sensor INFINITI QX56 2010 Factory Service Manual

SN-44
< ECU DIAGNOSIS >
SONAR CONTROL UNIT FOR FRONT AND REAR SONAR SYSTEM
DTC Index
INFOID:0000000005146212
DTC Malfunction Service Procedure
B2700 Front sonar sensor LH outer Replace sonar sensor. Refer to
SN-49, "
Removal and Installa-
tion".
B2701 Front sonar sensor LH outer harness 1. Check harness for open or short. Refer to SN-15, "
Diag-
nosis Procedure (With Front and Rear Sonar System)".
2. Replace sonar sensor. Refer to SN-49, "
Removal and In-
stallation".
B2702 Front sonar sensor RH outer Replace sonar sensor. Refer to
SN-49, "
Removal and Installa-
tion".
B2703 Front sonar sensor RH outer harness 1. Check harness for open or short. Refer to SN-15, "
Diag-
nosis Procedure (With Front and Rear Sonar System)".
2. Replace sonar sensor. Refer to SN-49, "
Removal and In-
stallation".
B2704 Rear sonar sensor LH outer Replace sonar sensor. Refer to
SN-49, "
Removal and Installa-
tion".
B2705 Rear sonar sensor LH outer harness 1. Check harness for open or short. Refer to SN-15, "
Diag-
nosis Procedure (With Front and Rear Sonar System)".
2. Replace sonar sensor. Refer to SN-49, "
Removal and In-
stallation".
B2706 Rear sonar sensor RH outer Replace sonar sensor. Refer to
SN-49, "
Removal and Installa-
tion".
B2707 Rear sonar sensor RH outer harness 1. Check harness for open or short. Refer to SN-15, "
Diag-
nosis Procedure (With Front and Rear Sonar System)".
2. Replace sonar sensor. Refer to SN-49, "
Removal and In-
stallation".
B2708 Rear sonar sensor LH inner Replace sonar sensor. Refer to
SN-49, "
Removal and Installa-
tion".
B2709 Rear sonar sensor LH inner harness 1. Check harness for open or short. Refer to SN-15, "
Diag-
nosis Procedure (With Front and Rear Sonar System)".
2. Replace sonar sensor. Refer to SN-49, "
Removal and In-
stallation".
B270A Rear sonar sensor RH inner Replace sonar sensor. Refer to
SN-49, "
Removal and Installa-
tion".
B270B Rear sonar sensor RH inner harness 1. Check harness for open or short. Refer to SN-15, "
Diag-
nosis Procedure (With Front and Rear Sonar System)".
2. Replace sonar sensor. Refer to SN-49, "
Removal and In-
stallation".
B270C Front sonar sensor LH inner Replace sonar sensor. Refer to
SN-49, "
Removal and Installa-
tion".
B270D Front sonar sensor LH inner harness 1. Check harness for open or short. Refer to SN-15, "
Diag-
nosis Procedure (With Front and Rear Sonar System)".
2. Replace sonar sensor. Refer to SN-49, "
Removal and In-
stallation".
B270E Front sonar sensor RH inner Replace sonar sensor. Refer to
SN-49, "
Removal and Installa-
tion".
B270F Front sonar sensor RH inner harness 1. Check harness for open or short. Refer to SN-15, "
Diag-
nosis Procedure (With Front and Rear Sonar System)".
2. Replace sonar sensor. Refer to SN-49, "
Removal and In-
stallation".
Revision: April 20092010 QX56

SN
SONAR SYSTEM SYMPTOMSSN-45
< SYMPTOM DIAGNOSIS >
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SYMPTOM DIAGNOSIS
SONAR SYSTEM SYMPTOMS
Symptom TableINFOID:0000000005146213
Symptom Repair order
When the sonar system is OFF, the OFF indicator does not light
and the sonar buzzer does not sound. 1. Check sonar system OFF switch. Refer to
SN-20, "
Compo-
nent Inspection" or SN-19, "Diagnosis Procedure (With
Front and Rear Sonar System)".
2. Check harness and connections for sonar system OFF
switch.
3. Replace sonar control unit. Refer to SN-50, "
Removal and
Installation".
When the sonar system is OFF, the OFF indicator lamp does not
light but the sonar buzzer does sound. 1. Check sonar system OFF switch. Refer to
SN-19, "
Diagno-
sis Procedure (With Rear Sonar System)" or SN-19, "Diag-
nosis Procedure (With Front and Rear Sonar System)".
2. Check harness and connections for sonar system OFF indi- cator lamp.
3. Replace sonar control unit.
When the sonar system is OFF, the sonar buzzer does not sound
but the OFF indicator lamp lights. 1. Check sonar buzzer. Refer to
SN-18, "
Component Inspec-
tion" or SN-17, "Diagnosis Procedure (With Front and Rear
Sonar System)".
2. Check harness and connections between sonar buzzer and sonar control unit.
3. Replace sonar control unit.
When sonar system is ON, the sonar system OFF indicator lamp
lights up and the sonar buzzer sounds intermittently (for about 4
seconds). (Rear sonar system only) 1. Check harnesses between sonar sensors and sonar control
unit for an open condition.
2. Check sonar sensors. Refer to SN-5, "
Preliminary Check".
3. Replace sonar control unit.
The sonar system still operates when the sonar system is OFF. 1. Replace sonar control unit.
When the transmission gear selector lever is in the R position and
the sonar system is ON, the rear sonar system does not operate. 1. Check transmissin range switch. Refer to
TM-45, "
Diagnosis
Procedure".
2. Check back-up lamp relay.
3. Check related harness and connections for back-up lamp re- lay.
4. Replace sonar control unit.
When the transmission gear selector lever is in a forward drive
gear and the sonar system is ON, the front sonar system does not
operate. (With front and rear sonar system only) 1. Check harness and connections between sonar control unit
and combination meter.
2. Replace sonar control unit.
Sonar system OFF indicator lamp lights up and buzzer sounds al-
though there are no obstacles within the detection range. 1. Check sonar sensors.
2. Check harness and connections between sonar sensors
and sonar control unit.
3. Replace sonar control unit.
The sonar sensors do not detect objects in the detectable range. 1. Check sonar sensors.
2. Replace sonar control unit.
Revision: April 20092010 QX56

SN-46
< PRECAUTION >
PRECAUTION
PRECAUTION
PRECAUTION
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005403331
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:0000000005403332
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

SN
SONAR SENSORSN-49
< REMOVAL AND INSTALLATION >
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REMOVAL AND INSTALLATION
SONAR SENSOR
Removal and InstallationINFOID:0000000005146216
FRONT SONAR SENSOR
Removal
1. Remove the front fascia assembly. Refer to EXT-13, "Removal and Installation".
2. Remove the front sonar sensor (1) from the front fascia assem-
bly.
3. Disconnect the front s onar sensor connector.
4. Remove the front sonar sensor retainer from the front fascia assembly.
Installation
Installation is in the reverse order of removal.
REAR SONAR SENSOR
Removal
1. Remove the rear fascia assembly. Refer to EXT-15, "Removal and Installation".
2. Remove the rear sonar sensor (1) from the rear fascia assem- bly.
3. Disconnect the rear s onar sensor connector.
4. Remove the rear sonar sensor retainer from the rear fascia assembly.
Installation
Installation is in the reverse order of removal.
AWNIA1410ZZ
AWNIA1411ZZ
Revision: April 20092010 QX56

SR-1
RESTRAINTS
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SECTION SR
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CONTENTS
SRS AIRBAG
PRECAUTION ....... ........................................2
PRECAUTIONS .............................................. .....2
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
2
Precaution for SRS "AIR BAG" and "SEAT BELT
PRE-TENSIONER" Service ......................................
2
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
2
Occupant Classification System Precaution .............3
PREPARATION ............................................4
PREPARATION .............................................. .....4
Special Service Tool ........................................... ......4
ON-VEHICLE REPAIR ..................................5
DRIVER AIR BAG MODULE .......................... .....5
Removal and Installation ...........................................5
SPIRAL CABLE ............................................. .....7
Removal and Installation ...........................................7
FRONT PASSENGER AIR BAG MODULE ......10
Removal and Installation ..................................... ....10
SIDE CURTAIN AIR BAG MODULE ................13
Removal and Installation .........................................13
CRASH ZONE SENSOR ...................................14
Removal and Installation ..................................... ....14
SIDE AIR BAG (SATELLITE) SENSOR ...........15
Removal and Installation .........................................15
FRONT SEAT BELT PRE-TENSIONER ...........16
Removal and Installation .........................................16
DIAGNOSIS SENSOR UNIT .............................17
Removal and Installation .........................................17
OCCUPANT CLASSIFICATION SYSTEM
CONTROL UNIT ................................................
19
Removal and Installation .........................................19
COLLISION DIAGNOSIS ..................................20
For Frontal Collision ................................................20
For Side and Rollover Collision ...............................21
Revision: April 20092010 QX56

SR-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005250379
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:0000000005147754
• 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 terminals and wait at least 3 min- utes.
For approximately 3 minutes after the terminals are remov ed, it is still possible for the air bags and seat belt
pre-tensioners to deploy. Therefore, do not work on any SRS 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.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000005256816
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.
Revision: April 20092010 QX56

SR-8
< ON-VEHICLE REPAIR >
SPIRAL CABLE
6. While pressing tabs, pull lighting and turn signal switch towarddriver door and disconnect from base.
7. Remove the screws, release the clip, and remove the spiral cable.
CAUTION:
• Do not disassemble spiral cable.
• Do not apply lubricant to the spiral cable.
8. Remove the spiral cable connectors. CAUTION:
With the steering linkage di sconnected, the spiral cable
may snap by turning the steer ing wheel beyond the limited
number of turns. The spiral cable can be turned counter-
clockwise about 2.5 turns fr om the neutral position.
9. Remove the steering angle sensor from the spiral cable. Refer to BRC-118, "
Removal and Installation".
INSTALLATION
Installation is in the reverse order of removal.
• Align spiral cable correctly when installing steering wheel. Make
sure 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.
• If equipped with VDC, refer to BRC-8, "
ADJUSTMENT OF STEER-
ING ANGLE SENSOR 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".
CAUTION:
LHIA0035E
LHIA0036E
SHIA0193E
WGIA0038E
Revision: April 20092010 QX56

SR-14
< ON-VEHICLE REPAIR >
CRASH ZONE SENSOR
CRASH ZONE SENSOR
Removal and InstallationINFOID:0000000005147761
REMOVAL
CAUTION:
• Before servicing the SRS, turn the ignition switch off, disconnect both battery terminals and wait at
least three minutes.
• Replace crash zone sensor if it has been dropped or sustained an impact.
• Do not disassemble crash zone sensor.
1. Disconnect both the negative and positive battery terminals, then wait at least three minutes.
2. Disconnect the crash zone sensor harness connector.
3. Remove crash zone sensor nuts.
INSTALLATION
Installation is in the reverse order of removal.
• After the work is complete, perform self-diagnosis to check that no malfunction is detected. Refer to SRC-13,
"SRS Operation Check".
LHIA0056E
Revision: April 20092010 QX56

SIDE AIR BAG (SATELLITE) SENSORSR-15
< ON-VEHICLE REPAIR >
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SIDE AIR BAG (S ATELLITE) SENSOR
Removal and InstallationINFOID:0000000005147762
REMOVAL
CAUTION:
• Before servicing the SRS, turn the ignition switch off, disconnect both battery terminals and wait at
least three minutes.
• Do not use old nuts after removal; replace with new nuts.
• Check side air bag (satellite) sensor to make sure it is free of deformities, dents, cracks or rust. If it
shows any visible signs of da mage, replace it with new one.
• Do not disassemble side air bag (satellite) sensor.
• Replace side air bag (satellite ) sensor if it has been dropped or sustained an impact.
1. Disconnect both the negative and positive battery te rminals, then wait at least three minutes.
2. Remove seat belt retractor and belt assembly anchor bolt and retractor bolt upper, then set assembly
aside. Refer to SB-4, "
Removal and Installation of Front Seat Belt".
3. Remove side air bag (satellite) sensor nuts.
4. Disconnect the side air bag (satellite) sensor harness connector.
INSTALLATION
Installation is in the reverse order of removal.
• After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to SRC-
13, "SRS Operation Check".
LHIA0057E
Revision: April 20092010 QX56

DIAGNOSIS SENSOR UNITSR-17
< ON-VEHICLE REPAIR >
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DIAGNOSIS SENSOR UNIT
Removal and InstallationINFOID:0000000005147764
REMOVAL
WARNING:
• Before servicing the SRS, turn the ignition switch off, disconnect both battery terminals and wait at
least three minutes.
• Do not use old bolts; replace with new bolts.
• Check diagnosis sensor unit bracket to make sure it is free of deformities, dents, cracks or rust. If it
shows any visible signs of damage, replace with new one.
• Replace diagnosis sensor unit if it has been dropped or sustained an impact.
• Never use air tools or el ectric tools for servicing.
• When replacing the air bag diagnosis sensor unit, always check with the parts department for the lat-
est parts information. Installing an incorrect air bag diagnosis sensor unit may or may not cause the
air bag warning lamp to illuminate and may cause incorrect deployment of the supplemental air bags
and seat belt pre-tensioner in a collision r esulting in serious personal injury or death.
1. Disconnect the both the negative and positive battery terminals, then wait at least three minutes.
2. Disconnect the harness connectors for each air bag module and seat belt pre-tensioner. Refer to SR-5,
"Removal and Installation", SR-10, "Removal and Installation", SR-13, "Removal and Installation", SE-69,
"Disassembly and Assembly", SB-4, "Removal and Installation of Front Seat Belt".
3. Remove center console. Refer to IP-20, "
Removal and Installation".
4. Disconnect diagnosis sensor unit harness connectors.
5. Remove bolts from the diagnosis sensor unit.
INSTALLATION
Installation is in the reverse order of removal.
• After the work is completed, perform self-diagnosis to check that no malfunction is detected. Refer to SRC-
13, "SRS Operation Check".
CAUTION:
• The diagnosis sensor unit must always be installed with the arrow mark " ⇐" pointing toward the
front of the vehicle for proper operation.
• Never damage the harness while installing.
• If malfunction is detected by the air bag warnin g lamp, after repair or replacement of the malfunc-
tioning parts, reset the memory using sel f-diagnosis or CONSULT-III. Refer to SRC-15, "
Self-Diagno-
sis Function (Without CONSULT-III)".
• After the work is completed, check that no system malfunction is detected by air bag warning lamp.
1. Diagnosis sensor unit⇐Vehicle front
AWHIA0159ZZ
Revision: April 20092010 QX56