2003 NISSAN X-TRAIL engine

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]
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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]
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´: 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-30
[4WD/ABS]
TROUBLE DIAGNOSIS
NOTE:
lIf active test is performed with brake pedal depressed, pedal
stroke may be changed. This is a normal condition.
l“TEST STOP” is displayed 10 seconds later from the operation
start.
lTo perform test again after “TEST STOP” is displayed, repeat
step 6 of operation procedure.
ABS motor
Touch “ON” and “OFF” on screen. Check ABS motor relay operates
as shown in the following chart.
NOTE:
lIf active test is performed with brake pedal depressed, pedal
stroke may be changed. This is a normal condition.
l“TEST STOP” is displayed 10 seconds later from the operation
start.
Active test
4WD solenoid valve
Under the vehicle stopped with engine running, touch UP, DOWN on
screen. Adjust 4WD solenoid command current.
Check the monitor current at that time. If monitor current is within
Approx.±10%, light switch is normal.
CAUTION:
Do not continuously energize solenoid for long period of time.
Component InspectionEFS001BJ
ABS ACTUATOR
lDisconnect each ABS actuator E69, E70, E71 connector. Con-
firm continuity and resistance value between each pair of ABS
actuator-side terminal.
CAUTION:
Be sure ABS motor is securely grounded.
SFIA0396E
Operation ON OFF
ABS actuator ON ON
ABS motor ON OFF
SFIA0397E
SDIA0626E
SFIA0352E

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-39
[4WD/ABS]
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4WD WARNING LAMP DOES NOT ILLUMINATE WITH IGNITION ON
1.INSPECTION OF BLOWN FUSE BETWEEN IGNITION SWITCH AND COMBINATION METER
Check blown fuse between ignition switch and combination meter.
OK or NG
OK >> GO TO 2 (No blown fuse)
NG >> Replace the fuse and perform the inspection again.
2.COMBINATION METER POWER SUPPLY CIRCUIT INSPECTION
1. Disconnect combination meter connector.
2. Check voltage between the combination meter harness connector M46 terminal No. LHD models: 46 (W/
L) RHD models: 59 (W/L) and body ground.
OK or NG
OK >> Malfunctioning combination meter.
NG >> Check fuse 10A [#11] to combination meter harness and connector.
4WD WARNING LAMP DOES NOT GO OUT SEVERAL SECONDS AFTER ENGINE
STARTED.(4WD MODE INDICATOR LAMP GOES OUT)
1.PERFORM SELF-DIAGNOSIS
Using CONSULT-II perform self-diagnosis.
OK or NG
OK >> No malfunction detected. Perform inspection again.
NG >>
lDetermine the location of the malfunction according to the result of Self-diagnosis using CON-
SULT-II. (Malfunction is present in the 4WD system.)
lCONSULT-II does not display 4WD system-related trouble codes. GO TO 2.
2.4WD CONTROL UNIT CONNECTOR CONNECTION INSPECTION
lCheck 4WD/ABS control unit connector for proper connection.
OK or NG
OK >> Reconnect the 4WD/ABS control unit connector properly and perform inspection again.
NG >> Repair or replace the connector.
HEAVY TIGHT-CORNER BRAKING SYMPTOM OCCURS WHEN THE VEHICLE IS DRIVEN IN
AUTO MODE AND THE STEERING WHEEL IS TURNED FULLY TO EITHER SIDE AFTER THE
ENGINE IS STARTED
1.PERFORM SELF-DIAGNOSIS.
Using CONSULT-II perform self-diagnosis.
OK or NG
OK >> GO TO 2. (No self-diagnosis malfunction indicated.)
NG >> Determine the location of the malfunction according to the result of Self-diagnosis using CON-
SULT-II. (Malfunction is present in the 4WD system.)

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
lDrive modes cannot be switched after the engine is started.
lOn data monitor screen of the CONSULT-II, check 4WD mode switch.
lCheck if the display changes from ## to 2WD mode when the 2WD switch is pressed.
lCheck if the display changes from ## to AUTO mode when the AUTO switch is pressed.
lCheck if the display changes from ## to LOCK mode when the LOCK switch is pressed.
OK or NG
OK >> No malfunction detected.
NG >>
lCONSULT-II display does not change from ## when the 2WD switch is pressed. Check harness
of the 2WD switch.
lCONSULT-II display does not change from ## when the AUTO switch is pressed. Check har-
ness of the 2WD switch and LOCK switch.
lCONSULT-II display does not change from ## when the LOCK switch is pressed. Check har-
ness of the LOCK switch.
lPerform 4WD mode change-over switch inspection.
WHILE DRIVING, 4WD WARNING LAMP FLASHES RAPIDLY. (WHEN IT FLASHERS FOR
APPROX. ONE MINUTE, THEN DOES NOT ILLUMINATE.)
lWhile 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.
lPerform inspection with the data monitor function of the CONSULT-II.
lCheck if the value of IMPROPER SIZE TIRE MONITOR is 8 mm (0.31 in) or more.
lStop 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
lInspection of tire pressure
lWear condition
lCheck size of the front and rear tires. (No excessive difference should be observed.) Refer toGI-46,
"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.
Accelerator pedal not depressed: Approx. 0 A
Accelerator pedal depressed: Approx. 2.8 A

TROUBLE DIAGNOSIS
BRC-43
[4WD/ABS]
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3.CHECK CONTINUITY BETWEEN IGNITION SWITCH AND ABS WARNING LAMP.
lDisconnect 4WD/ABS control unit connector.
lCheck continuity between ignition switch and 4WD/ABS control module terminal No. 4. (Open circuit
check)
Is inspection result OK?
YES >> Continuity exists. Connect 4WD/ABS control module connector, check again.
NO >> Continuity does not exist. Check ABS warning lamp path.
4.CHECK FUSE.
lCheck if Fuse No.8 is working normally.
Is the check result OK?
YES >> Repair or replace the harness in between 4WD/ABS control unit and IGN.
NO >> Replace the fuse and replace again.
lIf the figure of the monitor is with in±10% of the set value of E-TS solenoid electric current, 4WD/ABS C/
U is operating normally.Check for electric control coupling ASSY is required.
4WD warning lamp does not illuminate with ignition ON.EFS001BR
1.INSPECTION OF BLOWN 4WD WARNING LAMP BULB
lRemove glove box on the passenger side and disconnect the 4WD/ABS control unit connector.
lConfirm continuity between 4WD/ABS control unit connector terminals No. 3 (IGN) and No. 4 (ABS warn-
ing lamp).
Is inspection result OK?
YES >> GO TO 3. (Continuity exists.)
NO >>
lCheck 4WD warning lamp harness.
lRemove meter control module assembly and check for blown 4WD warning lamp bulb.
2.4WD ACTUATOR RELAY HARNESS INSPECTION
lOpen the hood and check that the 4WD relay is properly installed in the relay box.
lConfirm continuity between 4WD/ABS control unit connector terminals No. 7 (4WD warning lamp) and No.
104 (ground).
lConfirm continuity between 4WD/ABS control unit connector terminals No. 3 (IGN) and No. 18 (4WD
actuator relay).
Is inspection result OK?
YES >> Continuity exists. Connect 4WD/ABS control unit connector, check again.
NO >> Check ABS warning lamp harness.
4WD warning lamp does not go out several seconds after engine is started.
(Drive mode indicator lamp goes out.)
EFS001BS
1.USING CONSULT, PERFORM SELF-DIAGNOSIS.
4WD warning lamp does not go out several seconds after the engine is started. (Drive mode indicator lamp
goes out.)
Is inspection result OK?
YES >> No malfunction detected. Perform inspection again.
NO >>
lDetermine the location of the malfunction according to the result of self-diagnosis using CON-
SULT. (Malfunction is present in the 4WD system.)
lCONSULT-II does not display ABS -related trouble codes. Proceed to 2.