NISSAN X-TRAIL 2003 Electronic Repair Manual

TROUBLE DIAGNOSIS
BRC-13
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
TFWA0003E

BRC-14
[4WD/ABS]
TROUBLE DIAGNOSIS
TFWA0004E

TROUBLE DIAGNOSIS
BRC-15
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
TFWA0005E

BRC-16
[4WD/ABS]
TROUBLE DIAGNOSIS
TFWA0006E

TROUBLE DIAGNOSIS
BRC-17
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
TFWA0007E

BRC-18
[4WD/ABS]
TROUBLE DIAGNOSIS
Trouble Diagnosis Chart by Symptom
EFS001BF
When ABS and 4WD warning lamps illuminate, perform self-diagnosis.
Symptom Condition Check items Reference page
When ignition switch is turned ON,
drive mode indicator lamp does not illu-
minate for Approx. 1 second (drive
mode lamp check)IGN-ON
lBlown drive mode indicator lamp bulb
lBlown fuse between ignition and drive mode
indicator lamp
lOpen circuit of wiring between ignition and
drive mode indicator lampBRC-42
ABS warning lamp does not illuminate
with ignition ON. (ABS warning lamp
check)IGN-ON
lBlown ABS warning lamp bulb
lBlown fuse between ignition and ABS warning
lamp.
lOpen circuit of wiring between ignition and
ABS warning lamp.
lMalfunction in ABS systemBRC-42
ABS warning lamp illuminates with
ignition ON, but does not illuminates
after a few seconds. (ABS warning
lamp has not illuminated.)IGN-ONl4WD/ABS control unit connector discon-
nected
lMalfunction in ABS systemBRC-42
4WD warning lamp does not illuminate
with ignition ON.IGN-ON
lBlown 4WD warning lamp bulb
lBlown fuse between ignition and 4WD warn-
ing lamp
lOpen circuit in wire between ignition and 4WD
warning lamp
lOpen circuit in wire between 4WD warning
lamp and 4WD actuator relay
lDisconnected 4WD actuator relay
lOpen circuit in wire between 4WD actuator
relay and body groundBRC-43
4WD warning lamp does not go out
several seconds after engine is started.
(Drive mode indicator lamp goes out.)Engine runningl4WD/ABS control unit connector discon-
nected
lMalfunction present in 4WD systemBRC-43
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 run-
ning
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 systemBRC-44
Drive modes cannot be switched after
engine is started.Engine running
lDrive mode change-over switch is discon-
nected.
lOpen circuit between drive mode change-over
switch and 4WD /ABS control unit
lOpen circuit between drive mode change-over
switch and body groundBRC-45
Vehicle running, 4WD warning lamp
flashes rapidly. (When it flashes for
Approx. One minute, then does not illu-
minate.) Rapid flashing: Two times
flashing per 1 secondEngine running
(to other than
2WD mode)Protection function was activated due to heavy
load to electronically controlled coupling. (4WD
system is not malfunctioning.)BRC-45

TROUBLE DIAGNOSIS
BRC-19
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
CAUTION:
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 vehicle is driven in the following conditions:
LOCK mode, steering wheel is turned fully to either sides, and accelerator pedal was depressed.
4WD/ABS Control Unit Input/Output Signal StandardEFS001BG
4WD/ABS CONTROL UINT CONNECTOR TERMINAL ARRANGEMENT
CAUTION:
When ignition switch is turned to ON with connectors of 4WD/ABS control unit and actuator con-
nected.
REFERENCE STANDARD TABLE
Specifications defined by circuit tester
Vehicle running, 4WD warning lamp
flashes slowly. (When it flashes for
Approx. One minute, then does not illu-
minate.)Slow flashing: One flashing
per 2 secondslEngine run-
ning
lDriving at
vehicle speed
30km/hTire size is different for front and rear of vehicle.BRC-45
Vehicle does not enter 4WD mode
even though 4WD warning lamp is off.Engine runningMechanical malfunction of electronically con-
trolled coupling (Mechanical engagement of
clutch is not possible.)BRC-46
Symptom Condition Check items Reference page
SFIA0351E
Terminal No.
Location Standard (note 1)(Note) Check
points when result
was malfunctioning +-
3.
109Power supply Ignition switch ONBattery voltage (Approx.
12V)Control unit power
supply circuit

BRC-20
[4WD/ABS]
TROUBLE DIAGNOSIS
11 5
Body
groundGround -Control unit ground
path 11 3
111
108
106
104
13 Stop lamp signalDepress the brake pedal.
Release brake pedal.Battery voltage (Approx.
12V)
Approx. 0VStop lamp switch
and path
5ABS MOTOR
RELAYABS motor actuated
(byactivetestmodeofCONSULT)
ABS motor stopped (Ignition switch is in
ON)Approx. 2 V or less
Battery voltage (Approx.
12V)ABS motor, motor
relay and harness
17ABS ACTUATOR
RELAYWhen actuator relay is active.
(the engine running)
When actuator relay is inactive.
(In fail-safe mode, before starting
engine)Approx. 2 V or less
Battery voltage (Approx.
12V)ABS actuator relay
and harness
11 6Front RH wheel IN
solenoid
Actuator is activated (by active test
mode of CONSULT) or actuator relay is
not activated
(In fail-safe mode, before starting
engine)
Actuator is not activated and actuator
relay is activated (Vehicle stopped with
engine running)Approx. 0V
Battery voltage (Approx.
12V)ABS solenoid valve
path 11 4Front RH wheel
OUT solenoid
11 2Front LH wheel IN
solenoid
11 0Front LH wheel
OUT solenoid
107Rear RH wheel IN
solenoid
105Rear RH wheel
OUT solenoid
103Rear LH wheel IN
solenoid
101Rear LH wheel
OUT solenoid
74WD warning lamp
(Note 2)4WD warning lamp ON
4WD warning lamp OFFApprox. 0V
Battery voltage (Approx.
12V)4WD warning lamp
and harness
4ABS warning lamp
(Note 3)ABS warning lamp ON
ABS warning lamp OFFApprox. 0V
Battery voltage (Approx.
12V)ABS warning lamp
and path
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
46 37 FR RH SENSOR
At vehicle rotating (Approx. 30km/h)Pulse generation
Approx. 200HzSpeed sensor and
harness 34 43FR LH SENSOR
[OPEN]
36 45 RR RH SENSOR
44 35 RR LH SENSOR Te r m i n a l N o .
Location Standard (note 1)(Note) Check
points when result
was malfunctioning +-

TROUBLE DIAGNOSIS
BRC-21
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
CAUTION:
1. If a circuit tester for measuring voltage is used for the check, do not forcibly extend any connector
terminals.
CAUTION:
2. 4WD warning lamp ON/OFF timing
CAUTION:
3. ABS warning lamp ON/OFF timing
CAUTION:
4. Unit name is indicated by the name used in circuit diagram (4WD solenoid valve). However, it is “E-
TS solenoid” in CONSULT-II data.
Specifications defined by CONSULT
102
Body ground
4WD solenoid valve
(E-TS solenoid
valve)At vehicle stop engine idlingBattery voltage (Approx.
12V)4WD actuator relay
solenoid valve and
harness
18 4WD actuator relay At vehicle stop engine idling 2 V or lower4WD actuator relay
and harness
2
4G - sensor power
supply
At ignition switch ON (vehicle horizontal
stop condition)Approx. 8 V
G -sensor and har-
ness
32Longitudinal G -
sensorApprox. 2.5V
41 G -sensor ground Approx. 0V
22Throttle position
sensorWide open throttle
Closed throttleApprox. 4.0 V
Approx. 0.5 VThrottle position
sensor and har-
ness
24Parking brake
switchIn parking position
In other than parking position-Parking brake
switch and harness
26Drive mode
change-over switch
AUTODrive mode change-over switch: 2WD
Drive mode change-over switch: other
than 2WDSW ON: Approx. 0 V
SW OFF: Approx. 5 VDrive mode
change-over switch
and path
27Drive mode
change-over switch
LOCKDrive mode change-over switch: LOCK
Drive mode change-over switch: other
than LOCKSW ON: Approx. 0 V
SW OFF: Approx. 5 VDrive mode
change-over switch
and path
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)
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)
Terminal No.
Location Standard (note 1)(Note) Check
points when result
was malfunctioning +-
Items to be monitored ContentsData monitor
(Reference)
Check points when result
was malfunctioning ConditionReference values in
normal operation
Wheel speed sensor
FR,
FL, RR, RL (km/h)Vehicle wheel speedWhen the vehicle is
stopped0km/h
Wheel speed sensor and
harness
While driving (note:1)Almost in accordance
with speedometer dis-
play (within±10%)
LONGITUDINAL G-
SENSOR (4WD mod-
els)G -sensor operating
conditionWith vehicle stopped
on flat road.plus; 0.15 G G -sensor and harness

BRC-22
[4WD/ABS]
TROUBLE DIAGNOSIS
Throttle position sen-
sor [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
Stop lamp switch Brake pedal statusDepress the brake
pedal.ON
Stop lamp switch and path
Release brake pedal. OFF
ENGINE RPM SIG-
NAL [STOP/RUN]With engine runningEngine RPM below
400 rpmSTOP
Engine RPM signal path
Engine RPM 400 rpm
or higherRUN
ABS inlet S/V
FR, FL, RR, RL (ON/
OFF)
Solenoid valve opera-
tionActuator (solenoid
valve) is activated (by
active test mode of
CONSULT) or actua-
tor relay is not acti-
vated (in fail-safe
mode, before starting
engine)ON
ABS solenoid valve path
ABS outlet S/V
FR, FL, RR, RL (ON/
OFF)Actuator (solenoid
valve) is not activated
and actuator relay is
activated (vehicle
stopped with (Engine
running)OFF
E-TS solenoid valve
(A)
(4WD solenoid valve)4WD solenoid valve
current supply moni-
toring conditionIn LOCK mode, at
starting vehicle (when
accelerator pedal was
depressed)Approx. 2.8 AE-TS solenoid valve (4WD
solenoid valve) and har-
ness
ABS actuator relay
(ON/OFF)Actuator relay acti-
vatedVehicle stopped
Ignition switch ONOFF
ABS actuator relay and
harness
Vehicle stopped
Engine runningON
ABS motor relay (ON/
OFF)Motor relay and motor
activated(Ignition switch ON or
engine is running):
ABS inactiveOFF
ABS motor and motor relay
harness
(Ignition switch ON or
engine is running):
ABS activeON
E-TS actuator relay
(4WD actuator relay)
(ON/OFF)E-TS actuator relay
(4WD actuator relay)
activation conditionVehicle stopped (Igni-
tion switch ON)OFFE-TS actuator relay (4WD
actuator relay) and har-
ness
Engine running ON
Warninglamp(ON/
OFF)ABSwarninglampON
condition (Note 2)ABS warning lamp ON ON
ABS warning lamp and
path ABS warning lamp
OFF conditionOFF
G-SENSOR POWER
(4WD) [V]G -sensor power sup-
ply conditionWith vehicle stopped
on flat road.Approx. 8V (reference
value)G -sensor and harness
POWER VOLTAGE
(V)Battery voltage sup-
plied to control moduleIgnition switch ON Approx. 10 - 16 VControl unit power supply
circuit
4WD WARNING
LAMP [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 SWITCH
(ON/OFF)Input condition of drive
mode change-over
switchEngine running, vehi-
cle stopped, switch
pressed-Drive mode change-over
switch and path