NISSAN X-TRAIL 2003 Electronic Repair Manual

TROUBLE DIAGNOSIS
BRC-103
[ESP/TCS/ABS]
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4.ACTUATOR RELAY POWER SUPPLY CIRCUIT INSPECTION
1. Disconnect relay box connectors.
2. Check the voltage between the vehicle-side connector and body
ground.
Is inspection result OK?
YES >> GO TO 5.
NO >>
lCheck the fuse 30A.
lCheck for continuity between the battery and the relay box terminal No. 9. If it is not OK,
replace the fuse or harness.
5.ACTUATOR RELAY POWER CIRCUIT CHECK
1. Disconnect connectors for the ESP/TCS/ABS control unit and
the relay box.
2. Check for continuity between the ESP/TCS/ABS control unit
and the relay box (vehicle-side connector).
Is inspection result OK?
OK >> GO TO 6.
NG >> Harness disconnection between the ESP/TCS/ABS control unit and the relay box.
6.ACTUATOR RELAY UNIT INSPECTION
Check the actuator relay as a unit.
Is inspection result OK?
OK >> Check the ESP/TCS/ABS control unit power supply circuit.
NG >> Replace the actuator relay.
SFIA0382E
RELAY BOX
(Vehicle-side connector)Body ground Voltage value
9 – Battery voltage (approx. 12V)
SFIA0383E
ESP/TCS/ABS control unit
(Vehicle-side connector)Relay box
(Vehicle-side connector)Continuity
25Yes
36 7 Yes

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]
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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-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

TROUBLE DIAGNOSIS
BRC-109
[ESP/TCS/ABS]
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BRC
4.CAN COMMUNICATION SYSTEM CHECK
Check “CAN DIAG SUPPORT MNTR” of the data monitor items.
Is inspection result OK?
>> After printing the monitor items, go to CAN SYSTEM. Refer toLAN-14, "CHECK SHEET".
Component CheckEFS001AR
ESP OFF SWITCH
lDisconnect the ESP OFF switch connector. Check for continuity
between the terminal No. 1 and No. 2.
ESP/TCS/ABS RELAY BOX
Disconnect the relay box connectors. Check for continuity, resis-
tance value, and insulation between any pair of terminals in the relay
box.Normal Abnormal (example)
CAN COMM: OK CAN COMM: OK
CAN CIRC 1: OK CAN CIRC 1: UNKWN
CAN CIRC 2: OK CAN CIRC 2: UNKWN
CAN CIRC 5: OK CAN CIRC 5: UNKWN
CAN CIRC 7: OK CAN CIRC 7: UNKWN
1 - 2 Pressing the switch will make a continuity,
and releasing it will stop the continuity.
SFIA0391E
SFIA0392E

BRC-110
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
Continuity and resistance
ESP/TCS/ABS ACTUATOR
Take each connector off from the actuator.Then check electric circulation and resistance in between terminals.
CAUTION:
Confirm that the earth of actuator motor is completely removed.
SFIA0393E
SFIA0398E

TROUBLE DIAGNOSIS
BRC-111
[ESP/TCS/ABS]
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BRC
Continuity and resistance
Check the resistance
SFIA0399E
Standard value (W)
Solenoid valves
Outlet ~ Outlet : 6.0 - 10.0
Outlet ~ Inlet : 9.0 - 16.0
Inlet ~ Inlet : 12.0 - 22.0
ESP switch-over solenoid valve
Primary-side 1 - Secondary-side 1 : 12.0 - 22.0
Primary-side 2 - Secondary-side 2 : 6.0 - 10.0
Primary-side 1 - Primary-side 2, Secondary-side 2 : 9.0 - 16.0
Secondary-side 1 - Primary-side 2, Secondary-side 2 : 9.0 - 16.0

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