2003 NISSAN X-TRAIL Electronic Repair Manual

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Page 897 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-29
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
´: Applicable
–: Not applicable
ACTIVE TEST
Operation procedure
CAUTION:
lDo not perform active test wheel running.
lBe sure completely

Page 898 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual BRC-30
[4WD/ABS]
TROUBLE DIAGNOSIS
NOTE:
lIf active test is performed with brake pedal depressed, pedal
stroke may be changed. This is a normal condition.
l“TEST STOP” is displayed 10 seconds late

Page 899 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-31
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
Continuity exists, resistance value
Insulation inspection
lCheck resistance value between each pair of ABS solenoid E70 and E71 terminals

Page 900 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual BRC-32
[4WD/ABS]
TROUBLE DIAGNOSIS
4WDSOLENOIDVALVE
lDisconnect connector and measure resistance between termi-
nals B152 No. 1 (L/W) and No. 2 (LG).
Basic InspectionEFS001BK
BASIC INSPECTION 1 BRAKE

BRC-32
[4WD/ABS]
TROUBLE DIAGNOSIS
4WDSOLENOIDVALVE
lDisconnect connector and measure resistance between termi-
nals B152 No. 1 (L/W) and No. 2 (LG).
Basic InspectionEFS001BK
BASIC INSPECTION 1 BRAKE FLUID LEVEL AND LEAKAGE INSPECTION
1. Check fluid level in brake reservoir tank. If fluid level is low, refill brake fluid.
2. Check area around brake piping and ABS actuator for leaks. If a leak or oozing is detected, check as fol-
lows:
lIf connections at ABS actuator are loose, tighten piping to the specified torque. Then check again for
leaks, and be sure there is no fluid leak.
lIf the flare nuts at the connections and the threads of the ABS actuator are damaged, replace the dam-
aged parts. Then check again for leaks, and make sure that there is no fluid leak.
lIf leak or oozing is detected except for ABS actuator connections, wipe it with clean cloth. Then check
again for leaks. If there is still leak or oozing, replace damaged part.
lIf leak or oozing is detected on ABS actuator, wipe with a clean cloth. Check again for leaks, and if
there is still leak or oozing, replace ABS actuator.
CAUTION:
ABS actuator body cannot be disassembled.
BASIC INSPECTION 2 INSPECTION FOR LOOSE POWER SUPPLY TERMINAL
Check battery for looseness on battery positive/negative terminals and ground connection.
BASIC INSPECTION 3 ABS/4WD WARNING LAMP INSPECTION
1. Be sure ABS warning lamp turns on when ignition switch is turned ON. If it does not turn on, check ABS
warning lamp harness.
2. Check 4WD warning lamp illuminates with ignition switch ON. If not so, check 4WD warning lamp path.
3. Be sure ABS warning lamp turns off after approximately 1 second when ignition switch is turned ON. If it
does not turn off, perform self-diagnosis.
4. Be sure 4WD warning lamp turns off after several seconds when engine is started. If it does not turn off,
perform self-diagnosis.
5. After driving the vehicle at Approx. 30km/h for a few seconds, check 4WD warning lamp and ABS warning
lamp do not illuminate.
6. After completing the self-diagnosis, always erase the diagnosis memory.
Wheel Speed Sensor SystemEFS001BL
INSPECTION PROCEDURE
1.TIRE INSPECTION
Check air pressure, wear, and size.
Are air pressure, wear, and size within specifications?
YES >> GO TO 2.
NO >> Adjust air pressure, or replace tire.4WD solenoid valve 1 - 2 : Approx. 2.45W
SDIA0136E

Page 901 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-33
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
2.SENSOR ROTOR INSPECTION
Check sensor rotor tooth for damage.
Is inspection result OK?
YES >> GO TO 3.
NO >> Replace sensor rotor.
3.CHEC

Page 902 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual BRC-34
[4WD/ABS]
TROUBLE DIAGNOSIS
Control Module Power Supply System
EFS001BM
INSPECTION PROCEDURE
Disconnect ABS actuator connector and control unit connector. Check for continuity and voltage betwe

Page 903 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual TROUBLE DIAGNOSIS
BRC-35
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
3.G -SENSOR CIRCUIT CONNECTOR INSPECTION
1. Disconnect connectors and remove G -sensor from vehicle.
2. Check the voltage under following

Page 904 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual BRC-36
[4WD/ABS]
TROUBLE DIAGNOSIS
2.CONNECTOR INSPECTION
1. Disconnect the 4WD/ABS control unit connector E122 and the 4WD solenoid connector B152. Check that
terminals are not deformed. Check that t

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