Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan X-Trail 2005 2006 Approved 2005 BRC
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BRAKE CONTROL SYSTEM
F BRAKES
A
SECTION
BRAKE CONTROL SYSTEM
BRC B
C
D
E
CONTENTS
ABS DISPLAY ITEM LIST .......................................... 20 . BRC
Data Monitor .......................................................... 21
.
PRECAUTIONS ......................................................... 4 . OPERATION PROCEDURE ............................... 21 .
Precautions for Supplemental Restraint System DISPLAY ITEM LIST .......................................... 22 . G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Active Test ............................................................. 23
.
SIONER" ................................................................. 4
. OPERATION PROCEDURE ............................... 23 .
Precautions for Brake System ................................. 4 . SOLENOID VALVE ............................................. 23 .
Precautions for Brake Control ................................. 4 . H
ABS MONITOR .................................................. 24 .
PREPARATION .......................................................... 5. For Fast and Accurate Diagnosis .......................... 24 .
Commercial Service Tools ....................................... 5 . PRECAUTIONS FOR DIAGNOSIS .................... 24 .
SYSTEM DESCRIPTION ........................................... 6 . Basic Inspection .................................................... 25 . I
System Diagram ...................................................... 6. BASIC INSPECTION 1: BRAKE FLUID LEVEL,
Functions ................................................................. 6
. LEAKAGE AND BRAKE PAD ............................. 25 .
ABS ...................................................................... 6
. BASIC INSPECTION 2: POWER SUPPLY CIR- J
EBD ...................................................................... 6
. CUIT TERMINAL LOOSENESS AND BATTERY 25 ...
Operation That Is Not "System Error" ..................... 6 . BASIC INSPECTION 3: INSPECTION OF ABS
ABS ...................................................................... 6
. WARNING LAMP ............................................... 25 .
Fail-Safe Function ................................................... 6
. K
Inspection 1: Wheel Sensor Circuit ....................... 26 .
ABS, EBD ............................................................. 6
. INSPECTION PROCEDURE ............................. 26 .
Hydraulic Circuit Diagram ....................................... 7 . Inspection 2: ABS Actuator and Electric Unit (Con-
CAN COMMUNICATION ........................................... 8 . trol Unit) ................................................................. 28
. L
System Description ................................................. 8 . Inspection 3: ABS Actuator and Electric Unit (Con-
TROUBLE DIAGNOSIS ............................................. 9 . trol Unit) Power Supply and Ground Circuit ........... 28 .
How to Perform Trouble Diagnosis for Quick and Inspection 4: ABS Actuator Relay or ABS Motor M
Accurate Repair ...................................................... 9
. Relay Power Circuit ............................................... 29 .
INTRODUCTION .................................................. 9 . Inspection 5: G Sensor Circuit (Only AWD Models) 30 ...
DIAGNOSIS FLOW CHART .............................. 10 . Inspection 6: CAN Communication Circuit ............ 32 .
ASKING COMPLAINTS ......................................11 . Component Inspection ........................................... 33 .
EXAMPLE OF DIAGNOSIS SHEET ...................11 . PARKING BRAKE SWITCH ............................... 33 .
Component Parts Location .................................... 12 . BRAKE FLUID LEVEL SWITCH ........................ 33 .
Schematic ............................................................. 13
. Symptom 1: Excessive ABS Function Operation
Wiring Diagram ..................................................... 14. Frequency .............................................................. 33
.
Control Unit Input/Output Signal Standard ............ 18 . Symptom 2: Unexpected Pedal Reaction .............. 34 .
REFERENCE VALUE FROM CONSULT-II ........ 18 . Symptom 3: The Stopping Distance Is Long ......... 34 .
CONSULT-II Functions .......................................... 19 . Symptom 4: ABS Function Does Not Operate ...... 35 .
CONSULT-II MAIN FUNCTION .......................... 19 . Symptom 5: Pedal Vibration or ABS Operation
CONSULT-II BASIC OPERATION PROCEDURE Sound Occurs ........................................................ 35 .
... 19 Symptom 6: ABS Warning Lamp Indication Is Not
Self-Diagnosis ....................................................... 19
. Normal ................................................................... 35
.
OPERATION PROCEDURE .............................. 19 .
ERASE MEMORY .............................................. 20 .
Revision: 2005 March BRC-1 2005 X-Trail
WHEEL SENSORS .................................................. 36 . EXAMPLE OF DIAGNOSIS SHEET ...................50 .
Removal and Installation ....................................... 36 . Component Parts Location ....................................51 .
COMPONENTS .................................................. 36 . Schematic ..............................................................52.
REMOVAL .......................................................... 36
. Wiring Diagram -- VDC -- ....................................53 .
INSTALLATION ................................................... 36
. Control Unit Input/Output Signal Standard .............59 .
SENSOR ROTOR ..................................................... 37. REFERENCE VALUE FROM CONSULT-II .........59 .
Removal and Installation (2WD Model) ................. 37 . CONSULT-II Functions ..........................................61 .
REMOVAL .......................................................... 37
. CONSULT-II MAIN FUNCTION ..........................61 .
INSTALLATION ................................................... 37
. CONSULT-II BASIC OPERATION PROCEDURE
Removal and Installation (AWD Model) ................. 37 . ...62
REMOVAL .......................................................... 37
. Self-Diagnosis ........................................................62 .
INSTALLATION ................................................... 37
. OPERATION PROCEDURE ...............................62 .
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)... 38 ERASE MEMORY ...............................................63 .
Removal and Installation ....................................... 38 . DISPLAY ITEM LIST ...........................................63 .
COMPONENTS .................................................. 38 . Data Monitor ..........................................................65 .
REMOVAL .......................................................... 39
. OPERATION PROCEDURE ...............................65 .
INSTALLATION ................................................... 39
. DISPLAY ITEM LIST ...........................................65 .
G SENSOR ............................................................... 40
. Active Test ..............................................................67
.
Removal and Installation (Only AWD Models) ....... 40 . OPERATION PROCEDURE ...............................67 .
REMOVAL .......................................................... 40
. SOLENOID VALVE .............................................68 .
INSTALLATION ................................................... 40
. ABS MOTOR ......................................................68 .
For Fast and Accurate Diagnosis ...........................69 .
VDC/TCS/ABS PRECAUTIONS FOR DIAGNOSIS ....................69 .
Basic Inspection .....................................................70 .
PRECAUTIONS ........................................................ 41 . BASIC INSPECTION 1: BRAKE FLUID LEVEL,
Precautions for Supplemental Restraint System LEAKAGE AND BRAKE PAD .............................70 .
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- BASIC INSPECTION 2: POWER SUPPLY CIR-
SIONER" ................................................................ 41. CUIT TERMINAL LOOSENESS AND BATTERY...70
Precautions for Brake System ............................... 41 . BASIC INSPECTION 3: ABS WARNING LAMP,
Precautions for Brake Control ............................... 41 . BRAKE WARNING LAMP, VDC OFF INDICATOR
PREPARATION ........................................................ 42 . LAMP, AND SLIP INDICATOR LAMP .................70 .
Commercial Service Tools ..................................... 42 . Inspection 1: Wheel Sensor Circuit ........................71 .
ON-VEHICLE SERVICE ........................................... 43 . INSPECTION PROCEDURE ..............................71 .
Adjustment of Steering Angle Sensor Neutral Posi- Inspection 2: Engine System .................................73 .
tion ......................................................................... 43
. Inspection 3: VDC/TCS/ABS Control Unit Circuit ...73
SYSTEM DESCRIPTION ......................................... 44 . Inspection 4: Pressure Sensor Circuit ....................73 .
System Diagram .................................................... 44 . Inspection 5: Steering Angle Sensor Circuit ...........75 .
Functions ............................................................... 44
. Inspection 6: Yaw Rate/Side G Sensor Circuit .......77 .
ABS .................................................................... 44
. Inspection 7: Solenoid and VDC Switching Valve
EBD .................................................................... 44
. Circuit .....................................................................79
.
ABLS (ACTIVE BRAKE LSD) ............................. 44 . Inspection 8: Actuator Motor and Motor Relay Circuit
TCS .................................................................... 44
. ...81
VDC .................................................................... 45
. Inspection 9: Actuator Relay Circuit .......................83 .
Operation That Is Not "System Error" .................... 45 . Inspection 10: Stop Lamp Switch Circuit ................85 .
ABS .................................................................... 45
. Inspection 11: VDC/TCS/ABS Control Unit Power
TCS .................................................................... 45
. And Ground Circuit ................................................86 .
VDC .................................................................... 45
. Inspection 12: Park/Neutral Position (PNP) Switch
Fail-Safe Function ................................................. 45 . System (Only A/T Model) .......................................87 .
ABS, EBD, ABLS ................................................ 45 . Inspection 13: Brake Fluid Level Switch Circuit .....88 .
VDC/TCS ............................................................ 46 . Inspection 14: CAN Communication Circuit ...........89 .
Hydraulic Circuit Diagram ...................................... 46 . Component Inspection ...........................................89 .
CAN COMMUNICATION .......................................... 47 . VDC OFF SWITCH .............................................89 .
System Description ................................................ 47 . PARKING BRAKE SWITCH ................................90 .
TROUBLE DIAGNOSIS ........................................... 48 . BRAKE FLUID LEVEL SWITCH .........................90 .
How to Perform Trouble Diagnosis For Quick and MOTOR RELAY AND ACTUATOR RELAY ........90 .
Accurate Repair ..................................................... 48 . VDC ACTUATOR ................................................91 .
INTRODUCTION ................................................ 48 . Symptom 1: Excessive ABS Function Operation
DIAGNOSIS FLOW CHART ............................... 49 . Frequency ..............................................................91.
ASKING COMPLAINTS ...................................... 50 . Symptom 2: Unexpected Pedal Reaction ..............92 .
Revision: 2005 March BRC-2 2005 X-Trail
Symptom 3: The Stopping Distance Is Long ......... 92 . VDC/TCS/ABS CONTROL UNIT ............................. 98 .
Symptom 4: ABS Function Does Not Operate ...... 93 . Removal and Installation ....................................... 98 . A
Symptom 5: Pedal Vibration or ABS Operation REMOVAL .......................................................... 98
.
Sound Occurs ....................................................... 93 . INSTALLATION .................................................. 98.
Symptom 6: Vehicle Jerks During VDC/TCS/ABS ACTUATOR .............................................................. 99
. B
Control ................................................................... 93
. Removal and Installation ....................................... 99 .
Symptom 7: ABS Warning Lamp Indication Is Not COMPONENTS .................................................. 99 .
Normal ................................................................... 94
. REMOVAL ........................................................ 100
.
Symptom 8: Slip Indicator Lamp Indication Is Not INSTALLATION ................................................ 100 . C
Normal ................................................................... 94
. G SENSOR ............................................................. 101
.
Symptom 9: VDC OFF Indicator Lamp Indication Is Removal and Installation ..................................... 101 .
Not Normal ............................................................ 95
. REMOVAL ........................................................ 101
. D
Symptom 10: Brake Warning Lamp Indication Is Not INSTALLATION ................................................ 101 .
Normal ................................................................... 95
. STEERING ANGLE SENSOR ............................... 102 .
WHEEL SENSORS .................................................. 96 . Removal and Installation ..................................... 102 . E
Removal and Installation ....................................... 96 . REMOVAL ........................................................ 102
.
COMPONENTS ................................................. 96 . INSTALLATION ................................................ 102 .
REMOVAL .......................................................... 96 . VDC OFF SWITCH ................................................. 103 .
INSTALLATION .................................................. 96 . Removal and Installation ..................................... 103 . BRC
SENSOR ROTOR .................................................... 97 . REMOVAL ........................................................ 103
.
Removal and Installation ....................................... 97 . INSTALLATION ................................................ 103 .
REMOVAL .......................................................... 97 . G
INSTALLATION .................................................. 97 .
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Revision: 2005 March BRC-3 2005 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".
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
negative terminal.
q When installing brake piping, be sure to check torque.
WARNING: SBR686C
Clean brakes with a vacuum dust collector to minimize risk of
health hazard from powder caused by friction.
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: 2005 March BRC-4 2005 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: 2005 March BRC-5 2005 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 Distributor 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.
Fail-Safe Function AFS002LU
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.
Revision: 2005 March BRC-6 2005 X-Trail
SYSTEM DESCRIPTION
[ABS]
Hydraulic Circuit Diagram AFS002LV
A
B
C
D
E
BRC
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SFIA2479E I
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Revision: 2005 March BRC-7 2005 X-Trail
CAN COMMUNICATION
[ABS]
CAN COMMUNICATION PFP:23710
System Description AFS002PX
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. Refer to LAN-16, "CAN
Communication Unit" .
Revision: 2005 March BRC-8 2005 X-Trail
TROUBLE DIAGNOSIS
[ABS]
TROUBLE DIAGNOSIS PFP:00004
A
How to Perform Trouble Diagnosis for Quick and Accurate Repair AFS002LX
INTRODUCTION
q Most important point to perform diagnosis is to understand systems (control and mechanism) in vehicle B
thoroughly.
q It is also important to clarify customer complaints before inspec-
tion.
First of all, reproduce symptom, and understand it fully. C
Ask customer about his/her complaints carefully. In some cases,
it will be necessary to check symptom by driving vehicle with
customer. D
NOTE:
Customers are not professionals. Do not assume "maybe cus-
tomer means..." or "maybe customer mentioned this symptom". E
EFJ0028D
BRC
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. G
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. H
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-20, "ERASE MEMORY" . I
SEF233G
q For an intermittent malfunction, move harness or harness con-
nector by hand to check poor contact or false open circuit.
J
q Always read "GI section" to confirm general precautions. Refer to GI-4, "General Precautions" .
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Revision: 2005 March BRC-9 2005 X-Trail
TROUBLE DIAGNOSIS
[ABS]
DIAGNOSIS FLOW CHART
SFIA0953E
Revision: 2005 March BRC-10 2005 X-Trail
TROUBLE DIAGNOSIS
[ABS]
ASKING COMPLAINTS
q Complaints vary depending on the person. It is important to clar- A
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 B
while driving.
q It is also important to use diagnosis sheet so as not to miss vital
information. C
SBR339B
D
EXAMPLE OF DIAGNOSIS SHEET
E
BRC
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LFIA0176E
Revision: 2005 March BRC-11 2005 X-Trail
TROUBLE DIAGNOSIS
[ABS]
Component Parts Location AFS002LY
SFIA2391E
Revision: 2005 March BRC-12 2005 X-Trail
TROUBLE DIAGNOSIS
[ABS]
Schematic AFS002LZ
A
B
C
D
E
BRC
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TFWB0019E
Revision: 2005 March BRC-13 2005 X-Trail
TROUBLE DIAGNOSIS
[ABS]
Wiring Diagram AFS002M0
TFWB0020E
Revision: 2005 March BRC-14 2005 X-Trail
TROUBLE DIAGNOSIS
[ABS]
A
B
C
D
E
BRC
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TFWB0003E
Revision: 2005 March BRC-15 2005 X-Trail
TROUBLE DIAGNOSIS
[ABS]
TFWB0021E
Revision: 2005 March BRC-16 2005 X-Trail
TROUBLE DIAGNOSIS
[ABS]
A
B
C
D
E
BRC
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TFWB0022E
Revision: 2005 March BRC-17 2005 X-Trail
TROUBLE DIAGNOSIS
[ABS]
Control Unit Input/Output Signal Standard AFS002M1
REFERENCE VALUE FROM CONSULT-II
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.
Data monitor
Reference values Reference: Inspection
Data monitor item Display item
Condition in normal opera- item
tion
Vehicle stopped 0 [km/h]
FR LH SENSOR Wheel speed calcu-
FR RH SENSOR lated using signals Nearly matches BRC-26, "Inspection 1:
RR LH SENSOR from all four wheel the speedometer Wheel Sensor Circuit"
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