Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan X-Trail 2005 2006 Approved 2006 BRC
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BRAKE CONTROL SYSTEM
F BRAKES
A
SECTION
BRAKE CONTROL SYSTEM
BRC B
C
D
E
CONTENTS
ABS For Fast and Accurate Diagnosis .......................... 23 . BRC
PRECAUTIONS FOR DIAGNOSIS .................... 23 .
PRECAUTIONS ......................................................... 4 . Basic Inspection .................................................... 23
.
Precautions for Supplemental Restraint System BRAKE FLUID LEVEL, LEAKAGE AND BRAKE G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- PAD .................................................................... 23
.
SIONER" ................................................................. 4
. POWER SUPPLY CIRCUIT TERMINAL LOOSE-
Precautions for Brake System ................................. 4 . NESS AND BATTERY ........................................ 24 .
Precautions for Brake Control ................................. 4 . H
INSPECTION OF ABS WARNING LAMP .......... 24 .
PREPARATION .......................................................... 5. TROUBLE DIAGNOSIS FOR SYSTEM ................... 25 .
Commercial Service Tools ....................................... 5 . Wheel Sensor ........................................................ 25
.
SYSTEM DESCRIPTION ........................................... 6 . INSPECTION PROCEDURE ............................. 25 . I
System Diagram ...................................................... 6. ABS Actuator and Electric Unit (Control Unit) ....... 27 .
Functions ................................................................. 6
. INSPECTION PROCEDURE ............................. 27 .
ABS ...................................................................... 6
. ABS Actuator and Electric Unit (Control Unit) Power J
EBD ...................................................................... 6
. Supply and Ground ................................................ 27 .
Operation That Is Not "System Error" ..................... 6 . INSPECTION PROCEDURE ............................. 27 .
ABS ...................................................................... 6
. ABS Actuator Relay or ABS Motor Relay .............. 28 .
Hydraulic Circuit Diagram ....................................... 7 . K
INSPECTION PROCEDURE ............................. 28 .
CAN Communication ............................................... 7 . G Sensor (Only AWD Models) ............................... 29 .
SYSTEM DESCRIPTION ..................................... 7 . INSPECTION PROCEDURE ............................. 29 .
TROUBLE DIAGNOSIS ............................................. 8 . CAN Communication ............................................. 31 . L
Fail-Safe Function ................................................... 8
. INSPECTION PROCEDURE ............................. 31 .
ABS, EBD ............................................................. 8
. Component Inspection ........................................... 32 .
How to Perform Trouble Diagnosis for Quick and PARKING BRAKE SWITCH ............................... 32 . M
Accurate Repair ...................................................... 8
. BRAKE FLUID LEVEL SWITCH ........................ 32 .
INTRODUCTION .................................................. 8 . TROUBLE DIAGNOSIS FOR SYMPTOMS ............. 33 .
DIAGNOSIS FLOW CHART ................................ 9 . Excessive ABS Function Operation Frequency ..... 33 .
ASKING COMPLAINTS ..................................... 10 . Unexpected Pedal Reaction .................................. 33 .
EXAMPLE OF DIAGNOSIS SHEET .................. 10 . The Stopping Distance Is Long .............................. 34 .
Component Parts Location .....................................11 . ABS Function Does Not Operate ........................... 35 .
Schematic ............................................................. 12
. Pedal Vibration or ABS Operation Sound Occurs... 35
Wiring Diagram -- ABS -- .................................... 13 . ABS Warning Lamp Indication Is Not Normal ........ 35 .
Control Unit Input/Output Signal Standard ............ 17 . WHEEL SENSORS .................................................. 36 .
REFERENCE VALUE FROM CONSULT-II ........ 17 . Removal and Installation ....................................... 36 .
CONSULT-II Functions (ABS) ............................... 18 . COMPONENTS .................................................. 36 .
CONSULT-II MAIN FUNCTION .......................... 18 . REMOVAL .......................................................... 36.
CONSULT-II BASIC OPERATION PROCEDURE INSTALLATION .................................................. 36 .
... 18 SENSOR ROTOR .................................................... 37 .
SELF-DIAGNOSIS ............................................. 18 . Removal and Installation (2WD Models) ............... 37 .
DATA MONITOR ................................................ 20 . REMOVAL .......................................................... 37.
ACTIVE TEST .................................................... 21 .
Revision: 2006 July BRC-1 2006 X-Trail
INSTALLATION ................................................... 37
. CONSULT-II BASIC OPERATION PROCEDURE
Removal and Installation (AWD Models) ............... 37 . ...61
REMOVAL .......................................................... 37
. SELF-DIAGNOSIS ..............................................61 .
INSTALLATION ................................................... 37
. DATA MONITOR ................................................64 .
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)... 38 ACTIVE TEST .....................................................66 .
Removal and Installation ....................................... 38 . For Fast and Accurate Diagnosis ...........................68 .
COMPONENTS .................................................. 38 . PRECAUTIONS FOR DIAGNOSIS ....................68 .
REMOVAL .......................................................... 39
. Basic Inspection .....................................................69 .
INSTALLATION ................................................... 39
. BRAKE FLUID LEVEL, LEAKAGE AND BRAKE
G SENSOR ............................................................... 40
. PAD .....................................................................69
.
Removal and Installation (Only AWD Models) ....... 40 . POWER SUPPLY CIRCUIT TERMINAL LOOSE-
REMOVAL .......................................................... 40
. NESS AND BATTERY ........................................69 .
INSTALLATION ................................................... 40
. ABS WARNING LAMP, BRAKE WARNING
LAMP, VDC OFF INDICATOR LAMP, AND SLIP
VDC/TCS/ABS INDICATOR LAMP ..............................................69 .
TROUBLE DIAGNOSIS FOR SYSTEM ...................71 .
PRECAUTIONS ........................................................ 41 . Wheel Sensor ........................................................71 .
Precautions for Supplemental Restraint System INSPECTION PROCEDURE ..............................71 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Engine System .......................................................73 .
SIONER" ................................................................ 41. INSPECTION PROCEDURE ..............................73 .
Precautions for Brake System ............................... 41 . VDC/TCS/ABS Control Unit ...................................73 .
Precautions for Brake Control ............................... 41 . INSPECTION PROCEDURE ..............................73 .
PREPARATION ........................................................ 42 . Pressure Sensor ....................................................73 .
Commercial Service Tools ..................................... 42 . INSPECTION PROCEDURE ..............................73 .
ON-VEHICLE SERVICE ........................................... 43 . Steering Angle Sensor ...........................................74 .
Adjustment of Steering Angle Sensor Neutral Posi- INSPECTION PROCEDURE ..............................74 .
tion ......................................................................... 43
. Yaw Rate/Side G Sensor .......................................76 .
SYSTEM DESCRIPTION ......................................... 44 . INSPECTION PROCEDURE ..............................76 .
System Diagram .................................................... 44 . Solenoid and VDC Switching Valve .......................77 .
Functions ............................................................... 44
. INSPECTION PROCEDURE ..............................77 .
ABS .................................................................... 44
. Actuator Motor and Motor Relay ............................79 .
EBD .................................................................... 44
. INSPECTION PROCEDURE ..............................79 .
ABLS (ACTIVE BRAKE LSD) ............................. 44 . Actuator Relay .......................................................80 .
TCS .................................................................... 44
. INSPECTION PROCEDURE ..............................80 .
VDC .................................................................... 45
. Stop Lamp Switch Circuit .......................................81 .
Operation That Is Not "System Error" .................... 45 . INSPECTION PROCEDURE ..............................81 .
ABS .................................................................... 45
. VDC/TCS/ABS Control Unit Power And Ground ...82
TCS .................................................................... 45
. INSPECTION PROCEDURE ..............................82 .
VDC .................................................................... 45
. Park/Neutral Position (PNP) Switch (Only A/T Mod-
Hydraulic Circuit Diagram ...................................... 46 . els) .........................................................................83
.
CAN Communication ............................................. 46 . INSPECTION PROCEDURE ..............................83 .
SYSTEM DESCRIPTION ................................... 46 . Brake Fluid Level Switch ........................................84 .
TROUBLE DIAGNOSIS ........................................... 47 . INSPECTION PROCEDURE ..............................84 .
Fail-Safe Function ................................................. 47 . CAN Communication .............................................85 .
ABS, EBD, ABLS ................................................ 47 . INSPECTION PROCEDURE ..............................85 .
VDC/TCS ............................................................ 47 . Component Inspection ...........................................85 .
How to Perform Trouble Diagnosis For Quick and VDC OFF SWITCH .............................................85 .
Accurate Repair ..................................................... 47 . PARKING BRAKE SWITCH ................................86 .
INTRODUCTION ................................................ 47 . BRAKE FLUID LEVEL SWITCH .........................86 .
DIAGNOSIS FLOW CHART ............................... 48 . MOTOR RELAY AND ACTUATOR RELAY ........86 .
ASKING COMPLAINTS ...................................... 49 . VDC ACTUATOR ................................................87 .
EXAMPLE OF DIAGNOSIS SHEET ................... 49 . TROUBLE DIAGNOSIS FOR SYMPTOMS .............88 .
Component Parts Location .................................... 50 . Excessive ABS Function Operation Frequency .....88 .
Schematic .............................................................. 51. Unexpected Pedal Reaction ..................................88 .
Wiring Diagram -- VDC -- .................................... 52 . The Stopping Distance Is Long ..............................89 .
Control Unit Input/Output Signal Standard ............. 58 . ABS Function Does Not Operate ...........................90 .
REFERENCE VALUE FROM CONSULT-II ........ 58 . Pedal Vibration or ABS Operation Sound Occurs ...90
CONSULT-II Functions (ABS) ................................ 60 . Vehicle Jerks During VDC/TCS/ABS Control .........90 .
CONSULT-II MAIN FUNCTION .......................... 60 . ABS Warning Lamp Indication Is Not Normal ........91 .
Revision: 2006 July BRC-2 2006 X-Trail
Slip Indicator Lamp Indication Is Not Normal ........ 91 . ACTUATOR .............................................................. 96
.
VDC OFF Indicator Lamp Indication Is Not Normal 92 ... Removal and Installation ....................................... 96 . A
Brake Warning Lamp Indication Is Not Normal ..... 92 . COMPONENTS .................................................. 96 .
WHEEL SENSORS .................................................. 93
. REMOVAL .......................................................... 97
.
Removal and Installation ....................................... 93
. INSTALLATION .................................................. 97. B
COMPONENTS ................................................. 93. G SENSOR ............................................................... 98
.
REMOVAL .......................................................... 93
. Removal and Installation ....................................... 98 .
INSTALLATION .................................................. 93
. REMOVAL .......................................................... 98
.
SENSOR ROTOR .................................................... 94
. INSTALLATION .................................................. 98. C
Removal and Installation ....................................... 94
. STEERING ANGLE SENSOR ................................. 99 .
REMOVAL .......................................................... 94
. Removal and Installation ....................................... 99 .
INSTALLATION .................................................. 94
. REMOVAL .......................................................... 99
. D
VDC/TCS/ABS CONTROL UNIT ............................. 95 . INSTALLATION .................................................. 99.
Removal and Installation ....................................... 95
. VDC OFF SWITCH ................................................. 100 .
REMOVAL .......................................................... 95
. Removal and Installation ..................................... 100 . E
INSTALLATION .................................................. 95
. REMOVAL ........................................................ 100
.
INSTALLATION ................................................ 100 .
BRC
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Revision: 2006 July BRC-3 2006 X-Trail
PRECAUTIONS
[ABS]
PRECAUTIONS
[ABS] PFP:00001
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" AFS002PO
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. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:
q 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.
q 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.
q 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 System AFS002LO
q Recommended fluid is brake fluid "DOT 3". Refer to MA-10, "RECOMMENDED FLUIDS AND LUBRI-
CANTS"
q Do not reuse drained brake fluid.
q 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.
q Do not use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.
q Use flare nut torque wrench when removing and installing brake
tube.
q 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.
q Before working, turn ignition switch OFF and disconnect con-
nectors of ABS actuator and electric unit (control unit) or battery
cables.
q When installing brake piping, be sure to check torque.
WARNING: SBR686C
Clean brake pads and shoes with a waste cloth, then wipe with
a dust collector.
Precautions for Brake Control AFS002LP
q Just after starting vehicle after 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.
q 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 brake booster operation, brake fluid
level, and fluid leaks.
q 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.
q If there is a radio, antenna, or antenna lead-in wire (including wiring) near control module, ABS function
may have a malfunction or error.
q If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits, and improper wiring.
Revision: 2006 July BRC-4 2006 X-Trail
PREPARATION
[ABS]
PREPARATION PFP:00002
A
Commercial Service Tools AFS002PB
Tool name Description
B
1.Flare nut crowfoot
a: 10 mm (0.39 in) Removing and installing each brake piping C
2.Torque wrench
S-NT360
D
E
BRC
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Revision: 2006 July BRC-5 2006 X-Trail
SYSTEM DESCRIPTION
[ABS]
SYSTEM DESCRIPTION PFP:00000
System Diagram AFS002LR
SFIA2390E
Functions AFS002P6
ABS
q 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.
q Electrical System Diagnosis by CONSULT-II is available.
EBD
q Electronic Brake Distribution is a function that detects subtle slippages between front and rear wheels dur-
ing braking, and it improves handling stability by electronically controlling Brake Fluid Pressure which
results in reduced rear wheel slippage.
q Electrical System Diagnosis by CONSULT-II is available.
Operation That Is Not "System Error" AFS002P7
ABS
q When starting engine or just after starting vehicle, brake pedal may vibrate or the motor operating noise
may be heard from engine room. This is a normal states of the operation check.
q During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.
q Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
Revision: 2006 July BRC-6 2006 X-Trail
SYSTEM DESCRIPTION
[ABS]
Hydraulic Circuit Diagram AFS002LV
A
B
C
D
E
BRC
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SFIA2479E
CAN Communication AFS0035N
SYSTEM DESCRIPTION J
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 K
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-21, "CAN Communication Unit" . L
M
Revision: 2006 July BRC-7 2006 X-Trail
TROUBLE DIAGNOSIS
[ABS]
TROUBLE DIAGNOSIS PFP:00004
Fail-Safe Function AFS0038H
ABS, EBD
In case of electrical malfunction with ABS, ABS warning lamp will turn on. In case of electrical incident with
EBD, ABS warning lamp will turn on. Simultaneously, ABS become one of following conditions of Fail-Safe
function.
1. For ABS malfunction, only EBD is activated and condition of vehicle is same condition of vehicles without
ABS function.
NOTE:
In step 1 shown above, self-diagnosis when ignition switch is turned ON and when vehicle starts at initial
time is performed. ABS self-diagnosis noise may be heard as usual.
2. For EBD malfunction, EBD and ABS become inoperative, and condition of vehicle is same as condition of
vehicles without ABS, EBD function.
How to Perform Trouble Diagnosis for Quick and Accurate Repair AFS002LX
INTRODUCTION
q To perform trouble diagnosis, it is the most important to have understanding about vehicle systems (con-
trol and mechanism) thoroughly.
q It is also important to clarify customer complaints before inspec-
tion.
First of all, reproduce symptom, and understand it fully.
Ask customer about his/her complaints carefully. In some cases,
it will be necessary to check symptom by driving vehicle with
customer.
NOTE:
Customers are not professionals. Do not assume "maybe cus-
tomer means..." or "maybe customer mentioned this symptom".
EFJ0028D
q It is essential to check symptoms right from beginning in order to
repair a malfunction completely.
For an intermittent malfunction, it is important to reproduce
symptom based on interview with customer and past examples.
Do not perform inspection on ad hoc basis. Most intermittent
malfunctions are caused by poor contacts. In this case, it will be
effective to shake suspected harness or connector by hand.
When repairs are performed without any symptom check, no
one can judge if malfunction has actually been eliminated.
q After diagnosis, make sure to perform "erase memory". Refer to
BRC-19, "ERASE MEMORY" . SEF233G
q For an intermittent malfunction, move harness or harness con-
nector by hand to check poor contact or false open circuit.
q Always read "GI section" to confirm general precautions. Refer to GI-4, "General Precautions" .
Revision: 2006 July BRC-8 2006 X-Trail
TROUBLE DIAGNOSIS
[ABS]
DIAGNOSIS FLOW CHART
A
B
C
D
E
BRC
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PFIA0701E
Revision: 2006 July BRC-9 2006 X-Trail
TROUBLE DIAGNOSIS
[ABS]
ASKING COMPLAINTS
q Complaints vary depending on the person. It is important to clar-
ify the customer's actual remarks.
q Ask the customer about what symptoms are present and under
what conditions. Use the information to reproduce the symptom
while driving.
q It is also important to use diagnosis sheet so as not to miss vital
information.
SBR339B
EXAMPLE OF DIAGNOSIS SHEET
LFIA0176E
Revision: 2006 July BRC-10 2006 X-Trail
TROUBLE DIAGNOSIS
[ABS]
Component Parts Location AFS002LY
A
B
C
D
E
BRC
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SFIA2391E
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Revision: 2006 July BRC-11 2006 X-Trail
TROUBLE DIAGNOSIS
[ABS]
Schematic AFS002LZ
TFWB0019E
Revision: 2006 July BRC-12 2006 X-Trail
TROUBLE DIAGNOSIS
[ABS]
Wiring Diagram -- ABS -- AFS002M0
A
B
C
D
E
BRC
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TFWB0020E
Revision: 2006 July BRC-13 2006 X-Trail
TROUBLE DIAGNOSIS
[ABS]
TFWB0003E
Revision: 2006 July BRC-14 2006 X-Trail
TROUBLE DIAGNOSIS
[ABS]
A
B
C
D
E
BRC
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TFWB0021E
Revision: 2006 July BRC-15 2006 X-Trail
TROUBLE DIAGNOSIS
[ABS]
TFWB0022E
Revision: 2006 July BRC-16 2006 X-Trail
TROUBLE DIAGNOSIS
[ABS]
Control Unit Input/Output Signal Standard AFS002M1
REFERENCE VALUE FROM CONSULT-II A
CAUTION:
The display shows the control unit calculation data, so a normal value might be displayed even in the
event the output circuit (harness) is open or short - circulated. B
Data monitor
Reference values Reference: Inspection
Data monitor item Display item
Condition in normal opera- item C
tion
Vehicle stopped 0 [km/h]
FR LH SENSOR Wheel speed calcu-
Nearly matches D
FR RH SENSOR lated using signals
the speedometer BRC-25, "Wheel Sensor"
RR LH SENSOR from all four wheel Vehicle running (Note 1)
RR RH SENSOR sensors display (◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo