NISSAN X-TRAIL 2001 Service Repair Manual

TROUBLE DIAGNOSIS
BRC-27
[4WD/ABS]
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7. Return to monitor item selection screen. Touch any of “ECU INPUT SIGNALS”, “MAIN SIGNALS”,
“CAN DIG SUPPORT MINTR” or “SELECTION FROM MENU”.
Refer to following “Data monitor item chart”.
8. Touch “MONITOR START”.
9. Screen of data monitor is displayed.
Display Item List
Item (Unit)Monitor item selection
Remarks
Control module input
itemMain item Item menu selection
FR RH SENSOR (km/
h)×××Wheel speed calcu-
lated by front RH wheel
sensor signal is dis-
played.
FR LH SENSOR (km/h)×××Wheel speed calcu-
lated by front LH wheel
sensor signal is dis-
played.
RR RH SENSOR (km/
h)×××Wheel speed calcu-
lated by rear RH wheel
sensor signal is dis-
played.
RR LH SENSOR (km/
h)×××Wheel speed calcu-
lated by rear LH wheel
sensor signal is dis-
played.
DECEL G-SENSOR×××Condition of G -sensor
is displayed.
THRTL POS SEN×××Indicates throttle posi-
tion sensor signal volt-
age
STOP LAMP SW×××Operating condition of
ABS warning lamp by
control unit is dis-
played.
ENGINE SPEED SIG
(STOP/RUN)×××Condition of stop lamp
switch (ON/OFF) is dis-
played.
FR RH IN SOL –××Operating condition
(ON/OFF) of rear RH
ABS inlet solenoid
valve is displayed.
FR RH OUT SOL –××Operating condition
(ON/OFF) of rear RH
ABS outlet solenoid
valve is displayed.
FR LH IN SOL –××Operating condition
(ON/OFF) of rear RH
ABS inlet solenoid
valve is displayed.
FR LH OUT SOL (ON/
OFF)–××Operating condition
(ON/OFF) of rear RH
ABS outlet solenoid
valve is displayed.
RR RH IN SOL (ON/
OFF)–××Operating condition
(ON/OFF) of rear RH
ABS inlet solenoid
valve is displayed.

BRC-28
[4WD/ABS]
TROUBLE DIAGNOSIS
×: Applicable
–: Not applicableRR RH OUT SOL (ON/
OFF)–××Operating condition
(ON/OFF) of rear RH
ABS outlet solenoid
valve is displayed.
RR LH IN SOL (ON/
OFF)–××Operating condition
(ON/OFF) of rear RH
ABS inlet solenoid
valve is displayed.
RR LH OUT SOL (ON/
OFF)–××Operating condition
(ON/OFF) of rear RH
ABS outlet solenoid
valve is displayed.
E-TS SOLENOID (A) –××Current supplied to E-
TS solenoid valve
ACTUATOR RLY (ON/
OFF)–××Condition of ABS actu-
ator relay (ON/OFF) is
displayed.
MOTER RLY (ON/OFF) –××Condition of ABS motor
relay (ON/OFF) is dis-
played.
E-TS ACTUATOR –××E-TS actuator relay
ON/OFF condition
WARNING LAMP (ON/
OFF)–××Indicates ABS warning
lamp operating condi-
tion
G-SEN VOLT (V)×–×Condition of G -sensor
(ON/OFF) is displayed.
BATTERY VOLT×–×Indicates voltage sup-
plied by 4WD/ABS con-
trol unit
4WD WARNING LAMP –××Indicates 4WD warn-
ing lamp operating con-
dition
4WD MODE SW –××4WD mode recognized
by control module
4WD MODE MON –××Output condition of
drive mode indicator
lamp signal
DIS TIRE MONI (mm) –××Improper size tire
installed condition
PARK BRAKE SW
(ON/OFF)–××Indicates parking brake
switch ON/OFF condi-
tion
SPEED MTR O/P (km/
h)–××Indicates vehicle speed
recognized by meter
control unit
VOLTAGE – –×Displays values mea-
sured by voltage probe
FREQUENCY – –
×Refer to CONSULT
operation manual. Item (Unit)Monitor item selection
Remarks
Control module input
itemMain item Item menu selection

TROUBLE DIAGNOSIS
BRC-29
[4WD/ABS]
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ACTIVE TEST
Operation Procedure
CAUTION:
●Do not perform active test wheel running.
●Be sure completely bleed air from brake system.
● Active test cannot be performed with ABS warning lamp on.
1. Connect CONSULT-II to data link connector and start engine.
2. Touch “START” on the display.
3. Touch “ABS”.
4. Touch “ACTIVE TEST”.
5. Test item selection screen is displayed.
6. Touch test item.
7. Touch “START” with “MAIN SIGNALS” line inverted.
8. Active test screen is displayed.
Display Item List
ABS solenoid valve
Touch “UP”, “KEEP” and “DOWN”. Check ABS solenoid valves (inlet/
outlet) operate as the following chart using screen monitor.
*: ON for 1 to 2 seconds after touch, and then OFF
NOTE:
●If active test is performed with brake pedal depressed, pedal
stroke may be changed. This is a normal condition.
●“TEST STOP” is displayed 10 seconds later from the operation
start.
●To perform test again after “TEST STOP” is displayed, repeat
step 6 of operation procedure.
SFIA0394E
Operation Up Keep Down
ABS inlet S/V OFF ON ON
ABS outlet S/V OFF OFF ON*
SFIA0395E
SFIA0396E

BRC-30
[4WD/ABS]
TROUBLE DIAGNOSIS
ABS motor
Touch “ON” and “OFF” on screen. Check ABS motor relay operates
as shown in the following chart.
NOTE:
●If active test is performed with brake pedal depressed, pedal
stroke may be changed. This is a normal condition.
●“TEST STOP” is displayed 10 seconds later from the operation
start.
Active test
4WD solenoid valve
Under the vehicle stopped with engine running, touch UP, DOWN on
screen. Adjust 4WD solenoid command current.
Check the monitor current at that time. If monitor current is within
Approx. ±10%, light switch is normal.
CAUTION:
Do not continuously energize solenoid for long period of time.
Component InspectionEFS001BJ
ABS ACTUATOR
●Disconnect each ABS actuator E69, E70, E71 connector. Con-
firm continuity and resistance value between each pair of ABS
actuator-side terminal.
CAUTION:
Be sure ABS motor is securely grounded.
Operation ON OFF
ABS actuator ON ON
ABS motor ON OFF
SFIA0397E
SDIA0626E
SFIA1099E

TROUBLE DIAGNOSIS
BRC-31
[4WD/ABS]
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Continuity Exists, Resistance Value
Insulation Inspection
●Check resistance value between each pair of ABS solenoid connector E71 terminal No.6 and E70 and
E71 terminals No.1, 2, 3,12, 25, 26, 27, 28.
ABS Motor Operation Inspection
1. Connect 2-pin connector on ABS actuator harness connector
E69 terminals No. 9 (R/B) and No. 10 (Y).
2. Apply voltage of Approx. 12V voltage between connector E70
terminal No. 5 and E70 terminal No. 8 on ABS relay unit. Mea-
sure motor voltage (E70 terminal No. 4 - Body ground) using an
oscilloscope and check motor counter electromotive force dura-
tion when operation stops.
CAUTION:
●Before measuring time, check each part of ABS relay unit
and confirm motor relay is normal.
●To prevent overheating, ABS motor should be driven no
longer than 4 seconds.
●Motor counter electromotive force duration is based on the
time at 20°C, in ambient temperatures, with 12V battery volt-
age. If battery voltage is low, time will be slightly shorter.
SFIA0930E
Standard : 5.8 - 21.2 Ω
Motor counter electromotive force duration:
0.1 second or longer
SFIA0931E

BRC-32
[4WD/ABS]
TROUBLE DIAGNOSIS
4WD SOLENOID VALVE
●Disconnect connector B152 and measure resistance between
terminals No. 1 and No. 2.
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:
● If 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.
● If 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.
●If 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.
●If 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 (19MPH) 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 Sensor SystemEFS001BL
INSPECTION PROCEDURE
1. TIRE INSPECTION
Check tire 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. 2.45 Ω
SDIA0136E

TROUBLE DIAGNOSIS
BRC-33
[4WD/ABS]
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BRC
2.SENSOR ROTOR INSPECTION
Check sensor rotor tooth for damage.
Is inspection result OK?
YES >> GO TO 3.
NO >> Replace sensor rotor.
3.CHECK THE CONNECTOR
1. Remove both the malfunctioning wheel sensor (identified at con-
trol unit) and the 4WD/ABS control unit connector. Check the defor-
mation of the terminal or if the connection is at the incomplete state.
Then connect the connectors.
2.Operate self-diagnosis.
Does ABS warning lamp illuminate?
YES >> GO TO 4
NO >> Check is completed.
4.CHECK WHEEL SENSOR.
Check internal resistance of wheel sensor.
Is inspection result OK?
YES >> GO TO 5.
NO >> Replace wheel speed sensor.
5.CHECK WHEEL SENSOR CIRCUIT.
1. Disconnect control unit connector and wheel sensor connector.
2. Check continuity between the 4WD/ABS control unit harness
connector E122 terminal N0.43 (G/W), 34 (L/W), 37 (W), 46 (B),
35 (L), 44 (B/W), 45 (W/R), 36 (OR/B) and wheel sensor har-
ness connector E59 No.1 (G/W), 2 (L/W), E17 No.1 (W), 2 (B),
B126 No.1 (L), 2 (B/W), B130 No.1 (W/R), 2(OR/B)
Is inspection result OK?
YES >> Replace 4WD/ABS control unit.
NO >> Repair or replace the harness.
SFIA0932E
Resistance : 1.44 - 1.76 kΩ
SFIA0357E
SFIA0470E

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-side con-
nector and body ground.
G -Sensor System (4WD models)EFS001BN
INSPECTION PROCEDURE
1. CONNECTOR INSPECTOR INSPECTION
1. Disconnect control unit connector and G sensor connector. Check control module connector terminal for
deformation and poor connection. Reconnect connector.
2. Perform the self-diagnosis.
Dose warning lamp illuminate?
YES >> GO TO 2.
NO >> Diagnosis completed
2. G -SENSOR OR HARNESS INSPECTION
1. Disconnect G -sensor connector.
2. Disconnect control unit connector.
3. Check harness between control unit and G sensor.
Is inspection result OK?
YES >> GO TO 3.
NO >> Repair or replace the harness.
Terminal No. Signal name Measuring condition Measurement value
3 (G/R), 109 (G/R) Power supply Ignition switch ON Battery voltage
104 (B), 106 (B), 108 (B), 11 (B),
113 (B), 115 (B)Ground Ignition switch OFF There should be continuity.
SFIA0469E
SFIA0468E

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 following condition with ignition switch
ON: G sensor harness-side connector terminal M57 No.1 (W) -
Body ground
Is inspection result OK?
YES >> GO TO 4.
NO >> Replace 4WD/ABS control unit.
4.G -SENSOR UNIT INSPECTION
1. Using a test harness, connect 8.0V from the G -sensor harness
connector terminal M57 No.1 (W) to the G -sensor connector
terminal M57 No.1.
2. Using a test harness, connect a ground from the G -sensor har-
ness connector terminal M57 No.3 (B) to the G -sensor connec-
tor terminal M57 No. 3.
3. With ignition switch ON, when the G sensor is in horizontal,
check the output voltage under following condition with tilted for-
ward and backward by 90° and 0°: terminal M57 No.2 - terminal
M57 No.3.
4. After inspection, install the G sensor. Erase diagnosis trouble code of the 4WD/ABS control unit.
Is inspection result OK?
YES >> GO TO 5.
NO >> Replace G -sensor.
5.WARNING LAMP DISPLAY CODE INSPECTION
1. Connect the connector and perform self-diagnosis again.
2. Follow self-diagnosis procedure. After diagnosis, be sure to drive the vehicle at 30 km/m (19 MPH) for 1
minute or longer and be sure that the ABS warning lamp does not come on.
>> Diagnosis completed
4WD Solenoid, Actuator Relay SystemEFS001CA
Checking procedure
1.INSPECTION START
Use CONSULT-II and perform self-diagnosis.
OK or NG
OK >> Drive at 30 km/h (19 MPH) for at least 1 minute. Check that 4WD warning lamp does not turn ON.
NG >> GO TO 2.No.1 - Body ground : Approx. 8.0 V
SDIA0631E
No. 2 to No. 3 output voltage (V)
Horizontal : 2.3 - 2.7
Tilted forward by 90°: 0.80 - 0.86
Tilted rearward by 90°: 3.87 - 4.47SDIA0632E

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 the connectors were connected properly. Reconnect connectors.
2. Perform self-diagnosis again.
OK or NG
OK >> Diagnosis completed.
NG >> GO TO 3.
3. INSPECTION OF 4WD SOLENOID UNIT
1. Disconnect connector B152 and check resistance between terminals No.1 and 2.
OK or NG
OK >> GO TO 4.
NG >> Replace 4WD solenoid.
4. INSPECTION OF 4WD SOLENOID CIRCUIT HARNESS
1. Disconnect the 4WD solenoid connector.
2. Disconnect the 4WD/ABS control unit.
3. Check the circuit continuity between control unit harness connector E122 terminal No.102 (LG) and 4WD
solenoid harness connector B152 terminal No.2 (LG).
4. Disconnect the 4WD actuator relay connector.
5. Check circuit continuity between 4WD solenoid harness connector B152 terminal No.1 (L/W) and 4WD
actuator relay connector E10 terminal No.5 (L/W)
OK or NG
OK >> GO TO 5.
NG >> Repair or replace the harness.
5. CHECK 4WD ACTUATOR RELAY AND CONNECTOR
1. Check the 4WD actuator relay and control unit harness connector.
2. Check the 4WD actuator relay unit.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace 4WD actuator relay and connector.
6. CHECK 4WD ACTUATOR RELAY POWER CIRCUIT
1. Disconnect the 4WD/ABS control unit connector.
2. Turn the ignition switch ON and check voltage between the 4WD control unit harness connector E122 ter-
minal No.18 (BR/W) and body ground.
OK or NG
OK >> GO TO 7.
NG >>
●Check items below. Perform self-diagnosis again.
–Check fuse 10 A (#8).
–Check harness and connectors between the fuse 10 A (#8), the 4WD actuator relay and the
4WD control unit. 1 - 2 : Approx. 2.45 Ω
102 (LG) - 2 (LG) : Continuity should exist.
1 (L/W) - 5 (L/W) : Continuity should exist.
18 (BR/W) - Body ground : Battery voltage