2003 NISSAN X-TRAIL wheel

TROUBLE DIAGNOSIS
BRC-23
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
CAUTION:
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 MONI-
TOROutput condition of
drive mode indicator
lamp signalEngine running, vehi-
cle 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 harness
Vehicle runningAlmost 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)
Item Self-diagnosis Data monitor Active test
FR RH SENSOR´´-
FR LH SENSOR [OPEN]´´-
RR RH SENSOR´´-
RR LH SENSOR´´-
Speed sensor´--
Stop lamp switch -´-
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´´-
4WD solenoid valve´´´
4WD actuator relay -´-
Engine speed signal -´-
Throttle position sensor´´-

BRC-24
[4WD/ABS]
TROUBLE DIAGNOSIS
´: Applicable
–: Not applicable
SELF-DIAGNOSIS
Operation procedure
1. After obtaining customer's information, performBRC-32, "Basic Inspection".
2. After turning ignition switch OFF, connect CONSULT-II connec-
tor to data link connector on vehicle.
3. Start engine and drive at Approx. 30 km/m (19 MPH) for Approx.
1minute.
4. Stop vehicle. With engine at idle, touch “START”, “ABS” and
“SELF-DIAG RESULTS” on CONSULT-II screen in this order.
CAUTION:
“ABS” may not be displayed on the system selection
screen in the following case: When “START” was touched
justafterengineisstartedorignitionswitchisturnedto
ON. In this case, repeat procedure from step 2.
5. Self-diagnosis result is displayed. (If necessary, touch “PRINT” to print self-diagnosis result.)
lIf“NO MALFUNCTION”is displayed, check ABS warning lamp. Refer toBRC-32, "BASIC INSPECTION
3 ABS/4WD WARNING LAMP INSPECTION".
6. Check the faulty part indicated by the chart to repair or replace.
7. Start engine and drive at Approx. 30 km/m (19 MPH) for Approx. 1 minute.
CAUTION:
lCheck again to make sure that there is NO FAILURE on other parts.
lIf wheel speed sensor [SHORT] is detected, ABS warning lamp does not turn off until following
conditions: Vehicle is driven at Approx. 30km/h for Approx. 1 minute, even in normal conditions.
8. Turn OFF ignition switch to prepare for erasing memory.
9. Start engine. Touch “START,” “ABS,” “SELF-DIAG RESULTS,” and “ERASE MEMORY” on CONSULT-II
screen in this order to erase fault memory.
CAUTION:
If memory cannot be erased, proceed to 6.
10. Drive at Approx. 30 km/m (19 MPH) for Approx. 1 minute. Be sure ABS warning lamp is OFF.
Improper size tire monitor -´-
4WD mode monitor -´-
4WD warning lamp -´-
Stop lamp switch -´-
Parking brake switch -´-
Meter output -´- Item Self-diagnosis Data monitor Active test
PBIA0153E

TROUBLE DIAGNOSIS
BRC-25
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Display item list
Faulty lines Malfunction detecting condition Check harness
Front RH wheel speed sensor
[OPEN]Either of following causes may be possible. Circuit of front RH
wheel speed sensor is open. Abnormally high input voltage is
caused by a short to power supply on signal lines.
Wheel speed sensor
harness Front LH wheel speed sensor
[OPEN]Circuit of front LH wheel speed sensor is open, or abnormally
high input voltage is caused by a short to power supply on signal
lines.
REAR RH wheel speed sensor
[OPEN]Either of following causes may be possible. Circuit of rear RH
wheel speed sensor is open. Abnormally high input voltage is
caused by a short to power supply on signal lines.
REAR LH wheel speed sensor
[OPEN]Either of following causes may be possible. Circuit of rear LH
wheel speed sensor is open. Abnormally high input voltage is
caused by a short to power supply on signal lines.
Front RH wheel speed sensor
[short 1]or Front RH wheel speed
sensor [short 2]
(Note 1), (Note 2)At RH front wheel speed sensor, following conditions occur:
abnormally high or low input voltage by short to power supply or
ground on signal lines, abnormal input signal
Front LH wheel speed sensor
[short 1]
or front left wheel speed sensor
[open 2]
(Note 1), (Note 2)At LH front wheel speed sensor, following conditions occur:
abnormally high or low input voltage by short to power supply or
ground on signal lines, abnormal input signal
Rear RH wheel speed sensor
[SHORT]
(Note 1), (Note 2)At RH rear wheel speed sensor, following conditions occur:
abnormally high or low input voltage by short to power supply or
ground on signal lines, abnormal input signal
Rear LH wheel speed sensor
[SHORT]
(Note 1), (Note 2)At LH rear wheel speed sensor, following conditions occur:
abnormally high or low input voltage by short to power supply or
ground on signal lines, abnormal input signal
FR RH IN ABS SOL
[OPEN] [SHORT]At RH front wheel ABS inlet solenoid valve, following conditions
occur: open circuit, output voltage is abnormally lower or higher
than control value by short to ground on control line.
ABS solenoid valve and
actuator relay harness FR LH IN ABS SOL
[OPEN] [SHORT]At LH front wheel ABS inlet solenoid valve, following conditions
occur: open circuit, output voltage is abnormally lower or higher
than control value by short to ground on control line.
RR RH IN ABS SOL
[OPEN] [SHORT]At RH rear wheel ABS inlet solenoid valve, following conditions
occur: open circuit, output voltage is abnormally lower or higher
than control value by short to ground on control line.
RR LH IN ABS SOL
[OPEN] [SHORT]At LH rear wheel ABS inlet solenoid valve, following conditions
occur: open circuit, output voltage is abnormally lower or higher
than control value by short to ground on control line.
FR RH OUT ABS SOL
[OPEN] [SHORT]At RH front wheel ABS outlet solenoid valve, following condi-
tions occur: open circuit, output voltage is abnormally lower or
higher than control value by short to ground on control line.
FR LH OUT ABS SOL
[OPEN] [SHORT]At LH front wheel ABS outlet solenoid valve, following conditions
occur: open circuit, output voltage is abnormally lower or higher
than control value by short to ground on control line.
RR RH OUT ABS SOL
[OPEN] [SHORT]At RH rear wheel ABS outlet solenoid valve, following conditions
occur: open circuit, output voltage is abnormally lower or higher
than control value by short to ground on control line.
RR LH OUT ABS SOL
[OPEN] [SHORT]At LH rear wheel ABS outlet solenoid valve, following conditions
occur: open circuit, output voltage is abnormally lower or higher
than control value by short to ground on control line.
ABS motor [ON error]ABS actuator motor turned ON when the ABS motor is con-
trolled OFF.ABS motor relay and
harness
ABS motor [OFF error]ABS actuator motor turned OFF when the ABS motor is con-
trolled ON.

BRC-26
[4WD/ABS]
TROUBLE DIAGNOSIS
(Note 1): When vehicle was stuck on slippery road, and spin its wheels for Approx. 10 - 80 seconds (the period depends on vehicle
speed). ABS warning lamp may come on. However, this is not abnormal.
(Note 2): Repair short circuit in sensor. ABS warning lamp will come on when ignition switch is turned ON. According to self-diagnosis
operation procedure, drive vehicle at Approx. 30 km/m (19 MPH). Then check ABS warning lamp goes out in about one minute.
CAUTION:
If “ALL MODE 4WD” is not displayed on system selection screen, check the following: 4WD actuator and control unit, data link
connector harness, and No. Of CONSULT-II program card
DATA MONITOR
lFor details of data monitor function, refer to CONSULT -II Instruction Manual.
Operation procedure
1. Turn the ignition switch to OFF.
2. Connect CONSULT-II connector to data link connector on vehicle.
3. Turn ignition switch ON.
4. Touch “START” on the display.
5. Touch “ALL MODE 4WD” on display.
CAUTION:
“ALL MODE 4WD” may not be displayed on the system selection screen in the following case:
When “START” was touched just after engine is started or ignition switch is turned to ON. In this
case, repeat procedure from step 2.
ABS actuator relay [ON error] ABS actuator relay turned ON wheel it is controlled OFF.
ABS actuator relay and
harness ABS ACTUATOR RELAY
[OFF abnormal]ABS actuator relay turned OFF wheel it is controlled ON.
BATTERY VOLTAGE [VB-HIGH] 4WD control module power voltage is excessively high.
Control unit power sup-
ply circuit
BATTERY VOLTAGE [VB-LOW] 4WD control module power voltage is excessively low.
DECEL G-SENSOR Longitudinal G -sensor output voltage is outside specification.
G -sensor harness
G-SENSOR VOLTAGEPower voltage of longitudinal G -sensor remains abnormally
high or low for a certain period of time.
ETS SOLENOID
(4WD solenoid valve) (OPEN)4WD solenoid valve control terminal is not supplied with proper
voltage due to open circuit in 4WD solenoid valve.
4WD actuator relay,
solenoid, and harness ETS SOLENOID
(4WD solenoid valve) (Short)4WD solenoid valve control terminal is not supplied with proper
voltage due to short circuit in 4WD solenoid valve.
ETS SOLENOID
(4WD solenoid valve)
(CURRENT FAILURE)
DECEL G-SEN MONICurrent supplied to 4WD solenoid valve is abnormally high or
low compared with the specification.
CONTROL UNIT Processing function of 4WD/ABS control unit is malfunctioning.4WD/ABS control unit,
power and ground cir-
cuits
DECEL G-SEN MONI Output voltage of longitudinal G -sensor is outside specification G -sensor harness
DECEL G-SEN IN Output voltage of longitudinal G -sensor is outside specification G -sensor harness
3 V POWER SUPPLY CHECK4WD/ABS control unit internal 3V power supply is malfunction-
ingControl unit power sup-
ply circuit
4WD A/R CHECK 4WD actuator relay turned ON while it is controlled OFF.
4WD actuator relay,
4WD solenoid and har-
ness. 4WD SOL/V CHECK4WD solenoid not supplied with proper voltage due to open cir-
cuit in 4WD solenoid valve.
CAN COMM
lCAN communication function of 4WD control units is not mal-
functoning.
lCAN communication function of EPS control unit, ECM is mal-
functioning.CAN communication
system of 4WD control
unit.
ABS 4WD COMM4WD/ABS control unit internal 3V power supply is malfunction-
ingEPS control unit
and harness Faulty lines Malfunction detecting condition Check harness

TROUBLE DIAGNOSIS
BRC-27
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
6. Touch “DATA MONITOR”.
7. Return to monitor item selection screen. Touch any of “ECU INPUT SIGNALS”, “MAIN SIGNALS”,
“CAN DIG SUPPORT MINTR” or “SELECTION FROM MENU”.
Refer to following “Data monitor item chart”.
8. Touch “MONITOR START”.
9. Screen of data monitor is displayed.
Display item list
Item (Unit)Monitor item selection
Remarks
Control module input
itemMain item Item menu selection
FR RH SENSOR (km/
h)´´´Wheel speed calcu-
lated by front RH wheel
speed sensor signal is
displayed.
FR LH SENSOR (km/h)´´´Wheel speed calcu-
lated by front LH wheel
speed sensor signal is
displayed. (Note 1)
RR RH SENSOR (km/
h)´´´Wheel speed calcu-
lated by rear RH wheel
speed sensor signal is
displayed. (Note 1)
RR LH SENSOR (km/
h)´´´Wheel speed calcu-
lated by rear LH wheel
speed sensor signal is
displayed.
DECEL G-SENSOR´´´Condition of G -sensor
is displayed.
THRTL POS SEN´´´Indicates throttle posi-
tion sensor signal volt-
age
STOP LAMP SW´´´Operating condition of
ABS warning lamp by
control unit is dis-
played.
ENGINE SPEED SIG
(STOP/RUN)´´´Condition of stop lamp
switch (ON/OFF) is dis-
played.
FR RH IN SOL -´´Operating condition
(ON/OFF) of rear RH
ABS inlet solenoid
valve is displayed.
FR RH OUT SOL -´´Operating condition
(ON/OFF) of rear RH
ABS outlet solenoid
valve is displayed.
FR LH IN SOL -´´Operating condition
(ON/OFF) of rear RH
ABS inlet solenoid
valve is displayed.
FR LH OUT SOL (ON/
OFF)-´´Operating condition
(ON/OFF) of rear RH
ABS outlet solenoid
valve is displayed.

TROUBLE DIAGNOSIS
BRC-29
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
´: Applicable
–: Not applicable
ACTIVE TEST
Operation procedure
CAUTION:
lDo not perform active test wheel running.
lBe sure completely bleed air from brake system.
lActive 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 OFFVo l ta g e - -´Displays values mea-
sured by voltage probe
FREQUENCY - -´Refer to CONSULT
operation manual. Item (Unit)Monitor item selection
Remarks
Control module input
itemMain item Item menu selection
SFIA0394E
Operation Up Keep Down
ABS inlet S/V OFF ON ON
ABS outlet S/V OFF OFF ON*
SFIA0395E

BRC-32
[4WD/ABS]
TROUBLE DIAGNOSIS
4WDSOLENOIDVALVE
lDisconnect connector and measure resistance between termi-
nals B152 No. 1 (L/W) and No. 2 (LG).
Basic InspectionEFS001BK
BASIC INSPECTION 1 BRAKE FLUID LEVEL AND LEAKAGE INSPECTION
1. Check fluid level in brake reservoir tank. If fluid level is low, refill brake fluid.
2. Check area around brake piping and ABS actuator for leaks. If a leak or oozing is detected, check as fol-
lows:
lIf connections at ABS actuator are loose, tighten piping to the specified torque. Then check again for
leaks, and be sure there is no fluid leak.
lIf the flare nuts at the connections and the threads of the ABS actuator are damaged, replace the dam-
aged parts. Then check again for leaks, and make sure that there is no fluid leak.
lIf leak or oozing is detected except for ABS actuator connections, wipe it with clean cloth. Then check
again for leaks. If there is still leak or oozing, replace damaged part.
lIf leak or oozing is detected on ABS actuator, wipe with a clean cloth. Check again for leaks, and if
there is still leak or oozing, replace ABS actuator.
CAUTION:
ABS actuator body cannot be disassembled.
BASIC INSPECTION 2 INSPECTION FOR LOOSE POWER SUPPLY TERMINAL
Check battery for looseness on battery positive/negative terminals and ground connection.
BASIC INSPECTION 3 ABS/4WD WARNING LAMP INSPECTION
1. Be sure ABS warning lamp turns on when ignition switch is turned ON. If it does not turn on, check ABS
warning lamp harness.
2. Check 4WD warning lamp illuminates with ignition switch ON. If not so, check 4WD warning lamp path.
3. Be sure ABS warning lamp turns off after approximately 1 second when ignition switch is turned ON. If it
does not turn off, perform self-diagnosis.
4. Be sure 4WD warning lamp turns off after several seconds when engine is started. If it does not turn off,
perform self-diagnosis.
5. After driving the vehicle at Approx. 30km/h for a few seconds, check 4WD warning lamp and ABS warning
lamp do not illuminate.
6. After completing the self-diagnosis, always erase the diagnosis memory.
Wheel Speed Sensor SystemEFS001BL
INSPECTION PROCEDURE
1.TIRE INSPECTION
Check air pressure, wear, and size.
Are air pressure, wear, and size within specifications?
YES >> GO TO 2.
NO >> Adjust air pressure, or replace tire.4WD solenoid valve 1 - 2 : Approx. 2.45W
SDIA0136E

TROUBLE DIAGNOSIS
BRC-33
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
2.SENSOR ROTOR INSPECTION
Check sensor rotor tooth for damage.
Is inspection result OK?
YES >> GO TO 3.
NO >> Replace sensor rotor.
3.CHECK THE CONNECTOR
1. Remove both the malfunctioning wheel speed sensor (identified at
control unit) and the 4WD/ABS control unit connector.Check the
deformation of the terminal or if the connection is at the incomplete
state.Then connect the connectors.
2.Operate self-diagnosis.
Does ABS warning lamp illuminate?
YES >> GO TO 4
NO >> Check is completed.
4.CHECK WHEEL SPEED SENSOR.
Check internal resistance of wheel speed sensor.
Is inspection result OK?
YES >> GO TO 5.
NO >> Replace wheel speed sensor.
5.CHECK WHEEL SPEED SENSOR CIRCUIT.
1. Disconnect control unit connector and wheel speed sensor con-
nector.
2. Check continuity between the 4WD/ABS control unit harness
connector E122 terminal N0.43 (g/w),34 (L/W),37 (W),46 (B),35
((L), 44(BW),45 (WR),36 (OR/B) and G -sensor harness con-
nectorE59No.1(G/W),2(L/W),E17No.1(W),2(B),B126No.1
(L), 2 (B/W), B130 No.1 (W/R), 2(OR/B)
Is inspection result OK?
YES >> Replace 4WD/ABS control unit.
NO >> Repair or replace the harness.
SDIA0125E
Resistance :1.44 - 1.76 kW
SFIA0357E
SDIA0126E