2003 NISSAN X-TRAIL sensor

BRC-42
[4WD/ABS]
TROUBLE DIAGNOSIS
2. Check using the active test function of the CONSULT-II.
Using active test mode of CONSULT-II, supply current to the 4WD solenoid valve and check that the mon-
itor current becomes close to this supply current.
lThe 4WDcontrol unit is normal when the difference between 4WD solenoid valve current and the monitor
current is within±10%.
It is necessary to inspect the electronically controlled coupling assembly.
TIGHT-CONER BRAKING SYMPTOM OCCURS WHEN THE VEHICLE IS STARTED IN AUTO
WARNING LAMP REMAIN OFF).
1.THROTTLE POSITION SENSOR AND HARNESS INSPECTION
Check accelerator pedal stroke.
OK or NG
OK >> Perform self-diagnosis again.
NG >> Malfunctioning throttle position sensor harness
4WD ACTUATOR RELAY (4WD SOLENOID ACTUATOR RELAY) TURNS ON/OFF FREQUENTLY
1.SELF-DIAGNOSIS RESULT IS 4WD ACTUATOR RELAY (4WD SOLENOID ACTUATOR RELAY) ON
ERROR AND OFF ERROR.
Is self-diagnosis result [ON error and OFF error]?
OK or NG
OK >> GO TO 2.
NG >> Repair or replace as necessary.
2.4WD ACTUATOR RELAY (4WD SOLENOID ACTUATOR RELAY) AND HARNESS INSPECTION
Is self-diagnosis result [ON error and OFF error]?
OK or NG
OK >> Perform self-diagnosis again.
NG >> Malfunctioning 4WD actuator relay (4WD solenoid actuator relay) harness
ABS warning lamp does not illuminate. (ABS warning lamp does not come on
when the ignition switch is turned ON.)
EFS001BP
lReplace the combination meter control unit.
ABS warning lamp illuminates with ignition ON, but does not illuminates after a
few seconds. (ABS warning lamp has illuminated.)
EFS001BQ
1.4WD/ABS CONTROL MODULE CONNECTOR CONNECTION INSPECTION
lRemove glove box on the passenger side and check 4WD/ABS control module connector for proper con-
nection.
Is inspection result OK?
YES >> Proceed to 2. (4WD/ABS control unit connector is properly connected.)
NO >>
lConnect the 4WD/ABS control unit connector and perform inspection again.
2.USING CONSULT, PERFORM SELF-DIAGNOSIS.
lConnect the CONSULT and perform self-diagnosis.
Is inspection result OK?
YES >> GO TO 3. (No self-diagnosis malfunction indicated.)
NO >> Perform inspection according to the trouble codes displayed on the CONSULT. Refer to the “DTC
chart”. Example) Monitor value becomes Approx. 1 A for 4WD solenoid current 1 A setting.

BRC-46
[4WD/ABS]
TROUBLE DIAGNOSIS
lStop 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
lInspection of tire air pressure
lWear condition
lCheck size of the front and rear tires. (No excessive difference should be observed.) Refer toGI-46,
"Wheels&Tire s"
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.
lThe 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) harnessAccelerator 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.

BRC-48
[4WD/ABS]
WHEEL SENSORS
WHEEL SENSORS
PFP:47910
Removal and InstallationEFS001C1
CAUTION:
lBe 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.
lWhen removing sensor, avoid rotating it as much as possible. Do not forcibly pull sensor harness.
lWhen 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.
SFIA0042E

G-SENSOR (4WD MODEL ONLY)
BRC-49
[4WD/ABS]
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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 inIP-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

BRC-50
[4WD/ABS]
SENSOR ROTOR
SENSOR ROTOR
PFP:47970
Removal and InstallationEFS001C3
REMOVAL
Front
1. Remove drive shaft. Refer toFAX-11, "REMOVAL"in “FAX Front Axle/Drive Shaft”.
2. Remove sensor rotor from drive shaft. Refer toFAX-13, "
DISASSEMBLY"in “FAX Front axle/Drive shaft
”.
Rear
1. Remove drive shaft. Refer toRAX-9, "Removal"in “RAX Rear Axle/Drive Shaft”.
2. Remove sensor rotor from drive shaft. Refer toRAX-10, "
DISASSEMBLY"in “RAX Rear axle/Drive
shaft”.
INSTALLATION
Front
1. Install sensor rotor to drive shaft. Refer toFA X -1 5 , "ASSEMBLY"in “FAX Front axle/Drive shaft”.
2. Connect drive shaft. Refer toFAX-12, "
INSTALLATION"in “FAX Front Axle/Drive Shaft”.
Rear
1. Install sensor rotor to drive shaft. Refer toRAX-12, "ASSEMBLY"in “RAX Rear axle/Drive shaft”.
2. Connect drive shaft. Refer toRAX-9, "
Installation"in “RAX Rear Axle/Drive Shaft”.

BRC-54
[ESP/TCS/ABS]
ON-VEHICLE SERVICE
ON-VEHICLE SERVICE
PFP:00000
Adjustment of Neutral Position of Steering Angle SensorEFS0019R
lAfter removing/installing or replacing the ESP/TCS/ABS control unit, steering angle sensor, steering com-
ponents, suspension components, and tires, or after adjusting the wheel alignment, make sure to adjust
the neutral position of the steering angle sensor before running the vehicle.
CAUTION:
To adjust the neutral position of the steering 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

ON-VEHICLE SERVICE
BRC-55
[ESP/TCS/ABS]
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4. Touch “START”.
CAUTION:
Do not touch the steering wheel while adjusting the steer-
ing 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

GENERAL INFORMATION
BRC-57
[ESP/TCS/ABS]
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lWhen 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.
lThe 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 speed 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
controlled to the appropriate engine torque.
2. If a wheel spins, the TCS system works same as LSD (Limited Slip Differential) function 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:
lDuring TCS operation, the body and the brake pedal lightly vibrate and the mechanical noise may
be heard. This is a normal condition.
lDepending 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.
lWhen 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 angle sensor and pressure sensor. Using the information from the yaw rate/
side G sensor and wheel speed sensors, ESP judges the driving condition (conditions of understeer 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:
lDuring ESP operation, the body and the brake pedal lightly vibrate and their mechanical noise
may be heard. This is a normal condition.
lIf 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.
lWhen 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.