steering wheel INFINITI QX56 2009 Factory Manual Online

PRECAUTIONSDLK-225
< PRECAUTION > [WITH INTELLIGENT KEY SYSTEM]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005877749
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:0000000005877750
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: December 20092009 QX56

DLN-3
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NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ........................ ..
119
NVH Troubleshooting Chart ................................ ..119
PRECAUTION ............................................120
PRECAUTIONS .............................................. ..120
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
120
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
120
Precaution for Transfer Assembly and Transfer
Control Unit Replacement .....................................
121
Precaution .............................................................121
Service Notice .......................................................122
PREPARATION .........................................123
PREPARATION .............................................. ..123
Special Service Tool ........................................... ..123
Commercial Service Tool ......................................125
ON-VEHICLE MAINTENANCE ..................127
TRANSFER OIL FILTER ................................ ..127
Removal and Installation ..................................... ..127
TRANSFER FLUID ...........................................129
Replacement ....................................................... ..129
Inspection ..............................................................129
ON-VEHICLE REPAIR ...............................130
TRANSFER CONTROL UNIT ........................ ..130
Removal and Installation ..................................... ..130
FRONT OIL SEAL ............................................131
Removal and Installation ..................................... ..131
REAR OIL SEAL ..............................................133
Removal and Installation ..................................... ..133
SIDE OIL SEAL ................................................135
Removal and Installation ..................................... ..135
TRANSFER CONTROL DEVICE .....................136
Removal and Installation ..................................... ..136
AIR BREATHER HOSE ....................................137
Removal and Installation ..................................... ..137
TRANSFER MOTOR ........................................140
Removal and Installation ..................................... ..140
REMOVAL AND INSTALLATION .............141
TRANSFER ASSEMBLY ............................... ..141
Removal and Installation ..................................... ..141
DISASSEMBLY AND ASSEMBLY ............142
TRANSFER ASSEMBLY ............................... ..142
Disassembly and Assembly ................................. ..142
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... ...........................................
179
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
179
General Specification .......................................... ..179
Inspection and Adjustment ....................................179
PROPELLER SHAFT: 2F1310
PRECAUTION ............... .............................
181
PRECAUTIONS ...............................................181
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
181
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
181
PREPARATION .........................................183
PREPARATION ...............................................183
Commercial Service Tool .................................... ..183
SYMPTOM DIAGNOSIS ............................184
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING .........................
184
NVH Troubleshooting Chart ................................ ..184
ON-VEHICLE REPAIR ...............................185
PROPELLER SHAFT ......................................185
On-Vehicle Service .............................................. ..185
REMOVAL AND INSTALLATION .............186
PROPELLER SHAFT ......................................186
Removal and Installation ..................................... ..186
DISASSEMBLY AND ASSEMBLY ............188
PROPELLER SHAFT ......................................188
Disassembly and Assembly ................................. ..188
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... ...........................................
190
SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................
190
General Specification .......................................... ..190
Snap Ring ..............................................................190
PROPELLER SHAFT: 2S1410
PRECAUTION ............... .............................
191
PRECAUTIONS ...............................................191
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
191
Revision: December 20092009 QX56

DLN-4
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
191
PREPARATION ..........................................193
PREPARATION .............................................. .193
Commercial Service Tool .................................... ..193
SYMPTOM DIAGNOSIS ............................194
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
194
NVH Troubleshooting Chart ................................ ..194
ON-VEHICLE REPAIR ............................. ..195
PROPELLER SHAFT ..................................... .195
On-Vehicle Service .............................................. ..195
REMOVAL AND INSTALLATION ..............196
PROPELLER SHAFT ..................................... .196
Removal and Installation ..................................... ..196
DISASSEMBLY AND ASSEMBLY ............199
PROPELLER SHAFT ..................................... .199
Disassembly and Assembly ................................. ..199
SERVICE DATA AND SPECIFICATIONS
(SDS) .............. ............................................
201
SERVICE DATA AND SPECIFICATIONS
(SDS) ............................................................... .
201
General Specification .......................................... ..201
Snap Ring ..............................................................201
FRONT FINAL DRIVE: M205
PRECAUTION ....... ....................... ..............
203
PRECAUTIONS .............................................. .203
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. ..
203
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
203
Precaution for Servicing Front Final Drive .............204
PREPARATION ..........................................205
PREPARATION .............................................. .205
Special Service Tool ............................................ ..205
Commercial Service Tool ......................................207
SYMPTOM DIAGNOSIS ............................208
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... .
208
NVH Troubleshooting Chart ................................ ..208
ON-VEHICLE MAINTENANCE ..................209
DIFFERENTIAL GEAR OIL ............................ ..209
Changing Differential Gear Oil ............................. .209
Checking Differential Gear Oil ..............................209
ON-VEHICLE REPAIR ..............................210
SIDE OIL SEAL .............................................. ..210
Removal and Installation ...................................... .210
FRONT OIL SEAL ............................................211
Removal and Installation ...................................... .211
CARRIER COVER .......................................... ..214
Removal and Installation ...................................... .214
REMOVAL AND INSTALLATION .............215
FRONT FINAL DRIVE .................................... ..215
Removal and Installation ...................................... .215
DISASSEMBLY AND ASSEMBLY ...........217
FRONT FINAL DRIVE .................................... ..217
Disassembly and Assembly ................................. .217
SERVICE DATA AND SPECIFICATIONS
(SDS) ............... ..........................................
234
SERVICE DATA AND SPECIFICATIONS
(SDS) .............................................................. ..
234
General Specification ........................................... .234
Inspection and Adjustment ....................................234
REAR FINAL DRIVE: R230
PRECAUTION ............... ............................
236
PRECAUTIONS .............................................. ..236
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
236
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ................................
236
Precaution for Servicing Rear Final Drive .............237
PREPARATION .........................................238
PREPARATION .............................................. ..238
Special Service Tool ............................................ .238
Commercial Service Tool ......................................240
SYMPTOM DIAGNOSIS ...........................242
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING ......................... ..
242
NVH Troubleshooting Chart ................................. .242
DESCRIPTION ..................................................243
Cross-Sectional View ........................................... .243
ON-VEHICLE MAINTENANCE .................244
DIFFERENTIAL GEAR OIL ............................ ..244
Revision: December 20092009 QX56

DIAGNOSIS AND REPAIR WORKFLOWDLN-9
< BASIC INSPECTION > [ATX14B]
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Flash rapidly>>Refer to DLN-112, "Diagnosis Procedure".
Flash slowly>>Refer to DLN-113, "Diagnosis Procedure"
.
NO >> GO TO 2.
2.CHECK TIGHT CORNER BRAKING SYMPTOM (1)
1. Set 4WD shift switch to AUTO position.
2. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned.
Does tight corner braking symptom occur?
YES >> GO TO DLN-114, "Diagnosis Procedure".
NO >> GO TO 3.
3.CHECK TIGHT CORNER BRAKING SYMPTOM (2)
1. Set 4WD shift switch to 4HI position.
2. Drive vehicle at speed lower than 20 km/h (12 MPH) with steering wheel fully turned.
Does tight corner braking symptom occur?
YES >> Inspection End.
NO >> GO TO DLN-118, "Diagnosis Procedure"
.
Revision: December 20092009 QX56

DLN-102
< SYMPTOM DIAGNOSIS >[ATX14B]
4WD SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
4WD SYSTEM SYMPTOMS
Symptom TableINFOID:0000000003772161
If 4WD warning lamp turns ON, perform self-diagnosis. Refer to
DLN-18, "CONSULT-III Function (ALL MODE AWD/4WD)".
NOTE:
 Light tight-corner braking symptom may occur depending on driving conditions in AUTO mode. This is not a
malfunction.
 Heavy tight-corner braking symptom occurs when vehicle is driven in the following conditions: 4WD shift
switch is 4H or 4LO, steering wheel is turned fully to either side.
Symptom Condition Reference page
4WD shift indicator lamp and 4LO indicator lamp do not turn ON
(4WD shift indicator lamp and 4LO indicator lamp check) Ignition switch: ON
DLN-103
4WD warning lamp does not turn ON
(4WD warning lamp check) Ignition switch: ON
DLN-105
4WD shift indicator lamp or 4LO indicator lamp does not change Engine running DLN-107
ATP warning lamp does not turn ON Engine runningDLN-109
4WD shift indicator lamp keeps flashing Engine running DLN-111
4WD warning lamp flashes rapidly (2 times/second) While drivingDLN-112
4WD warning lamp flashes slowly
(1 time/2 seconds)While driving
DLN-113
Heavy tight-corner braking symptom occurs
(See NOTE.)  While driving
AUTO mode
 Steering wheel is turned fully
to either side DLN-114
ATP switch does not operate Engine running
DLN-116
4WD system does not operate While drivingDLN-118
Revision: December 20092009 QX56

DLN-114
< SYMPTOM DIAGNOSIS >[ATX14B]
HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURS
HEAVY TIGHT-CORNER BR
AKING SYMPTOM OCCURS
DescriptionINFOID:0000000003772176
This symptom occurs when the vehicle is accelerati ng in 4WD and the steering wheel is turned fully either
direction. It may feel like a bump or being pushed fr om behind. A small amount of this bumping feeling is
acceptable under certain road conditions. The transfer case may be adjusted using the CONSULT-III to com-
pensate for this condition.
Diagnosis ProcedureINFOID:0000000003772177
DIAGNOSTIC PROCEDURE
NOTE:
 Light tight-corner braking symptom may occur depending on driving conditions in AUTO mode. This is not a malfunction.
 Heavy tight-corner braking symptom occurs when vehicle is driven in the following conditions: 4WD shift
switch is 4H or 4LO, steering wheel is turned fully to either side.
1.CHECK SYSTEM FOR CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to DLN-18, "CONSULT-III Function (ALL MODE AWD/4WD)"
.
Is CAN COMM CIRCUIT [U1000] displayed?
YES >> Perform trouble diagnosis for CAN communication line.
NO >> GO TO 2.
2.CHECK SYSTEM FOR 4WD SHIFT SWITCH
Perform trouble diagnosis for 4WD shift switch system. Refer to DLN-31, "Diagnosis Procedure"
.
Are the inspection results normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK ACCELERATOR PEDAL POSITION SIGNAL CIRCUIT
Perform self diagnosis for ECM. Refer to EC-63, "CONSULT-III Function (ENGINE)"
.
Is any malfunction deteced by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 4.
4.CHECK SYSTEM FOR CLUT CH PRESSURE SOLENOID
Perform trouble diagnosis for clutch pressure solenoid system. Refer to DLN-70, "Diagnosis Procedure"
.
Are the inspection results normal?
YES >> GO TO 5.
NO >> Repair or replace damaged parts.
5.SYMPTOM CHECK
Check again.
Are the inspection results normal?
YES >> Inspection End.
NO >> GO TO 6.
6.CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to DLN-81, "Reference Value"
.
Are the inspection results normal?
YES >> GO TO 7.
NO >> Check transfer control unit pin terminals fo r damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
7.CHECK TRANSFER INNER PARTS
1. Disassemble transfer assembly. Refer to DLN-142, "Disassembly and Assembly"
.
2. Check transfer inner parts.
Revision: December 20092009 QX56

DLN-120
< PRECAUTION >[ATX14B]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005874977
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 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 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 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 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 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:0000000005874978
NOTE:
 This Procedure is applied only to models with Intelli gent 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: December 20092009 QX56

PRECAUTIONSDLN-181
< PRECAUTION > [PROPELLER SHAFT: 2F1310]
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M A
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DLN
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O P
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005875025
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 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 Wh eel Rotation After Battery Disconnect
INFOID:0000000005875026
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 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: December 20092009 QX56

DLN-184
< SYMPTOM DIAGNOSIS >[PROPELLER SHAFT: 2F1310]
NOISE, VIBRATION, AND HARSHNESS
(NVH) TROUBLESHOOTING
SYMPTOM DIAGNOSIS
NOISE, VIBRATION, AND HARSHNESS (NVH) TROUBLESHOOTING
NVH Troubleshooting ChartINFOID:0000000003772204
Use the chart below to help you find the cause of the sy mptom. If necessary, repair or replace these parts.
×: ApplicableReference page
DLN-185, "On-Vehicle Service"DLN-185, "On-Vehicle Service"DLN-185, "On-Vehicle Service"
DLN-208, "NVH Troubleshooting Chart"RAX-5, "NVH Troubleshooting Chart"RSU-5, "NVH Troubleshooting Chart"WT-36, "NVH Troubleshooting Chart"WT-36, "NVH Troubleshooting Chart"FAX-9, "Removal and Installation"BR-6, "NVH Troubleshooting Chart"ST-12, "NVH Troubleshooting Chart"
Possible cause and suspected parts
Uneven rotation torque
Rotation imbalance
Excessive run out
Differential
Axle
Suspension
Tires
Road wheel
Drive shaft
Brakes
Steering
Symptom
Noise
×××××××××××
Shake ×××××××
Vibration ××××××××
Revision: December 20092009 QX56

PRECAUTIONSDLN-191
< PRECAUTION > [PROPELLER SHAFT: 2S1410]
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DLN
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005875031
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 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 Wh eel Rotation After Battery Disconnect
INFOID:0000000005875032
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 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: December 20092009 QX56