wheel INFINITI FX35 2007 Service Manual

SRS-42
DRIVER AIR BAG MODULE
Revision: 2006 July 2007 FX35/FX45
DRIVER AIR BAG MODULEPFP:K8510
Removal and InstallationNHS0007L
REMOVAL
CAUTION:

Before servicing SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3
minutes.

Always work from the side of driver air bag module.

Do not use air tools or electric tools for servicing.
1. Remove the side lids.
2. Remove the right and left side TORX bolts (T30).
3. Lift up the driver air bag module.
4. Disconnect the air bag harness connector, and remove the driver air bag module.
NOTE:

For installing / removing driver air bag module connector,
insert thin screwdriver wrapped in tape into notch, lift lock and
remove connector.

Install connector with lock raised, and push lock into connec-
tor.

After installing the connector, make sure that the lock is
pushed securely into it.
PHIA0685E
1. Driver air bag module 2. Steering wheel 3. TORX bolt T30 (LH/RH)
4. Side lid (LH/RH)
PHIA0714E
PHIA0308E

DRIVER AIR BAG MODULE SRS-43
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SRS
Revision: 2006 July 2007 FX35/FX45
CAUTION:

Always place driver air bag module with pad side facing
upward.

Do not insert any foreign objects (screwdriver, etc.) into
driver air bag module.

Do not disassemble driver air bag module.

Do not use old bolts after removal; replace with new bolts.

Do not expose the driver air bag module to temperatures
exceeding 90 °C (194 °F).

Replace driver air bag module if it has been dropped or sus-
tained an impact.

Do not allow oil, grease or water to come in contact with the
driver air bag module.
INSTALLATION
Install in the reverse order of removal.
CAUTION:

Fix the air bag module harness (shown as A in the figure) to
the harness fixing hook (shown as B in the figure).

Be careful not to damage the harness while installing.

Tighten the special bolts after exactly adjusting the centers of fixing holes on the air bag module
side and the steering wheel side. If the holes are misaligned, the bolt threads are damaged and the
module is not installed securely.

After the work is completed, make sure no system malfunction is detected by air bag warning
lamp.

In case that malfunction is detected by the air bag warning lamp, reset by the self-diagnosis func-
tion and delete the memory by CONSOULT–II.

In case that malunction is still detected after the above operation, peform self-diagnosis to repair
malfunctions. Refer to Refer to SRS-20, "
SRS Operation Check" .
PHIA0320E
SBF814E
PHIA0885J

SRS-44
SPIRAL CABLE
Revision: 2006 July 2007 FX35/FX45
SPIRAL CABLEPFP:25554
Removal and InstallationNHS0007M
REMOVAL
CAUTION:

Before servicing SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3
minutes.

Do not use air tools or electric tools for servicing.
1. Remove driver air bag module. Refer to SRS-42, "
Removal and Installation" .
2. Disconnect steering switch harness connector.
3. Set the steering wheel in the neutral position.
4. Removal steering wheel. Refer to PS-12, "
Removal and Installation" .
5. Remove steering column covers. Refer to IP-11, "
Removal and Installation" .
6. Loosen the spiral cable fixing screws, and then remove the spiral cable. CAUTION:

Do not disassemble spiral cable.

Do not apply lubricant to the spiral cable.

Do not make an impact to the spiral cable by dropping etc. Replace the spiral cable if it has been
dropped or sustained an impact.
7. Disconnect the horn switch connector, and then the spiral cable connector.
CAUTION:

Do not tap or bump the steering wheel.

Also, with the steering linkage disconnected the cable
may snap by turning the steering wheel beyond the lim-
ited number of turns.
8. Remove the wiper washer switch and lighting switch from the spiral cable.
PHIA1336E
1. Steering wheel 2. Spiral cable 3. Driver air bag module connector
4. Screw 5. Wiper and washer switch 6. Lighting and turn signal switch
7. Steering column assembly 8. Steering column cover (upper) 9. Steering column cover (lower)
SHIA0193E

SPIRAL CABLE SRS-45
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SRS
Revision: 2006 July 2007 FX35/FX45
INSTALLATION
Install in the reverse order of removal.
CAUTION:

The spiral cable may snap by steering operation if the cable
is installed in an improper position.

The neutral position is set as follows.
Turn quietly the spiral cable clockwise to the end position.
Then turn it counterclockwise (about 2 and half turns) and
stop turning at the point on which the stopper insertion
holes are in the same position.
The service part is installed in the neutral position by the
stopper and can be set without adjusting after the stopper
is removed.

Do not turn the spiral cable rashly and also beyond the limit
number of turns. (These will cause cable snap.)

Adjust the spiral cable locating pin (showed as A inthe fig-
ure) to the steering wheel locating pin hole (showed as C in
the figuer).

Secure the air bag harness with the harness fixing hook.

After the work is completed, make sure no system malfunc-
tion is detected by air bag warning lamp.

In case that malfunction is detected by the air bag warning
lamp, reset by the self-diagnosis function and delete the
memory by CONSULT −II.

In case that malfunction is still detected after the above
operation, perform self-diagnosis to repair malfunctions.
Refer to SRS-20, "
SRS Operation Check" .
PHIA0887J

SRS-56
COLLISION DIAGNOSIS
Revision: 2006 July 2007 FX35/FX45
Steering wheel [same text as in current manual]
Spiral cable If the Driver airbag has deployed: REPLACE the spiral cable. If the Driver airbag has not deployed:
[same text as in current manual]
Harness and con-
nectors 1. Check connectors for poor connection, damage, and terminals for deformities.
2. Check harness for binding, chafing, cuts, or deformities.
3. If no damage is found, reinstall the harness and connectors.
4. If damaged—REPLACE damaged section of harness. Do not repair, splice or modify any SRS harness.
Instrument panel 1. Visually check instrument panel for damage. 2. If no damage is found, reinstall the instrument panel.
3. If damaged—REPLACE the instrument panel with bolts.
Part SRS is activated SRS is NOT activated

TF-1
TRANSFER
D DRIVELINE/AXLE
CONTENTS
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SECTION
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B
TF
Revision: 2006 July 2007 FX35/FX45
TRANSFER
PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 3
Precautions ......................................................... ..... 3
Service Notice or Precautions ............................. ..... 4
PREPARATION ...................................................... ..... 5
Special Service Tools .......................................... ..... 5
Commercial Service Tools ................................... ..... 7
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ........................................... ..... 8
NVH Troubleshooting Chart ................................ ..... 8
TRANSFER FLUID ................................................ ..... 9
Replacement ....................................................... ..... 9
DRAINING ........................................................ ..... 9
FILLING ............................................................ ..... 9
Inspection ............................................................ ..... 9
FLUID LEAKAGE AND FLUID LEVEL ............. ..... 9
AWD SYSTEM ....................................................... ... 10
Power Transfer Diagram ..................................... ... 10
System Description ............................................. ... 10
DESCRIPTION ................................................. ... 10
ELECTRIC CONTROLLED COUPLING .......... .... 11
AWD CONTROL UNIT ..................................... .... 11
AWD WARNING LAMP .................................... ... 12
System Diagram .................................................. ... 12
COMPONENTS FUNCTION DESCRIPTION .. ... 13
CAN Communication ........................................... ... 13
SYSTEM DESCRIPTION ................................. ... 13
TROUBLE DIAGNOSIS ......................................... ... 14
Fail-Safe Function ............................................... ... 14
How to Perform Trouble Diagnosis ..................... ... 14
BASIC CONCEPT ............................................ ... 14
Location of Electrical Parts .................................. ... 15
Circuit Diagram ................................................... ... 16
Wiring Diagram — AWD — ................................. ... 17
Trouble Diagnosis Chart for Symptoms .............. ... 20
AWD Control Unit Input/Output Signal Reference
Values ................................................................. ... 21 AWD CONTROL UNIT INSPECTION TABLE ..
... 21
CONSULT-II Function (ALL MODE AWD/4WD) .. ... 22
FUNCTION ....................................................... ... 22
CONSULT-II SETTING PROCEDURE ............. ... 22
SELF-DIAG RESULT MODE ............................ ... 22
DATA MONITOR MODE ................................... ... 24
ACTIVE TEST MODE ...................................... ... 25
AWD CONTROL UNIT PART NUMBER .......... ... 25
TROUBLE DIAGNOSIS FOR SYSTEM ................. ... 26
Power Supply Circuit for AWD Control Unit ......... ... 26
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ............................................. ... 26
DIAGNOSTIC PROCEDURE ........................... ... 26
AWD Control Unit ................................................ ... 27
DIAGNOSTIC PROCEDURE ........................... ... 27
ABS System ........................................................ ... 27
DIAGNOSTIC PROCEDURE ........................... ... 27
AWD Solenoid ..................................................... ... 28
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ............................................. ... 28
DIAGNOSTIC PROCEDURE ........................... ... 28
COMPONENT INSPECTION ........................... ... 30
AWD Actuator Relay ............................................ ... 31
CONSULT-II REFERENCE VALUE IN DATA
MONITOR MODE ............................................. ... 31
DIAGNOSTIC PROCEDURE ........................... ... 31
Engine Control Signal .......................................... ... 32
DIAGNOSTIC PROCEDURE ........................... ... 32
CAN Communication Line ................................... ... 32
DIAGNOSTIC PROCEDURE ........................... ... 32
TROUBLE DIAGNOSIS FOR SYMPTOMS ........... ... 33
AWD Warning Lamp Does Not Turn ON When The
Ignition Switch Is Turned to ON ........................... ... 33
DIAGNOSTIC PROCEDURE ........................... ... 33
AWD Warning Lamp Does Not Turn OFF Several
Seconds after Engine Started .............................. ... 33
DIAGNOSTIC PROCEDURE ........................... ... 33
Heavy Tight-Corner Braking Symptom Occurs
When The Vehicle Is Driven and The Steering Wheel
Is Turned Fully to Either Side after The Engine Is

TF-10
AWD SYSTEM
Revision: 2006 July 2007 FX35/FX45
AWD SYSTEMPFP:41650
Power Transfer DiagramNDS0009U
System DescriptionNDS0009V
DESCRIPTION

Electronic control allows optimal distribution of torque to front/rear wheels to match road conditions.

Makes possible stable driving, with no wheel spin, on snowy roads or other slippery surfaces.

On roads which do not require AWD, it contributes to improved fuel economy by driving in conditions close
to rear-wheel drive.

Sensor inputs determine the vehicle's turning condition, and in response tight cornering/braking are con-
trolled by distributing optimum torque to front wheels.
NOTE:

When driving, if there is a large difference between front and rear wheel speed which continues for a long
time, fluid temperature of drive system parts becomes too high and AWD warning lamp flashes rapidly.
(When AWD warning lamp flashes, vehicle changes to rear-wheel drive conditions.) Also, optional distri-
bution of torque sometimes becomes rigid before lamp flashes rapidly, but it is not malfunction.

If AWD warning lamp is flashing rapidly, stop vehicle and allow it to idle for some time. Flashing will stop
and AWD system will be restored.

When driving, AWD warning lamp may flash slowly if there is a significant difference in diameter of the
tires. At this time, vehicle performance is not fully available and cautious driving is required. (Continues
until engine is turned OFF.)

If the warning lamp flashes slowly during driving but remains OFF after engine is restarted, the system is
normal. If it again flashes slowly after driving for some time, vehicle must be inspected.

When the difference of revolution speed between the front and rear wheel mode the shift occasionally
changes to direct 4-wheel driving conditions automatically. This is not malfunction.
SDIA1611E

AWD SYSTEM TF-11
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Revision: 2006 July 2007 FX35/FX45
ELECTRIC CONTROLLED COUPLING
Operation Principle
1. AWD control unit supplies command current to electric controlled coupling (AWD solenoid).
2. Control clutch is engaged by electromagnet and torque is detected in control clutch.
3. The cam operates in response to control clutch torque and applies pressure to main clutch.
4. Main clutch transmits torque to front wheels according to pressing power.

Transmission torque to front wheels is determined according
to command current.
AWD CONTROL UNIT

Controls distribution of drive power between rear-wheel drive
(0:100) and AWD (50:50) conditions according to signals from
sensors.

Self-diagnosis can be done with CONSULT-II.
SDIA2270E
SDIA1844E
SDIA2273E

TF-12
AWD SYSTEM
Revision: 2006 July 2007 FX35/FX45
AWD WARNING LAMP
Turns ON when there is a malfunction in AWD system. It indicates that fail-safe mode is engaged and vehicle
change to rear-wheel drive or shifting driving force-AWD (Front-wheels still have some driving torque).
Also turns ON when ignition switch is turned ON, for purpose of lamp check. Turns OFF approximately for 1
seconds after the engine starts if system is normal.
AWD Warning Lamp Indication
System DiagramNDS0009W
Condition AWD warning lamp
Lamp check Turns ON when ignition switch is turned ON. Turns OFF
approx. 1 second after engine start.
AWD system malfunction ON
Protection function is activated due to heavy load to electric con-
trolled coupling. (AWD system is not malfunctioning and AWD system
changes to 2WD mode.) Rapid flashing: 2 times/second
(Flashing in approx. 1 minute and then turning OFF.)
Large difference in diameter of front/rear tires Slow flashing: 1 time/2 seconds
(Continuing to flash until turning ignition switch OFF)
Other than above (system normal) OFF
SDIA2160E

AWD SYSTEM TF-13
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Revision: 2006 July 2007 FX35/FX45
COMPONENTS FUNCTION DESCRIPTION
CAN CommunicationNDS0009X
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
For details, refer to LAN-49, "
CAN System Specification Chart" .
Component parts Function
AWD control unit

Controls driving force distribution by signals from each sensor and switch from rear wheel driving
mode (0:100) to AWD mode (50:50).

2WD mode is available by fail-safe function if malfunction is detected in AWD system.
Wheel sensors Detects wheel speed.
AWD solenoid Controls electric controlled coupling by command current from AWD control unit.
Electric controlled coupling Transmits driving force to front final drive.
AWD warning lamp

Illuminates if malfunction is detected in electrical system of AWD system.

There is 1 blink in 2 seconds if rotation difference of front wheels and rear wheels is large.

There are 2 blinks in 1 second if load is still applied to driving parts.
ABS actuator and electric unit
(control unit) Transmits the following signals via CAN communication to AWD control unit.

Vehicle speed signal

Stop lamp switch signal (brake signal)
ECM Transmits the following signals via CAN communication to AWD control unit.

Accelerator pedal position signal

Engine speed signal
Unified meter and A/C amp. Transmits conditions of parking brake switch via CAN communication to AWD control unit.