2001 NISSAN X-TRAIL Service Repair Manual

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Page 2817 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual TROUBLE DIAGNOSIS
BRC-33
[4WD/ABS]
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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 2818 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual BRC-34
[4WD/ABS]
TROUBLE DIAGNOSIS
Control Unit Power Supply System
EFS001BM
INSPECTION PROCEDURE
Disconnect control unit connector. Check for continuity and voltage between each terminal of vehicle-s

Page 2819 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual TROUBLE DIAGNOSIS
BRC-35
[4WD/ABS]
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3.G -SENSOR CIRCUIT CONNECTOR INSPECTION
1. Disconnect connectors and remove G -sensor from vehicle.
2. Check the voltage under followin

Page 2820 of 3833

NISSAN X-TRAIL 2001 Service 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

Page 2821 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual TROUBLE DIAGNOSIS
BRC-37
[4WD/ABS]
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7.CHECK 4WD ACTUATOR RELAY GROUND CIRCUIT
1. Disconnect the 4WD actuator relay connector.
2. Check continuity between the 4WD actuato

TROUBLE DIAGNOSIS
BRC-37
[4WD/ABS]
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7.CHECK 4WD ACTUATOR RELAY GROUND CIRCUIT
1. Disconnect the 4WD actuator relay connector.
2. Check continuity between the 4WD actuator relay harness connector E10 terminal No.3 (B) and body
ground.
OK or NG
OK >> 1. Connect the connector and perform self-diagnosis again.
2. Follow self-diagnosis procedure and, at the end, be sure to drive the vehicle at 30 km/h (19
MPH) for at least 1 minute and check that the 4WD warning lamp does not turn ON.
NG >> Repair or replace harness.
4WD Mode Switch SystemEFS001CB
1.INPUT SIGNAL CHECK
Check using the data monitor function of the CONSULT-II. While monitoring the 4WD mode switch items,
press 2WD mode switch. Check the display changes from ## to 2WD. Check the display for AUTO and LOCK
just the same. (## indicates when mode SW is not pressed.)
OK or NG
OK >>●4WD/ABS control unit input/output signal inspection
●Recheck 4WD/ABS control unit connector terminals and connection.
NG >> GO TO 3.
2.INSPECTION OF 4WD MODE SWITCH POWER SUPPLY
●Disconnect 4WD mode switch connector.
●Turn ignition switch ON.
●Measure voltage between 4WD mode change and over switch harness connector M39 terminal No.2 (L),
No.1 (BR).
OK or NG
OK >> GO TO 4.
NG >> Harness malfunction or connector malfunction between ignition switch and 4WD mode switch
connector or connector malfunction.
3.HARNESS CONTINUITY INSPECTION
●Turn ignition switch OFF.
●Confirm the continuity between the following terminals.
–4WD/ABS control unit harness connector E122 terminal No. 26 (L) and 4WD mode switch harness con-
nector M39 terminal No. 2 (L)
–4WD control unit harness connector E122 terminal No. 27 (BR) and 4WD mode switch harness connector
M39 terminal No. 1 (BR)
OK or NG
OK >> GO TO 5.
NG >> Malfunctioning harness or connector.3 (B) - Body ground : Continuity should exist.
2 (L), 1 (BR) - Body ground : 4 V or more.
26 (L) - 2 (L) : Continuity should exist.
27 (BR) - 1 (BR) : Continuity should exist.

Page 2822 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual BRC-38
[4WD/ABS]
TROUBLE DIAGNOSIS
4. HARNESS CONTINUITY INSPECTION
Drive the vehicle for a while and the perform self-diagnosis.
OK or NG
OK >> End
NG >>
●4WD/ABS control unit input/output signal i

Page 2823 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual TROUBLE DIAGNOSIS
BRC-39
[4WD/ABS]
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4WD WARNING LAMP DOES NOT ILLUMINATE WITH IGNITION ON
1.INSPECTION OF BLOWN FUSE BETWEEN IGNITION SWITCH AND COMBINATION METER
Check blown

Page 2824 of 3833

NISSAN X-TRAIL 2001 Service Repair Manual BRC-40
[4WD/ABS]
TROUBLE DIAGNOSIS
2. CHECK USING THE DATA MONITOR FUNCTION OF THE CONSULT- II
●Perform inspection by the data monitor function of the CONSULT-II.
●Check that the operation is in A

BRC-40
[4WD/ABS]
TROUBLE DIAGNOSIS
2. CHECK USING THE DATA MONITOR FUNCTION OF THE CONSULT- II
●Perform inspection by the data monitor function of the CONSULT-II.
●Check that the operation is in AUTO mode.
●Measure voltage when the accelerator pedal is not depressed. (Accelerator pedal not depressed: Approx.
0.5V or lower)
●Measure the current supplied to the E-TS solenoid valve. (Accelerator pedal not depressed: Approx. 0A)
OK or NG
OK >> GO TO 3. (No self-diagnosis malfunction indicated.)
NG >>
●Not in AUTO mode. GO TO 3.
●Voltage when accelerator pedal is not depressed is higher than approximately 0.5V.
●4WD solenoid valve current when the accelerator pedal is not depressed is other than 0A.
●Countermeasure: Keep the vehicle idling for approximately 15 minutes before checking again.
(Voltage when accelerator pedal is not depressed will be automatically reset to zero during this
period.)
3. INSPECTION USING 4WD MODE CHANGE-OVER SWITCH
●On data monitor screen of the CONSULT-II, check 4WD mode switch.
●Check if the display changes from ## to 2WD mode when the 2WD switch is pressed.
●Check if the display changes from ## to AUTO mode when the AUTO switch is pressed.
●Check if the display changes from ## to LOCK mode when the LOCK switch is pressed.
OK or NG
OK >> No malfunction detected.
NG >>
●Not in AUTO mode. (In 2WD or LOCK mode)
Countermeasure: Slightly depress the accelerator pedal and check that the operation mode
changes to LOCK mode.
●Check circuit between 4WD mode switch harness connector M39 terminal No.1 (BR) and
4WD control unit harness connector E122 terminal No. 27 (BR).
(AUTO mode is not available because a malfunction is present in the 2WD mode harness.)
NOTICE:
Mechanism of 4WD mode change-over
●2WD mode: Operation changes to 2WD mode when 4WD/ABS control unit harness connector
E122 terminal No. 27 (BR) is shorted to ground.
●AUTO mode: Operation changes to AUTO mode when 4WD/ABS control unit harness connec-
tor E122 terminals No. 27 (BR) and No. 26 (L) is shorted to ground.
●LOCK mode: Operation changes to LOCK mode when 4WD/ABS control unit harness connec-
tor E122 terminal No. 26 (L) is shorted to ground.

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