2001 NISSAN X-TRAIL sensor

BRC-46
[4WD/ABS]
TROUBLE DIAGNOSIS
●Stop the engine. Restart the engine and drive the vehicle at 20 km/h or faster for approximately 200
seconds. Confirm the 4WD warning lamp flashes slowly.
(Check if the value of IMPROPER SIZE TIRE MONITOR is 8 mm or more.)
When the tire size is normal, the value of IMPROPER SIZE TIRE MONITOR will change from 8 mm or
more to 0 - 4 mm (normal condition) after the vehicle is driven 20 km/h or faster for approximately 5
seconds.
2. Tire inspection
●Inspection of tire air pressure
●Wear condition
●Check size of the front and rear tires. (No excessive difference should be observed.) Refer to GI-44,
"Wheels & Tires"
Vehicle Does Not Enter 4WD Mode Even Though 4WD Warning Lamp Is OFF.EFS001BX
1. Check using the data monitor function of the CONSULT.
Perform inspection by the data monitor function of the CONSULT.
–Check if the vehicle operation changes to 2WD, AUTO, and LOCK modes.
–Check current supplied to the E-TS solenoid valve in AUTO mode.
2. Check using the active test function of the CONSULT.
Using active test mode of CONSULT, supply current to the E-TS solenoid valve and check that the monitor
current becomes close to this supply current.
●The 4WD/ABS control unit is normal when the difference between E-TS solenoid valve current and the
monitor current is within ±10%.
It is necessary to inspect the electronically controlled coupling assembly.
Tight-corner Braking Symptom Occurs When The Vehicle Is Started In Auto
Mode (4WD Warning Lamp Remain OFF).
EFS001BY
1. THROTTLE POSITION SENSOR AND HARNESS INSPECTION
Check accelerator pedal stroke.
Is inspection result OK?
YES >> Perform self-diagnosis again.
NO >> Malfunctioning throttle position sensor harness
E-TS Actuator Relay (4WD Solenoid Actuator Relay) Turns ON/OFF Frequently.EFS001BZ
1. SELF-DIAGNOSIS RESULT IS E-TS ACTUATOR RELAY (4WD ACTUATOR RELAY) ON ERROR AND
OFF ERROR
Is self-diagnosis result [ON error and OFF error]?
Is inspection result OK?
YES >> GO TO 2.
NO >> Repair or replace as necessary.
2. E-TS ACTUATOR RELAY (4WD SOLENOID ACTUATOR RELAY) AND HARNESS INSPECTION
Is self-diagnosis result [ON error and OFF error]?
Is inspection result OK?
YES >> Perform self-diagnosis again.
NO >> Malfunctioning E-TS actuator relay (4WD solenoid actuator relay) harness Accelerator pedal not depressed : Approx. 0 A
Accelerator pedal depressed : Approx. 2.8 A
Example) Monitor value becomes Approx. 1 A for E-TS solenoid current 1 A setting.

WHEEL SENSORS
BRC-49
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
WHEEL SENSORSPFP:47910
Removal and InstallationEFS001C1
CAUTION:
●Be careful not to damage sensor edge and rotor tooth. Before removing front or rear wheel hub,
remove wheel speed sensor to avoid sensor wiring damage. Otherwise, sensor may be deacti-
vated.
●When removing sensor, avoid rotating it as much as possible. Do not forcibly pull sensor harness.
●When installing, check sensor pick-up and mounting hole for foreign material such as iron chips.
Check no foreign material has been caught in sensor rotor. Remove any foreign material found.
Tighten mounting bolts and nuts to the specified torque.
SFIA1100E

BRC-50
[4WD/ABS]
G-SENSOR (4WD MODEL ONLY)
G-SENSOR (4WD MODEL ONLY)
PFP:47930
Removal and InstallationEFS001C2
CAUTION:
Be careful not to drop or bump G -sensor because it is sensitive to impact.
1. Remove center console and instrument. Refer to applicable sec-
tion in IP-3, "
INSTRUMENT PANEL ASSEMBLY" .
2. Disconnect G -sensor connector.
3. Remove mounting nuts and remove G -sensor.
Install in the reverse order of removal observing the precautions
above.
SFIA0065E

SENSOR ROTOR
BRC-51
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
SENSOR ROTORPFP:47970
Removal and InstallationEFS001C3
REMOVAL
Front
1. Remove drive shaft. Refer to FA X - 11 , "REMOVAL" in “FAX Front Axle/Drive Shaft”.
2. Remove sensor rotor from drive shaft. Refer to FAX-13, "
DISASSEMBLY" in “FAX Front axle/Drive shaft
”.
Rear
1. Remove drive shaft. Refer to RAX-9, "Removal" in “RAX Rear Axle/Drive Shaft”.
2. Remove sensor rotor from drive shaft. Refer to RAX-10, "
DISASSEMBLY" in “RAX Rear axle/Drive
shaft”.
INSTALLATION
Front
1. Install sensor rotor to drive shaft. Refer to FAX-15, "ASSEMBLY" in “FAX Front axle/Drive shaft”.
2. Connect drive shaft. Refer to FAX-12, "
INSTALLATION" in “FAX Front Axle/Drive Shaft”.
Rear
1. Install sensor rotor to drive shaft. Refer to RAX-12, "ASSEMBLY" in “RAX Rear axle/Drive shaft”.
2. Connect drive shaft. Refer to RAX-9, "
Installation" in “RAX Rear Axle/Drive Shaft”.

ON-VEHICLE SERVICE
BRC-57
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
ON-VEHICLE SERVICEPFP:00000
Adjustment of Neutral Position of Steering Wheel Angle SensorEFS0019R
●After removing/installing or replacing the ESP/TCS/ABS control unit, steering wheel angle sensor, steer-
ing components, suspension components, and tires, or after adjusting the wheel alignment, make sure to
adjust the neutral position of the steering wheel angle sensor before running the vehicle.
CAUTION:
To adjust the neutral position of the steering wheel angle sensor, make sure to use CONSULT-II.
(Adjustment cannot be done other than CONSULT-II.)
1. Stop the vehicle with the front wheels in the straight-ahead position.
2. Connect CONSULT-II to data link connector on the vehicle, and
turn the ignition switch to ON position (engine not running).
3. Touch “START”, “ABS”, “WORK SUPPORT” and “ST ANGLE
SENSOR ADJUSTMENT” on the CONSULT-II screen in this
order.
PBIB0196E
SFIA0364E
SFIA0365E
SFIA0370E

BRC-58
[ESP/TCS/ABS]
ON-VEHICLE SERVICE
4. Touch “START”.
CAUTION:
Do not touch the steering wheel while adjusting the steer-
ing wheel angle sensor.
5. After approximately 10 seconds, touch “END”. (After approxi-
mately 60 seconds, it ends automatically.)
6. Turn the ignition switch OFF, then turn it ON again.
CAUTION:
Make sure to carry out the above operation.
7. Run the vehicle with the front wheels in the straight-ahead posi-
tion, then stop.
8. Select “DATA MONITOR“, “ECU INPUT SIGNALS” on the CON-
SULT-II screen. Then check that the “ST ANGLE SIG” is within
0±2.5deg. If the value is more than the specification, repeat
steps 1 to 5.
9. Erase the memory of ESP/TCS/ABS control unit and ECM.
10. Turn the ignition switch OFF.
SFIA0371E
SFIA0365E

BRC-60
[ESP/TCS/ABS]
GENERAL INFORMATION
●When starting the engine, or just after starting the vehicle, 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.
TCS FunctionsEFS0019V
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.
3. During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.
CAUTION:
●During TCS operation, the body and the brake pedal lightly vibrate and the mechanical noise may
be heard. This is a normal condition.
●Depending on road circumstances, the driver may have a sluggish feel. This is not abnormal,
because the optimum traction has the highest priority by TCS operation.
●When the vehicle is passing through a road where the surface friction coefficient varies, down-
shifting or depressing the accelerator pedal fully may activate TCS temporarily.
ESP FunctionsEFS0019W
1. The Electronic Stability Program is called the ESP for short.
The ESP is indicated as the VDC (the Vehicle Dynamics Control) on the CONSULT-II screen.
2. In addition to the ABS/TCS function, ESP detects the driver's steering operation amount and brake opera-
tion amount from the steering wheel angle sensor and pressure sensor. Using the information from the
yaw rate and side G sensor and wheel sensors, ESP judges the driving condition (conditions of under-
steer and oversteer) to improve the stability by controlling the brake on 4 wheels and engine output.
3. During ESP operation, the SLIP indicator lamp flashes to inform the driver of the operation.
CAUTION:
●During ESP operation, the body and the brake pedal lightly vibrate and their mechanical noise
may be heard. This is a normal condition.
●If the 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 the engine on a
normal 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, the 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 the
ABS warning lamp, ESP OFF indicator lamp, and SLIP indicator lamp turn OFF after the restart, it
is normal.

BRC-62
[ESP/TCS/ABS]
CAN COMMUNICATION
CAN COMMUNICATION
PFP:23710
System DescriptionEFS002AW
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.
FOR A/T MODELS
System diagram
Input/output signal chart
T: Transmit R: Receive
FOR M/T MODELS
System diagram
Input/output signal chart
T: Transmit R: Receive
SKIA0884E
Signals ECM TCM
Engine coolant temperature signal T R
Accelerator pedal position signal T R
A/T self-diagnosis signal R T
SKIA0885E
Signals ECMSteering wheel
angle sensor4WD control unitESP/ TCS / ABS
control unit
Engine speed signal T R R
Accelerator pedal position signal T R
ESP operation signal R R T
TCS operation signal R R T
ABS operation signal R R T
Stop lamp switch signalRT
Steering wheel angle sensor signal T R
ESP-OFF switch signalRT