2001 NISSAN X-TRAIL sensor

BRC-96
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
4. PRESSURE SENSOR INSPECTION
Check the “PRESS SENSOR” value in “DATA MONITOR”.
Is inspection result OK?
YES >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NO >> Pressure sensor malfunction. Replace the ESP actuator (with the pressure sensor).
Inspection 5 Steering wheel Angle Sensor and the Circuit between Steering
Wheel 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 to BRC-110, "
Inspection 15 CAN Communication Circuit, ESP/TCS/ABS Control Unit and Steering
Wheel Angle Sensor" .
Is
“ST ANG SEN CIRCUIT” indicated 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?
YES >> Inspection END
NO >> 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-97
[ESP/TCS/ABS]
C
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BRC
3.STEERING WHEEL ANGLE SENSOR CIRCUIT CHECK
1. Disconnect the ESP/TCS/ABS control unit connector and the steering wheel angle sensor connector.
2. Check for continuity between the ESP/TCS/ABS control unit
(vehicle-side connector B111) and the steering wheel angle sen-
sor (vehicle-side connector M81).
3. Check for continuity between the steering wheel angle sensor
and ground.
Is inspection result OK?
YES >> GO TO 4.
NO >> Repair or replace the disconnected harness.
4.DATA MONITOR CHECK
Perform the “STR ANGLE SIG” value in “DATA MONITOR” and check that it is in normal condition.
Is inspection result OK?
YES >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NO >> Replace the spiral cable (with the steering wheel angle sensor) and adjust the neutral position of
steering wheel angle sensor. BRC-57, "
Adjustment of Neutral Position of Steering Wheel Angle
Sensor" .
SFIA0899E
ESP/TCS/ABS control unit
(Vehicle-side connector B111)Steering wheel angle sensor
(Vehicle-side connector M81)Continuity
2 (Y/R) 3 (Y/R) Yes
SFIA0898E
Steering wheel angle sensor
(Vehicle-side connector M81)ground Continuity
2 (B) — Yes
Steering condition STR ANGLE SIG (Data monitor)
Straight-ahead – 5 deg to + 5 deg
Tun the wheel to the right by 90°Approx. + 90 deg
Tun the wheel to the left by 90°Approx. – 90 deg

BRC-98
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
Inspection 6 Yaw Rate Sensor and Side G sensor and the Circuit between Yaw
Rate Sensor and 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
“ YAW RATE SENSOR ” and “ SIDE G-SEN CIRCUIT ” indicated in the self-diagnosis results.
>> GO TO 2.
2. SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect connectors of the yaw rate and side G sensor and
the ESP/TCS/ABS control unit.
2. Check for continuity between the ESP/TCS/ABS control unit
(vehicle-side connector B111) and the yaw rate and side G sen-
sor (vehicle-side connector B112).
Is inspection result OK?
YES >> GO TO 3.
NO >> Repair or replace the disconnected harness.
Self-diagnosis results
CONSULT-II indication item
YAW RATE SENSOR
SIDE G-SEN CIRCUIT
SFIA0916E
ESP/TCS/ABS control unit
(Vehicle-side connector B111)Yaw rate and side G-sensor
(Vehicle-side connector B112)Continuity
78 (L/B) 1 (L/B) Yes
77 (Y/B) 2 (Y/B) Yes
34 (OR) 3 (OR) Yes
79 (LG/R) 4 (LG/R) Yes
18 (GY/L) 5 (GY/L) Yes
80 (W/R) 6 (W/R) Yes

TROUBLE DIAGNOSIS
BRC-99
[ESP/TCS/ABS]
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BRC
3.YAW RATE SENSOR AND SIDE G SENSOR CIRCUIT CHECK
Check that the “YAW RATE SEN” and the “SIDE G-SENSOR” are in normal operation in “DATA MONITOR”.
Is inspection result OK?
YES >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NO >> The yaw rate and side G sensor malfunction. After replacing the sensor, perform the self-diagno-
sis of the ESP/TCS/ABS control unit again.
Inspection 7 Solenoid Valve, ESP Switch-over Solenoid Valve and CircuitEFS001AI
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.SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect the ESP/TCS/ABS control unit connector and solenoid valve connectors. Securely connect
them again.
2. Perform the self-diagnosis again.
Are any self-diagnosis result items indicated again?
YES >> GO TO 3.
NO >> Repair or replace the poorly connected connector.Vehicle statusYAW R AT E S E N
(DATA MONITOR) SIDE G-SENSOR
(DATA MONITOR)
While the vehicle is stopped
– 4 to + 4 deg/s
–1.1 to + 1.1 m/s
2
Right turn Negative value Negative value
Left turn Positive value Positive value
Self-diagnosis results
CONSULT-II indication item
FR LH IN ABS SOL
FR LH OUT ABS SOL
RR RH IN ABS SOL
RR RH OUT ABS SOL
FR RH IN ABS SOL
FR RH OUT ABS SOL
RR LH IN ABS SOL
RR LH OUT ABS SOL
USV LINE [FL-RR]
USV LINE [FR-RL]
HSV LINE [FL-RR]
HSV LINE [FR-RL]

BRC-108
[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 (vehicle-side connector B111).
Is inspection result OK?
YES >> Check the battery for a loose terminal and low voltage or the alternator for abnormality.
NO >>
●Replace the fuse 10A.
●Harness 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 than “EMERGENCY BRAKE” is displayed in the self-diagnosis results, follow the
instructions below.
CAUTION:
“EMERGENCY BRAKE” is indicated when the control unit itself is detected internal error. If this dis-
play item was indicated, replace the control unit.
Is
“EMERGENCY BRAKE” is 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
“ST ANGLE SEN SIGNAL” is displayed in the self-diagnosis results:
YES >> Check and repair the applicable items. Perform the self-diagnosis again.
NO >> Perform the steering wheel angle sensor neutral position adjustment. GO TO 2.
SFIA0924E
ESP/TCS/ABS control unit
(Vehicle-side connector B111)Battery terminal Continuity
1 (G/R) positive Yes
Self-diagnosis results
CONSUL-II indication item
EMERGENCY BRAKE
Self-diagnosis results
CONSUL-II indication item
ST ANGLE SEN SIGNAL

TROUBLE DIAGNOSIS
BRC-109
[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 wheel 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 >> GO TO 3.
NO >> Poor connection of connector. Repair or replace the poorly connected connector.
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 E19) and the
ESP/TCS/ABS control unit (vehicle-side connector B111).
Is inspection result OK?
YES >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NO >> Repair or replace the disconnected harness.
Self-diagnosis results
CONSUL-II indication item
BR FLUID LEVER LOW
SFIA0925E
ESP/TCS/ABS control unit
(Vehicle-side connector B111)Brake fluid level warning switch
(Vehicle-side connector E19)Continuity
40 (Y/B) 1 (Y/B) Yes

BRC-110
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
Inspection 15 CAN Communication Circuit, ESP/TCS/ABS Control Unit and
Steering Wheel 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 >> GO TO 2.
2. CHECK HARNESS AND CONNECTORS BETWEEN ESP/TCS/ABS CONTROL UNIT AND STEERING
WHEEL 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 wheel angle sensor connector.
3. Check the harness between the ESP/TCS/ABS control unit
(vehicle-side connector B111) and the steering wheel angle sen-
sor (vehicle-side connector M81) 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?
YES >> GO TO 3.
NO >> 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
“ST ANGLE SEN COM CIR” indicated in the self-diagnosis results?
YES >> Replace the spiral cable (with the steering wheel angle sensor) and adjust the neutral position of
the steering wheel angle sensor. Refer to BRC-57, "
ON-VEHICLE SERVICE" .
NO >> GO TO 4.
Self-diagnosis results
CONSUL-II indication item
CAN COMM CIRCUIT
ST ANG SEN COM CIR
SFIA0904E
ESP/TCS/ABS control unit
(Vehicle-side connector B111)Steering wheel angle sensor
(Vehicle-side connector M81)Continuity
2 (Y/R) 3 (Y/R) Yes

BRC-114
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
Actuator operation check
1. Connect 9 and 10 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:
●Perform checking of motor relay unit. Then confirm that
relay functions.
●Driving actuator motor is with in 4 sec. to prevent heating
up.
●Standard 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
becomes slightly shorter.
Symptom 1: ABS Works Frequently.EFS001AS
Inspection procedure
1. INSPECTION START
Check the wheel sensor system.
●Sensor mounting inspection
●Sensor pick-up inspection for iron chips
●Sensor rotor inspection (e.g. Number of teeth, damaged teeth)
●Sensor connector engagement inspection
Is inspection result OK?
YES >> GO TO 2.
NO >> Refer to wheel sensor and rotor lines.
2. LOOSENESS INSPECTION
Check the front axle for looseness.
Is inspection result OK?
YES >>BRC-114, "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.
SFIA0910E