Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Nissan Xterra 2005-2007.2009 Approved Nissan Xterra 2005 BRC
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F BRAKES
A
B
SECTION
BRAKE CONTROL SYSTEM C
D
E
CONTENTS
ABS Control Unit Input/Output Signal Standard ............ 22 . BRC
REFERENCE VALUE FROM CONSULT-II ........ 22 .
PRECAUTIONS ......................................................... 5
. CONSULT-II Function (ABS) ................................. 24 .
Precautions for Supplemental Restraint System CONSULT-II BASIC OPERATION PROCEDURE G
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- ... 24
SIONER" ................................................................. 5
. SELF-DIAGNOSIS ............................................. 25 .
Precautions for Brake System ................................. 5 . DATA MONITOR ................................................ 27 .
Precautions When Using CONSULT-II .................... 5 . H
ACTIVE TEST .................................................... 28 .
CHECK POINTS FOR USING CONSULT-II ........ 5 . TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
Precautions for Brake Control ................................. 6 . ITEMS ....................................................................... 30
.
Precautions for CAN System .................................. 6 . Wheel Sensor System ........................................... 30 . I
Wiring Diagrams and Trouble Diagnosis ................. 7 . ABS Control Unit Inspection .................................. 31 .
PREPARATION .......................................................... 8
. Solenoid Valve System Inspection ........................ 32 .
Special Service Tool ................................................ 8
. Actuator Motor, Motor Relay, and Circuit Inspection 33 ... J
Commercial Service Tools ....................................... 8 . ABS Control Unit Power and Ground Systems
SYSTEM DESCRIPTION ........................................... 9 . Inspection .............................................................. 34
.
System Components ............................................... 9 . CAN Communication System Inspection ............... 34 .
ABS Function .......................................................... 9
. K
TROUBLE DIAGNOSES FOR SYMPTOMS ........... 35 .
EBD Function .......................................................... 9
. ABS Works Frequently .......................................... 35 .
Fail-Safe Function ................................................... 9
. Unexpected Pedal Action ...................................... 36 .
ABS/EBD SYSTEM .............................................. 9 . Long Stopping Distance ......................................... 37 . L
Hydraulic Circuit Diagram ..................................... 10 . ABS Does Not Work .............................................. 37 .
CAN COMMUNICATION ..........................................11 . Pedal Vibration or ABS Operation Noise ............... 37 .
System Description ................................................11
. ABS Warning Lamp Does Not Come On When Igni- M
TROUBLE DIAGNOSIS ........................................... 12 . tion Switch Is Turned On ....................................... 38 .
How to Perform Trouble Diagnoses for Quick and ABS Warning Lamp Stays On When Ignition Switch
Accurate Repair .................................................... 12
. Is Turned On .......................................................... 38
.
INTRODUCTION ................................................ 12 . WHEEL SENSORS .................................................. 39 .
WORK FLOW ..................................................... 13. Removal and Installation ....................................... 39 .
CLARIFY CONCERN ......................................... 14 . REMOVAL .......................................................... 39.
EXAMPLE OF DIAGNOSIS SHEET .................. 14 . INSTALLATION .................................................. 39 .
Component Parts and Harness Connector Location 15 ... SENSOR ROTOR .................................................... 40 .
Schematic ............................................................. 16
. Removal and Installation ....................................... 40 .
Wiring Diagram -- ABS -- .................................... 17 . FRONT ............................................................... 40
.
Basic Inspection .................................................... 21
. REAR (C200) ..................................................... 40 .
BRAKE FLUID LEVEL, FLUID LEAK, AND REAR (M226) ..................................................... 40 .
BRAKE PAD INSPECTION ................................ 21 . ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)... 41
POWER SYSTEM TERMINAL LOOSENESS Removal and Installation ....................................... 41 .
AND BATTERY INSPECTION ........................... 21 . REMOVAL .......................................................... 41.
ABS WARNING LAMP INSPECTION ................ 21 . INSTALLATION .................................................. 42 .
Warning Lamp and Indicator Timing ..................... 22 .
Revision: February 2006 BRC-1 2005 Xterra
ABLS/ABS Actuator Motor, Motor Relay, and Circuit Inspection...75
Stop Lamp Switch System Inspection ....................76 .
PRECAUTIONS ........................................................ 43 . ABS/ABLS Control Unit Power and Ground Sys-
Precautions for Supplemental Restraint System tems Inspection ......................................................77
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Brake Fluid Level Switch System Inspection .........78 .
SIONER" ................................................................ 43. Pressure Sensor System Inspection ......................78 .
Precautions for Brake System ............................... 43 . CAN Communication System Inspection ...............80 .
Precautions When Using CONSULT-II .................. 43 . TROUBLE DIAGNOSES FOR SYMPTOMS ............81 .
CHECK POINTS FOR USING CONSULT-II ....... 43 . ABS Works Frequently ...........................................81 .
Precautions for Brake Control ............................... 44 . Unexpected Pedal Action .......................................82 .
Precautions for CAN System ................................. 44 . Long Stopping Distance .........................................83 .
Wiring Diagrams and Trouble Diagnosis ............... 45 . ABS Does Not Work ..............................................83 .
PREPARATION ........................................................ 46 . Pedal Vibration or ABS Operation Noise ...............83 .
Special Service Tool .............................................. 46 . ABS Warning Lamp Does Not Come On When Igni-
Commercial Service Tools ..................................... 46 . tion Switch Is Turned On ........................................84 .
SYSTEM DESCRIPTION ......................................... 47 . ABS Warning Lamp Stays On When Ignition Switch
System Components ............................................. 47 . Is Turned On ..........................................................84
.
ABS Function ......................................................... 48 . WHEEL SENSORS ..................................................85 .
EBD Function ........................................................ 48 . Removal and Installation ........................................85 .
ABLS Function ....................................................... 48 . REMOVAL ...........................................................85
.
Fail-Safe Function ................................................. 48 . INSTALLATION ...................................................85 .
ABS/EBD SYSTEM ............................................ 48 . SENSOR ROTOR .....................................................86 .
ABLS SYSTEM ................................................... 48 . Removal and Installation ........................................86 .
Hydraulic Circuit Diagram ...................................... 49 . FRONT ................................................................86
.
CAN COMMUNICATION .......................................... 50 . REAR (C200) ......................................................86
.
System Description ................................................ 50 . REAR (M226) ......................................................86
.
TROUBLE DIAGNOSIS ........................................... 51 . ACTUATOR AND ELECTRIC UNIT (ASSEMBLY) ...87
How to Perform Trouble Diagnoses for Quick and Removal and Installation ........................................87 .
Accurate Repair ..................................................... 51 . REMOVAL ...........................................................87
.
INTRODUCTION ................................................ 51 . INSTALLATION ...................................................88 .
WORK FLOW ..................................................... 52 .
CLARIFY CONCERN ......................................... 53 .
EXAMPLE OF DIAGNOSIS SHEET ................... 53 .
VDC/TCS/ABS
Component Parts and Harness Connector Location 54 ... PRECAUTIONS ........................................................89.
Schematic .............................................................. 55. Precautions for Supplemental Restraint System
Wiring Diagram -- ABLS -- .................................. 56 . (SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
Basic Inspection .................................................... 60 . SIONER" ................................................................89
.
BRAKE FLUID LEVEL, FLUID LEAK, AND Precautions for Brake System ...............................89 .
BRAKE PAD INSPECTION ................................ 60 . Precautions When Using CONSULT-II ..................89 .
POWER SYSTEM TERMINAL LOOSENESS CHECK POINTS FOR USING CONSULT-II .......89 .
AND BATTERY INSPECTION ............................ 60 . Precautions for Brake Control ................................90 .
ABS WARNING LAMP AND SLIP INDICATOR Precautions for CAN System .................................91 .
LAMP INSPECTION ........................................... 60 . Wiring Diagrams and Trouble Diagnosis ................91 .
Warning Lamp and Indicator Timing ...................... 61 . PREPARATION ........................................................92.
Control Unit Input/Output Signal Standard ............. 61 . Special Service Tool ...............................................92
.
REFERENCE VALUE FROM CONSULT-II ........ 61 . Commercial Service Tools .....................................92 .
CONSULT-II Function (ABS) ................................. 64 . SYSTEM DESCRIPTION ..........................................93 .
CONSULT-II BASIC OPERATION PROCEDURE System Components ..............................................93 .
... 64 ABS Function .........................................................94
.
SELF-DIAGNOSIS ............................................. 65 . EBD Function .........................................................94
.
DATA MONITOR ................................................. 68 . TCS Function .........................................................94
.
ACTIVE TEST .................................................... 70 . VDC Function .........................................................94
.
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC Fail-Safe Function ..................................................94
.
ITEMS ....................................................................... 72
. ABS/EBD SYSTEM .............................................95 .
Wheel Sensor System Inspection .......................... 72 . VDC/TCS SYSTEM ............................................95 .
Engine System Inspection ..................................... 73 . Hydraulic Circuit Diagram ......................................95 .
ABS/ABLS Control Unit Inspection ........................ 74 . CAN COMMUNICATION ..........................................96 .
Solenoid and Change-Over Valve System Inspec- System Description ................................................96.
tion ......................................................................... 74
.
Revision: February 2006 BRC-2 2005 Xterra
TROUBLE DIAGNOSIS ........................................... 97 . tion Switch Is Turned On ..................................... 140 .
How to Perform Trouble Diagnoses for Quick and ABS Warning Lamp Stays On When Ignition Switch A
Accurate Repair .................................................... 97. Is Turned On ........................................................ 140 .
INTRODUCTION ................................................ 97 . Vehicle Jerks During TCS/VDC Activation .......... 141 .
WORK FLOW ..................................................... 98 . ON-VEHICLE SERVICE ......................................... 142 . B
CLARIFY CONCERN ......................................... 99 . Adjustment of Steering Angle Sensor Neutral Posi-
EXAMPLE OF DIAGNOSIS SHEET .................. 99 . tion ....................................................................... 142
.
Component Parts and Harness Connector Location 100 . WITH CONSULT-II ........................................... 142 .
Schematic ........................................................... 101
. WITHOUT CONSULT-II .................................... 142 . C
Wiring Diagram -- VDC -- .................................. 102 . Calibration of Decel G Sensor ............................. 142 .
Basic Inspection .................................................. 109. WHEEL SENSORS ................................................ 144 .
BRAKE FLUID LEVEL, FLUID LEAK, AND Removal and Installation ..................................... 144 . D
BRAKE PAD INSPECTION .............................. 109 . REMOVAL ........................................................ 144 .
POWER SYSTEM TERMINAL LOOSENESS INSTALLATION ................................................ 144 .
AND BATTERY INSPECTION ......................... 109 . SENSOR ROTOR .................................................. 145 . E
ABS WARNING LAMP, SLIP INDICATOR LAMP Removal and Installation ..................................... 145 .
AND VDC OFF INDICATOR LAMP INSPECTION 109 . FRONT ............................................................. 145 .
For Fast and Accurate Diagnosis .........................110 . REAR (C200) ................................................... 145 .
PRECAUTIONS FOR DIAGNOSIS ...................110 . REAR (M226) ................................................... 145 . BRC
Warning Lamp and Indicator Timing .................... 111 . ACTUATOR AND ELECTRIC UNIT (ASSEMBLY). 146
Control Unit Input/Output Signal Standard ........... 111 . Removal and Installation ..................................... 146 .
REFERENCE VALUE FROM CONSULT-II ....... 111 . REMOVAL ........................................................ 146 . G
CONSULT-II Function (ABS) ................................114 . INSTALLATION ................................................ 147 .
CONSULT-II BASIC OPERATION PROCEDURE STEERING ANGLE SENSOR ............................... 148 .
..114 Removal and Installation ..................................... 148 . H
SELF-DIAGNOSIS ............................................115 . G SENSOR ............................................................. 149 .
DATA MONITOR ...............................................118 . Removal and Installation ..................................... 149 .
ACTIVE TEST .................................................. 121 . REMOVAL ........................................................ 149 .
I
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC INSTALLATION ................................................ 149 .
ITEMS .................................................................... 123
.
Wheel Sensor System Inspection ....................... 123 . HDC/HSA/VDC/TCS/ABS
Engine System Inspection ................................... 124 . J
ABS/TCS/VDC Control Unit Inspection ............... 125 . PRECAUTIONS ..................................................... 150 .
Steering Angle Sensor System ........................... 125 . Precautions for Supplemental Restraint System
Yaw Rate/Side/Decel G Sensor System Inspection 127 . (SRS) "AIR BAG" and "SEAT BELT PRE-TEN- K
Solenoid and VDC Change-Over Valve System SIONER" .............................................................. 150
.
Inspection ............................................................ 129
. Precautions for Brake System ............................. 150 .
Actuator Motor, Motor Relay, and Circuit Inspection 130 . Precautions When Using CONSULT-II ................ 150 .
L
Stop Lamp Switch System Inspection ................. 131 . CHECK POINTS FOR USING CONSULT-II ..... 150 .
ABS/TCS/VDC Control Unit Power and Ground Precautions for Brake Control ............................. 151 .
Systems Inspection ............................................. 132 . Precautions for CAN System ............................... 152 .
Brake Fluid Level Sensor System Inspection ...... 133 . Wiring Diagrams and Trouble Diagnosis ............. 152 . M
Pressure Sensor System Inspection ................... 133 . PREPARATION ...................................................... 153.
Steering Angle Sensor Safe Mode Inspection ..... 134 . Special Service Tool ............................................ 153.
CAN Communication System Inspection ............ 135 . Commercial Service Tools ................................... 153 .
Inspection For Self-diagnosis Result "ST ANGLE SYSTEM DESCRIPTION ....................................... 154 .
SEN SIGNAL" ..................................................... 135 . System Components ........................................... 154 .
Inspection For Self-diagnosis Result "DECEL G ABS Function ....................................................... 155
.
SEN SET" ............................................................ 136
. EBD Function ...................................................... 155
.
VDC OFF Indicator lamp Does Not Illuminate .... 136 . TCS Function ....................................................... 155
.
Component Inspection ........................................ 136 . VDC Function ...................................................... 155
.
VDC OFF SWITCH .......................................... 136 . HDC Function ...................................................... 155
.
TROUBLE DIAGNOSES FOR SYMPTOMS ......... 137 . HSA Function ...................................................... 156
.
ABS Works Frequently ........................................ 137 . Fail-Safe Function ............................................... 156
.
Unexpected Pedal Action .................................... 138 . ABS/EBD SYSTEM .......................................... 156 .
Long Stopping Distance ...................................... 139 . HDC/HSA SYSTEM ......................................... 156 .
ABS Does Not Work ............................................ 139 . VDC/TCS SYSTEM .......................................... 156 .
Pedal Vibration or ABS Operation Noise ............ 139 . Hydraulic Circuit Diagram .................................... 157 .
ABS Warning Lamp Does Not Come On When Igni-
Revision: February 2006 BRC-3 2005 Xterra
CAN COMMUNICATION ........................................ 158 . Steering Angle Sensor Safe Mode Inspection ..... 202 .
System Description .............................................. 158 . CAN Communication System Inspection ............. 202 .
TROUBLE DIAGNOSIS ......................................... 159 . Inspection For Self-diagnosis Result "ST ANGLE
How to Perform Trouble Diagnoses for Quick and SEN SIGNAL" ...................................................... 203 .
Accurate Repair ................................................... 159 . Inspection For Self-diagnosis Result "DECEL G
INTRODUCTION .............................................. 159 . SEN SET" ............................................................ 203 .
WORK FLOW ................................................... 160 . VDC OFF Indicator lamp Does Not Illuminate ..... 203 .
CLARIFY CONCERN ....................................... 161 . Component Inspection ......................................... 204 .
EXAMPLE OF DIAGNOSIS SHEET ................. 161 . VDC OFF SWITCH ........................................... 204 .
Component Parts and Harness Connector Location 162 . HDS SWITCH ................................................... 204 .
Schematic ............................................................ 163
. TROUBLE DIAGNOSES FOR SYMPTOMS .......... 205 .
Wiring Diagram -- VDC -- .................................. 164 . ABS Works Frequently ......................................... 205 .
Basic Inspection .................................................. 171 . Unexpected Pedal Action ..................................... 206 .
BRAKE FLUID LEVEL, FLUID LEAK, AND Long Stopping Distance ....................................... 207 .
BRAKE PAD INSPECTION .............................. 171 . ABS Does Not Work ............................................ 207 .
POWER SYSTEM TERMINAL LOOSENESS Pedal Vibration or ABS Operation Noise ............. 207 .
AND BATTERY INSPECTION .......................... 171 . ABS Warning Lamp Does Not Come On When Igni-
ABS WARNING LAMP, SLIP INDICATOR LAMP, tion Switch Is Turned On ...................................... 208 .
VDC OFF INDICATOR LAMP AND HDC INDI- ABS Warning Lamp Stays On When Ignition Switch
CATOR LAMP INSPECTION ............................ 171 . Is Turned On ........................................................ 208 .
For Fast and Accurate Diagnosis ........................ 172 . Vehicle Jerks During TCS/VDC Activation ........... 209 .
PRECAUTIONS FOR DIAGNOSIS .................. 172 . Stop Lamp Relay Inspection ................................ 210 .
Warning Lamp and Indicator Timing .................... 173 . HDC Switch Inspection ........................................ 210 .
Control Unit Input/Output Signal Standard ........... 173 . ON-VEHICLE SERVICE ......................................... 212 .
REFERENCE VALUE FROM CONSULT-II ...... 173 . Adjustment of Steering Angle Sensor Neutral Posi-
CONSULT-II Function (ABS) ............................... 177 . tion ....................................................................... 212
.
CONSULT-II BASIC OPERATION PROCEDURE WITH CONSULT-II ............................................ 212 .
. 177 WITHOUT CONSULT-II .................................... 212 .
SELF-DIAGNOSIS ........................................... 178 . Calibration of Decel G Sensor ............................. 212 .
DATA MONITOR ............................................... 181 . WHEEL SENSORS ................................................ 214 .
ACTIVE TEST .................................................. 184 . Removal and Installation ...................................... 214 .
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC REMOVAL ......................................................... 214 .
ITEMS ..................................................................... 187
. INSTALLATION ................................................. 214 .
Wheel Sensor System Inspection ........................ 187 . SENSOR ROTOR ................................................... 215 .
Engine System Inspection ................................... 188 . Removal and Installation ...................................... 215 .
ABS/TCS/VDC Control Unit Inspection ............... 189 . FRONT .............................................................. 215.
Steering Angle Sensor System ............................ 189 . REAR ................................................................ 215
.
Yaw Rate/Side/Decel G Sensor System Inspection 191 . ACTUATOR AND ELECTRIC UNIT (ASSEMBLY) .216
Solenoid and VDC Change-Over Valve System Removal and Installation ...................................... 216 .
Inspection ............................................................ 193
. REMOVAL ......................................................... 216 .
Actuator Motor, Motor Relay, and Circuit Inspection 194 . INSTALLATION ................................................. 217 .
Stop Lamp Switch System Inspection ................. 195 . STEERING ANGLE SENSOR ................................ 218 .
ABS/TCS/VDC Control Unit Power and Ground Removal and Installation ...................................... 218 .
Systems Inspection ............................................. 196 . G SENSOR ............................................................. 219 .
Brake Fluid Level Sensor System Inspection ...... 197 . Removal and Installation ...................................... 219 .
Active Booster System Inspection ....................... 198 . REMOVAL ......................................................... 219 .
Pressure Sensor System Inspection ................... 199 . INSTALLATION ................................................. 219 .
Revision: February 2006 BRC-4 2005 Xterra
PRECAUTIONS
[ABS]
PRECAUTIONS PFP:00001
A
Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EFS005U1
The Supplemental Restraint System such as "AIR BAG" and "SEAT BELT PRE-TENSIONER", used along B
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 C
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: D
G 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. E
G 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. BRC
G 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.
G
Precautions for Brake System EFS005KN
CAUTION:
G Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS" for recommended brake fluid. H
G Never reuse drained brake fluid.
G Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is
splashed on painted areas, wash it away with water immediately. I
G To clean or wash all parts of master cylinder and disc brake caliper, use clean brake fluid.
G Never use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic
J
system.
G Use flare nut wrench when removing and installing brake
tube.
K
G If a brake fluid leak is found, the part must be disassembled
without fail. Then it has to be replaced with a new one if a
defect exists.
G Turn the ignition switch OFF and remove the connector of L
the ABS actuator and electric unit (control unit) or the bat-
tery terminal before performing the work.
G Always torque brake lines when installing. M
G Burnish the brake contact surfaces after refinishing or SBR686C
replacing rotors, after replacing pads, or if a soft pedal
occurs at very low mileage.
Refer to BR-27, "BRAKE BURNISHING PROCEDURE" (front disc brake) or BR-32, "BRAKE BUR-
NISHING PROCEDURE" (rear disc brake).
WARNING:
G Clean brake pads and shoes with a waste cloth, then wipe with a dust collector.
Precautions When Using CONSULT-II EFS005KO
When connecting CONSULT-II to data link connector, connect them through CONSULT-II CONVERTER.
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carries out CAN communication.
CHECK POINTS FOR USING CONSULT-II
1. Has CONSULT-II been used without connecting CONSULT-II CONVERTER on this vehicle?
G If YES, GO TO 2.
Revision: February 2006 BRC-5 2005 Xterra
PRECAUTIONS
[ABS]
G If NO, GO TO 5.
2. Is there any indication other than indications relating to CAN communication system in the self-diagnosis
results?
G If YES, GO TO 3.
G If NO, GO TO 4.
3. Based on self-diagnosis results unrelated to CAN communication, carry out the inspection.
4. Malfunctions may be detected in self-diagnosis depending on control units carrying out CAN communica-
tion. Therefor, erase the self-diagnosis results.
5. Diagnose CAN communication system. Refer to LAN-21, "CAN COMMUNICATION" .
Precautions for Brake Control EFS005KP
G During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.
G During HDC operation, a mechanical noise may be heard. This is normal.
G Just after starting vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check.
G Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
G 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
diagnosis. Besides electrical system inspection, check brake booster operation, brake fluid level, and fluid
leaks.
G If incorrect tire sizes or types are installed on the vehicle or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.
G If there is a radio, antenna or related wiring near control module, ABS function may have a malfunction or
error.
G If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness
pinches, open circuits or improper wiring.
Precautions for CAN System EFS005KQ
G Do not apply voltage of 7.0V or higher to terminal to be measured.
G Maximum open terminal voltage of tester in use must be less than 7.0V.
G Before checking harnesses, turn ignition switch OFF and disconnect battery negative cable.
G Area to be repaired must be soldered and wrapped with tape.
Make sure that fraying of twisted wire is within 110 mm (4.33 in).
PKIA0306E
Revision: February 2006 BRC-6 2005 Xterra
PRECAUTIONS
[ABS]
G Do not make a bypass connection to repaired area. (If the circuit
is bypassed, characteristics of twisted wire will be lost.) A
B
C
PKIA0307E
D
Wiring Diagrams and Trouble Diagnosis EFS005KR
When you read wiring diagrams, refer to the following:
G GI-16, "How to Read Wiring Diagrams". E
G PG-4, "POWER SUPPLY ROUTING CIRCUIT".
When you perform trouble diagnosis, refer to the following:
G GI-12, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES". BRC
G GI-28, "How to Perform Efficient Diagnosis for an Electrical Incident".
G
H
I
J
K
L
M
Revision: February 2006 BRC-7 2005 Xterra
PREPARATION
[ABS]
PREPARATION PFP:00002
Special Service Tool EFS005KS
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number Description
(Kent-Moore No.)
Tool name
-- Checking operation of ABS active wheel
(J-45741) sensors
ABS active wheel sensor tester
WFIA0101E
205-D002 Removing axle shaft bearing
( -- )
Bearing splitter
ZZA0700D
Commercial Service Tools EFS005KT
Tool name Description
1. Flare nut crowfoot Removing and installing brake piping
2. Torque wrench a: 10mm (0.39 in)/12mm (0.47 in)
S-NT360
Revision: February 2006 BRC-8 2005 Xterra
SYSTEM DESCRIPTION
[ABS]
SYSTEM DESCRIPTION PFP:00000
A
System Components EFS005KU
B
C
D
E
BRC
WFIA0360E
G
ABS Function EFS005KV
G The Anti-Lock Brake System detects wheel revolution while braking and improves handling stability during H
sudden braking by electrically preventing wheel lockup. Maneuverability is also improved for avoiding
obstacles.
G If the electrical system malfunctions, the Fail-Safe function is activated, the ABS becomes inoperative and I
the ABS warning lamp turns on.
G The electrical system can be diagnosed using CONSULT-II.
G During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is J
normal.
G Just after starting the vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check. K
G Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
L
EBD Function EFS005KW
G Electronic Brake Distribution is a function that detects subtle slippages between the front and rear wheels
during braking, and it improves handling stability by electronically controlling the brake fluid pressure
M
which results in reduced rear wheel slippage.
G If the electrical system malfunctions, the Fail-Safe function is activated, the EBD and ABS become inoper-
ative, and the ABS warning lamp and brake warning lamp are turned on.
G The electrical system can be diagnosed using CONSULT-II.
G During EBD operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.
G Just after starting the vehicle, the brake pedal may vibrate or a motor operating noise may be heard from
engine compartment. This is a normal status of operation check.
Fail-Safe Function EFS005KX
CAUTION:
If the Fail-Safe function is activated, perform the Self Diagnosis for ABS system.
ABS/EBD SYSTEM
In case of an electrical malfunction with the ABS, the ABS warning lamp will turn on. In case of an electrical
malfunction with the EBD system, the brake warning lamp and the ABS warning lamp will turn on.
The system will revert to one of the following conditions of the Fail-Safe function.
Revision: February 2006 BRC-9 2005 Xterra
SYSTEM DESCRIPTION
[ABS]
1. For ABS malfunction, only the EBD is operative and the condition of the vehicle is the same condition of
vehicles without ABS system.
2. For EBD malfunction, the EBD and ABS become inoperative, and the condition of the vehicle is the same
as the condition of vehicles without ABS or EBD system.
Hydraulic Circuit Diagram EFS005KY
WFIA0369E
1. Inlet solenoid valve 2. Outlet solenoid valve 3. Reservoir
4. Pump 5. Motor 6. Inlet valve
7. Outlet valve 8. Bypass check valve 9. Damper
10. Pressure switch
Revision: February 2006 BRC-10 2005 Xterra
CAN COMMUNICATION
[ABS]
CAN COMMUNICATION PFP:23710
A
System Description EFS005KZ
Refer to LAN-21, "CAN COMMUNICATION" .
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Revision: February 2006 BRC-11 2005 Xterra
TROUBLE DIAGNOSIS
[ABS]
TROUBLE DIAGNOSIS PFP:00000
How to Perform Trouble Diagnoses for Quick and Accurate Repair EFS005L0
INTRODUCTION
The ABS system has an electronic control unit to control major func-
tions. The control unit accepts input signals from sensors and con-
trols actuator operation. It is also important to check for conventional
problems such as air leaks in the booster or lines, lack of brake fluid,
or other problems with the brake system.
It is much more difficult to diagnose a problem that occurs intermit-
tently rather than continuously. Most intermittent problems are
caused by poor electrical connections or faulty wiring. In this case,
careful checking of suspicious circuits may help prevent the replace-
ment of good parts.
A visual check only may not find the cause of the problem, so a road
SEF233G
test should be performed.
Before undertaking actual checks, take just a few minutes to talk with
a customer who approaches with an ABS complaint. The customer
is a very good source of information on such problems, especially
intermittent ones. Through the talks with the customer, find out what
symptoms are present and under what conditions they occur.
Start your diagnosis by looking for "conventional" problems first. This
is one of the best ways to troubleshoot brake problems on an ABS
equipped vehicle. Also check related Service Bulletins for informa-
tion.
SEF234G
Revision: February 2006 BRC-12 2005 Xterra
TROUBLE DIAGNOSIS
[ABS]
WORK FLOW
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LFIA0197E
Revision: February 2006 BRC-13 2005 Xterra
TROUBLE DIAGNOSIS
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CLARIFY CONCERN
G A customer's description of a vehicle concern may vary depend-
ing on the individual. It is important to clarify the customer's con-
cern.
G Ask the customer about what symptoms are present under what
conditions. Use this information to reproduce the symptom while
driving.
G It is also important to use the diagnosis sheet to understand
what type of trouble the customer is having.
SBR339B
EXAMPLE OF DIAGNOSIS SHEET
WFIA0226E
Revision: February 2006 BRC-14 2005 Xterra
TROUBLE DIAGNOSIS
[ABS]
Component Parts and Harness Connector Location EFS005L1
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WFIA0361E
Revision: February 2006 BRC-15 2005 Xterra
TROUBLE DIAGNOSIS
[ABS]
Schematic EFS005L2
WFWA0229E
Revision: February 2006 BRC-16 2005 Xterra
TROUBLE DIAGNOSIS
[ABS]
Wiring Diagram -- ABS -- EFS005L3
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WFWA0230E
Revision: February 2006 BRC-17 2005 Xterra
TROUBLE DIAGNOSIS
[ABS]
WFWA0231E
Revision: February 2006 BRC-18 2005 Xterra
TROUBLE DIAGNOSIS
[ABS]
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