2003 NISSAN X-TRAIL steering

TROUBLE DIAGNOSIS
BRC-79
[ESP/TCS/ABS]
C
D
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G
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MA
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BRC
CAUTION:
If the memory cannot be erased, go to step 6.
10. Drive the vehicle at Approx. 30 km/h (19 MPH) and check that the ABS warning lamp, ESP OFF indicator
lamp, and SLIP indicator lamp stay off.
CAUTION:
ESP OFF switch is not cancelled.
Self-Diagnostic Items to Result Mode
Self-Diagnostic item Malfunction detecting condition Check route
FR LH SENSOR – 1 Circuit of front LH wheel speed sensor is open.
Wheel speed sensor and
circuit. Refer toBRC-90
RR RH SENSOR – 1 Circuit of rear RH wheel speed sensor is open.
FR RH SENSOR – 1 Circuit of front RH wheel speed sensor is open.
RR LH SENSOR – 1 Circuit of rear LH wheel speed sensor is open.
FR LH SENSOR – 2Front LH wheel speed sensor is shorted or input signal is abnor-
mal.
RR RH SENSOR – 2Rear RH wheel speed sensor is shorted or input signal is abnor-
mal.
FR RH SENSOR – 2Front RH wheel speed sensor is shorted or input signal is abnor-
mal.
RR LH SENSOR – 2Rear LH wheel speed sensor is shorted or input signal is abnor-
mal.
MAIN RELAYDuring the actuator relay operation with OFF, when the actuator
relay turns ON. Or when the control line for the relay is shorted to
the ground.Actuator relay and cir-
cuit. Refer toBRC-102
During the actuator relay operation with ON, when the actuator
relay turns OFF. Or when the control line for the relay is open.
STOP LAMP SW Stop lamp switch circuit is open.Stop lamp switch and cir-
cuit. Refer toBRC-104
PRESS SEN CIRCUITPressure sensor signal line is open or shorted, or pressure sen-
sor is abnormal.Pressure sensor and cir-
cuit. Refer toBRC-93
ST ANGLE SEN CIRCUITNeutral position of the steering angle sensor is dislocated, or the
steering angle sensor is abnormal.Steering angle sensor
and circuit. Refer to
BRC-94
YA W R AT E S E N O RYaw rate sensor is abnormal, or the yaw rate sensor signal line is
open or shorted.Yaw rate/transverse
acceleration sensor and
circuit. Refer toBRC-95

BRC-80
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
FR LH IN ABS SOLCircuit of the front LH wheel inlet solenoid valve is open or
shorted, or the control line is open or shorted to the power supply
or the ground.
Solenoid valve and cir-
cuit. Refer toBRC-97
FR LH OUT ABS SOLCircuit of the front LH wheel outlet solenoid valve is open or
shorted, or the control line is open or shorted to the power supply
or the ground.
RR RH IN ABS SOLCircuit of the rear RH wheel inlet solenoid valve is open or
shorted, or the control line is open or shorted to the power supply
or the ground.
RR RH OUT ABS SOLCircuit of the rear RH wheel outlet solenoid valve is open or
shorted, or the control line is open or shorted to the power supply
or the ground.
FR RH IN ABS SOLCircuit of the front RH wheel inlet solenoid valve is open or
shorted, or the control line is open or shorted to the power supply
or the ground.
FR RH OUT ABS SOLCircuit of the front RH wheel outlet solenoid valve is open or
shorted, or the control line is open or shorted to the power supply
or the ground.
RR LH IN ABS SOLCircuit of the rear LH wheel inlet solenoid valve is open or
shorted, or the control line is open or shorted to the power supply
or the ground.
RR LH OUT ABS SOLCircuit of the rear LH wheel outlet solenoid valve is open or
shorted, or the control line is open or shorted to the power supply
or the ground.
USV LINE [FL-RR]ESP switch-over solenoid valve 1 on the primary side is open cir-
cuit or shorted, or the control line is open or shorted to the power
supply or the ground.
ESP switch-over sole-
noid valve and circuit.
Refer toBRC-97
. USV LINE [FR-RL]ESP switch-over solenoid valve 1 on the secondary side is open
circuit or shorted, or the control line is open or shorted to the
power supply or the ground.
HSV LINE [FL-RR]ESP switch-over solenoid valve 2 on the primary side is open cir-
cuit or shorted, or the control line is open or shorted to the power
supply or the ground.
HSV LINE [FR-RL]ESP switch-over solenoid valve 2 on the secondary side is open
circuit or shorted, or the control line is open or shorted to the
power supply or the ground.
PUMP MOTOR
ACTUATOR RLY (note)During the actuator motor operation with ON, when the actuator
motor turns OFF. Or when the control line for actuator motor relay
is open.Actuator motor, motor
relay, and circuit. Refer
toBRC-100
During the actuator motor operation with OFF, when the actuator
motor turns ON. Or when the control line for relay is shorted to
ground.
ABS SENSOR
[ABNORMAL SIGNAL]Wheel speed sensor input is abnormal.Wheel speed sensor and
circuit. Refer toBRC-90
BATTERY VOLTAGE
[ABNORMAL]ESP/TCS/ABS control unit battery voltage is too low.ESP/TCS/ABS control
unit battery voltage cir-
cuit and ground circuit.
Refer toBRC-104
ST ANGLE SEN SIGNALNeutral position correction of steering angle sensor is not fin-
ished.Neutral position adjust-
ment of steering angle
sensor. Refer toBRC-
106
ST ANG SEN COM CIRCAN communication system or steering angle sensor is abnor-
mal.Steering angle sensor
and CAN communication
circuit. Refer toBRC-108
Self-Diagnostic item Malfunction detecting condition Check route

BRC-82
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
Data Monitor Items to be Displayed
Data Monitor Item (Unit)Data Monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELECTION
FROM
MENUCAN DIAG
SUPPORT
MNTR
GEAR´´´– “1” is displayed.
SLCT LVR POSI´´´– “##” is displayed.
FR RH SENSOR
(km/h,MPH)´´´–Wheel speed calculated by
front RH wheel speed sensor
signal is displayed.
FR LH SENSOR
(km/h, MPH)´´´–Wheel speed calculated by
front LH wheel speed sensor
signal is displayed.
RR RH SENSOR
(km/h, MPH)´´´–Wheel speed calculated by
rear RH wheel speed sensor
signal is displayed.
RR LH SENSOR
(km/h, MPH)´´´–Wheel speed calculated by
rear LH wheel speed sensor
signal is displayed.
ACCEL POS SIG
(%)´´´–Throttle valve open/close sta-
tus judged by the CAN com-
munication signal is
displayed.
ENGINE RPM
(rpm)´´´–Engine speed judged by the
CAN communication signal is
displayed.
CAN COM START
(ON/OFF)–´´–Communication status of CAN
communication is displayed.
STR ANGLE SIG
(deg)´´´–Steering angle detected by
the steering angle sensor is
displayed.
YAW R AT E S E N
(d/s)´´´–Yaw rate detected by the yaw
rate sensor is displayed.
SIDE G-SENSOR
(m/s
2)´´´–Transverse acceleration
detected by the side G sensor
is displayed.
PRESS SENSOR
(bar )´´´–Brake fluid pressure detected
by the pressure sensor is dis-
played.
BATTERY VOLT
(V )´´´–Voltage supplied to ESP/TCS/
ABS control unit is displayed.
MOTOR RELAY
(ON/OFF )–´´–Motor relay signal (ON/OFF)
status is displayed.
ACTUATOR RLY
(ON/OFF )–´´–Actuator relay signal (ON/
OFF) status is displayed.
STOP LAMP SW
(ON/OFF)´´´–Stop lamp switch (ON/OFF)
status is displayed.
PARK BRAKE SW
(ON/OFF)´´´–Parking brake switch (ON/
OFF) status is displayed.
OFF SW
(ON/OFF)´´´–ESP OFF switch (ON/OFF)
status is displayed.
ABS WARN LAMP
(ON/OFF)–´´–ABS warning lamp (ON/OFF)
status is displayed.
OFF LAMP
(ON/OFF)–´´–ESP OFF indicator lamp (ON/
OFF) status is displayed.

BRC-88
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
For Correct and Quick Diagnosis
EFS001A8
PRECAUTIONS FOR TROUBLE DIAGNOSIS
lBefore performing the trouble diagnosis, always read theGI-3, "PRECAUTIONS"to confirm the general
precautions.
lAfter replacement of ESP/TCS/ABS control unit, steering angle sensor, steering parts, suspension parts,
or tires, and adjustment of alignment, always adjust the neutral position of steering angle sensor before
driving.
lWhen the ESP/TCS/ABS control unit is replaced, check that the label on the computer unit is identical
color.
lAfter completing the trouble diagnosis, always erase the malfunctioning memory.BRC-77, "Functions of
CONSULT-II"
lWhen inspection of the continuity or voltage between units is performed, check the connector terminals for
disconnection, looseness, bend, or collapse. If any malfunction is detected, repair or replace the applica-
ble part.
lIntermittent problems may be caused by a malfunction on harness, connector, or terminal. Move the har-
nesses, harness connectors, or terminals by hand to make sure that there is no contact malfunction.
lIf a circuit tester is used for the check, be careful not to forcibly extend any connector terminal.
lFor self-diagnosis, active test, and work support of ESP/TCS/ABS control unit with CONSULT-II, stop and
connect CONSULT-II and select²ABS².
lCONSULT-II self-diagnosis results are displayed without regard to occurrence timing. In some case, the
later ones (timing value is small) appear on the next screen.
lWhile the self-diagnosis results of CONSULT-II shows a malfunction, if CONSULT-II active test is per-
formed, an engine system malfunction may be indicated. In this case, start the engine to resume the nor-
mal screen.
lESP/TCS/ABS system electronically controls the brake operation and engine output. The following symp-
toms may be caused by the normal operations.
Symptom Symptom description Result
Motor operation noiseDuring ESP, TCS, or ABS operation, sometimes a faint noise can be
heard. This is a motor operation noise in the ESP/TCS/ABS actuator.
Normal
Just after the engine starts, the motor operating noise may be heard.
This is a normal status of the system operation check.
System operation check
noiseWhen the engine starts, a²click²noise may be heard from the engine
compartment. This is a normal status of the system operation check.Normal
ESP/TCS operation
(SLIP lamp ON)When the vehicle is passing through a road where the surface friction
coefficient varies or the wheel speed changes suddenly by downshifting
or depressing of the accelerator pedal fully, TCS may be activated tem-
porarily.
Normal
Cancel the ESP/TCS
function for the
inspection on a chas-
sis dynamometer. Before the speedometer inspection, turn ESP OFF switch off to cancel
the ESP/TCS function.
When the accelerator pedal is depressed on a chassis dynamometer,
the vehicle speed will not increase. This is not malfunction, because
TCS is activated by the wheel speed difference between front and rear.
The warning lamp may also illuminate to show²sensor system failure²in
this case. This is not malfunction either, because the stationary front
wheels are detected. Restart the engine, and drive the vehicle at 30 km/
h or higher to check that the warning lamp no longer illuminates.
ABS operation (Longer stop-
ping distance)The stopping distance may be longer for the vehicles with ABS when the
vehicle is driver on snowy and rough road. When driving on the road like
that, slow down the speed.Normal
Sluggish feelDepending on road circumstances, the driver may have a sluggish feel.
This is not abnormal, because the optimum traction has the highest pri-
ority (safety first) by TCS operation. Sometimes the driver has a slight
sluggish feel against the substantial accelerator pedal operation.Normal

BRC-94
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
4.PRESSURE SENSOR INSPECTION
Check the “PRESS SENSOR” value in²DATA MONITOR².
Is inspection result OK?
OK >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NG >> Pressure sensor malfunction. Replace the ESP/TCS/ABS actuator (with the pressure sensor).
Inspection 5 Steering Angle Sensor and the Circuit between Steering Angle
Sensor and ESP/TCS/ABS Control Unit.
EFS001AF
Inspection procedure
1.SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
Perform inspection 15.
Refer toBRC-108, "
Inspection 15 CAN Communication Circuit, ESP/TCS/ABS Control Unit and Steering
Angle Sensor".
Is
²ST ANG SEN CIRCUIT²indicated in the self-diagnosis results.
>> GO TO 2.
2.SELF-DIAGNOSIS RESULT CHECK 2
1. Repair or replace the poorly connected connector
–Check the connector housing for disconnect, loose, bent and collapse terminals
If any malfunction are detected, repair or replace the applicable part.
2. Perform the ESP/TCS/ABS control unit self-diagnosis again.
Is inspection result OK?
OK >> Inspection END
NG >> GO TO 3.Condition PRESS SENSOR (Data monitor)
Brake pedal depressed Positive value
Brake pedal released Approx. 0 bar
Self-diagnosis results
CONSULT-II indication item
ST ANG SEN CIRCUIT

TROUBLE DIAGNOSIS
BRC-95
[ESP/TCS/ABS]
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B
BRC
3.STEERING ANGLE SENSOR CURCUIT CHECK
1. Disconnect the ESP/TCS/ABS control unit connector and the
steering angle sensor connector.
2. Check for continuity between the ESP/TCS/ABS control unit
(vehicle-side connector) and the steering angle sensor (vehicle-
side connector).
Is inspection result OK?
OK >> GO TO 4.
NG >> Repair or replace the disconnected harness.
4.DATA MONITOR CHECK
Perform the²STR ANGLE SIG²value in²DATA MONITOR²and check that it is in normal condition.
Is inspection result OK?
OK >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NG >> Replace the spiral cable (with the steering angle sensor) and adjust the neutral position of steer-
ing angle sensor.BRC-54, "
Adjustment of Neutral Position of Steering Angle Sensor".
Inspection 6 Yaw Rate Sensor/ Side G sensor and the Circuit between Yaw Rate
Sensor/ Side G sensor and ESP/TCS/ABS Control Unit.
EFS001AG
Inspection procedure
1.SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
CAUTION:
When the vehicle on a turn-table at an entrance of parking lot or on a moving unit, the ESP OFF indica-
tor lamp turns ON, and the self-diagnosis with CONSULT-II may indicate that the yaw rate sensor sys-
tem is malfunction. In this case, the yaw rate sensor is not malfunction. Move the vehicle from the
turn-table or other moving unit, and restart the engine. This will return the status normal.
Are
²YAW R AT E S E N S O R²and²SIDE G-SEN CIRCUIT²indicated in the self-diagnosis results.
>> GO TO 2.
SFIA0374E
ESP/TCS/ABS control unit
(Vehicle-side connector)Steering angle sensor
(Vehicle-side connector)Continuity
61 4 Yes
63 5 Yes
Steering condition STR ANGLE SIG (Data monitor)
Straight-ahead – 5deg to + 5deg
Turn the wheel to the right by 90°. Approx. + 90deg
Turn the wheel to the left by 90°. Approx. - 90deg
Self-diagnosis results
CONSULT-II indication item
YAW RATE SENSOR
SIDE G-SEN CIRCUIT

BRC-106
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
5.ESP/TCS/ABS CONTROL UNIT POWER SUPPLY CIRCUIT INSPECTION 2
1. Check the fuse 10A.
2. Check for continuity between the battery positive terminal and
the ESP/TCS/ABS control unit connector.
Is inspection result OK?
YES >> Check the battery for a loose terminal and low voltage or the alternator for abnormality.
NO >>
lReplace the fuse 10A.
lHarness disconnection
Inspection 12 When “EMERGENCY BRAKE” is indicated in the Self-Diagnosis
Results
EFS001AO
Inspection procedure
1.SELF-DIAGNOSIS RESULT CHECK
Check the self-diagnosis results.
When any items other than²EMERGENCY BRAKE²is displayed in the self-diagnosis results, follow the
instructions below.
CAUTION:
²EMERGENCY BRAKE²is indicated when the control unit itself is detected internal error. If this display
item was indicated, replace the control unit.
Is
²EMERGENCY BRAKE²is indicated in the self-diagnosis results?
>> Replace the ESP/TCS/ABS control unit, and perform the self-diagnosis again.
Inspection 13 When “ST ANG SEN SIGNAL” is Indicated in the Self-Diagnosis
Results
EFS001AP
Inspection procedure
1.SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
When any items other than
²ST ANGLE SEN SIGNAL²is displayed in the self-diagnosis results:
YES >> Check and repair the applicable items. Perform the self-diagnosis again.
NO >> Perform the steering angle sensor neutral position adjustment. GO TO 2.
SFIA0387E
ESP/TCS/ABS control unit
(Vehicle-side connector)Battery terminal Continuity
1 positive Yes
Self-diagnosis results
CONSULT-II indication item
EMERGENCY BRAKE
Self-diagnosis results
CONSULT-II indication item
ST ANGLE SEN SIGNAL

TROUBLE DIAGNOSIS
BRC-107
[ESP/TCS/ABS]
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MA
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BRC
2.SELF-DIAGNOSIS RESULT CHECK 2
Turn the ignition switch OFF, and ON to erase the self-diagnosis results. And perform the ESP/TCS/ABS con-
trol unit self-diagnosis again.
Is the same self-diagnosis item indicated again?
YES >> After replacing the spiral cable (with the steering angle sensor), perform the neutral position
adjustment. Then conduct the self-diagnosis again.
NO >> Inspection End
Inspection 14 Brake Fluid Level of Reservoir Tank, Communication Circuit
between ESP/TCS/ABS Control Unit and Brake Fluid Level Warning Switch
EFS001AQ
Inspection procedure
1.SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
Does the brake warning light turn on?
YES >> Check the pad for wear. Check the brake fluid for leakage.
NO >> GO TO 2.
2.SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect connectors for the brake fluid level warning switch and the ESP/TCS/ABS control unit.
2. Securely connect connectors. Perform the ESP/TCS/ABS control unit self-diagnosis again.
Is the same self-diagnosis item indicated again?
YES >> Poor connection of connector. Repair or replace the poorly connected connector.
NO >> GO TO 3.
3.CIRCUIT CHECK BETWEEN BRAKE FLUID LEVEL WARNING SWITCH AND ESP/TCS/ABS CON-
TROL UNIT
1. Disconnect connectors for the brake fluid level warning switch
and the ESP/TCS/ABS control unit.
2. Check for continuity between the brake fluid level warning switch (vehicle-side connector) and the ESP/
TCS/ABS control unit (vehicle-side connector).
Is inspection result OK?
OK >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NG >> Repair or replace the disconnected harness.Self-diagnosis results
CONSULT-II indication item
BR FLUID LEVEL LOW
SFIA0388E
ESP/TCS/ABS control unit
(Vehicle-side connector)Brake fluid level warning switch
(Vehicle-side connector)Continuity
40 1 Yes