4WD NISSAN X-TRAIL 2003 Electronic Service Manual

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

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.

TROUBLE DIAGNOSIS
BRC-43
[4WD/ABS]
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BRC
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.

BRC-44
[4WD/ABS]
TROUBLE DIAGNOSIS
2.4WD/ABS CONTROL UNIT CONNECTOR CONNECTION INSPECTION
lRemove glove box on the passenger side and check 4WD/ABS control unit connector for proper connec-
tion.
Is inspection result OK?
YES >> 4WD/ABS control unit connector is properly connected.
NO >> Reconnect the 4WD/ABS control module connector properly and perform inspection again.
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.
EFS001BT
1.USING CONSULT, PERFORM SELF-DIAGNOSIS.
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.
Is inspection result OK?
YES >> GO TO 2. (No self-diagnosis malfunction indicated.)
NO >> Determine the location of the malfunction according to the result of self-diagnosis using CON-
SULT. (Malfunction is present in the 4WD system.)
2.CHECK USING THE DATA MONITOR FUNCTION OF THE CONSULT.
lPerform inspection by the data monitor function of the CONSULT.
lCheck that the operation is in AUTO mode.
lMeasure voltage when the accelerator pedal is not depressed. (Accelerator pedal not depressed: Approx.
0.5V or lower)
lMeasure the current supplied to the E-TS solenoid valve. (Accelerator pedal not depressed: Approx. 0A)
Is inspection result OK?
YES >> GO TO 3. (No self-diagnosis malfunction indicated.)
NO >>
lNot in AUTO mode. GO TO 3.
lVoltage when accelerator pedal is not depressed is higher than approximately 0.5V.
lE-TS solenoid valve current when accelerator pedal is not depressed is other than 0A.
lCountermeasure: Keep the vehicle idling for approximately 15 minutes before checking again.
(Voltage when accelerator pedal is not depressed will be automatically reset to zero during this
period.)

TROUBLE DIAGNOSIS
BRC-45
[4WD/ABS]
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BRC
3.INSPECTION USING DRIVE MODE CHANGE-OVER SWITCH
lOn data monitor screen of the CONSULT, 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.
Is inspection result OK?
YES >> No malfunction detected.
NO >>
lNot in AUTO mode. (In 2WD or LOCK mode)
Countermeasure: Slightly depress the accelerator pedal and check that the operation mode
changes to LOCK mode.
lCheck 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
l2WD mode: Operation changes to 2WD mode when 4WD/ABS control unit connector terminal
No. 27 is shorted to ground.
lAUTO mode: Operation changes to AUTO mode when 4WD/ABS control unit connector termi-
nals No. 27 and No. 26 were shorted to ground.
lLOCK 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
lDrive modes cannot be switched after the engine is started.
lOn data monitor screen of the CONSULT, 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.
Is inspection result OK?
YES >> No malfunction detected.
NO >>
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 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
lWheel 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 illumi-
nate until engine turns OFF.)
EFS001BW
1. Check using the data monitor function of the CONSULT.
lPerform inspection with the data monitor function of the CONSULT.
lCheck if the value of IMPROPER SIZE TIRE MONITOR is 8 mm or more.

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.

TROUBLE DIAGNOSIS
BRC-47
[4WD/ABS]
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BRC
Inspection of drive mode change-over switch pathEFS001C0
1.INSPECTION OF DRIVE MODE CHANGE-OVER SWITCH
Inspection of drive mode change-over switch
Is inspection result OK?
YES >> GO TO 2.
NO >> Poor drive mode change-over switch
2.INPUT SIGNAL CHECK.
Select control module input item on monitoring item selection. While monitoring drive mode change-over
switch items, press 2WD mode switch. Check the display changes from ##to 2WD. Check the display for
AUTO and LOCK just the same. (## indicates when mode SW is not pressed.)
Is inspection result OK?
YES >>l4WD/ABS control unit input/output signal inspection
lRecheck 4WD/ABS control unit connector terminals and connection.
NO >> GO TO 3.
3.INSPECTION OF DRIVE MODE CHANGE-OVER SWITCH POWER SUPPLY
lDisconnect drive mode change-over switch connector.
lTurn ignition switch ON.
lMeasure voltage between drive mode change-over switch connector and body ground. Check the voltage
is 4V or more.
Is inspection result OK?
YES >> GO TO 4.
NO >> Harness malfunction or connector malfunction between ignition switch and drive mode change-
over switch connector or connector malfunction.
4.HARNESS CONTINUITY INSPECTION
lTurn OFF ig nitio n switch.
lConfirm continuity between following terminals.
(4WD/ABS control unit connector E122 terminal No.26 (L) - Drive mode switch connector M39 terminal
No.2 (L)) (4WD/ABS control unit connector E122 terminal No. 27 (BR) - Drive mode switch connector M39
terminal No.1 (BR)).
Is inspection result OK?
YES >> GO TO 5.
NO >> Malfunctioning harness or connector.
5.HARNESS CONTINUITY INSPECTION
Drive the vehicle for a while and the perform self-diagnosis.
Is inspection result OK?
YES >> End
NO >>
l4WD/ABS control unit input/output signal inspection
lRecheck 4WD/ABS control unit connector terminals and connection.

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”.