NISSAN X-TRAIL 2003 Service Repair Manual

TROUBLE DIAGNOSIS
BRC-97
[ESP/TCS/ABS]
C
D
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MA
B
BRC

3. SOLENOID VALVE INPUT SIGNAL CHECK.
1. Disconnect ESP/TCS/ABS control unit connector.
2. Turn ignition switch ON and check the voltage between ESP/
TCS/ABS control unit and body ground.
Is inspection result OK?
YES >> Check ESP/TCS/ABS control unit power supply circuit.
NO >> GO TO 4.
SFIA2193E
ESP/TCS/ABS control unit
(harness connector E122)Body ground Voltage
26 (W/G) –
Battery voltage (approx.12V) 5 (G/OR) –
6 (PU/W) –
53 (P) –
55 (R/Y) –
3 (Y/G) –
4 (GY/R) –
25 (LG) –
49 (B/W) –
50 (R/G) –
54 (W/L) –
52 (PU) –

BRC-98
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

4. SOLENOID VALVE LINE CHECK
1. Disconnect connectors for ESP/TCS/ABS control unit and ESP actuator.
2. Check for continuity between ESP/TCS/ABS control unit and
ESP actuator (harness connector E67and E68).
Is inspection result OK?
YES >> GO TO 5.
NO >> Harness disconnection between ESP/TCS/ABS control unit and the actuator
SFIA2194E
ESP/TCS/ABS control unit
(harness connector E122)ESP Actuator
(harness connector E67 and E68)Continuity
26 (W/G) 3 (W/G) Yes
5 (G/OR) 1 (G/OR) Yes
6 (PU/W) 7 (PU/W) Yes
53 (P) 5 (P) Yes
55 (R/Y) 15 (R/Y) Yes
3 (Y/G) 14 (Y/G) Yes
4 (GY/R) 17 (GY/R) Yes
25 (LG) 16 (LG) Yes
49 (B/W) 26 (B/W) Yes
50 (R/G) 25 (R/G) Yes
54 (W/L) 28 (W/L) Yes
52 (PU) 27 (PU) Yes

TROUBLE DIAGNOSIS
BRC-99
[ESP/TCS/ABS]
C
D
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MA
B
BRC

5. ACTUATOR SOLENOID INSPECTION
1. Disconnect ESP actuator connector and ESP relay box harness connector.
2. Check the resistance value at ESP actuator.
Is inspection result OK?
YES >> Perform ESP/TCS/ABS control unit self-diagnosis again.
NO >> Replace ESP actuator assembly.
Inspection 8 Actuator Motor, Motor Relay and CircuitEFS001AJ
Inspection procedure
1. SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
NOTE:
“ACTUATOR RLY” on the CONSULT-II self-diagnosis results indicates the malfunction of the actuator relay
and circuit.
Are
“PUMP MOTOR” and “ACTUATOR RLY” (NOTE) indicated in the self-diagnosis results?
YES >> GO TO 2.
NO >> INSPECTION END.
SFIA2181E
ESP Actuator
(Actuator side)ESP Relay box
(harness connector E57)Resistance
3(W/G)
406.0 – 11Ω
1(G/OR) 6.0 – 11Ω
7(PU/W) 6.0 – 11Ω
5(P) 6.0 – 11Ω
15(R/Y) 3.0 – 5.0Ω
14(Y/G) 3.0 – 5.0Ω
17(GY/R) 3.0 – 5.0Ω
16(LG) 3.0 – 5.0Ω
26(B/W) 6.0 – 11.0Ω
25(R/G) 6.0 – 11.0Ω
28(W/L) 3.0 – 5.0Ω
27(PU)) 3.0 – 5.0Ω
Self-diagnosis results
PUMP MOTOR
ACTUATOR RLY (NOTE)

BRC-100
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

2. SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect connectors for 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 harness connectors.
2. Check the voltage between the harness connector E55 and
body ground.
Is inspection result OK?
YES >> GO TO 4.
NO >>

Check the fuse 50A.

Check for the continuity between battery and relay box terminal No. 10.
4. ACTUATOR MOTOR AND MOTOR RELAY CIRCUIT CHECK
1. Disconnect connectors for ESP/TCS/ABS control unit and the
relay box.
2. Check for continuity between ESP/TCS/ABS control unit, the
relay.
Is inspection result OK?
YES >> GO TO 5.
NO >> Harness malfunction between ESP/TCS/ABS control unit, the ESP relay box.
5. MOTOR RELAY UNIT INSPECTION
Check the motor relay as a unit.
Is inspection result OK?
YES >> Check ESP/TCS/ABS control unit power supply circuit.
NO >> Replace the motor relay.
SFIA2206E
ESP Relay box
(harness connector E55)Body ground Voltage value
10 (W/R) – Battery voltage (approx. 12V)
ESP/TCS/ABS
control unit
(harness
connector E122)ESP relay box
(harness
connector E56and
E57)Continuity
20 (R/B) 4 (R/B) Yes
7 (G/W) 8 (G/W) Yes
SFIA2182E

TROUBLE DIAGNOSIS
BRC-101
[ESP/TCS/ABS]
C
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MA
B
BRC

Inspection 9 Actuator Relay and CircuitEFS001AK
Inspection procedure
1. SELF-DIAGNOSIS RESULT CHECK 1
Check the self-diagnosis results.
Is
“MAIN RELAY” indicated in the self-diagnosis results?
YES >> GO TO 2.
NO >> INSPECTION END.
2. SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect ESP/TCS/ABS control unit connector. Securely connect them again.
2. Perform 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
1. Disconnect ESP/TCS/ABS control unit connector.
2. Check ESP/TCS/ABS control unit ground circuit.
Is inspection result OK?
YES >> GO TO 4.
NO >> Poor connection on ESP/TCS/ABS control unit connector or harness disconnection.
Self-diagnosis results
MAIN RELAY
SFIA2195E
ESP/TCS/ABS control unit
(harness connector E122)Body ground Continuity
28 (B) – Yes
29 (B) – Yes

BRC-102
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

4. ACTUATOR RELAY POWER SUPPLY CIRCUIT INSPECTION
1. Disconnect the relay box connectors.
2. Check the voltage between the harness connector and body
ground.
Is inspection result OK?
YES >> GO TO 5.
NO >>

Check the fuse 30A.

Check for the continuity between 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 ESP/TCS/ABS control unit and the
relay box.
2. Check for continuity between ESP/TCS/ABS control unit and
the relay box.
Is inspection result OK?
YES >> GO TO 6.
NO >> The harness disconnection between 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?
YES >> Check ESP/TCS/ABS control unit power supply circuit.
NO >> Replace the actuator relay.
SFIA2183E
RELAY BOX
(harness connector E55)Body ground Voltage value
9 (BR) – Battery voltage (approx. 12V)
SFIA2184E
ESP/TCS/ABS control unit
(harness connector E122)ESP relay box
(harness connector E56)Continuity
2 (Y/R) 5 (Y/R) Yes
36 (L/Y) 7 (L/Y) Yes

TROUBLE DIAGNOSIS
BRC-103
[ESP/TCS/ABS]
C
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MA
B
BRC

Inspection 10 Stop Lamp Switch and CircuitEFS001AL
Inspection procedure
1. SELF-DIAGNOSIS RESULT CHECK
Check the self-diagnosis results.
Is
“STOP LAMP SW” indicated in the self-diagnosis results?
YES >> GO TO 2.
NO >> INSPECTION END.
2. STOP LAMP INSPECTION
1. Disconnect connectors for stop lamp switch and ESP/TCS/ABS control unit.
2. Securely connect them again.
3. Start the engine.
4. Repeat depressing 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 stop lamp switch and ESP/TCS/
ABS control unit.
2. Check for the continuity between the stop lamp switch and ESP/
TCS/ABS control unit.
Is inspection result OK?
YES >> Perform ESP/TCS/ABS control unit self-diagnosis again.
NO >> The harness disconnection between ESP/TCS/ABS control unit and 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 VOLTAGE [ABNORMAL]” indicated in the self-diagnosis results?
YES >> GO TO 2.
NO >> INSPECTION END.
Self-diagnosis results
STOP LAMP SW
SFIA2185E
ESP/TCS/ABS control unit
(harness connector E122)STOP LAMP SW
(harness connector M12)Continuity
48 (P) 2 (P) Yes
Self-diagnosis results
BATTERY VOLTAGE [ABNORMAL]

BRC-104
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

2. SELF-DIAGNOSIS RESULT CHECK 2
1. Disconnect 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 ESP/TCS/ABS control unit connector.
2. Turn ignition switch ON (engine not running), and check the volt-
age between ESP/TCS/ABS control unit 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 ESP/TCS/ABS control unit ground circuit.
Is inspection result OK?
YES >> Perform the ESP/TCS/ABS control unit self-diagnosis again.
NO >> Harness disconnection or improper installation of the ESP/TCS/ABS control unit.
SFIA2186E
ESP/TCS/ABS control unit
(harness connector E122)Body ground Voltage value
1 (G/R) – Battery voltage (approx. 12V)
SFIA2187E
ESP/TCS/ABS control unit
(harness connector E122)Body ground Continuity
28 (B) – Yes
29 (B) – Yes

TROUBLE DIAGNOSIS
BRC-105
[ESP/TCS/ABS]
C
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MA
B
BRC

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
ESP/TCS/ABS control unit.
Is inspection result OK?
YES >> Check battery for a loose terminal and low voltage or 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?
YES >> Replace ESP/TCS/ABS control unit, and perform the self-diagnosis again.
NO >> INSPECTION END.
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 angle sensor neutral position adjustment. GO TO 2.
SFIA2188E
ESP/TCS/ABS control unit
(harness connector E122)Battery terminal Continuity
1 (G/R) positive Yes
Self-diagnosis results
EMERGENCY BRAKE
Self-diagnosis results
ST ANGLE SEN SIGNAL

BRC-106
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS

2. SELF-DIAGNOSIS RESULT CHECK 2
Turn ignition switch OFF, and ON to erase the self-diagnosis results. And perform the ESP/TCS/ABS control
unit self-diagnosis again.
Is the same self-diagnosis item indicated again?
YES >> After replacing spiral cable (with the steering angle sensor), perform the neutral position adjust-
ment. 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 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 brake fluid level warning switch and
ESP/TCS/ABS control unit.
2. Check for the continuity between the brake fluid level warning switch and the ESP/TCS/ABS control unit.
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
BR FLUID LEVER LOW
SFIA2196E
ESP/TCS/ABS control unit
(harness connector E122)Brake fluid level warning switch
(harness connector E19)Continuity
40 (Y/B) 1 (Y/B) Yes