. Refer to FSU-6, "
Front
Wheel Alignment".
• After adjusting wheel alignment, adjust neutral position of steering angle sensor. Refer to BRC-8, "
ADJUST-
MENT OF STEERING ANGLE SENSOR NEUTRAL POSITION : Special Repair Requirement".
Tool number : HT72520000 (J-25730-A)
WGIA0130E
LGIA0032E
LGIA0029E
LGIA0024E
Revision: April 20092010 QX56

ST-26
< REMOVAL AND INSTALLATION >
POWER STEERING OIL PUMP
POWER STEERING OIL PUMP
Removal and InstallationINFOID:0000000005147874
REMOVAL
1. Drain power steering fluid from reservoir tank.
2. Remove engine room cover. Refer to EM-24, "
Removal and Installation".
3. Remove air duct assembly. Refer to EM-25, "
Removal and Installation".
4. Remove power steering reservoir tank.
5. Remove serpentine drive belt belt from auto tensioner and power steering pump. Refer to EM-13,
"Removal and Installation".
6. Disconnect pressure sensor electrical connector.
7. Remove high pressure and low pressure piping from power steering oil pump. Refer to ST-27
.
8. Remove bolts, then remove power steering pump.
INSTALLATION
Installation is in the reverse order of removal. Refer to ST-27 for tightening torque.
• After installation, bleed air. Refer to ST-13, "
Air Bleeding Hydraulic System".
NOTE:
Belt tension is automatic and requires no adjustment.
Revision: April 20092010 QX56

STR-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005315461
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:0000000005315460
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: April 20092010 QX56