2006 INFINITI FX35 Ac system

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

REAR DISC BRAKE BR-27
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Revision: 2006 December 2006 FX35/FX45
Removal and Installation of Brake Caliper AssemblyNFS000MH
REMOVAL
1. Remove tires from vehicle with power tool.
2. Fasten disc rotor using wheel nut.
3. Drain brake fluid. Refer to BR-9, "
Drain and Refill" .
4. Remove union bolt and torque member bolts, and remove brake caliper assembly from the vehicle.
CAUTION:
Put matching marks on both disc rotor and wheel hub when
removing disc rotor.
5. Remove disc rotor.
INSTALLATION
CAUTION:

Refill with new brake fluid “DOT 3”.

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 the vehicle, and tighten bolts to the specified torque. Refer to BR-25, "
Compo-
nents" .
CAUTION:
Before installing caliper assembly to the vehicle, wipe off oil and grease on washer seats on axle
assembly and mounting surface of caliper assembly.
3. Install brake hose to caliper assembly and tighten union bolt to the specified torque. Refer to BR-25,
"Components" .
CAUTION:

Do not reuse copper washer for union bolts.

Securely install brake hose to protrusion 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 the vehicle.
Disassembly and Assembly of Brake Caliper AssemblyNFS000MI
NOTE:
Do not remove torque member, brake pads, shims, shim covers and pad retainers, when disassembling or
assembling cylinder body.
DISASSEMBLY
1. Remove sliding pin bolts, and then remove brake pads, shims, shim covers, and pad retainer from torque
member and cylinder.
CAUTION:
Do not drop brake pads, shims, shim cover and pad retainer from torque member.
2. Remove sliding pin boot from torque member.
PFIA0413E

BR-30
REAR DISC BRAKE
Revision: 2006 December 2006 FX35/FX45
7. Assembling shims and shim covers to pad. CAUTION:
When attaching pad retainer, install it firmly so that it does
not float up higher than torque member, as shown in the fig-
ure.
8. Install brake pad retainer and pad to torque member.
9. Install cylinder body. Tighten sliding pin bolts to the specified torque. Refer to BR-25, "
Components" .
10. After installing caliper assembly, refill with new brake fluid and bleed air. Refer to BR-10, "
Bleeding Brake System" .PFIA0273E

BRC-1
BRAKE CONTROL SYSTEM
F BRAKES
CONTENTS
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SECTION BRC
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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-

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-4
[VDC/TCS/ABS]
PRECAUTIONS
Revision: 2006 December 2006 FX35/FX45

If there is a radio, antenna, or antenna lead-in wire (including wiring) near control module, VDC/TCS/ABS
function may have a malfunction or error.

If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits, and improper wiring.

If the following components are replaced with non-genuine components or converted, VDC OFF indicator
lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Components
related to suspension (shock absorber, strut, spring, bushing, etc.), Tires, wheels (exclude specified size),
components related to brake (pad, rotor, caliper, etc.), components related to engine (muffler, ECM, etc.),
components related to body reinforcement (roll bar, tower bar, etc.).

Driving in the condition of breakage or excessive wear of suspension, tires or components related to the
brakes may cause VDC OFF indicator lamp and SLIP indicator lamp turn on, and the VDC system may
not operate properly.

When the TCS or VDC is activated by sudden acceleration or sudden turn, some noise may occur. The
noise is a result of the normal operation of the TCS and VDC.

When driving on roads which have extreme slopes (such as mountainous roads) or high banks (such as
sharp carves on a freeway), the VDC may not operate normally, or VDC OFF indicator lamp and SLIP
indicator lamp may turn on. However, this is not a malfunction, if normal operation can be resumed after
restarting engine.

Sudden turns (such as spin turns, acceleration turns), drifting, etc. When VDC function is OFF (VDC OFF
SW ON) may cause the G sensor system indicate a malfunction. However, this is not a malfunction, if nor-
mal operation can be resumed after restarting engine.

Change 4 tires at a time. Be sure to use specified-size tires that have the same brand name and pattern.
Wheel sensor errors can be detected be self-diagnosis when tires have wide abrasion variations or the
size is different from the genuine tires.

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

SYSTEM DESCRIPTION BRC-9
[VDC/TCS/ABS]
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Revision: 2006 December 2006 FX35/FX45
ABS

The Anti-Lock Brake System is a function that detects wheel revolution while braking, and it improves
handling stability during sudden braking by electrically preventing 4 wheel lock. Maneuverability is also
improved for avoiding obstacles.

If the electrical system malfunctions, then the fail-safe function starts, the ABS becomes inoperative, and
ABS warning lamp turns on.

Electrical system diagnosis by CONSULT-II is available.

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

When starting engine, or just after starting vehicle, brake pedal may vibrate or motor operating noises
may be heard from engine compartment. 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.
EBD

The Electronic Brake Distribution is a function that detects subtle slippages between front and rear wheels
during braking, and it improves handling stability by electronically controlling the brake fluid pressure
which results in reduced rear wheel slippage.

In case of electrical system malfunction, the fail-safe function is activated, EBD and ABS becomes inoper-
ative, and ABS warning lamp and brake warning lamp are turned on.

Electrical system diagnosis by CONSULT-II is available.

During EBD operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.

When starting engine, or just after starting vehicle, brake pedal may vibrate or motor operating noises
may be heard from engine compartment. This is a normal status of operation check.

Stopping distance may be longer than that of vehicles without EBD when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
Fail-Safe FunctionNFS000N8
VDC / TCS SYSTEM
In case of malfunction in the VDC/TCS system, VDC OFF indicator lamp and SLIP indicator lamp are turned
on, and the condition of vehicle is the same as the condition of vehicles without VDC/TCS system. In case of
malfunction in the VDC/TCS system, the ABS control continues to operate normally without VDC/TCS control.
CAUTION:
If the fail-safe function is activated, then perform the self-diagnosis for VDC/TCS/ABS control system.
ABS, EBD SYSTEM
In case of electrical malfunctions with the ABS, ABS warning lamp, VDC OFF indicator lamp and SLIP indica-
tor lamp will turn on. In case of electrical malfunctions with the EBD, brake warning lamp, ABS warning lamp,
VDC OFF indicator lamp and SLIP indicator lamp will turn on. Simultaneously, the VDC/TCS/ABS become one
of the following conditions of the fail-safe function.

For malfunction of ABS, only the EBD is activated and the condition of vehicle is the same condition of
vehicles without TCS/ABS system.
NOTE:
ABS self-diagnosis sound may be heard. That is a normal condition because a self-diagnosis for “Ignition
switch ON” and “The first starting” are being performed.

For malfunction of EBD, EBD and ABS become inoperative, and the condition of vehicle is the same as
the condition of vehicles without TCS/ABS, EBD system.