2003 NISSAN X-TRAIL steering wheel

TROUBLE DIAGNOSIS
BRC-77
[ESP/TCS/ABS]
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BRC
(Note 1): Check the pressure of the tire in normal condition.
(Note 2): ON/OFF timing of the ABS warning lamp
ON: For approximately 0.5 seconds after the ignition switch is turned ON, or when a malfunction is detected.
OFF: Approximately 0.5 seconds after the ignition switch is turned ON (when the system is in normal operation).
(Note 3): ON/OFF timing of the ESP OFF indicator lamp
ON: For approximately 0.5 seconds after the ignition switch is turned ON, or when a malfunction is detected ESP OFF switch is ON.
OFF: Approximately 0.5 seconds after the ignition switch is turned ON (when the system is in normal operation) or when ESP OFF
switch is OFF.
(Note 4): SLIP indicator lamp ON/OFF timing
ON: For approximately 0.5 seconds after the ignition switch is turned ON, or when a malfunction is detected.
OFF: Approximately 0.5 seconds after the ignition switch is turned ON (when the system is in normal operation) and ESP/TCS function
is not activated.
Flashing: ESP/TCS function is active during driving.
Functions of CONSULT-IIEFS001A7
CONSULT-II MAINLY FUNCTION APPLICATION TO ESP/TCS/ABS
´: Applicable
–: Not applicableFLUID LEV SWBrake fluid level warn-
ingswitchstatus.When brake fluid level warning
switch is ON.ON
Brake fluid level warning
switch, brake warning
lamp and circuit. When brake fluid lever warning
switch is OFF.OFF
EBD FAIL SIG
ABS FAIL SIG
TCS FAIL SIG
VDC FAIL SIGSystem fail signal sta-
tusMalfunctions condition
(When system failed)OFFEBD system
ABS system
TCS system
ESP system Data monitor item ContentsData monitor
(Reference) Check items
for malfunction
ConditionReference value in
normal operation
Item Self-diagnosis Data monitor Active test
Wheel speed sensors´´–
Solenoid valves´´´
Switch-over solenoid valves´´´
Stop lamp switch´´–
Ya w r a te s e n s o r´´´
Side G sensor´´´
Press sensor´´´
Steering angle sensor´´´
Actuator relay´´´
Motor relay´´´
ABS warning lamp –´´
Battery voltage´´–
ESP/TCS/ABS C/U´––
ESP/TCS/ABS actuator motor´´´
CAN communication´´–
Engine speed signal –´–
ESP OFF switch –´–
ESP OFF indicator lamp –´´
SLIP indicator lamp –´´
Throttle angle –´–

TROUBLE DIAGNOSIS
BRC-79
[ESP/TCS/ABS]
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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

TROUBLE DIAGNOSIS
BRC-95
[ESP/TCS/ABS]
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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

EC-24
[QR (WITH EURO-OBD)]
ENGINE CONTROL SYSTEM
System Chart
EBS00B0Q
*1: This sensor is not used to control the engine system under normal conditions.
*2: These signals are sent to the ECM through CAN communication line.
Multiport Fuel Injection (MFI) SystemEBS00B0R
INPUT/OUTPUT SIGNAL CHART
*1: Under normal conditions, this sensor is not for engine control operation.
*2: This signal is sent to the ECM through CAN communication line.Input (Sensor) ECM Function Output (Actuator)
lCamshaft position sensor (PHASE)
lCrankshaft position sensor (POS)
lMass air flow sensor
lEngine coolant temperature sensor
lHeated oxygen sensor 1
lThrottle position sensor
lAccelerator pedal position sensor
lPark/neutral position (PNP) switch
lIntake air temperature sensor
lPower steering pressure sensor
lIgnition switch
lBattery voltage
lKnock sensor
lRefrigerant pressure sensor
lHeated oxygen sensor 2 *1
lTCM (Transmission control module) *2
lESP/TCS/ABS control unit *2
lWheel sensor
lAir conditioner switch
lElectrical loadFuel injection & mixture ratio control Fuel injectors
Electronic ignition system Power transistors
Fuel pump control Fuel pump relay
On board diagnostic system MI (On the instrument panel)
Heated oxygen sensor 1 heater control Heated oxygen sensor 1 heater
Heated oxygen sensor 2 heater control Heated oxygen sensor 2 heater
EVAP canister purge flow controlEVAP canister purge volume control
solenoid valve
Air conditioning cut control Air conditioner relay
Cooling fan control Cooling fan relays
Sensor Input Signal to ECMECM func-
tionActuator
Crankshaft position sensor (POS)
Engine speed
Piston position
Fuel injec-
tion & mix-
ture ratio
controlFuel injectors Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Ignition switch Start signal
Knock sensor Engine knocking condition
Battery Battery voltage
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2 *1 Density of oxygen in exhaust gas
ESP/TCS/ABS control unit *2 ESP/TCS operation command
Wheel sensor Vehicle speed
Air conditioner switch Air conditioner operation

ENGINE CONTROL SYSTEM
EC-27
[QR (WITH EURO-OBD)]
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EC
Electronic Ignition (EI) SystemEBS00B0S
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
The ignition timing is controlled by the ECM to maintain the best air-
fuel ratio for every running condition of the engine. The ignition tim-
ing data is stored in the ECM. This data forms the map shown.
The ECM receives information such as the injection pulse width and
camshaft position sensor signal. Computing this information, ignition
signals are transmitted to the power transistor.
e.g.,N:1,800rpm,Tp:1.50msec
A°BTDC
During the following conditions, the ignition timing is revised by the
ECM according to the other data stored in the ECM.
lAt starting
lDuring warm-up
lAt idle
lAt low battery voltage
lDuring acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
Air Conditioning Cut ControlEBS00B0T
INPUT/OUTPUT SIGNAL CHART
SYSTEM DESCRIPTION
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.
Sensor Input Signal to ECMECM func-
tionActuator
Crankshaft position sensor (POS)
Engine speed
Piston position
Ignition
timing con-
trolPower transistor Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Ignition switch Start signal
Knock sensor Engine knocking
Park/neutral position (PNP) switch Gear position
Battery Battery voltage
Wheel sensor Vehicle speed
SEF742M
Sensor Input Signal to ECM ECM function Actuator
Air conditioner switch Air conditioner “ON” signal
Air conditioner
cut controlAir conditioner relay Throttle position sensor Throttle valve opening angle
Crankshaft position sensor (POS) Engine speed
Engine coolant temperature sensor Engine coolant temperature
Ignition switch Start signal
Refrigerant pressure sensor Refrigerant pressure
Power steering pressure sensor Power steering operation
Wheel sensor Vehicle speed