Page 969 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-101
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2.SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect connectors for the ESP/TCS/ABS control unit and the actuator. Securely connect them aga NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-101
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2.SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect connectors for the ESP/TCS/ABS control unit and the actuator. Securely connect them aga](/manual-img/5/57402/w960_57402-968.png)
TROUBLE DIAGNOSIS
BRC-101
[ESP/TCS/ABS]
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2.SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect connectors for the ESP/TCS/ABS control unit and the actuator. Securely connect them again.
2. Perform the self-diagnosis again.
Are any self-diagnosis items indicated again?
YES >> GO TO 3.
NO >> Repair or replace the poorly connected connector.
3.ACTUATOR MOTOR, MOTOR 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?
OK >> GO TO 4.
NG >>
lCheck the fuse 50A.
lCheck for continuity between the battery and the relay box terminal No. 10.
4.ACTUATOR MOTOR AND MOTOR RELAY 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,
the relay, and the actuator (vehicle-side connector).
Is inspection result OK?
YES >> GO TO 5.
NO >> Harness malfunction between the ESP/TCS/
ABS control unit, the relay box and the actuator.
SFIA0379E
Relay box
(Vehicle-side connector)Body ground Voltage value
10 – Battery voltage (approx. 12V)
ESP/TCS/ABS
control unit
(Vehicle-side
connector)Relay box
(Vehicle-side
connector)Actuator
(Vehicle-side
connector)Continuity
20 4 — Yes
78—Yes
— 41 [RHD] 21 [RHD] Yes
SFIA0380E
Page 970 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual BRC-102
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
5.MOTOR RELAY UNIT INSPECTION
Check the motor relay as a unit.
Is inspection result OK?
YES >> Check the ESP/TCS/ABS control unit power supply circuit.
NO >> Re NISSAN X-TRAIL 2003 Electronic Repair Manual BRC-102
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
5.MOTOR RELAY UNIT INSPECTION
Check the motor relay as a unit.
Is inspection result OK?
YES >> Check the ESP/TCS/ABS control unit power supply circuit.
NO >> Re](/manual-img/5/57402/w960_57402-969.png)
BRC-102
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
5.MOTOR RELAY UNIT INSPECTION
Check the motor relay as a unit.
Is inspection result OK?
YES >> Check the ESP/TCS/ABS control unit power supply circuit.
NO >> Replace the motor relay.
Inspection 9 Actuator Relay and CircuitEFS001AK
Inspection procedure
1.SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
Is
²MAIN RELAY²indicated in the self-diagnosis results?
>> GO TO 2.
2.SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect the ESP/TCS/ABS control unit connector. Securely connect them again.
2. Perform the ESP/TCS/ABS control unit self-diagnosis again.
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 GROUND CIRCUIT INSPECTION
Check the ESP/TCS/ABS control unit ground circuit.
Is inspection result OK?
OK >> GO TO 4.
NG >> Poorly connection on the ESP/TCS/ABS control unit connector or harness disconnection.Self-diagnosis results
CONSULT-II indication item
MAIN RELAY
SFIA0381E
ESP/TCS/ABS control unit
(Vehicle-side connector)Body ground Continuity
28 – Yes
29 – Yes
Page 971 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-103
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4.ACTUATOR RELAY POWER SUPPLY CIRCUIT INSPECTION
1. Disconnect relay box connectors.
2. Check the voltage between the vehicle-side co 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 co](/manual-img/5/57402/w960_57402-970.png)
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
Page 972 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual 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 SW²indi NISSAN X-TRAIL 2003 Electronic Repair Manual 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 SW²indi](/manual-img/5/57402/w960_57402-971.png)
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]
Page 973 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-105
[ESP/TCS/ABS]
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2.SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect the ESP/TCS/ABS control unit connector. Securely connect them again.
2. Perform the sel NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-105
[ESP/TCS/ABS]
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2.SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect the ESP/TCS/ABS control unit connector. Securely connect them again.
2. Perform the sel](/manual-img/5/57402/w960_57402-972.png)
TROUBLE DIAGNOSIS
BRC-105
[ESP/TCS/ABS]
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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
Page 974 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual 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/TC NISSAN X-TRAIL 2003 Electronic Repair Manual 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/TC](/manual-img/5/57402/w960_57402-973.png)
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
Page 975 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-107
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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 NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-107
[ESP/TCS/ABS]
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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](/manual-img/5/57402/w960_57402-974.png)
TROUBLE DIAGNOSIS
BRC-107
[ESP/TCS/ABS]
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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
Page 976 of 3066
![NISSAN X-TRAIL 2003 Electronic Repair Manual 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 NISSAN X-TRAIL 2003 Electronic Repair Manual 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](/manual-img/5/57402/w960_57402-975.png)
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