2001 NISSAN X-TRAIL change wheel

BRC-18
[4WD/ABS]
TROUBLE DIAGNOSIS
Trouble Diagnosis Chart by Symptom
EFS001BF
When ABS and 4WD warning lamps illuminate, perform self-diagnosis.
Symptom Condition Check items Reference page
4wd indicator lamp does not come on
for approximately 1 second when the
ignition switch is turned on.IGN-ON
●Blown drive mode indicator lamp bulb
●Blown fuse between ignition and drive mode
indicator lamp
●Open circuit of wiring between ignition and
drive mode indicator lampBRC-42
ABS warning lamp does not illuminate
with ignition ON. (ABS warning lamp
check)IGN-ON
●Blown ABS warning lamp bulb
●Blown fuse between ignition and ABS warning
lamp.
●Open circuit of wiring between ignition and
ABS warning lamp.
●Malfunction in ABS systemBRC-42
ABS warning lamp illuminates with
ignition ON, but does not illuminates
after a few seconds. (ABS warning
lamp has not illuminated.)IGN-ON●4WD/ABS control unit connector discon-
nected
●Malfunction in ABS systemBRC-42
4WD warning lamp does not illuminate
with ignition ON.IGN-ON
●Blown 4WD warning lamp bulb
●Blown fuse between ignition and 4WD warn-
ing lamp
●Open circuit in wire between ignition and 4WD
warning lamp
●Open circuit in wire between 4WD warning
lamp and 4WD actuator relay
●Disconnected 4WD actuator relay
●Open circuit in wire between 4WD actuator
relay and body groundBRC-43
4WD warning lamp does not go out
several seconds after engine is started.
(Drive mode indicator lamp goes out.)Engine running●4WD/ABS control unit connector discon-
nected
●Malfunction present in 4WD systemBRC-43
Heavy tight-corner braking symptom
occurs when vehicle is driven in the fol-
lowing conditions: AUTO mode and
steering wheel is turned fully to either
sides after engine is started (Note 1,
Note 2).●Engine run-
ning
●AUTO mode
●Steering
wheel fully
turned
●Operation is not in AUTO mode (in 2WD or
LOCK mode).
●Throttle position signal error
●Mechanical malfunction of electronically con-
trolled coupling
●Malfunction present in 4WD systemBRC-44
Drive modes cannot be switched after
engine is started.Engine running
●Drive mode change-over switch is discon-
nected.
●Open circuit between drive mode change-over
switch and 4WD /ABS control unit
●Open circuit between drive mode change-over
switch and body groundBRC-45
Vehicle running, 4WD warning lamp
flashes rapidly. (When it flashes for
Approx. One minute, then does not illu-
minate.) Rapid flashing: Two times
flashing per 1 secondEngine running
(to other than
2WD mode)Protection function was activated due to heavy
load to electronically controlled coupling. (4WD
system is not malfunctioning.)BRC-45

TROUBLE DIAGNOSIS
BRC-21
[4WD/ABS]
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NOTE:
1. If a circuit tester for measuring voltage is used for the check, do not forcibly extend any connector termi-
nals.
2. 4WD warning lamp ON/OFF timing
3. ABS warning lamp ON/OFF timing
4. Unit name is indicated by the name used in circuit diagram (4WD solenoid valve). However, it is “E-TS
solenoid” in CONSULT-II data.
Specifications defined by CONSULT-II
CAUTION:
The displayed item is the data calculated by the control unit, so it may indicate a normal value even if
an output circuit (harness is open) is open or shorted.
102
Body ground
4WD solenoid valve
(E-TS solenoid
valve) (Note 4)At vehicle stop engine idlingB a t t e ry v o lta g e ( A p p ro x .
12V)4WD actuator relay
solenoid valve and
harness
18 4WD actuator relay At vehicle stop engine idling 2 V or lower4WD actuator relay
and harness
2 G - sensor power
supply
At ignition switch ON (vehicle horizontal
stop condition)Approx. 8 V
G -sensor and har-
ness
32Longitudinal G -
sensor Approx. 2.5V
41 G -sensor ground Approx. 0V
22Throttle position
sensorWide open throttle
Closed throttleApprox. 4.0 V
Approx. 0.5 VThrottle position
sensor and har-
ness
24Parking brake
switchIn parking position
In other than parking position-Parking brake
switch and harness
26Drive mode
change-over switch
AUTODrive mode change-over switch: 2WD
Drive mode change-over switch: other
than 2WDSW ON: Approx. 0 V
SW OFF: Approx. 5 VDrive mode
change-over switch
and path
27Drive mode
change-over switch
LOCKDrive mode change-over switch: LOCK
Drive mode change-over switch: other
than LOCKSW ON: Approx. 0 V
SW OFF: Approx. 5 VDrive mode
change-over switch
and path
ON : When ignition switch is turned ON (before engine starts) or when malfunction is
detected
OFF : After engine is started (When the system is in normal condition)
ON : When ignition switch is turned ON (before engine starts) or when malfunction is
detected
OFF : After engine is started (When the system is in normal condition)
Te r m i n a l N o .
Location Standard (note 1)(Note) Check
points when result
was malfunctioning +–
Items to be monitored ContentsData monitor
(Reference)
Check points when result
was malfunctioning ConditionReference values in
normal operation
Wheel sensor FR, FL,
RR, RL [km/h (MPH)]Vehicle wheel speedWhen the vehicle is
stopped0 km/h (MPH)
Wheel speed sensor and
harness
While driving (note:1)Almost in accordance
with speedometer dis-
play (within ±10%)
LONGITUDINAL G-
SENSOR (4WD mod-
els)G -sensor operating
conditionWith vehicle stopped
on flat road. plus; 0.15 G G -sensor and harness

TROUBLE DIAGNOSIS
BRC-23
[4WD/ABS]
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NOTE:
1. Check air pressure of tire under normal condition.
2. ABS warning lamp ON/OFF timing
CONSULT-II FunctionsEFS001BH
CONSULT-II FUNCTION APPLICATION TABLE
4WD MODE SWITCH
(ON/OFF)Input condition of drive
mode change-over
switchEngine running, vehicle
stopped, switch
pressed-Drive mode change-over
switch and path
4WD MODE MONITOROutput condition of
drive mode indicator
lamp signalEngine running, vehicle
stoppedUsing drive mode
change-over switchDrive mode indicator
lamp and path
IMPROPER SIZE TIRE
MONITOR (mm)Improper size tire
installed condition- 0 - 4, 4 - 8Front/Rear tire size differ-
ence, wear condition
PARKING BRAKE
SWITCH (ON/OFF)Parking brake switch
operating conditionParking brake
depressedON
Parking brake switch and
harness
Parking brake not
depressedOFF
METER OUTPUT (km/
h)Output condition of
vehicle speed for
speedometerWheel stopped 0 km/h
Speed meter and har-
ness
Vehicle run nin gAlmost in accordance
with the wheel speed
sensor display
ON : When ignition switch is turned ON (before engine starts) or when malfunction is
detected
OFF : After engine is started (When the system is in normal condition)
Items to be monitored ContentsData monitor
(Reference)
Check points when result
was malfunctioning ConditionReference values in
normal operation
Item Self-diagnosis Data monitor Active test
FR RH SENSOR××–
FR LH SENSOR [OPEN]××–
RR RH SENSOR××–
RR LH SENSOR××–
Speed sensor×––
FR RH IN ABS SOL×××
FR RH OUT ABS SOL×××
FR LH IN ABS SOL×××
FR LH OUT ABS SOL×××
RR RH IN ABS SOL×××
RR RH OUT ABS SOL×××
RR LH IN ABS SOL×××
RR LH OUT ABS SOL×××
ABS ACTUATOR RELAY××–
ABS MOTOR RELAY×××
ABS warning lamp –×–
Battery voltage××–
Control module×––
ABS MOTOR×–×
Longitudinal G -sensor××–

TROUBLE DIAGNOSIS
BRC-29
[4WD/ABS]
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ACTIVE TEST
Operation Procedure
CAUTION:
●Do not perform active test wheel running.
●Be sure completely bleed air from brake system.
● Active test cannot be performed with ABS warning lamp on.
1. Connect CONSULT-II to data link connector and start engine.
2. Touch “START” on the display.
3. Touch “ABS”.
4. Touch “ACTIVE TEST”.
5. Test item selection screen is displayed.
6. Touch test item.
7. Touch “START” with “MAIN SIGNALS” line inverted.
8. Active test screen is displayed.
Display Item List
ABS solenoid valve
Touch “UP”, “KEEP” and “DOWN”. Check ABS solenoid valves (inlet/
outlet) operate as the following chart using screen monitor.
*: ON for 1 to 2 seconds after touch, and then OFF
NOTE:
●If active test is performed with brake pedal depressed, pedal
stroke may be changed. This is a normal condition.
●“TEST STOP” is displayed 10 seconds later from the operation
start.
●To perform test again after “TEST STOP” is displayed, repeat
step 6 of operation procedure.
SFIA0394E
Operation Up Keep Down
ABS inlet S/V OFF ON ON
ABS outlet S/V OFF OFF ON*
SFIA0395E
SFIA0396E

TROUBLE DIAGNOSIS
BRC-41
[4WD/ABS]
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4WD MODES CANNOT BE SWITCHED AFTER ENGINE IS STARTED
1.INSPECTION USING 4WD MODE CHANGE-OVER SWITCH
●Drive modes cannot be switched after the engine is started.
●On data monitor screen of the CONSULT-II, check 4WD mode switch.
●Check if the display changes from ## to 2WD mode when the 2WD switch is pressed.
●Check if the display changes from ## to AUTO mode when the AUTO switch is pressed.
●Check if the display changes from ## to LOCK mode when the LOCK switch is pressed.
OK or NG
OK >> No malfunction detected.
NG >>
●CONSULT-II display does not change from ## when the 2WD switch is pressed. Check harness
of the 2WD switch.
●CONSULT-II display does not change from ## when the AUTO switch is pressed. Check har-
ness of the 2WD switch and LOCK switch.
●CONSULT-II display does not change from ## when the LOCK switch is pressed. Check har-
ness of the LOCK switch.
●Perform 4WD mode change-over switch inspection.
WHILE DRIVING, 4WD WARNING LAMP FLASHES RAPIDLY. (WHEN IT FLASHERS FOR
APPROX. ONE MINUTE, THEN DOES NOT ILLUMINATE.)
●While driving, 4WD warning lamp flashes rapidly. (When it flashes for Approx. One minute, then does not
illuminate.)
Rapid flashing: 2 times/second
This phenomenon protects drivetrain parts when a heavy load is applied to the electronically controlled
coupling and multiple disc clutch temperature increases. It is not a malfunction.
When the difference of revolution speed by or with the front and rear wheel with AUTO mode, the shift
switch occasionally changes to LOCK mode automatically. This is not a malfunction.
When the difference of revolution speed between the front and rear wheel with AUTO mode, the shift
switch occasionally changes to LOCK mode automatically. This is not a malfunction.
WHILE DRIVING, 4WD WARNING LAMP FLASHES SLOWLY. (WHEN IT CONTINUES TO ILLU-
MINATE UNTIL ENGINE TURNS OFF.)
1. Check using the data monitor function of the CONSULT-II.
●Perform inspection with the data monitor function of the CONSULT-II.
●Check if the value of IMPROPER SIZE TIRE MONITOR is 8 mm (0.31 in) or more.
●Stop the engine. Restart the engine and drive the vehicle at 20 km/h (12 MPH) or faster for approxi-
mately 200 seconds. Confirm the 4WD warning lamp flashes slowly.
(Check if the value of IMPROPER SIZE TIRE MONITOR is 8 mm (0.31 in) or more.)
When the tire size is normal, the value of IMPROPER SIZE TIRE MONITOR will change from 8 mm
(0.31 in) or more to 0 to 4 mm (0 to 0.16 in) (normal condition) after the vehicle is driven 20 km/h (12
MPH) or faster for approximately 5 seconds.
2. Tire inspection
●Inspection of tire 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.
1. Check using the data monitor function of the CONSULT-II.
Perform inspection by the data monitor function of the CONSULT-II.
–Check if the vehicle operation changes to 2WD, AUTO, and LOCK modes.
–Check current supplied to the 4WD solenoid valve in AUTO mode.
2. Check using the active test function of the CONSULT-II.Accelerator pedal not depressed : Approx. 0 A
Accelerator pedal depressed : Approx. 2.8 A

TROUBLE DIAGNOSIS
BRC-45
[4WD/ABS]
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3.INSPECTION USING DRIVE MODE CHANGE-OVER SWITCH
●On data monitor screen of the CONSULT, check 4WD mode switch.
●Check if the display changes from ## to 2WD mode when the 2WD switch is pressed.
●Check if the display changes from ## to AUTO mode when the AUTO switch is pressed.
●Check if the display changes from ## to LOCK mode when the LOCK switch is pressed.
Is inspection result OK?
YES >> No malfunction detected.
NO >>
●Not in AUTO mode. (In 2WD or LOCK mode)
Countermeasure: Slightly depress the accelerator pedal and check that the operation mode
changes to LOCK mode.
●Check path between drive mode switch and 4WD/ABS control unit E122 terminal No.27 (BR).
(AUTO mode is not available because a malfunction is present in the 2WD mode harness.)
NOTICE:
Mechanism of drive mode change-over
●2WD mode: Operation changes to 2WD mode when 4WD/ABS control unit connector terminal
No. 27 is shorted to ground.
●AUTO mode: Operation changes to AUTO mode when 4WD/ABS control unit connector termi-
nals No. 27 and No. 26 were shorted to ground.
●LOCK mode: Operation changes to LOCK mode when 4WD/ABS control unit connector E122
terminal No. 26 (L) is shorted to ground.
Drive Modes Cannot Be Switched After Engine Is Started.EFS001BU
1.INSPECTION USING DRIVE MODE CHANGE-OVER SWITCH
●Drive modes cannot be switched after the engine is started.
●On data monitor screen of the CONSULT, check 4WD mode switch.
●Check if the display changes from ## to 2WD mode when the 2WD switch is pressed.
●Check if the display changes from ## to AUTO mode when the AUTO switch is pressed.
●Check if the display changes from ## to LOCK mode when the LOCK switch is pressed.
Is inspection result OK?
YES >> No malfunction detected.
NO >>
●CONSULT-II display does not change from ## when the 2WD switch is pressed. Check harness
of the 2WD switch.
●CONSULT-II display does not change from ## when the AUTO switch is pressed. Check har-
ness of the 2WD switch and LOCK switch.
●CONSULT-II display does not change from ## when the LOCK switch is pressed. Check har-
ness of the LOCK switch.
●Perform drive mode change-over switch inspection.
Wheel Driving, 4WD Warning Lamp Flashes Rapidly. (When It Flashes For
Approx. One Minute, Then Does Not Illuminate.)
EFS001BV
●Wheel driving, 4WD warning lamp flashes rapidly. (When it flashes for Approx. 1 minute, then does not
illuminate.)
Rapid flashing: 2 times/second
This phenomenon protects drivetrain parts when a heavy load is applied to the electronically controlled
coupling and multiple disc clutch temperature increases. It is not a malfunction.
Wheel Driving, 4WD Warning Lamp Flashes Slowly. (When It Continues To Illu-
minate Until Engine Turns OFF.)
EFS001BW
1. Check using the data monitor function of the CONSULT-II.
●Perform inspection with the data monitor function of the CONSULT-II.
●Check if the value of IMPROPER SIZE TIRE MONITOR is 8 mm or more.

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.

TROUBLE DIAGNOSIS
BRC-91
[ESP/TCS/ABS]
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BRC
ABS Warning Lamp, ESP OFF Indicator Lamp, SLIP Indicator Lamp ON/OFF Timing
×:ON –: Lamp OFF
×: Applicable
–: Not applicable
Basic InspectionEFS001A9
PRELIMINARY CHECK 1: (BRAKE FLUID LEVEL AND LEAK INSPECTION)
1. Check the fluid level in the brake reservoir tank. If the fluid level is low, refill the brake fluid.
2. Check the area around the brake piping, ESP actuator for leaks. If a leak or oozing is detected, check as
follows:
●If the connections at the ESP actuator are loose, tighten the piping to the specified torque. Then check
again for leaks, and make sure that there is no fluid leak.
●If the flare nuts at the connections and the threads of the ESP actuator are damaged, replace the dam-
aged parts. Then check again for leaks, and make sure that there is no fluid leak.
●If a leak or oozing is detected on other parts than the ESP actuator connections, wipe the applicable
part with a clean cloth. Then check again for leaks, and if there is still a leak or oozing, replace the dam-
aged part.
ESP/TCS operation
(SLIP lamp ON)When the vehicle is passing through a road where the surface friction
coefficient varies or the wheel speed changes suddenly by downshifting
or depressing of the accelerator pedal fully, TCS may be activated tem-
porarily.
Normal
Cancel the ESP/TCS
function for the
inspection on a chas-
sis dynamometer. Before the speedometer inspection, turn ESP OFF switch off to cancel
the ESP/TCS function.
When the accelerator pedal is depressed on a chassis dynamometer,
the vehicle speed will not increase. This is not malfunction, because
TCS is activated by the wheel speed difference between front and rear.
The warning lamp may also illuminate to show “sensor system failure” in
this case. This is not malfunction either, because the stationary front
wheels are detected. Restart the engine, and drive the vehicle at 30 km/
h or higher to check that the warning lamp no longer illuminates.
ABS operation (Longer stop-
ping distance)The stopping distance may be longer for the vehicles with ABS when the
vehicle is driver on snowy and rough road. When driving on the road like
that, slow down the speed.Normal
Sluggish feelDepending on road circumstances, the driver may have a sluggish feel.
This is not abnormal, because the optimum traction has the highest pri-
ority (safety first) by TCS operation. Sometimes the driver has a slight
sluggish feel against the substantial accelerator pedal operation.Normal Symptom Symptom description Result
Condition ABS warning lampESP OFF
indicator lampSLIP indicator lamp Remarks
When the ignition switch is
OFF––– —
After the ignition switch is
turned ON
For Approx. 0.5 seconds×××—
Ignition switch ON
Approx. 0.5 seconds later––– —
When the ESP OFF switch
turns ON (ESP/TCS function
OFF).–×–Lamp goes off after Approx. 2
seconds when the engine re-start.
ESP/TCS/ABS
malfunction×××—
××–When the ESP/TCS/ABS control
unit is abnormal (power supply or
ground malfunction).
When the ESP/TCS ism
abnormal.–××—