2006 INFINITI FX35 steering

FRONT DISC BRAKE BR-21
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Revision: 2006 December 2006 FX35/FX45
4. Remove union bolts and torque member bolts, and remove brake caliper assembly from the vehicle.
5. Remove disc rotor. CAUTION:
Put matching marks on both disc rotor and wheel hub when
removing disc rotor.
INSTALLATION
CAUTION:

Refill with new brake fluid “DOT3”.

Do not reuse drained brake fluid.
1. Install disc rotor.
CAUTION:
Align the matching marks of disc rotor and wheel hub, which were marked at the time of removal
when reusing disc rotor.
2. Install caliper assembly to vehicle, and tighten mounting bolts to the specified torque. Refer to BR-19,
"Components" .
CAUTION:
Before installing torque member to vehicle, wipe oil and grease on washer seats on steering
knuckle and mounting surface of torque member.
3. Install a projection of brake hose metal fitting by aligning with protrusions on cylinder body, and tighten union bolts to the specified torque. Refer to BR-19, "
Components" .
CAUTION:

Do not reuse copper washer for union bolts.

Assemble brake hose securely on caliper assembly.
4. After installing caliper assembly, refill with new brake fluid and bleed air. Refer to BR-10, "
Bleeding Brake
System" .
5. Install tires to vehicle.
Disassembly and Assembly of Brake Caliper AssemblyNFS000MD
NOTE:
Do not remove torque member, brake pads, shims, shim cover and pad retainer, when disassembling or
assembling cylinder body.
DISASSEMBLY
1. Remove caliper assembly from vehicle. Refer to BR-20,
"Removal and Installation of Brake Caliper Assembly" .
2. Remove sliding pin bolts from cylinder body, and remove pad, shim, shim cover and pad retainer from torque member.
CAUTION:
When removing pad retainer from torque member, lift the
pad retainer in the direction shown by arrow (shown in the
figure) so as not to deform it.
SFIA0140E
SBR556E

FRONT DISC BRAKE BR-23
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Revision: 2006 December 2006 FX35/FX45
2. Apply rubber grease to piston boot. Cover the piston end with piston boot, and install cylinder side lip on piston boot properly
into groove on cylinder body.
CAUTION:
Do not reuse piston boot.
3. Apply brake fluid to piston, and press piston into cylinder body by hand to assemble piston side lip on piston boot properly into
groove on piston.
CAUTION:
Press piston evenly and vary the pressing point to prevent
cylinder inner wall from being rubbed.
4. Install sliding pins and sliding pin boots to torque member.
5. Install the torque member to the knuckle spindle and tighten the mounting bolts to the specified torque. Refer to BR-19, "
Compo-
nents" .
CAUTION:
Before installing torque member to vehicle, wipe oil and
grease on the washer seats on steering knuckle and the
mounting surface of the torque member.
6. Install pad retainers to torque member.
7. After assembling shims and shim covers to pad, install it to torque member.
CAUTION:
Inner pad and outer pad have pad-return mechanism on the upper side of the pad retainer. When
installing pad, be sure to install pad return lever to pad wear sensor securely as shown in the fig-
ure.
8. Install cylinder body, and tighten sliding pin bolt to specified torque. Refer to BR-19, "
Components" .
9. Install a projection of brake hose metal fitting by aligning with protrusions on cylinder body, and then tighten union bolts to specified torque. Refer to BR-11, "
Hydraulic Circuit" .
CAUTION:

Assemble brake hose securely to protrusions on cylinder body.

Do not reuse copper washer for union bolts.
10. After installing caliper assembly, refill with new brake fluid and bleed air. Refer to BR-10, "
Bleeding Brake
System" .
SFIA2432E
SFIA2279E
SBR557E

BRC-1
BRAKE CONTROL SYSTEM
F BRAKES
CONTENTS
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SECTION BRC
A
B
BRC
Revision: 2006 December 2006 FX35/FX45
BRAKE CONTROL SYSTEM
VDC/TCS/ABS
PRECAUTIONS ..................................................... ..... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 3
Precautions for Brake System ............................. ..... 3
Precautions for Brake Control ............................. ..... 3
PREPARATION ...................................................... ..... 5
Special Service Tools .......................................... ..... 5
Commercial Service Tools ................................... ..... 5
ON-VEHICLE SERVICE ........................................ ..... 6
Adjustment of Steering Angle Sensor Neutral Posi-
tion ...................................................................... ..... 6
Calibration of Decel G Sensor (AWD Models) .... ..... 7
SYSTEM DESCRIPTION ....................................... ..... 8
System Diagram .................................................. ..... 8
Functions ............................................................. ..... 8
VDC .................................................................. ..... 8
TCS .................................................................. ..... 8
ABS .................................................................. ..... 9
EBD .................................................................. ..... 9
Fail-Safe Function ............................................... ..... 9
VDC / TCS SYSTEM ........................................ ..... 9
ABS, EBD SYSTEM ......................................... ..... 9
Hydraulic Circuit Diagram ................................... ... 10
CAN Communication ........................................... ... 10
SYSTEM DESCRIPTION ................................. ... 10
TROUBLE DIAGNOSIS ......................................... ....11
Fail-Safe Function ............................................... .... 11
VDC/TCS SYSTEM .......................................... .... 11
ABS, EBD SYSTEM ......................................... .... 11
How to Proceed with Diagnosis .......................... .... 11
BASIC CONCEPT ............................................ .... 11
DIAGNOSIS FLOWCHART ............................. ... 12
ASKING COMPLAINTS ................................... ... 13
EXAMPLE OF DIAGNOSIS SHEET ................ ... 13
Component Installation Location ......................... ... 14
Schematic ........................................................... ... 15
Wiring Diagram — VDC — .................................. ... 16
Control Unit Input/Output Signal Standard .......... ... 22 REFERENCE VALUE FROM CONSULT-II ......
... 22
CONSULT-II Functions (VDC) ............................. ... 24
CONSULT-II MAIN FUNCTION ........................ ... 24
CONSULT-II SETTING PROCEDURE ............. ... 24
Self-Diagnosis ..................................................... ... 25
DESCRIPTION ................................................. ... 25
OPERATION PROCEDURE ............................. ... 25
ERASE MEMORY ............................................ ... 25
DISPLAY ITEM LIST ........................................ ... 26
Data Monitor ........................................................ ... 29
OPERATION PROCEDURE ............................. ... 29
DISPLAY ITEM LIST ........................................ ... 29
Active Test ........................................................... ... 31
OPERATION PROCEDURE ............................. ... 31
TEST ITEM ....................................................... ... 32
For Fast and Accurate Diagnosis ........................ ... 33
PRECAUTIONS FOR DIAGNOSIS .................. ... 33
Basic Inspection .................................................. ... 34
BRAKE FLUID AMOUNT, LEAKS, AND BRAKE
PADS INSPECTION ......................................... ... 34
POWER SYSTEM TERMINAL LOOSENESS
AND BATTERY INSPECTION .......................... ... 34
ABS WARNING LAMP, VDC OFF INDICATOR
LAMP, SLIP INDICATOR LAMP AND BRAKE
WARNING LAMP INSPECTION ...................... ... 34
TROUBLE DIAGNOSIS FOR SYSTEM ................. ... 36
Wheel Sensor Circuit ........................................... ... 36
Engine System .................................................... ... 38
VDC/TCS/ABS Control Unit Circuit ..................... ... 38
Pressure Sensor Circuit ....................................... ... 39
Steering Angle Sensor Circuit .............................. ... 40
Yaw Rate/Side G Sensor (2WD Models), Yaw Rate/
Side/Decel G Sensor (AWD Models) Circuit ........ ... 41
Solenoid and VDC Change-Over Valve Circuit ... ... 43
Actuator Motor Circuit .......................................... ... 44
ABS Actuator and Electric Unit (Control Unit) Power
Supply and Ground Circuit .................................. ... 45
Stop Lamp Switch Circuit ..................................... ... 47
Brake Fluid Level Switch Circuit .......................... ... 48
When “ST ANG SEN SIGNAL” Appears on Self-

BRC-2Revision: 2006 December 2006 FX35/FX45 diagnosis Results Display ....................................
... 49
When “DECEL G SEN SET” Appears on Self-diag-
nostic Results Display (AWD Models) ................. ... 49
CAN Communication Circuit ................................ ... 50
Component Inspection ......................................... ... 50
VDC OFF SWITCH ........................................... ... 50
TROUBLE DIAGNOSIS FOR SYMPTOMS ........... ... 51
Excessive ABS Function Operation Frequency ... ... 51
Unexpected Pedal Reaction ................................ ... 51
The Braking Distance is Long .............................. ... 52
The ABS Function Does Not Operate ................. ... 52
Pedal Vibration or ABS Operation Sound Occurs ... 52
Vehicle Jerks During VDC/TCS/ABS Control ...... ... 53
WHEEL SENSORS ................................................ ... 55
Removal and Installation ..................................... ... 55
REMOVAL ........................................................ ... 55
INSTALLATION ................................................. ... 55 SENSOR ROTOR ...................................................
... 57
Removal and Installation ...................................... ... 57
REMOVAL ......................................................... ... 57
INSTALLATION ................................................. ... 57
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY) ... 58 Removal and Installation ...................................... ... 58
REMOVAL ......................................................... ... 58
INSTALLATION ................................................. ... 59
G SENSOR ............................................................. ... 60
Removal and Installation ...................................... ... 60
REMOVAL ......................................................... ... 60
INSTALLATION ................................................. ... 60
STEERING ANGLE SENSOR ................................ ... 61
Removal and Installation ...................................... ... 61
REMOVAL ......................................................... ... 61
INSTALLATION ................................................. ... 61

PRECAUTIONS BRC-3
[VDC/TCS/ABS]
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Revision: 2006 December 2006 FX35/FX45
[VDC/TCS/ABS]PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NFS000MW
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 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 whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:

To avoid rendering the SRS inoperative, 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 per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Brake SystemNFS000MX

Recommended fluid is brake fluid “DOT 3”. Refer to MA-12, "RECOMMENDED FLUIDS AND LUBRI-
CANTS" .

Do not reuse drained brake fluid.

Be careful not to splash brake fluid on painted areas such as body. If brake fluid is splashed, wipe it off
and flush area with water immediately.

Do not use mineral oils such as gasoline or kerosene to clean. They will ruin rubber parts and cause
improper operation.

Using a flare nut crowfoot and torque wrench, securely tighten
brake tube flare nuts.

Brake system is an important safety part. If a brake fluid leak is
detected, always disassemble the affected part. If a malfunction
is detected, replace part with a new one.

Before working, turn ignition switch OFF and disconnect electri-
cal connectors of ABS actuator and electric unit (control unit) or
battery negative terminal.

When installing brake piping, be sure to check torque.
WARNING:
Clean brake pads and shoes with a waste cloth, then wipe with
a dust collector.
Precautions for Brake ControlNFS000MY

During VDC/TCS/ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This
is normal.

Just after starting vehicle after turning ignition switch ON, brake pedal may vibrate or motor operating
noise may be heard from engine room. This is a normal status of operation check.

Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.

When an error is indicated by ABS or another warning lamp, collect all necessary information from cus-
tomer (what symptoms are present under what conditions) and check for simple causes before starting
diagnostic servicing. Besides electrical system inspection, check booster operation, brake fluid level, and
fluid leaks.

If tire size and type are used in an improper combination, or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.
SBR686C

BRC-6
[VDC/TCS/ABS]
ON-VEHICLE SERVICE
Revision: 2006 December 2006 FX35/FX45
ON-VEHICLE SERVICEPFP:00000
Adjustment of Steering Angle Sensor Neutral PositionNFS000N1
In case of doing work that applies to the list below, make sure to adjust neutral position of steering angle sen-
sor before running vehicle.
CAUTION:
To adjust neutral position of steering angle sensor, make sure to use CONSULT-II.
(Adjustment can not be done without CONSULT-II.)
1. Stop vehicle with front wheels in straight-ahead position.
2. Perform “CONSULT-II Starting Procedure”. Refer to GI-38, "
CONSULT-II Start Procedure" .
3. Touch “ABS”, “WORK SUPPORT” and “ST ANGLE SENSOR ADJUSTMENT” on CONSULT-II screen in this order.
4. Touch “START”. CAUTION:
Do not touch steering wheel while adjusting steering angle
sensor.
5. After approximately 10 seconds, touch “END”. (After approxi- mately 60 seconds, it ends automatically.)
6. Turn ignition switch OFF, then turn it ON again. CAUTION:
Be sure to perform above operation.
7. Run vehicle with front wheels in straight-ahead position, then stop.
8. Select “DATA MONITOR”, “SELECTION FROM MENU”, and “STR ANGLE SIG” on CONSULT-II screen. Then make sure “STR ANGLE SIG” is within 0 ± 3.5 deg. If value is more than specification, repeat steps
3 to 7.
9. Erase memory of ABS actuator and electric unit (control unit) and ECM.
10. Turn ignition switch OFF.
Situation Adjustment of Steering Angle Sensor Neutral Position
Removing/Installing ABS actuator and electric unit (control unit) —
Replacing ABS actuator and electric unit (control unit) ×
Removing/Installing steering angle sensor ×
Removing/Installing steering components ×
Removing/Installing suspension components ×
Change 4 tires to new ones —
Tire rotation —
Adjusting wheel alignment ×
SFIA0371E

BRC-8
[VDC/TCS/ABS]
SYSTEM DESCRIPTION
Revision: 2006 December 2006 FX35/FX45
SYSTEM DESCRIPTIONPFP:00000
System DiagramNFS000N3
FunctionsNFS000N4
VDC

In addition to the TCS/ABS function, the driver steering amount and brake operation amount are detected
from steering angle sensor and pressure sensor, and the vehicle's driving status (amount of under steer-
ing / over steering) is determined from information from G sensor, wheel sensor, etc., and this information
is used to improve vehicle stability by controlling the braking and engine power to all four wheels.

SLIP indicator lamp flashes to inform the driver of VDC operation.

During VDC operation, body and brake pedal lightly vibrate and mechanical noises may be heard. This is
normal.

ABS warning lamp, VDC OFF indicator lamp, and SLIP indicator lamp might turn on when vehicle is sub-
ject to strong shaking or large vibration, such as when vehicle is on a turn table, a ship or a steep slope
such as bank while engine is running. In this case, restart engine on a normal road, and if ABS warning
lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off, there is no malfunction.
TCS

The wheel spin of the drive wheels is detected by ABS actuator and electric unit (control unit) from the
wheel speed signals from four wheels, so if wheel spin occurs, drive wheel right and left brake fluid pres-
sure control and engine fuel cut are performed while throttle value is restricted to reduce the engine
torque and decrease the amount of wheel spin. In addition, the degree throttle is opened is controlled to
achieve the optimum engine torque.

Depending on road circumstances, the driver may have a sluggish feel. This is normal, because the opti-
mum traction has the highest priority under TCS operation.

TCS may be activated any time vehicle suddenly accelerates, suddenly down/upshifts, or is driven on a
road with a varying surface friction coefficient.

During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.
SFIA1160E

BRC-22
[VDC/TCS/ABS]
TROUBLE DIAGNOSIS
Revision: 2006 December 2006 FX35/FX45
Control Unit Input/Output Signal StandardNFS000NF
REFERENCE VALUE FROM CONSULT-II
CAUTION:
The display shows ABS actuator and electric unit (control unit) calculation data, so a normal value
might be displayed even in the event the output circuit (harness) is open or short-circuited.
Monitor item Display content Data monitor
Condition Reference value in
normal operation
SLCT LVR POSI A/T shift position P: P position
R: R position
N: N position
D: D position
GEAR A/T gear position 1: 1st gear
2: 2nd gear
3: 3rd gear
4: 4th gear
5: 5th gear
FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSOR Wheel speed Vehicle stopped 0 km/h
Vehicle running (Note 1) Almost in accor-
dance with speedom-
eter display
(within ± 10 %)
ACCEL POS SIG Open/close condition of throttle valve
(linked with accelerator pedal) Accelerator pedal not depressed
(ignition switch ON) 0 %
Depress accelerator pedal
(ignition switch ON) 0 to 100 %
ENGINE SPEED With engine running With engine stopped 0 rpm
Engine running Almost in accor-
dance with tachome-
ter display
STR ANGLE SIG Steering angle detected by steering angle
sensor Straight-ahead Approx. 0 deg
Steering wheel turned –756 to 756 deg
YAW RATE SEN Yaw rate detected by yaw rate sensor Vehicle stopped Approx. 0 d/s
Vehicle running –100 to 100 d/s
SIDE G-SENSOR Transverse G detected by side G sensor Vehicle stopped
Approx. 0 m/s
2
Vehicle running–16.7 to 16.7 m/s2
PRESS SENSOR Brake fluid pressure detected by pressure
sensor With ignition switch turned ON and brake
pedal released Approx. 0 bar
With ignition switch turned ON and brake
pedal depressed 0 to 170 bar
BATTERY VOLT Battery voltage supplied to ABS actuator
and electric unit (control unit) Ignition switch ON 10 to 16 V
STOP LAMP SW Brake pedal operation Brake pedal depressed ON
Brake pedal not depressed OFF
OFF SW VDC OFF switch ON/OFF status VDC OFF switch ON
(When VDC OFF indicator lamp is ON) ON
VDC OFF switch OFF
(When VDC OFF indicator lamp is OFF) OFF
ABS WARN LAMP ABS warning lamp ON condition (Note 2) ABS warning lamp ON ON
ABS warning lamp OFF OFF