engine NISSAN X-TRAIL 2003 Electronic Repair Manual

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-89
[ESP/TCS/ABS]
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MA
B
BRC
ABS Warning Lamp, ESP OFF Indicator Lamp, SLIP Indicator Lamp ON/OFF Timing
´:ON –: Lamp OFF
´: Applicable
–: Not applicable
Basic InspectionEFS001A9
PRELIMINARY CHECK 1: (BRAKE FLUID LEVEL AND LEAK INSPECTION)
1. Check the fluid level in the brake reservoir tank. If the fluid level is low, refill the brake fluid.
2. Check the area around the brake piping, ESP/TCS/ABS actuator for leaks. If a leak or oozing is detected,
checkasfollows:
lIf the connections at the ESP/TCS/ABS actuator are loose, tighten the piping to the specified torque.
Then check again for leaks, and make sure that there is no fluid leak.
lIf the flare nuts at the connections and the threads of the ESP/TCS/ABS actuator are damaged, replace
the damaged parts. Then check again for leaks, and make sure that there is no fluid leak.
lIf a leak or oozing is detected on other parts than the ESP/TCS/ABS actuator connections, wipe the
applicable part with a clean cloth. Then check again for leaks, and if there is still a leak or oozing,
replace the damaged part.
lIf a leak or oozing is detected on the ESP/TCS/ABS actuator body, wipe the applicable part with a clean
cloth. Then check again for leaks, and if there is still a leak or oozing, replace the ESP/TCS/ABS actua-
tor body.
CAUTION:
Do not disassemble the actuator body.
3. Check the brake disc rotor and pads.
PRELIMINARY CHECK 2: (INSPECTION FOR LOOSE POWER SUPPLY TERMINAL)
Check the battery for looseness on the battery positive/negative terminals and ground connection. If loose-
ness is detected, tighten the piping to the specified torque. Check that the battery voltage does not drop and
the alternator is normal.
PRELIMINARY CHECK 3: (INSPECTION FOR ABS WARNING LAMP, ESP OFF INDICATOR
LAMP, AND SLIP INDICATOR LAMP)
1. Check that the ABS warning lamp is ON for Approx. 0.5 seconds when the ignition switch is turned ON. If
it does not turn on, check the ABS warning lamp and the circuit, and the combination meter.
2. Check that ESP OFF indicator lamp is ON for Approx. 0.5 seconds when the ignition switch is turned ON.
If it does not turn ON, check the ESP OFF indicator lamp and the circuit, and the combination meter.
3. Check that the SLIP indicator lamp is ON for Approx. 0.5 seconds when the ignition switch is turned ON. If
it does not turn ON, check the SLIP indicator lamp and the circuit.
Condition ABS warning lampESP OFF
indicator lampSLIP indicator lamp Remarks
When the ignition switch is
OFF––– –
After the ignition switch is
turned ON
For Approx. 0.5 seconds´´´–
Ignition switch ON
Approx. 0.5 seconds later––– –
When the ESP OFF switch
turns ON (ESP/TCS function
OFF).–´–Lamp goes off after Approx. 2
seconds when the engine re-start.
ESP/TCS/ABS
malfunction´´´–
´´–When the ESP/TCS/ABS control
unit is abnormal (power supply or
ground malfunction).
When the ESP/TCS ism
abnormal.–´´–

BRC-90
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
4. With the engine running, check the ESP OFF indicator lamp turns ON and OFF when the ESP OFF
switch turns ON and OFF. If it dose not operate in accordance with the switch, check the ESP OFF switch
and the circuit.
5. Check that the ESP OFF indicator lamp turns OFF after Approx. 2 seconds delay when the ESP OFF
switch turned ON (The ESP/TCS system was not operated). If the ESP OFF indicator lamp does not turn
OFF in 10 seconds from the engine start, perform the self-diagnosis of ESP/TCS/ABS control unit.
Inspection 1 Wheel Speed Sensor and CircuitEFS001AB
Inspection procedure
1.SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
Are any self-diagnosis result items above indicated?
>> GO TO 2.
2.CHECK THE CONNECTOR
Remove connectors of the wheel speed sensor which is malfunctioning and the ESP/TCS/ABS control unit.
Check whether the deformation of terminal, or incorporate connection of connectors. Then, connect connec-
tors. In addition, check if the wheel speed sensor cable is damaged due to friction.
Does ABS warning lamp is out when driving 30km/h (49MPH) for Approx. One minute?
YES >> Check is completed.
NO >> GO TO 3.
Self-diagnosis results
CONSULT-II indication item
ABS SENSOR [ABNORMAL SIGNAL]
FR RH SENSOR – 1
FR RH SENSOR – 2
FR LH SENSOR – 1
FR LH SENSOR – 2
RR RH SENSOR – 1
RR RH SENSOR – 2
RR LH SENSOR – 1
RR LH SENSOR – 2

BRC-92
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
5.SENSOR ROTOR INSPECTION
Check sensor rotor tooth for damage.
Is inspection result OK?
YES >> Check the EPS/TCS/ABS control unit connector for disconnect, loose, bent and collapse termi-
nals. Securely connect them again. Perform the ESP/TCS/ABS control unit self-diagnosis again.
NO >> Replace sensor rotor.
Inspection 2 Engine SystemEFS001AC
Inspection procedure
1.SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
Are any items other than above indicated in the self-diagnosis results?
YES >> Repair or replace affected items.
NO >> GO TO 2.
2.SELF-DIAGNOSIS RESULT CHECK 2
1. Perform the ECM self-diagnosis and repair or replace affected items, then perform the ECM self-diagno-
sis again.
2. Perform the ESP/TCS/ABS control unit self-diagnosis again.
Is inspection result OK?
OK >> Inspection End
NG >> Repair or replace affected items. Perform the self-diagnosis again.
Inspection 3 ESP/TCS/ABS Control Unit SystemEFS001AD
Inspection procedure
1.SELF-DIAGNOSIS RESULT CHECK
Check the self-diagnosis results.
Are any items other than
²CONTROLLER FAILURE²indicated in the self-diagnosis results?
YES >> Repair or replace affected items. Perform the self-diagnosis again.
NO >> Replace the ESP/TCS/ABS control unit and perform the ESP/TCS/ABS control unit self-diagno-
sis again.Self-diagnosis results
CONSULT-II indication item
ENGINE SYSTEM 1
ENGINE SYSTEM 2
ENGINE SYSTEM 3
ENGINE SYSTEM 4
ENGINE SYSTEM 6
Self-diagnosis results
CONSULT-II indication item
CONTROLLER FAILURE

TROUBLE DIAGNOSIS
BRC-95
[ESP/TCS/ABS]
C
D
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MA
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-104
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
Inspection 10 Stop Lamp Switch and Circuit
EFS001AL
Inspection procedure
1.SELF-DIAGNOSIS RESULT CHECK
Check the self-diagnosis results.
Is
²STOP LAMP SW²indicated in the self-diagnosis results?
>> GO TO 2.
2.STOP LAMP INSPECTION
1. Disconnect connectors for the stop lamp switch and the ESP/TCS/ABS control unit.
2. Securely connect them again.
3. Start the engine.
4. Repeat depressing the brake pedal carefully several times, then perform the self-diagnosis again.
Is the same self-diagnosis item indicated?
YES >> GO TO 3.
NO >> Repair or replace the poorly connected connector.
3.STOP LAMP SWITCH CIRCUIT CHECK
1. Disconnect connectors for the stop lamp switch and the ESP/
TCS/ABS control unit.
2. Check for continuity between the stop lamp 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 >> Harness disconnection between the ESP/TCS/ABS control unit and the stop lamp switch.
Inspection 11 ESP/TCS/ABS Control Unit Power Supply CircuitEFS001AM
Inspection procedure
1.SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
Is
“BATTERY VOLTTAGE [ABNORMAL]“indicated in the self-diagnosis results?
>> GO TO 2.Self-diagnosis results
CONSULT-II indication item
STOP LAMP SW
SFIA0384E
ESP/TCS/ABS control unit
(Vehicle-side connector)STOP LAMP SW
(Vehicle-side connector)Continuity
48 2 Yes
Self-diagnosis results
CONSULT-II indication item
BATTERY VOLTTAGE [ABNORMAL]

TROUBLE DIAGNOSIS
BRC-105
[ESP/TCS/ABS]
C
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MA
B
BRC
2.SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect the ESP/TCS/ABS control unit connector. Securely connect them again.
2. Perform the self-diagnosis.
Is the same self-diagnosis item indicated?
YES >> GO TO 3.
NO >> Repair or replace the poorly connected connector.
3.ESP/TCS/ABS CONTROL UNIT POWER SUPPLY CIRCUIT INSPECTION 1
1. Disconnect the ESP/TCS/ABS control unit connector.
2. Turn the ignition switch ON (engine not running), and check the
voltage between the ESP/TCS/ABS control unit (vehicle-side
connector) and body ground.
Is inspection result OK?
YES >> GO TO 4.
NO >> GO TO 5.
4.ESP/TCS/ABS CONTROL UNIT GROUND CIRCUIT INSPECTION 1
Check the ESP/TCS/ABS control unit ground circuit.
Is inspection result OK?
OK >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NG >> Harness disconnection or improper installation of the ESP/TCS/ABS control unit.
SFIA0385E
ESP/TCS/ABS control unit
(Vehicle-side connector)Body ground Voltage value
1 – Battery voltage (approx. 12V)
SFIA0386E
ESP/TCS/ABS control unit
(Vehicle-side connector)Body ground Continuity
28 – Yes
29 – Yes

BRC-108
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
Inspection 15 CAN Communication Circuit, ESP/TCS/ABS Control Unit and
Steering Angle Sensor
EFS001C6
Inspection procedure
1.SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
Are any items other than above indicated in self-diagnosis results?
YES >> Repair or replace affected items.
NO >> GOTO 2.
2.CHECK HARNESS AND CONNECTORS BETWEEN ESP/TCS/ABS CONTROL UNIT AND STEERING
ANGLE SENSOR.
1. Turn the ignition switch OFF, and disconnect the battery nega-
tive terminal.
2. Disconnect the ESP/TCS/ABS control unit connector and the
steering angle sensor connector.
3. Check the harness between the ESP/TCS/ABS control unit and
the steering angle sensor for open and short circuit.
4. Check connectors for the control unit and the sensor.
–Check the connector housing for disconnected, loose, bent, and
collapsed terminals.
Is inspection result OK?
OK >> GO TO 3.
NG >> Repair disconnected harness or poorly connected connectors. GO TO 3.
3.SELF-DIAGNOSIS RESULT CHECK 2
1. Connect connectors to the control unit and the sensor.
2. Connect the battery negative terminal, and turn the ignition switch ON.
3. After erasing the self-diagnosis result, start the engine to perform the self-diagnosis again.
Is only
²ST ANGLE SEN COM CIR²indicated in the self-diagnosis results?
YES >> Replace the spiral cable (with the steering angle sensor) and adjust the neutral position of the
steering angle sensor. Refer toBRC-54, "
ON-VEHICLE SERVICE".
NO >> GO TO 4.Self-diagnosis results
CONSULT-II indication item
CAN COMM CIRCUIT
ST ANG SEN COM CIR
SFIA0389E
ESP/TCS/ABS control unit
(Vehicle-side connector)Steering angle sensor
(Vehicle-side connector)Continuity
23Yes
61 4 Yes
63 5 Yes

BRC-114
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
4.WHEEL SPEED SENSOR INSPECTION
Check the wheel speed sensor system.
lSensor mounting inspection
lSensor pick-up inspection for iron chips
lSensor rotor inspection (e.g. Number of teeth, damaged teeth)
lSensor connector engagement inspection
Is inspection result OK?
YES >> Normal
NO >> Wheel speed sensor and rotor lines repair
Symptom 4: ABS Does Not Work.EF S0 01 AV
Inspection procedure
1.ABS WARNING LAMP INDICATOR INSPECTION
Check that the ABS warning lamp illuminates.
Does the ABS warning lamp illuminate?
YES >> Perform the self-diagnosis.
NO >> GO TO 2.
2.WHEEL SPEED SENSOR INSPECTION
Check the wheel speed sensor system.
lSensor mounting inspection
lSensor pick-up inspection for iron chips
lSensor rotor inspection (e.g. Number of teeth, damaged teeth)
lSensor connector engagement inspection
Is inspection result OK?
YES >> Normal
NO >> Wheel speed sensor and rotor lines repair
Symptom 5: Pedal Vibration and NoiseEFS001AW
Inspection procedure
1.SYMPTOM CHECK
Check the brake system for pedal vibration or noise at the engine start.
Is inspection result OK?
YES >> Perform the self-diagnosis.
NO >> GO TO 2.
2.SYMPTOM CHECK 2
Check the brake system for pedal vibration or noise when the pedal depressed lightly (just put a foot on).
CAUTION:
Under the following driving conditions, the wheel speed will fluctuates, resulting in ABS activation.
lWhen shifting gears
lHigh speed cornering
lWhenagustofwind
Is inspection result OK?
YES >> GO TO 3.
NO >> Normal

TROUBLE DIAGNOSIS
BRC-115
[ESP/TCS/ABS]
C
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MA
B
BRC
3.SYMPTOM CHECK 3
Does the symptom appear during normal braking operation?
CAUTION:
ABS may work in following driving conditions even if there is no sudden brake.
lWhen road friction is low.
lHigh speed cornering
lWhenagustofwind
Is inspection result OK?
YES >> GO TO 4.
NO >> Normal
4.SYMPTOM CHECK 4
Check that the symptom is reproduce when the engine speed is increased with the vehicle stopped.
Is inspection result OK?
YES >> GO TO 5.
NO >>
lNormal.
CAUTION:
This symptom may appear with vehicle stopped.
5.SYMPTOM CHECK 5
Check that the symptom is reproduce when any switch of electrical equipment is operated.
Is inspection result OK?
YES >> Check that there are no radio, antenna, and antenna lead-in wires (including wiring) near control
unit.
NO >> GO TO 6.
6.ABS WARNING LAMP INSPECTION
Check that the ABS warning lamp turns on.
Is inspection result OK?
YES >> Perform the self-diagnosis.
NO >> GO TO 7.
7.WHEEL SPEED SENSOR INSPECTION
Check the wheel speed sensor system.
lSensor mounting inspection
lSensor pick-up inspection for iron chips (e.g. Number of teeth, damaged teeth)
lSensor connector engagement inspection
lWheel speed sensor path harness and connector inspection
Is inspection result OK?
YES >> Normal
NO >> Wheel speed sensor and rotor lines repair
Symptom 6: ESP OFF Indicator Lamp Does Not IlluminateEFS001AX
Inspection procedure
1.ESP OFF INDICATOR LAMP INSPECTION
Disconnect the ESP/TCS/ABS control unit connector.
Does the ABS warning lamp and ESP OFF indicator lamp illuminate?
YES >> ESP/TCS/ABS control unit malfunction. Repair or replace the control unit.
NO >> Combination meter system malfunction. Check the combination meter.