NISSAN X-TRAIL 2003 Electronic Repair Manual

TROUBLE DIAGNOSIS
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4.G-SENSOR HARNESS INSPECTION
1. Disconnect G-sensor connector.
2. Disconnect control unit connector.
3. Check harness between control unit and G-sensor.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace the harness.
5.G-SENSOR CIRCUIT CONNECTOR INSPECTION
Check the G-sensor and the control unit harness connector (including intermediate connector).
OK or NG
OK >> Perform the following.
1. Connect the connector and perform self-diagnosis again.
2. Be sure to drive the vehicle at 30km/h (19MPH) for 1minutes or longer and be sure that the
4WD warning lamp does not come on.
NG >> Repair or replace the connector.
4WD SOLENOID, ACTUATOR RELAY SYSTEM
Checking procedure
1.INSPECTION START
Use CONSULT-II and perform self-diagnosis.
OK or NG
OK >> Drive at 30 km/h (19MPH) for at least 1 minute. Check that 4WD warning lamp does not turn ON.
NG >> GO TO 2.
2.CONNECTOR INSPECTION
1. Disconnect the 4WD control unit connector and the 4WD solenoid connector. Check that terminals are not
deformed. Check that the connectors were connected properly. Reconnect connectors.
2. Perform self-diagnosis again.
OK or NG
OK >> Diagnosis completed.
NG >> GO TO 3.
3.INSPECTION OF 4WD SOLENOID UNIT
1. Disconnect connector B152 and check resistance between terminals No.1 and 2.
OK or NG
OK >> GO TO 4.
NG >> Replace 4WD solenoid.1 - 2 Approx. 2.45W

TF-52
TROUBLE DIAGNOSIS
4.INSPECTION OF 4WD SOLENOID CIRCUIT HARNESS
1. Disconnect the 4WD solenoid connector.
2. Disconnect the 4WD control unit.
3. Check circuit continuity between control unit harness connector E122 terminal No.102 (LG) and 4WD
solenoid harness connector B152 terminal No.2 (LG).
4. Disconnect the 4WD actuator relay connector.
5. Check circuit continuity between 4WD solenoid harness connector B152 terminal No.1 (L/W) and 4WD
actuator relay connector E10 terminal No.5 (L/W)
OK or NG
OK >> GO TO 5.
NG >> Repair or replace the harness.
5.CHECK 4WD ACTUATOR RELAY AND CONNECTOR
1. Check the 4WD actuator relay and control unit harness connector.
2. Check the 4WD actuator relay unit.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace 4WD actuator relay and connector.
6.CHECK 4WD ACTUATOR RELAY POWER CIRCUIT
1. Disconnect the 4WD control unit connector.
2. Turn the ignition switch ON and check voltage between the 4WD control unit harness connector E122 ter-
minal No.18 (BR/W) and body ground.
OK or NG
OK >> GO TO 7.
NG >>
lCheck items below. Perform self-diagnosis again.
–Check fuse 10 A (#8).
–Check harness and connectors between the fuse 10 A (#8), the 4WD actuator relay and the
4WD control unit.
7.CHECK 4WD ACTUATOR RELAY GROUND CIRCUIT
1. Disconnect the 4WD actuator relay connector.
2. Check continuity between the 4WD actuator relay harness connector E10 terminal No.3 (B) and body
ground.
OK or NG
OK >> 1. Connect the connector and perform self-diagnosis again.
2. Follow self-diagnosis procedure and, at the end, be sure to drive the vehicle at 30 km/h (19
MPH) for at least 1 minute and check that the 4WD warning lamp does not turn ON.
NG >> Repair or replace harness.102 (LG) - 2 (LG) : Continuity should exist.
1 (L/W) - 5 (L/W) : Continuity should exist.
18 (BR/W) - Body ground : Battery voltage
3 (B) - Body ground :Continuity should exist.

TROUBLE DIAGNOSIS
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CAN COMMUNICATION SYSTEM
Checking procedure
1.INSPECTION START
Check the self-diagnosis results with CONSULT-II.
Status of "CAN communications" is OK?
YES >> After printing out self-diagnosis results, go to 2.
NO >> Checking is completed.
2.SYMPTOM CHECK
Check "CAN diagnosis support monitor" on data monitor.
>> After printing out monitor items, GO TOLAN-11, "
CAN SYSTEM (FOR M/T MODELS)""CAN sys-
tem". (Refer to CAN communication connection unit.)
4WD MODE SWITCH SYSTEM
1.INPUT SIGNAL CHECK
Check using the data monitor function of the CONSULT-II. While monitoring the 4WD mode 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.)
OK or NG
OK >>l4WD control unit input/output signal inspection
lRecheck 4WD control unit connector terminals and connection.
NG >> GO TO 3.
2.INSPECTION OF 4WD MODE SWITCH POWER SUPPLY
lDisconnect 4WD mode switch connector.
lTurn ignition switch ON.
lMeasure voltage between 4WD mode change and over switch harness connector M39 terminal No.26 (L),
No.27 (BR).
OK or NG
OK >> GO TO 4.
NG >> Harness malfunction or connector malfunction between ignition switch and 4WD mode switch
connector or connector malfunction.
Normal operation Malfunctioning
CAN COMM: OK CAN COMM: OK
CAN CIRC1: OK CAN CIRC1: UNKWN
CAN CIRC2: OK CAN CIRC2: OK
CAN CIRC3: OK CAN CIRC3: OK
26(L), 27(BR) - Body ground : 4V or more.

TF-54
TROUBLE DIAGNOSIS
3.HARNESS CONTINUITY INSPECTION
lTurn ignition switch OFF.
lConfirm the continuity between the following terminals.
–4WD control unit harness connector E122 terminal No. 26 (L) and 4WD mode switch harness connector
M39 terminal No. 2 (L)
–4WD control unit harness connector E122 terminal No. 27 (BR) and 4WD mode switch harness connec-
tor M39 terminal No. 1 (BR)
OK or NG
OK >> GO TO 5.
NG >> Malfunctioning harness or connector.
4.HARNESS CONTINUITY INSPECTION
Drive the vehicle for a while and the perform self-diagnosis.
OK or NG
OK >> End
NG >>
l4WD control unit input/output signal inspection
lRecheck 4WD control unit connector terminals and connection.
Trouble Diagnoses for SymptomsEDS000IS
4WD INDICATOR LAMP DOSE NOT COME ON FOR APPROXIMATELY 1 SECOND WHEN THE
IGNITION SWITCH IS TURNED TO ON
Inspection Procedure
1.CHECK BLOWN FUSES BETWEEN IGN AND COMBINATION METER
Check that there are no blown fuses between IGN and combination meter.
OK or NG
OK >> GO TO 2.
NG >> Replace fuse and check again.
2.CHECK CONTINUITY BETWEEN COMBINATION METER AND 4WD CONTROL UNIT
1. Disconnect combination meter connector and 4WD control unit connector.
2. Check continuity between combination meter harness connector M46 terminal No.18 (LHD models: PU/
W, RHD models: Y/G) and 4WD control unit harness control unit connector E122 terminal No.16 (Y/G).
OK or NG
OK >> GO TO 3.
NG >> Check harness between combination meter and 4WD control unit.26(L) - 2(L) : Continuity should exist.
27(BR) - 1(BR) : Continuity should exist.
18 (LHD models: PU/W, RHD models: YG) - 16 (Y/G)
: Continuity should exist.

TROUBLE DIAGNOSIS
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3.CHECK COMBINATION METER POWER CIRCUIT
1. Disconnect combination meter connector.
2. With ignition ON, check the voltage between the combination meter harness connector M44 terminal
No.46 (W/L) (LHD models) or No.59 (W/L) (RHD models) and body ground.
OK or NG
OK >> GO TO 4.
NG >> Check combination meter circuits.
4.CHECK 4WD AUTO LAMP (ON COMBINATION METER) CIRCUIT
Check continuity between combination meter terminal 46 (LHD models) or 59 (RHD models) and terminal 18.
OK or NG
OK >> Using CONSULT-II perform self-diagnosis.
NG >> Check for burned-out bulb in 4WD AUTO lamp.
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. LHD models:46 (W/L), RHD models: 59(W/L) 1(W)
- Body ground
: Battery voltage
46 (LHD models) or 59 (RHD models) - 18
: Continuity should exist.

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TROUBLE DIAGNOSIS
2.4WD CONTROL UNIT CONNECTOR CONNECTION INSPECTION
lCheck 4WD control unit connector for proper connection.
OK or NG
OK >> Reconnect the 4WD 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.)
2.CHECK USING THE DATA MONITOR FUNCTION OF THE CONSULT- II.
lPerform inspection by the data monitor function of the CONSULT-II.
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 4WD solenoid valve. (Accelerator pedal not depressed: approx. 0A)
OK or NG
OK >> GO TO 3. (No self-diagnosis malfunction indicated.)
NG >>
lNot in AUTO mode. GO TO 3.
lVoltage when accelerator pedal is not depressed is higher than approximately 0.5V.
l4WD solenoid valve current when the 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
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3.INSPECTION USING 4WD MODE CHANGE-OVER SWITCH
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 >>
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 circuit between 4WD mode switch harness connector M39 terminal No.1 (BR) and
4WD control unit harness connector E122 terminal No. 27 (BR).
(AUTO mode is not available because a malfunction is present in the 2WD mode harness.)
NOTICE:
Mechanism of 4WD mode change-over
l2WD mode: Operation changes to 2WD mode when 4WD control unit harness connector E122
terminal No. 27 (BR) is shorted to ground.
lAUTO mode: Operation changes to AUTO mode when 4WD control unit harness connector
E122 terminals No. 27 (BR) and No. 26 (L) is shorted to ground.
lLOCK mode: Operation changes to LOCK mode when 4WD control unit harness connector
E122 terminal No. 26 (L) is shorted to ground.
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 diameters 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.

TF-58
TROUBLE DIAGNOSIS
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.)
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.
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.Accelerator pedal not
depressed:Approx. 0A
Accelerator pedal
depressed:Approx. 2.8A
Example) Monitor value becomes approx. 1A for 4WD solenoid current 1A setting.

TROUBLE DIAGNOSIS
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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

TF-60
SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
PFP:00030
General SpecificationsEDS0 00 I6
Inspection and AdjustmentEDS0004Y
PRELOAD TORQUE BEFORE DISASSEMBLY
PRELOAD TORQUE AFTER DISASSEMBLY AND REASSEMBLY
BACKLSH
Unit: mm (in)
SELECTIVE PARTS
Gear ring bearing adjusting shim
Unit: mm (in) Applied model QR20DE YD22ET
Transfer model TY20A
Oil capacity(Approx) (lmp p t)0.310(1/2)
Gear ratio2.470
Number of teethDrivepinion 17
Drive gear 42
Item Specification [N·m (kg·m, in-lb.)]
Pinion bearing (P
1)0.10 - 0.39 (0.01 - 0.04,1-3)
Gear ring bearing to pinion bearing
(Overall preload)When all oil seals are installed: P
1+0.16 - 0.22 (0.016 - 0.023,1.4-1.9)
Without transfer case oil seal and gear ring oil
sealP
1+0.06 - 0.12 (0.006 - 0.013,0.6-1.1)
Item Specification [N·m (kg·m, in-lb)]
Pinion bearing (P’
1)0.40 - 0.78 (0.04 - 0.08,4-6)
Gear ring bearing to pinion bearing
(Overall preload)When all oil seals are installed: P’
1+0.45 - 0.47 (0.045 - 0.048,3.9-4.1)
Without transfer case oil seal and gear ring oil
sealP’
1+0.35 - 0.37 (0.035 - 0.038,1-3)
Item Standard
Drive gear to drive pinion gear 0.13 - 0.19 (0.0051-0.0075in)
Selection parts Transfer case side
Thickness Part No. Thickness Part No. Thickness Part No.
0.80 (0.0315)
0.83 (0.0327)
0.86 (0.0339)
0.89 (0.0350)
0.92 (0.0362)
0.95 (0.0374)
0.98 (0.0386)
1.01 (0.0398)
1.04 (0.0409)
1.07 (0.0421)
1.10 (0.0433)
1.13 (0.0445)
1.16 (0.0457)
1.19 (0.0469)33147 AD300
33147 AD301
33147 AD302
33147 AD303
33147 AD304
33147 AD305
33147 AD306
33147 AD307
33147 AD308
33147 AD309
33147 AD310
33147 AD311
33147 AD312
33147 AD3131.22 (0.0480)
1.25 (0.0492)
1.28 (0.0504)
1.31 (0.0516)
1.34 (0.0528)
1.37 (0.0539)
1.40 (0.0551)
1.43 (0.0563)
1.46 (0.0575)
1.49 (0.0587)
1.52 (0.0598)
1.55 (0.0610)
1.58 (0.0622)
1.61 (0.0634)33147 AD314
33147 AD315
33147 AD316
33147 AD317
33147 AD318
33147 AD319
33147 AD320
33147 AD321
33147 AD322
33147 AD323
33147 AD324
33147 AD360
33147 AD361
33147 AD3621.64 (0.0646)
1.67 (0.0657)
1.70 (0.0669)
1.73 (0.0681)
1.76 (0.0693)
1.79 (0.0705)
1.82 (0.0717)
1.85 (0.0728)
1.88 (0.0740)
1.91 (0.0752)
1.94 (0.0764)
1.97 (0.0776)
2.00 (0.0787)
2.03 (0.0799)33147 AD363
33147 AD364
33147 AD365
33147 AD366
33147 AD367
33147 AD368
33147 AD369
33147 AD370
33147 AD371
33147 AD372
33147 AD373
33147 AD374
33147 AD375
33147 AD376