2003 NISSAN X-TRAIL brake rotor

PB-8
PARKING BRAKE SHOE

5. After assembly, be sure that each part is installed properly.
6. Fix disc rotor with wheel nut, and adjust brake shoe clearance.
Remove adjusting hole plug. Turn star wheel on until disc rotor
locks. Then turn star wheel in the opposite direction for 6
notches.
7. Rotate disc rotor to be sure that there is no drag. Then install
adjusting hole plug.
8. Adjust parking brake cable.
CAUTION:
If brake shoes were replaced with new ones. Carry out break-in
operation.
SBR048C
SBR097CA

BRC-1
BRAKE CONTROL SYSTEM
F BRAKES
CONTENTS
C
D
E
G
H
I
J
K
L
M
SECTION
A
B
BRC

BRAKE CONTROL SYSTEM
ABS
PRECAUTIONS .......................................................... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
Precautions for Brake System .................................. 4
Precautions for Brake Control .................................. 4
PREPARATION ........................................................... 5
Special Service Tools ............................................... 5
SYSTEM DESCRIPTION ............................................ 6
System Diagram ....................................................... 6
ABS Function ........................................................... 6
EBD Function ........................................................... 6
Fail-Safe Function .................................................... 6
ABS, EBD SYSTEM .............................................. 6
Hydraulic Circuit Diagram ........................................ 7
CAN COMMUNICATION ............................................ 8
System Description .................................................. 8
CAN Communication Unit ........................................ 8
TYPE 1 .................................................................. 8
TYPE 2 .................................................................. 9
TROUBLE DIAGNOSIS .............................................11
How to Proceed With Diagnosis .............................. 11
BASIC CONCEPT ................................................ 11
DIAGNOSIS FLOWCHART ................................ 12
ASKING COMPLAINTS ...................................... 13
EXAMPLE OF DIAGNOSIS SHEET ................... 13
Component Parts Location ..................................... 14
Schematic .............................................................. 15
Wiring Diagram — ABS — ..................................... 16
Control Unit Input/Output Signal Standard ............. 24
REFERENCE VALUE FROM CONSULT-II ......... 24
CONSULT- II Functions .......................................... 25
CONSULT-II MAIN FUNCTION ........................... 25
CONSULT-II BASIC OPERATION PROCEDURE
... 25
SELF-DIAGNOSIS .............................................. 27
DATA MONITOR ................................................. 29
ACTIVE TEST ..................................................... 31
Correct and Quick Diagnosis ................................. 33DIAGNOSIS PRECAUTIONS ............................. 33
Basic Inspection ..................................................... 34
BASIC INSPECTION 1 BRAKE FLUID AMOUNT,
LEAKS, AND BRAKE PADS INSPECTION ......... 34
BASIC INSPECTION 2 POWER SYSTEM TER-
MINAL LOOSENESS AND BATTERY INSPEC-
TION .................................................................... 34
BASIC INSPECTION 3 ABS WARNING LAMP ... 34
Inspection 1: Wheel Sensor System ....................... 35
INSPECTION PROCEDURE .............................. 35
Inspection 2: ABS Actuator and Electric Unit (Con-
trol Unit) 1 ............................................................... 37
Inspection 3: ABS Actuator and Electric Unit (Con-
trol Unit) Power Supply and Ground Circuit ............ 37
Inspection 4: ABS Actuator Relay or ABS Motor
Relay Power System .............................................. 38
Inspection 5: ABS Actuator and Electric Unit (Con-
trol Unit) 2 ............................................................... 39
Inspection 6: G Sensor System .............................. 40
Inspection 7: CAN Communication System ............ 42
Symptom 1: ABS Works Frequently ....................... 42
Symptom 2: Unexpected Pedal Reaction ............... 43
Symptom 3: Longer Stopping Distance .................. 43
Symptom 4: ABS Does Not Work ........................... 44
Symptom 5: Pedal Vibration and ABS Operation
Noise ...................................................................... 44
WHEEL SENSORS ................................................... 45
Removal and Installation ........................................ 45
REMOVAL ........................................................... 45
INSTALLATION ................................................... 45
G SENSOR ................................................................ 46
Removal and Installation ........................................ 46
SENSOR ROTOR ..................................................... 47
Removal and Installation ........................................ 47
REMOVAL ........................................................... 47
INSTALLATION ................................................... 47
ABS ACTUATOR AND ELECTRIC UNIT (ASSEM-
BLY) ........................................................................... 48
Removal and Installation ........................................ 48

BRC-2
ESP/TCS/ABS
PRECAUTIONS ......................................................... 49
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................. 49
Precautions for Brake System ................................ 49
Precautions for Brake Control ................................ 49
PREPARATION ......................................................... 50
Special Service Tools ............................................. 50
ON-VEHICLE SERVICE ............................................ 51
Adjustment of Steering Angle Sensor Neutral Posi-
tion .......................................................................... 51
SYSTEM DESCRIPTION .......................................... 52
System Diagram ..................................................... 52
ESP Function .......................................................... 52
TCS Function .......................................................... 52
ABS Function .......................................................... 53
EBD Function ......................................................... 53
Fail-Safe Function .................................................. 53
ESP/ TCS SYSTEM ............................................ 53
ABS, EBD SYSTEM ............................................ 53
Hydraulic Circuit Diagram ....................................... 54
CAN COMMUNICATION ........................................... 55
System Description ................................................. 55
CAN Communication Unit ....................................... 55
TYPE 3/TYPE4 .................................................... 55
TYPE 5 ................................................................ 56
TROUBLE DIAGNOSIS ............................................ 58
How to Proceed With Diagnosis ............................. 58
BASIC CONCEPT ............................................... 58
DIAGNOSIS FLOWCHART ................................. 59
ASKING COMPLAINTS ....................................... 60
EXAMPLE OF DIAGNOSIS SHEET .................... 60
Component Parts and Harness Connector Location ... 61
Schematic ............................................................... 62
Wiring Diagram —ESP/TCS/ABS— ..................... 63
LHD MODEL ........................................................ 63
RHD MODEL ....................................................... 69
Control Unit Input/Output Signal Standard .............. 75
REFERENCE VALUE FROM CONSULT-II ......... 75
CONSULT-II Functions ........................................... 77
CONSULT-II MAIN FUNCTION ........................... 77
CONSULT-II BASIC OPERATION PROCEDURE
... 77
SELF-DIAGNOSIS .............................................. 79
DATA MONITOR .................................................. 81
ACTIVE TEST ..................................................... 84
For Fast and Accurate Diagnosis ........................... 86
PRECAUTIONS FOR DIAGNOSIS ..................... 86
Basic Inspection ..................................................... 87
BASIC INSPECTION 1 BRAKE FLUID AMOUNT,
LEAKS, AND BRAKE PADS INSPECTION ......... 87
BASIC INSPECTION 2 POWER SYSTEM TER-
MINAL LOOSENESS AND BATTERY INSPEC-
TION .................................................................... 87
BASIC INSPECTION 3 ABS WARNING LAMP,
ESP OFF INDICATOR LAMP, SLIP INDICATOR
LAMP AND BRAKE WARNING LAMP INSPEC-TION .................................................................... 88
Inspection 1 Wheel Sensor System ........................ 89
INSPECTION PROCEDURE ............................... 89
Inspection 2 Engine System ................................... 91
Inspection 3 ESP/TCS/ABS Control Unit System ... 91
Inspection 4 Pressure Sensor and the Circuit
between Pressure Sensor and ESP/TCS/ABS Con-
trol Unit. ................................................................... 91
Inspection 5 Steering Angle Sensor and Circuit
between Steering Angle Sensor and ESP/TCS/ABS
Control Unit. ............................................................ 93
Inspection 6 Yaw Rate/Side G sensor and the Circuit
between Yaw Rate/Side G sensor and ESP/TCS/
ABS Control Unit. .................................................... 95
Inspection 7 Solenoid Valve, ESP Switch-over Sole-
noid Valve and Circuit ............................................. 96
Inspection 8 Actuator Motor, Motor Relay and Circuit
... 99
Inspection 9 Actuator Relay and Circuit ................101
Inspection 10 Stop Lamp Switch and Circuit .........103
Inspection 11 ESP/TCS/ABS Control Unit Power
Supply Circuit ........................................................103
Inspection 12 When “EMERGENCY BRAKE” is
indicated in the Self-Diagnosis Results .................105
Inspection 13 When “ST ANG SEN SIGNAL” is Indi-
cated in the Self-Diagnosis Results ......................105
Inspection 14 Brake Fluid Level of Reservoir Tank,
Communication Circuit between ESP/TCS/ABS
Control Unit and Brake Fluid Level Warning Switch .106
Inspection 15 CAN Communication Circuit, ESP/
TCS/ABS Control Unit and Steering Angle Sensor .107
Component Check ................................................107
ESP OFF SWITCH ............................................107
ESP RELAY BOX ...............................................107
ESP ACTUATOR ...............................................108
Symptom 1: ABS Works Frequently. .....................110
Symptom 2: Unexpected Pedal Action .................110
Symptom 3: Longer Stopping Distance ................. 111
Symptom 4: ABS Does Not Work. ........................112
Symptom 5: Pedal Vibration and Noise ................112
Symptom 6: ESP OFF Indicator Lamp Does Not Illu-
minate ...................................................................113
Symptom 7: SLIP Indicator Lamp Does Not Illumi-
nate .......................................................................114
Symptom 8: Vehicle Jerks During ESP/TCS/ABS
Control ..................................................................114
WHEEL SENSORS .................................................116
Removal and 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 .......................................119

BRC-28
[ABS]
TROUBLE DIAGNOSIS

Display Item List
Suspect Systems Malfunction detecting condition Inspection system
RR RH SENSOR-1 When the circuit in the rear RH wheel sensor is open.
BRC-35, "
Inspection 1:
Wheel Sensor Sys-
tem"(Note 1) RR LH SENSOR-1 When the circuit in the rear LH wheel sensor is open.
FR RH SENSOR-1 When the circuit in the front RH wheel sensor is open.
FR LH SENSOR-1 When the circuit in the front LH wheel sensor is open.
FR LH SENSOR-2When the circuit in the front LH wheel sensor is short-circuited.
Or when the sensor power voltage is outside the standard. When
the distance between the wheel sensor and sensor rotor is too
large and the sensor pulse cannot be recognized by the control
unit.
RR RH SENSOR-2When the circuit in the rear RH wheel sensor is short-circuited.
Or when the sensor power voltage is outside the standard. When
the distance between the wheel sensor and sensor rotor is too
large and the sensor pulse cannot be recognized by the control
unit.
FR RH SENSOR-2When the circuit in the front RH wheel sensor is short-circuited.
Or when the sensor power voltage is outside the standard. When
the distance between the wheel sensor and sensor rotor is too
large and the sensor pulse cannot be recognized by the control
unit.
RR LH SENSOR-2When the circuit in the rear LH wheel sensor is short-circuited. Or
when the sensor power voltage is outside the standard. When
the distance between the wheel sensor and sensor rotor is too
large and the sensor pulse cannot be recognized by the control
unit.
MAIN RELAYWhen the control unit detects an error in the actuator relay sys-
tem.BRC-38, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
FR LH IN ABS SOLWhen the control unit detects an error in the front left inlet sole-
noid system.
BRC-38, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
FR LH OUT ABS SOLWhen the control unit detects an error in the front left outlet sole-
noid system.
RR RH IN ABS SOLWhen the control unit detects an error in the rear right inlet sole-
noid system.
RR RH OUT ABS SOLWhen the control unit detects an error in the rear right outlet sole-
noid system.
FR RH IN ABS SOLWhen the control unit detects an error in the front right inlet sole-
noid system.
FR RH OUT ABS SOLWhen the control unit detects an error in the front right outlet
solenoid system.
RR LH IN ABS SOLWhen the control unit detects an error in the rear left inlet sole-
noid system.
RR LH OUT ABS SOLWhen the control unit detects an error in the rear left outlet sole-
noid system.
LOW POWER VOLTAGEWhen the ABS actuator and electric unit power voltage is lower
than normal. BRC-37, "
Inspection 3:
ABS Actuator and Elec-
tric Unit (Control Unit)
Power Supply and
Ground Circuit"
EMERGENCY BRAKEWhen the ABS actuator and electric unit malfunctions (pressure
increase is too much or too little).BRC-39, "
Inspection 5:
ABS Actuator and Elec-
tric Unit (Control Unit) 2"
ABS CONTROLLERWhen there is an internal error in the ABS actuator and electric
unit.BRC-37, "
Inspection 2:
ABS Actuator and Elec-
tric Unit (Control Unit) 1"

BRC-42
[ABS]
TROUBLE DIAGNOSIS

OK or NG
OK >> ABS actuator and electric unit (control unit) malfunction. Replace ABS actuator and electric unit
(control unit).
NG >> G sensor malfunction. Replace G sensor.
Inspection 7: CAN Communication SystemEFS004HI
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector, and check
the terminal for deformation, disconnection, looseness, and so on. If there is a malfunction, repair or
replace the terminal.
2. Reconnect connector to perform self-diagnosis.
Is
“CAN COMM CIRCUIT” displayed in the self-diagnosis display items?
YES >> Print out the self-diagnostic results, and refer to LAN-4, "CAN Communication Unit" .
NO >> Connector terminal connector is loose, damaged, open, or shorted.
Symptom 1: ABS Works FrequentlyEFS004HJ
1. CHECK START
Check longitudinal brake force distribution using a brake tester.
OK or NG
OK >> GO TO 2.
NG >> Check brake system.
2. CHECK FRONT AND REAR AXLE
Check to make sure that there is no excessive play in the front and rear axles. Refer to Front: FAX-7, "
On-
Vehicle Inspection" , Rear: RAX-6, "On-Vehicle Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Repair.
3. CHECK WHEEL SENSOR AND SENSOR ROTOR
Check wheel sensor and sensor rotor for the following.

Sensor installation for damage

Sensor rotor installation for damage

Sensor connector engagement

Sensor harness
OK or NG
OK >> GO TO 4.
NG >>

Replace wheel sensor or sensor rotor.

Repair harness.
4. CHECK ABS WARNING LAMP DISPLAY
Make sure that the warning lamp turns off approximately 1 second after the key switch is turned on or when
driving.
OK or NG
OK >> Normal
NG >> Perform self-diagnosis. Refer to BRC-27, "
SELF-DIAGNOSIS" .

BRC-44
[ABS]
TROUBLE DIAGNOSIS

Symptom 4: ABS Does Not WorkEFS004HM
CAUTION:
ABS does not operate when speed is 10 km/h or lower.
1. CHECK ABS WARNING LAMP DISPLAY
Make sure that the warning lamp turns off approximately 1 second after the key switch is turned on or when
driving.
OK or NG
OK >> GO TO 3. Check wheel sensor and sensor rotor in BRC-42, "Symptom 1: ABS Works Frequently"
.
NG >> Perform self-diagnosis. Refer to BRC-27, "
SELF-DIAGNOSIS" .
Symptom 5: Pedal Vibration and ABS Operation NoiseEFS004HN
CAUTION:
Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly
depressed (just place a foot on it). However, this is normal.

When shifting gears

When driving on slippery road

During cornering at high speed

When passing over bumps or grooves (Approx. 50 mm or more)

When pulling away just after starting engine (Approx. 10 km/h or more)
1. SYMPTOM CHECK 1
Check if pedal vibration or operation sounds occur when the engine is started.
OK or NG
OK >> GO TO 2.
NG >> Perform self-diagnosis. Refer to BRC-27, "
SELF-DIAGNOSIS" .
2. SYMPTOM CHECK 2
Check symptoms when electrical component (headlamps, etc.) Switches are operated.
Do symptoms occur?
YES >> Check if there is a radio, antenna, antenna lead wire, or wiring close to the control unit. If there is,
move it farther away.
NG >> GO TO 3. Check wheel sensor and sensor rotor in BRC-42, "
Symptom 1: ABS Works Frequently"
.

PRECAUTIONS
BRC-49
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

[ESP/TCS/ABS]PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EFS004H7
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:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Brake SystemEFS0019O

Recommended fluid is brake fluid “DOT 3” or “DOT 4”.

Never reuse drained brake fluid.

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.

Never use mineral oils such as gasoline or kerosene. They will ruin rubber parts of hydraulic system.

Use a flare nut wrench when removing and installing brake
tubes.

When installing brake piping, be sure to check torque.

Before working, turn the ignition switch OFF and disconnect the
connectors for the ESP actuator and control unit or the battery
negative terminal.

Burnish the brake pad contact surfaces after refinishing or
replacing drums or rotors, after replacing pads or linings, or if a
soft pedal occurs at very low mileage. Refer to BR-31, "
BRAKE
BURNISHING PROCEDURE" .
WARNING:
Clean brakes with a vacuum dust collector to minimize risk of health hazard from powder caused
by friction.
Precautions for Brake ControlEFS0019P

During the ESP/TCS/ABS operation, the brake pedal vibrates lightly and its mechanical noise may be
heard. This is a normal condition.

Just after starting the vehicle after ignition switch ON, the brake pedal may vibrate or the motor operating
noise may be heard from the engine compartment. This is a normal status of the operation check.

The stopping distance may be longer than that of vehicles without ABS when the vehicle drives on rough,
gravel, or snowy (fresh deep snow) road.

If a malfunction is indicated by the ABS warning lamp, or other warning lamps, collect the necessary infor-
mation from the customer (what symptoms are present under what conditions) and find out the possible
causes before starting the service. Besides the electrical system inspection, check the booster operation,
brake fluid level, and oil leaks.

If the tyre size and type are used in a improper combination, or the brake pads are not NISSAN genuine
parts, the stopping distance or steering stability may deteriorate.

If there is a radio, antenna, or antenna lead-in wire (including wiring) near the control unit, the ESP/TCS/
ABS function may have a malfunction or error.

If aftermarket parts (e.g. Car stereo equipment, CD player) have been installed, check harnesses for
pinches, open, and improper wiring.
SBR820BA

BRC-110
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

Actuator operation check
1. Connect 9 and 10 terminals of actuator to 40 and 41 terminals of
relay box.
2. Measure the motor voltage (No.4 terminal to body earth) with
oscilloscope. Then check the motor reverse voltage occasioned
time.
The motor reverse voltage occasioned time is more than 0.1
sec.
CAUTION:

Perform checking of motor relay unit. Then confirm that
relay functions.

Driving actuator motor is with in 4 sec. to prevent heating
up.

Standard condition of the motor reverse voltage occa-
sioned time is: Battery voltage is 12V. Temperature 20°.
when the battery voltage or temperature is lower than the
standard, the motor reverse voltage occasioned time
becomes slightly shorter.
Symptom 1: ABS Works Frequently.EFS001AS
Inspection procedure
1. INSPECTION START
Check the wheel sensor system.

Sensor mounting inspection

Sensor pick-up inspection for iron chips

Sensor rotor inspection (e.g. Number of teeth, damaged teeth)

Sensor connector engagement inspection
Is inspection result OK?
YES >> GO TO 2.
NO >> Refer to wheel sensor and rotor lines.
2. LOOSENESS INSPECTION
Check front axle for looseness.
Is inspection result OK?
YES >>BRC-110, "Symptom 2: Unexpected Pedal Action"
NO >> Axle inspection and repair
Symptom 2: Unexpected Pedal ActionEFS001AT
Inspection procedure
1. BRAKE PEDAL STROKE INSPECTION
Check the brake pedal stroke.
Is the stroke excessively long?
YES >> Check the bleeding and brake system.
NO >> GO TO 2.
SFIA1824E