2006 INFINITI FX35 ABS

PRECAUTIONS BR-3
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Revision: 2006 December 2006 FX35/FX45
PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
NFS000LN
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 Procedures without Cowl Top CoverNFS000LO
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc.
Precautions for Brake SystemNFS000LP

Clean dust on front brake and rear brake with a vacuum dust collector. Do not blow with compressed air.

Recommended fluid is brake fluid “DOT 3”. MA-12, "Fluids and Lubricants" .

Do not reuse drained brake fluid.

Be careful not to splash brake fluid on painted areas.

To clean or wash all parts of master cylinder, disc brake caliper and wheel cylinder, use new brake fluid.

Do not use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.

Use a flare nut torque wrench when installing brake tube.

When installing brake piping, be sure to check torque.

Before working, turn ignition switch OFF and disconnect con-
nectors for ABS actuator and electric unit (control unit) or battery
cables.

Burnish the brake contact surfaces after refinishing or replacing
drums or rotors, after replacing pads or linings, or if a soft pedal
occurs at very low mileage.
Refer to BR-24, "
Brake Burnishing Procedure" (Front disc
brake), BR-31, "
Brake Burnishing Procedure" (Rear disc brake).
WARNING:

Clean brake pads and shoes with a waste cloth, then clean with a dust collector.
PIIB3706J
SBR686C

BR-14
BRAKE MASTER CYLINDER
Revision: 2006 December 2006 FX35/FX45
5. Remove master cylinder assembly mounting nut, remove master cylinder assembly from the vehicle. Refer to BR-16, "
Removal and Installation" .
INSTALLATION
CAUTION:

Refill with new brake fluid “DOT3”.

Do not reuse drained brake fluid.
1. Install in the reverse order of removal, and tighten mounting nuts to the specified torque. Refer to BR-15,
"Components" .
2. Refill brake fluid and bleed air. Refer to BR-10, "
Bleeding Brake System" .
Disassembly and AssemblyNFS000M4
DISASSEMBLY
CAUTION:

Master cylinder can not be disassembled.

Remove reservoir tank only when absolutely necessary.
1. Remove pin (1).
2. Remove reservoir tank and grommet from master cylinder assembly.
ASSEMBLY
CAUTION:

Do not use mineral oil such as kerosene, gasoline during the cleaning and assembly process.

Do not drop parts. If a part is dropped, do not use it.
1. Apply brake fluid grommet and attach to master cylinder assembly. CAUTION:
Do not reuse grommet.
Do not reuse pin.
2. Install reservoir tank onto master cylinder assembly.
3. Install pin (1).
PFIA0816E
PFIA0816E

BR-16
BRAKE BOOSTER
Revision: 2006 December 2006 FX35/FX45
Removal and InstallationNFS000M6
REMOVAL
CAUTION:

Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is
splashed on painted surfaces of body, immediately wipe it off and them wash it away with water
immediately.

Be careful not to deform or bend brake tube while removing and installing brake booster.

Replace clevis pin if it is damaged.

Be careful not to damage brake booster stud bolt threads. If brake booster is tilted or inclined dur-
ing installation, dash panel may damage the threads.

Install the check valve in the correct direction.
1. Remove vacuum hose from brake booster. Refer to BR-17, "
VACUUM LINES" .
2. Remove brake master cylinder. Refer to BR-13, "
Removal and Installation" .
3. Disconnect harness connector from brake booster assembly. (ICC model)
4. Remove snap pin and clevis pin from inside the vehicle. Refer to BR-7, "
Components" .
5. Remove nuts from brake booster and brake pedal bracket.
6. Remove brake booster assembly from engine room.
INSPECTION AFTER REMOVAL
Output Rod Length Inspection
1. Using a handy vacuum pump, apply a vacuum of –66.7 kPa (– 500 mmHg, –19.69 inHg) to brake booster.
2. Check output rod length.
INSTALLATION
1. Loosen lock nut to adjust input rod length so that the length “B” (shown in the figure) satisfies the specified value.
2. After adjusting “B”, temporarily tighten lock nut to install brake booster assembly to the vehicle. At this time, make sure to
install a gasket between brake booster assembly and the engine
room.
3. Connect brake pedal with clevis of input rod.
4. Install brake pedal bracket mounting nuts and bolt and tighten them to the specified torque. BR-7, "
Components" .
5. Install brake tube from brake master cylinder to ABS actuator. Refer to BR-11, "
Hydraulic Circuit" .
6. Install master cylinder to booster assembly. Refer to BR-13, "
Removal and Installation" .
7. Adjust the height and play of brake pedal. BR-6, "
Inspection and Adjustment" .
8. Tighten lock nut of input rod to the specified torque. Refer to BR-15, "
Components" .
9. Bleed air. Refer to BR-10, "
Bleeding Brake System" .
Standard dimension when applying a vacuum of
− 66.7 kPa ( −500 mmHg, −19.69 inHg):
15.6 − 15.9 mm (0.614 − 0.626 in)
SFIA2146E
Length “B” : 126.5 mm (4.98 in)
SGIA0060E

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]
C
D E
G H
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K L
M A
B
BRC
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.

PREPARATION BRC-5
[VDC/TCS/ABS]
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D E
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BRC
Revision: 2006 December 2006 FX35/FX45
PREPARATIONPFP:00002
Special Service ToolsNFS000MZ
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolsNFS000N0
Tool number
(Kent-Moore No.)
Tool name Description
ST30720000
(J 25405)
Drift
a: 77 mm (3.03 in) dia.
b: 55.5 mm (2.19 in) dia.
Installing rear sensor rotor
ST27863000
(—)
Drift
a: 74.5 mm (2.93 in) dia.
b: 62.5 mm (2.46 in) dia.
KV40104710
(—)
Drift
a: 76.3 mm (3.00 in) dia.
b: 67.9 mm (2.67 in) dia.
ZZA0701D
ZZA0832D
ZZA0832D
Tool name Description
1: Flare nut crowfoot
a: 10 mm (0.39 in)/ 12 mm (0.47 in)
2: Torque wrench Installing brake tube
S-NT360