2003 NISSAN X-TRAIL sensor

TROUBLE DIAGNOSIS
BRC-95
[ESP/TCS/ABS]
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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-96
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
2.SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect connectors of the yaw rate / side G sensor and the
ESP/TCS/ABS control unit.
2. Check for continuity between the ESP/TCS/ABS control unit
(vehicle-side connector) and the yaw rate / side G sensor (vehi-
cle-side connector).
Is inspection result OK?
OK >> GO TO 3.
NG >> Repair or replace the disconnected harness.
3.YAW RATE SENSOR / SIDE G SENSOR CIRCUIT CHECK
Check that the “YAW RATE SEN” and the “SIDE G-SENSOR” are in normal operation in²DATA MONITOR².
Is inspection result OK?
OK >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NG >> The yaw rate / side G sensor malfunction. After replacing the sensor, perform the self-diagnosis of
the ESP/TCS/ABS control unit again.
SFIA0375E
ESP/TCS/ABS control unit
(Vehicle-side connector)Yaw rate/side G-sensor
(Vehicle-side connector)Continuity
78 1 Yes
77 2 Yes
34 3 Yes
79 4 Yes
18 5 Yes
80 6 Yes
Veh icle stat u sYAW RATE SEN
(DATA MONITOR)SIDE G-SENSOR
(DATA MONITOR)
While the vehicle is
stopped–4 to +4deg/s
–1.1 to +1.1m/s
2
Right turn Negative value Negative value
Left turn Positive value Positive value

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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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

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-112
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
Actuator operation check
1. Connect 19 and 21 terminals of actuator to 40 and 41 terminals
of relay box.
2. Measure the motor voltage (No.4 terminal to body earth ) with
oscilloscope. Then check the motor reverse voltage occasioned
time.
The motor reverse voltage occasioned time is more than 0.1
sec.
CAUTION:
lPerform checking of motor relay unit .Then confirm that
relay functions.
lDriving actuator motor is with in 4 sec to prevent heating
up.
lStandard condition of the motor reverse voltage occa-
sioned time is: Battery voltage is 12V. temperature 20°.
when the battery voltage or temperature is lower than the
standard, the motor reverse voltage occasioned time
becomesslightlyshorter.
Symptom 1: ABS Works Frequently.EFS001AS
Inspection procedure
1.INSPECTION START
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 >> GO TO 2.
NO >> Refer to wheel speed sensor and rotor lines.
2.LOOSENESS INSPECTION
Check the front axle for looseness.
Is inspection result OK?
YES >>BRC-112, "Symptom 2: Unexpected Pedal Action"
NO >> Axle inspection and repair
Symptom 2: Unexpected Pedal ActionEFS001AT
Inspection procedure
1.BRAKE PEDAL STROKE INSPECTION
Check the brake pedal stroke.
Is stroke excessively long?
YES >> Check the bleeding and brake system.
NO >> GO TO 2.
SFIA0400E

TROUBLE DIAGNOSIS
BRC-113
[ESP/TCS/ABS]
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BRC
2.PEDAL FORCE INSPECTION
Check that the brake is effective with the pedal depressed.
Is the pedal heavy, but effective?
YES >> Normal
NO >> GO TO 3.
3.CONNECTOR AND PERFORMANCE INSPECTION
Disconnect the actuator relay unit connector to deactivate the ABS function. Check that the brake is effective.
Is the brake effective?
YES >> GO TO 4.
NO >> Brake line inspection
4.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 5.
5.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 3: Longer Stopping DistanceEFS001AU
Inspection procedure
1.INSPECTION START
Check that the stopping distance when braking becomes longer only on a snowy or gravel road.
Does the stopping distance when braking become longer only on a snowy or gravel road?
YES >> It may be longer than that of vehicle without ABS.
NO >> GO TO 2.
2.PERFORMANCE CHECK
Disconnect the actuator relay box to deactivate the ABS function.
Is the stopping distance still longer?
YES >>lBrake line air bleeding
lBrake line inspection
NO >> GO TO 3.
3.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 4.

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