2005 NISSAN X-TRAIL ESP

BRAKE MASTER CYLINDER
BR-17
C
D
E
G
H
I
J
K
L
MA
B
BR

CAUTION:

Do not reuse reservoir tank mounting pin.

Do not reuse reservoir tank.

Be sure to insert pin from the chamfered pinhole on the cylinder body.
MODELS WITHOUT ESP (PISTON STOPPER NOT APPLIED.)
CAUTION:
Remove reservoir tank only when absolutely necessary.
Disassembly (Piston Assembly)
1. Using a flat-bladed screwdriver as shown in the figure, lift up the
tabs on the stopper cap and remove it from the master cylinder.
NOTE:
Remove stopper cap while holding it because the piston in mas-
ter cylinder may pop out.
2. Carefully pull primary piston assembly straight out to prevent the
cylinder inner wall from being damaged.
3. Tap flange using a soft block, such as wood, and carefully pull
secondary piston assembly straight out to prevent cylinder body
inner wall from being damaged.
Inspection After Disassembly (Piston Assembly)
Cylinder body

Check inner wall of cylinder for damage, abrasion, corrosion, and pinholes. Replace the cylinder body if
detected.
Assembly (Piston Assembly)
CAUTION:

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

Make sure there is no foreign matter such as dirt or dust attached to the inner cylinder walls, the
piston, or the cap seal, and use care to avoid damaging parts with the assembly tools.

Do not drop parts. If a part is dropped, do not use it.
1. Apply fluid to cylinder inner wall body and contact surface of the
piston assembly. Then insert secondary piston assembly and
primary piston assembly into cylinder body in this order.
CAUTION:

Pay attention to the orientation of the piston cup, and
insert straight to prevent the cup from being caught by
cylinder inner wall.

Be sure to replace the assembly without disassembling
the new inner kit.

Do not reuse the primary and secondary piston assem-
blies.
BRA0031D
BRA0033D
SFIA2051E

BRAKE MASTER CYLINDER
BR-19
C
D
E
G
H
I
J
K
L
MA
B
BR

3. Tilt reservoir tank as shown in the figure for the mounting pin to
be inserted. Return the reservoir tank to the upright position
when mounting pin passes through pinhole in the cylinder body.
Push mounting pin to the opposite pinhole of the reservoir tank,
so that it is the same condition as the insertion side.
CAUTION:

Be sure to insert pin from the chamfered pinhole of cylin-
der body.

Do not reuse the mounting pin.
MODELS WITH ESP
Disassembly
CAUTION:

While working, cover primary piston rod with cloth to prevent it from being damaged.

Only remove reservoir tank when absolutely necessary.
1. Place the side of cylinder body with chamfering around the pin
insertion hole up, and secure the cylinder body flange section
with a vise as shown in the figure.
CAUTION:
When securing in a vise, use copper plates or cloth to pro-
tect flange.
2. Using a pin punch [commercial service tool: approximately 4
mm (0.16 in) dia.], remove reservoir tank mounting pin.
3. Remove master cylinder assembly from the vise.
4. Remove reservoir tank and grommet from cylinder body.
5. Push in the primary piston and remove stopper pin from the cyl-
inder body secondary-side tank boss hole.
SFIA0342E
BRA0558D
BRA0559D
BRA0560D

BR-24
BRAKE BOOSTER

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 the brake
booster.
2. Check output rod length.
3.
INSTALLATION
1. Loosen lock nut to adjust input rod length so that length “B” (in
the figure) satisfies the specified value.
2. After adjusting “B”, temporarily tighten lock nut to install booster
assembly to vehicle.
3. Connect brake pedal to input rod clevis.
4. Connect brake pedal assembly mounting nuts and tighten to the
specified torque.
5. Connect master cylinder to booster assembly.
6. Adjust brake pedal height and play.
7. Tighten input rod lock nut to the specified torque.
8. Bleed air. Refer to BR-9, "
Bleeding Brake System" . Reference value at vacuum of –66.7 kPa (–500 mmHg,
–19.69 inHg):
Without ESP models : 10.4 mm (0.409 in)
With ESP models : -6.2 mm (-0.244 in)
SBR208E
Length “B” standard : 125 mm (4.92 in)
SGIA0060E

VACUUM LINES
BR-25
C
D
E
G
H
I
J
K
L
MA
B
BR

VACUUM LINESPFP:41920
Removal and InstallationEFS000CE
RHD MODELS
LHD MODELS
CAUTION:

Because vacuum hose contains a check valve, it must be installed in the correct orientation. Refer
to the stamp or label to confirm correct installation. Brake booster will not operate normally if
hose is installed in the wrong direction.
SFIA2093E
1. Vacuum hose 2. Vacuum tube 3. Clip
4. Clamp
SFIA2094E
1. Vacuum hose 2. Clip 3. Clamp

BRC-2 SENSOR ROTOR ...................................................... 48
Removal and Installation ........................................ 48
REMOVAL ........................................................... 48
INSTALLATION .................................................... 48
ABS ACTUATOR AND ELECTRIC UNIT (ASSEM-
BLY) ........................................................................... 49
Removal and Installation ........................................ 49
ESP/TCS/ABS
PRECAUTIONS ......................................................... 50
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................. 50
Precautions for Brake System ................................ 50
Precautions for Brake Control ................................ 50
PREPARATION ......................................................... 51
Special Service Tools ............................................. 51
ON-VEHICLE SERVICE ............................................ 52
Adjustment of Steering Angle Sensor Neutral Posi-
tion .......................................................................... 52
SYSTEM DESCRIPTION .......................................... 53
System Diagram ..................................................... 53
ESP Function .......................................................... 53
TCS Function .......................................................... 53
ABS Function .......................................................... 54
EBD Function ......................................................... 54
Fail-Safe Function .................................................. 54
ESP/ TCS SYSTEM ............................................ 54
ABS, EBD SYSTEM ............................................ 54
Hydraulic Circuit Diagram ....................................... 55
CAN COMMUNICATION ........................................... 56
System Description ................................................. 56
CAN Communication Unit ....................................... 56
TYPE 4/TYPE 5 ................................................... 56
TYPE 6 ................................................................ 57
TYPE 9 ................................................................ 58
TROUBLE DIAGNOSIS ............................................ 60
How to Proceed With Diagnosis ............................. 60
BASIC CONCEPT ............................................... 60
DIAGNOSIS FLOWCHART ................................. 61
ASKING COMPLAINTS ....................................... 62
EXAMPLE OF DIAGNOSIS SHEET .................... 62
Component Parts and Harness Connector Location ... 63
Schematic ............................................................... 64
Wiring Diagram —ESP/TCS/ABS— ..................... 65
LHD MODEL ........................................................ 65
RHD MODEL ....................................................... 71
Control Unit Input/Output Signal Standard .............. 77
REFERENCE VALUE FROM CONSULT-II ......... 77
CONSULT-II Functions ........................................... 79
CONSULT-II MAIN FUNCTION ........................... 79
CONSULT-II BASIC OPERATION PROCEDURE
... 79
SELF-DIAGNOSIS .............................................. 81
DATA MONITOR .................................................. 83
ACTIVE TEST ..................................................... 86
For Fast and Accurate Diagnosis ........................... 88PRECAUTIONS FOR DIAGNOSIS ..................... 88
Basic Inspection ...................................................... 89
BASIC INSPECTION 1 BRAKE FLUID AMOUNT,
LEAKS, AND BRAKE PADS INSPECTION ......... 89
BASIC INSPECTION 2 POWER SYSTEM TER-
MINAL LOOSENESS AND BATTERY INSPEC-
TION .................................................................... 89
BASIC INSPECTION 3 ABS WARNING LAMP,
ESP OFF INDICATOR LAMP, SLIP INDICATOR
LAMP AND BRAKE WARNING LAMP INSPEC-
TION .................................................................... 90
Inspection 1 Wheel Sensor System ........................ 91
INSPECTION PROCEDURE ............................... 91
Inspection 2 Engine System ................................... 93
Inspection 3 ESP/TCS/ABS Control Unit System ... 93
Inspection 4 Pressure Sensor and the Circuit
between Pressure Sensor and ESP/TCS/ABS Con-
trol Unit. ................................................................... 93
Inspection 5 Steering Angle Sensor and Circuit
between Steering Angle Sensor and ESP/TCS/ABS
Control Unit. ............................................................ 95
Inspection 6 Yaw Rate/Side G sensor and the Circuit
between Yaw Rate/Side G sensor and ESP/TCS/
ABS Control Unit. .................................................... 97
Inspection 7 Solenoid Valve, ESP Switch-over Sole-
noid Valve and Circuit ............................................. 98
Inspection 8 Actuator Motor, Motor Relay and Circuit
.101
Inspection 9 Actuator Relay and Circuit ................103
Inspection 10 Stop Lamp Switch and Circuit .........105
Inspection 11 ESP/TCS/ABS Control Unit Power
Supply Circuit ........................................................105
Inspection 12 When “EMERGENCY BRAKE” is
indicated in the Self-Diagnostic Results ................107
Inspection 13 When “ST ANG SEN SIGNAL” is Indi-
cated in the Self-Diagnostic Results .....................107
Inspection 14 Brake Fluid Level of Reservoir Tank,
Communication Circuit between ESP/TCS/ABS
Control Unit and Brake Fluid Level Warning Switch .108
Inspection 15 CAN Communication Circuit, ESP/
TCS/ABS Control Unit and Steering Angle Sensor .109
Component Check ................................................109
ESP OFF SWITCH ............................................109
ESP RELAY BOX ...............................................109
ESP ACTUATOR ...............................................110
Symptom 1: ABS Works Frequently .....................112
Symptom 2: Unexpected Pedal Reaction .............113
Symptom 3: Longer Stopping Distance .................113
Symptom 4: ABS Does Not Work .........................113
Symptom 5: Pedal Vibration and ABS Operation
Noise .....................................................................113
Symptom 6: ESP OFF Indicator Lamp Does Not Illu-
minate ...................................................................114
Symptom 7: SLIP Indicator Lamp Does Not Illumi-
nate .......................................................................114
Symptom 8: Vehicle Jerks During ESP/TCS/ABS
Control ..................................................................115

BRC-3
C
D
E
G
H
I
J
K
L
MA
B
BRC
WHEEL SENSORS ..................................................116
Removal and Installation ....................................... 116
REMOVAL .......................................................... 116
INSTALLATION .................................................. 116
SENSOR ROTOR ....................................................117
Removal and Installation ....................................... 117
REMOVAL .......................................................... 117
INSTALLATION .................................................. 117
ESP/TCS/ABS CONTROL UNIT .............................118
Removal and Installation ....................................... 118
REMOVAL .......................................................... 118
INSTALLATION .................................................. 118
ESP/TCS/ABS ACTUATOR AND RELAY BOX ......119
Removal and Installation ....................................... 119YAW RATE/SIDE G SENSOR .................................120
Removal and Installation ......................................120
REMOVAL .........................................................120
INSTALLATION .................................................120
ESP OFF SWITCH ..................................................121
Removal and Installation ......................................121
REMOVAL .........................................................121
INSTALLATION .................................................121
STEERING ANGLE SENSOR ................................122
Removal and Installation ......................................122
REMOVAL .........................................................122
INSTALLATION .................................................122

BRC-8
[ABS]
CAN COMMUNICATION

CAN COMMUNICATIONPFP:23710
System DescriptionEFS0067G
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.
CAN Communication UnitEFS0067H
TYPE 1/TYPE 2
System diagram
Input/output signal chart
T: Transmit R: Receive Body typeWagon
Axle 4WD 2WD
Engine YD22DDTi QR20DE/QR25DE QR20DE YD22DDTi
Transmission M/T A/T M/T
Brake controlABS
CAN system type 1 2 3 7 8
ECM×××××
TCM×
ESP/TCS/ABS control unit
ABS actuator and electric unit (control unit)×××××
Steering angle sensor
4WD control unit×××
Combination meter×××××
PKIA6458E
Signals ECMABS actuator and
electric unit
(control unit)4WD control unit Combination meter
4WD mode indicator lamp signal T R
4WD warning lamp signalTR

TROUBLE DIAGNOSIS
BRC-39
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

3. CHECK ABS ACTUATOR AND ELECTRIC UNIT POWER SUPPLY AND GROUND CIRCUIT
1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector.
2. Turn ignition switch ON or OFF, and then check continuity and voltage between each connector terminal
and ground.
OK or NG
OK >> Check battery for terminal looseness, low voltage, etc. If
any malfunction is found, repair malfunctioning parts.
NG >> Corresponding harness circuit malfunctions. Repair circuit.
Inspection 4: ABS Actuator Relay or ABS Motor Relay Power SystemEFS004HE
INSPECTION PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results.
Is above displayed on self-diagnosis display?
YES >> GO TO 2.
NO >> INSPECTION ENDSignalABS actuator
and electric unit
(control unit) har-
ness connector
E69GroundMeasure-
ment con-
ditionMea-
sured
value
Power
supply29 (L) —Ignition
switch ONBattery
voltage
(Approx.
12V)
Ignition
switch
OFFApprox.
0V
SFIA2019E
SignalABS actuator and
electric unit (con-
trol unit) harness
connector E69GroundMeasure-
ment con-
ditionMea-
sured
value
Ground 16 (B),30 (B) —Ignition
switch
OFFContinu-
ity
should
exist.
SFIA2020E
Self-diagnostic results
IN ABS SOL
OUT ABS SOL
MAIN RELAY (ACTUATOR RELAY)
PUMP MOTOR