2003 NISSAN X-TRAIL Electronic Repair Manual

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Page 3009 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual ALL MODE 4X4 SYSTEM
TF-39
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TDWA0005E

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NISSAN X-TRAIL 2003 Electronic Repair Manual TF-40
TROUBLE DIAGNOSIS
TROUBLE DIAGNOSIS
PFP:00004
Fail-safe functionEDS000H4
lIf a malfunction occurs in 4WD electrical system, and control unit detects the malfunction, 4WD warning
lamp on gauge tu

Page 3011 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
TF-41
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Trouble diagnosis chart by symptomEDS0 00 IT
Symptom Condition Check items Reference page
When ignition switch is turned ON,
4WD mode indicator lamp d

TROUBLE DIAGNOSIS
TF-41
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Trouble diagnosis chart by symptomEDS0 00 IT
Symptom Condition Check items Reference page
When ignition switch is turned ON,
4WD mode indicator lamp does not
illuminate for approx. 1 second (4WD
mode lamp check)IGN-ON
lBlown 4WD mode indicator lamp bulb
lBlown fuse between ignition and 4WD mode
indicator lamp
lOpen circuit in wiring between ignition and
4WD mode indicator lampTF-54, "
4WD
INDICATOR
LAMP DOSE
NOT COME ON
FOR APPROXI-
MATELY 1
SECOND
WHEN THE
IGNITION
SWITCH IS
TURNED TO
ON"
4WD warning lamp does not illuminate
with ignition switch ON.IGN-ON
lMalfunction 4WD warning lamp circuit.
lBlown fuse between ignition and 4WD warn-
ing lamp
lOpen circuit in wiring between ignition and
4WD warning lamp
lOpen circuit in wiring between 4WD warning
lamp and 4WD actuator relay
lDisconnected 4WD actuator relay
lOpen circuit in wiring between 4WD actuator
relay and body groundTF-55, "
4WD
WAR NIN G
LAMP DOES
NOT ILLUMI-
NATE WITH
IGNITION ON"
4WD warning lamp does not go out
several seconds after engine is started.
(4WD mode indicator lamp goes out.)Engine runningl4WD control unit connector disconnected
lMalfunction presented in 4WD systemTF-55, "
4WD
WAR NIN G
LAMP DOES
NOT GO OUT
SEVERAL SEC-
ONDS AFTER
ENGINE
STARTED.(4W
DMODEINDI-
CATOR LAMP
GOES OUT)"
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).lEngine running
lAUTO mode
lSteering wheel
fully turned
lOperation is not in AUTO mode (in 2WD or
LOCK mode).
lThrottle position signal error
lMechanical malfunction of electronically con-
trolled coupling
lMalfunction present in 4WD systemTF-56, "
HEAVY
TIGHT-COR-
NER 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"
4WD mode cannot be switched after
engine is started (Note 3)Engine running
l4WD mode change-over switch is discon-
nected.
lOpen circuit between 4WD mode change-
over switch and 4WD control unit
lOpen circuit between 4WD mode change-
over switch and body groundTF-57, "
4WD
MODES CAN-
NOT BE
SWITCHED
AFTER
ENGINE IS
STARTED"

Page 3012 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TF-42
TROUBLE DIAGNOSIS
NOTE:
1. Light tight-corner braking symptom may occur depending on driving conditions in AUTO mode. This is not
malfunction.
2. Heavy tight-corner braking symptom occurs when v

Page 3013 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
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REFERENCE STANDARD TABLE
Specifications defined by circuit tester
NOTE:
*1:If a circuit tester for measuring voltage is used for the check, do not for

TROUBLE DIAGNOSIS
TF-43
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REFERENCE STANDARD TABLE
Specifications defined by circuit tester
NOTE:
*1:If a circuit tester for measuring voltage is used for the check, do not forcibly extend any connector terminals.
*2:4WD warning lamp ON/OFF timing
*3:Unit name is indicated by the one used in circuit diagram (4WD solenoid valve). However, it is "E-TS SOLE
NOID" in CONSULT-II data.
Te r m i n a l N o .
Location
Standard*1(Note) Check points when
result was malfunctioning
+-
3 Power supply Ignition switch ON Battery voltage (approx. 12V)Control unit power supply
circuit
11 5
Body
grou
ndGround - Control unit ground circuit 11 3
111
108
106
104
74WD warning lamp
*24WD warning lamp ON
4WD warning lamp OFFApprox. 0V
Battery voltage (approx. 12V)4WD warning lamp and
harness
16AUTO indicator
lampAUTO indicator lamp ON
AUTO indicator lamp OFFApprox. 0V
Battery voltage (approx. 12V)AUTO indicator lamp and
harness
6LOCK indicator
lampLOCK indicator lamp ON
LOCK indicator lamp OFFApprox. 0V
Battery voltage (approx. 12V)LOCK indicator lamp and
harness
1024WD solenoid valve
(E-TS solenoid
valve)
*3At vehicle stop engine idling Battery voltage (approx. 12V)4WD actuator relay sole-
noid valve and harness
18 4WD actuator relay At vehicle stop engine idling 2 V or lower4WD actuator relay and
harness
2 G-sensor power
supply1
At ignition switch ON (vehicle hori-
zontal stop condition)Approx. 8 V
G-sensor and harness
32 Longitudinal G-sen-
sor 1Approx. 2.5V
22Throttle position
sensorWide open throttle
Closed throttleApprox. 4.0 V
Approx. 0.5 VThrottle position sensor
and harness
24Parking brake
switchIn parking position
In other than parking position-Parking brake switch and
harness
264WD mode change-
over switch AUTO4WD mode change-over switch:
2WD
4WD mode change-over switch:
other than 2WDSW ON: Approx. 0 V
SW OFF: Approx. 5 V4WD mode change-over
switch and circuit
274WD mode change-
over switch LOCK4WD mode change-over switch:
LOCK
4WD mode change-over switch:
Other than LOCKSW ON: Approx. 0 V
SW OFF: Approx. 5 V4WD mode change-over
switch and circuit
39CAN communica-
tion L line---
48CAN communica-
tion H line---
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)

Page 3014 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TF-44
TROUBLE DIAGNOSIS
Specifications defined by CONSULT-II
Check air pressure of tire under normal condition.Items to be monitored ContentsData monitor
(Reference)
Check points when result
was malfu

TF-44
TROUBLE DIAGNOSIS
Specifications defined by CONSULT-II
Check air pressure of tire under normal condition.Items to be monitored ContentsData monitor
(Reference)
Check points when result
was malfunctioning ConditionReference values in
normal operation
DECEL G-SENSOR (G)G-sensor operating
conditionWith vehicle stopped
on flat road.±0.15 G G-sensor and harness
THRTL POS SEN (V)Throttle valve open/
close conditionClosed throttle to wide
open throttleWhen closed throttle:
Approx. 0.5V
Throttle position sensor
and harness
When wide open throt-
tle: Approx. 4.0 V
ENGINE SPEED SIG
(STOP/RUN)With engine runningEngine speed below
400 rpmSTOP
Engine speed signal circuit
Engine speed 400 rpm
or higherRUN
E-TS ACTUATOR (ON/OFF)4WD actuator relay
(4WD actuator relay)
activation conditionVehicle stop (Ignition
switch ON)OFF4WD actuator relay (4WD
actuator relay) and har-
ness
Engine running ON
G-SEN VOLT (V)G-sensor power sup-
ply conditionWith vehicle stopped
on flat road.Approx. 8V (reference
value)G-sensor and harness
BATTERY VOL (V)Battery voltage sup-
plied to control unitIgnition switch ON Approx. 10 - 16 VControl unit power supply
circuit
4WDWARNLAMP(ON/
OFF)4WD warning lamp
ON condition4WD warning lamp
ONON4WD warning lamp and
harness
Refer to "4WD Warning
Lamp". 4WD warning lamp
OFFOFF
4WD MODE SW
(AUTO LOCK 2WD)Input condition of
4WD mode change-
over switchEngine running, vehi-
cle stopped, switch
pressed–4WD mode change-over
switch and circuit
4WD MODE MONI (AUTO,
LOCK, 2WD)Output condition of
4WD mode indicator
lamp signalEngine running, vehi-
cle stoppedUsing 4WD mode
change-over switch4WD mode indicator lamp
and circuit
DIS-TIRE MONI (mm)Improper size tire
installed condition–0-4mm,4-8mm,
8mm -Front/Rear tire size differ-
ence, wear condition
PBRAKESW(ON/OFF)Parking brake switch
operating conditionParking brake
depressedON
Parking brake switch and
harness
Parking brake not
depressedOFF
SPEED MTR O/P (km/h)Output condition of
vehicle speed for
speedometerWhile vehicle is
stopped0km/h(0MPH)
Speedometer and harness
Vehicle runningAlmost in accordance
with the wheel speed
sensor display
ABS 4WD COMMEPS/TCS/ABS con-
trol unit operating con-
ditionIgnition switch ON OKESP/TCS/ABS control unit
and circuit
CAN COMM (OK-NG)CAN communication
signal conditionIgnition switch ON OKCAN communication sig-
nal (OK-NG) condition is
displayed

Page 3015 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
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CONSULT-II functionsEDS000HA
CONSULT-II FUNCTION APPLICATION TABLE
SELF-DIAGNOSIS
Operation procedure
1. After turning ignition switch OFF, connect CO

Page 3016 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TF-46
TROUBLE DIAGNOSIS
CAUTION:
If memory cannot be erased, proceed to 5.
9. Drive at approx. 30 km/h (19MPH) for approx. 1 minute. Be sure 4WD warning lamp is OFF.
Display item list
CAUTION:
lIf "AL

TF-46
TROUBLE DIAGNOSIS
CAUTION:
If memory cannot be erased, proceed to 5.
9. Drive at approx. 30 km/h (19MPH) for approx. 1 minute. Be sure 4WD warning lamp is OFF.
Display item list
CAUTION:
lIf "ALL MODE 4WD" is not displayed on system selection screen, check the following: 4WD actua-
tor and control unit, data link connector harness, and No. of CONSULT-II program card
lWhen several systems including CAN communication system indicates troubles, perform trouble
diagnosis of the CAN communication primarily.
DATA MONITOR
lFor details of data monitor function, refer to CONSULT -II Operation 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 the 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.
6. Touch "DATA MONITOR".
7. Return to monitor item selection screen. Touch any of "ECU INPUT SIGNALS," "MAIN SIGNALS," "CAN
DIG SUPPORT MNTR" or "SELECTION FROM MENU".
Refer to the following "Data monitor item chart".
Item Malfunction detecting condition Check harness
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)Current supplied to 4WD solenoid valve is abnormally high or
low compared with the specification.
CONTROL UNIT Processing function of 4WD control unit is malfunctioning.4WD control unit, power
and ground circuits
DECEL G-SEN MONI Output voltage of longitudinal G-sensor is outside specification. G-sensor harness
DECEL G-SEN IN Input voltage of longitudinal G-sensor is outside specification. G-sensor harness
3 V POWER SUPLY CHECK 4WD control unit internal 3V power supply is malfunctioning.Control 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 circuit in 4WD solenoid valve.
CAN COMM
lCAN communication function of 4WD control unit is malfunc-
tioning.
lCAN communication function of EPS control unit is malfunc-
tioning.Control unit power sup-
ply circuit
ABS 4WD COMMWheel speed sensor system of ESP/TCS/ABS control unit is
malfunctioning.ESP/TCS/ABS control
unit and harness

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