2005 NISSAN X-TRAIL brake sensor

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-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-25
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

Control Unit Input/Output Signal StandardEFS004GA
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.
Note 1: Confirm tyre pressure is normal.
Note 2: ABS warning lamp ON/OFF timing
ON: For approximately 1 second after the ignition switch is turned on or when an malfunction is detected.
OFF: Approximately 1 second after the ignition switch is turned on (when system is normal).Monitor item Display ContentData monitor
Reference: Inspection
checklist
ConditionReference values
for normal opera-
tion
FR LH SENSOR
FR RH SENSOR
RR LH SENSOR
RR RH SENSORWheel speed calcu-
lated using signals
from all four wheel
sensorsVehicle stopped 0 km/h (0 MPH)
BRC-36, "
Inspection 1:
Wheel Sensor System"While driving (Note 1)Nearly matches
the speedometer
display (± 10% or
less)
DOCILE G-SEN. 1
DOCILE G-SEN. 2
(4WD model)Fore-and-aft G
detected by G sensorWhen vehicle is stopped on
level groundOFF
BRC-41, "
Inspection 6: G
Sensor System"When G sensor is tilted toward
the front with G sensor mount-
ing bolt removedON
ABS IN SOL
ABS OUT SOLOperation status of all
solenoidsWhen the actuator solenoid
operates or during a fail-safeON
BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
When the actuator relay oper-
ates and the actuator solenoid
does not operateOFF
STOP LAMP SW Brake pedal operationBrake pedal depressed ON
Stop lamp switch circuit
Brake pedal not depressed OFF
MOTOR RELAYMotor and motor relay
operation statusWhen the motor relay and
motor are operatingON
BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
When the motor relay and
motor are not operatingOFF
ACTUATOR RELAYActuator relay opera-
tion statusWhen the actuator relay is
operatingOFF
When the actuator relay is not
operatingON
ABS WARN LAMPABS warning lamp on
condition (Note 2)ABS warning lamp ON ONBRC-35, "
BASIC
INSPECTION 3 ABS
WARNING LAMP"ABS warning lamp OFF OFF
BATTERY VOLTBattery voltage sup-
plied to ABS actuator
and electric unit (con-
trol unit) Ignition switch ON 10 - 16VBRC-38, "
Inspection 3:
ABS Actuator and Elec-
tric Unit (Control Unit)
Power Supply and
Ground Circuit"
EBD FAIL SIG
ABS FAIL SIGFail signal statusEBD Fail
ABS FailON
EBD system
ABS system EBD normal
ABS normalOFF
EBD SIGNAL
ABS SIGNALEBD operation
ABS operationEBD active
ABS activeON
EBD not active
ABS not activeOFF

TROUBLE DIAGNOSIS
BRC-29
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

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-36, "
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 malfunction in the actuator relay
system.BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
FR LH IN ABS SOLWhen the control unit detects an malfunction in the front left inlet
solenoid system.
BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
FR LH OUT ABS SOLWhen the control unit detects an malfunction in the front left out-
let solenoid system.
RR RH IN ABS SOLWhen the control unit detects an malfunction in the rear right inlet
solenoid system.
RR RH OUT ABS SOLWhen the control unit detects an malfunction in the rear right out-
let solenoid system.
FR RH IN ABS SOLWhen the control unit detects an malfunction in the front right
inlet solenoid system.
FR RH OUT ABS SOLWhen the control unit detects an malfunction in the front right out-
let solenoid system.
RR LH IN ABS SOLWhen the control unit detects an malfunction in the rear left inlet
solenoid system.
RR LH OUT ABS SOLWhen the control unit detects an malfunction in the rear left outlet
solenoid system.
LOW POWER VOLTAGEWhen the ABS actuator and electric unit power voltage is lower
than normal. BRC-38, "
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-40, "
Inspection 5:
ABS Actuator and Elec-
tric Unit (Control Unit) 2"
ABS CONTROLLERWhen there is an internal malfunction in the ABS actuator and
electric unit.BRC-38, "
Inspection 2:
ABS Actuator and Elec-
tric Unit (Control Unit) 1"

TROUBLE DIAGNOSIS
BRC-43
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

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 BRC-8, "CAN COMMUNICATION" .
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, "WHEEL BEARING INSPECTION" (2WD), RAX-10, "REAR WHEEL
BEARING" (4WD).
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-28, "
SELF-DIAGNOSIS" .

BRC-44
[ABS]
TROUBLE DIAGNOSIS

Symptom 2: Unexpected Pedal ReactionEFS004HK
1. CHECK BRAKE PEDAL STROKE
Check brake pedal stroke. Refer to BR-6, "
On-Vehicle Inspection and Adjustment" .
Is the stroke too large?
YES >>
Bleed air from the brake piping. Refer to BR-9, "Bleeding Brake System" .

Check brake pedal, brake booster, and master cylinder for mount play, looseness, brake sys-
tem fluid leakage, etc. Repair if necessary. Refer to Brake pedal: BR-7, "
Components" , brake
booster and master cylinder: BR-23, "
Removal and Installation" .
NO >> GO TO 2.
2. PERFORMANCE CHECK
Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. Check if braking force is
normal in this condition. Connect connector after inspection.
OK or NG
OK >> GO TO 3. Wheel Sensor Inspection in BRC-43, "Symptom 1: ABS Works Frequently" .
NG >> Check brake system.
Symptom 3: Longer Stopping DistanceEFS004HL
CAUTION:
The stopping distance on slippery road surfaces might be longer with the ABS operating than when
the ABS is not operating.
1. PERFORMANCE CHECK
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS.
In this condition, check stopping distance. After inspection, connect connector.
OK or NG
OK >> GO TO BRC-43, "Symptom 1: ABS Works Frequently" .
NG >>

Bleed air from the brake piping. Refer to BR-9, "Bleeding Brake System" .

Check brake system.

TROUBLE DIAGNOSIS
BRC-45
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

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-43, "Symptom 1: ABS Works Frequently"
.
NG >> Perform self-diagnosis. Refer to BRC-28, "
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-28, "
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-43, "
Symptom 1: ABS Works Frequently"
.

SYSTEM DESCRIPTION
BRC-53
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

SYSTEM DESCRIPTIONPFP:00000
System DiagramEFS0019X
ESP FunctionEFS0019W
1. The Electronic Stability Program is called the ESP for short. ESP is indicated as ESP on CONSULT-II
screen.
2. In addition to the ABS/TCS function, ESP detects a driver's steering operation amount and brake opera-
tion amount from steering angle sensor and pressure sensor. Using the information from yaw rate/side G
sensor and wheel sensors, ESP judges the driving condition (conditions of understeer and oversteer) to
improve the stability by controlling brake on 4 wheels and engine output.
3. During ESP operation, SLIP indicator lamp flashes to inform the driver of the operation.
CAUTION:

During ESP operation, body and the brake pedal lightly vibrate and their mechanical noise may be
heard. This is a normal condition.

If vehicle is rotated on a turn table, or rolled and rocked on a ship, the ABS warning lamp,
ESP OFF indicator lamp, and SLIP indicator lamp may turn on. In this case, start engine on a nor-
mal road again. If the ABS warning lamp, ESP OFF indicator lamp, and SLIP indicator lamp turn
off after the restart, it is normal.

When driving in a steep slope such as a bank, ABS warning lamp, ESP OFF indicator lamp, and
SLIP indicator lamp may turn on. In this case, start the engine on a normal road again. If ABS
warning lamp, ESP OFF indicator lamp, and SLIP indicator lamp turn off after the restart, it is nor-
mal.
TCS FunctionEFS0019V
1. With the wheel sensor signals from 4 wheels, the ESP/TCS/ABS control unit detects a wheel spin. If a
wheel spins, the control unit controls brake fluid pressure to the spinning wheel, and cuts the fuel to the
engine. It also closes the throttle valve to reduce the engine torque. Furthermore, throttle position is con-
trolled to the appropriate engine torque.
2. If a wheel spins, the TCS system works and function by applying brake fluid pressure to the spinning
wheel.
SFIA2012E