2001 NISSAN X-TRAIL ignition

TROUBLE DIAGNOSIS
BRC-47
[4WD/ABS]
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Inspection Of Drive Mode Change-over Switch PathEFS001C0
1.INSPECTION OF DRIVE MODE CHANGE-OVER SWITCH
Inspection of drive mode change-over switch
Is inspection result OK?
YES >> GO TO 2.
NO >> Poor drive mode change-over switch
2.INPUT SIGNAL CHECK
Select control module input item on monitoring item selection. While monitoring drive mode change-over
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.)
Is inspection result OK?
YES >>●4WD/ABS control unit input/output signal inspection
●Recheck 4WD/ABS control unit connector terminals and connection.
NO >> GO TO 3.
3.INSPECTION OF DRIVE MODE CHANGE-OVER SWITCH POWER SUPPLY
●Disconnect drive mode change-over switch connector.
●Turn ignition switch ON.
●Measure voltage between drive mode change-over switch connector and body ground. Check the voltage
is 4V or more.
Is inspection result OK?
YES >> GO TO 4.
NO >> Harness malfunction or connector malfunction between ignition switch and drive mode change-
over switch connector or connector malfunction.
4.HARNESS CONTINUITY INSPECTION
●Turn OFF ignition switch.
●Confirm continuity between following terminals.
(4WD/ABS control unit connector E122 terminal No.26 (L) - Drive mode switch connector M39 terminal
No.2 (L)) (4WD/ABS control unit connector E122 terminal No. 27 (BR) - Drive mode switch connector M39
terminal No.1 (BR)).
Is inspection result OK?
YES >> GO TO 5.
NO >> Malfunctioning harness or connector.
5.HARNESS CONTINUITY INSPECTION
Drive the vehicle for a while and the perform self-diagnosis.
Is inspection result OK?
YES >> End
NO >>
●4WD/ABS control unit input/output signal inspection
●Recheck 4WD/ABS control unit connector terminals and connection.

BRC-54
[ESP/TCS/ABS]
PRECAUTIONS
[ESP/TCS/ABS]PRECAUTIONSPFP:00001
Precautions for Brake SystemEFS0019O
●Recommended fluid is brake fluid “DOT 3” or “DOT 4”.
●Never reuse drained brake fluid.
●Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is splashed
on painted areas, wash it away with water immediately.
●Never use mineral oils such as gasoline or kerosene. They will ruin rubber parts of hydraulic system.
●Use flare nut wrench when removing and installing brake tubes.
●Always torque brake lines when installing.
●Before working, turn the ignition switch OFF and disconnect the
connectors for the ESP/TCS/ABS actuator and control unit or
the battery terminals.
●Burnish the brake contact surfaces after refinishing or replacing
drums or rotors, after replacing pads or linings, or if a soft pedal
occurs at very low mileage. Refer to BR-10, "
Brake Burnishing
Procedure" .
WARNING:
Clean brakes with a vacuum dust collector to minimize risk
of health hazard from powder caused by friction.
Precautions for Brake ControlEFS0019P
●During the ESP/TCS/ABS operation, the brake pedal vibrates lightly and its mechanical noise may be
heard. This is a normal condition.
●Just after starting the vehicle after ignition switch ON, the brake pedal may vibrate or the motor operating
noise may be heard from the engine compartment. This is a normal status of the operation check.
●The stopping distance may be longer than that of vehicles without ABS when the vehicle drives on rough,
gravel, or snowy (fresh deep snow) road.
●If a malfunction is indicated by the ABS warning lamp, or other warning lamps, collect the necessary infor-
mation from the customer (what symptoms are present under what conditions) and find out the possible
causes before starting the service. Besides the electrical system inspection, check the booster operation,
brake fluid level, and oil leaks.
●If the tire size and type are used in a improper combination, or the brake pads are not NISSAN genuine
parts, the stopping distance or steering stability may deteriorate.
●If there is a radio, antenna, or antenna lead-in wire (including wiring) near the control unit, the ESP/TCS/
ABS function may have a malfunction or error.
●If aftermarket parts (e.g. Car stereo equipment, CD player) have been installed, check the electrical har-
nesses for pinches, open, and improper wiring.
Precautions for CAN SystemEFS001CP
FOR INSPECTION
●Do not apply voltage of 7.0V or higher to the measurement terminals.
●Use the tester with its open terminal voltage being 7.0V or less.
●Before harness inspection, turn the ignition switch off, disconnect the negative battery terminal.
SBR820BA

ON-VEHICLE SERVICE
BRC-57
[ESP/TCS/ABS]
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ON-VEHICLE SERVICEPFP:00000
Adjustment of Neutral Position of Steering Wheel Angle SensorEFS0019R
●After removing/installing or replacing the ESP/TCS/ABS control unit, steering wheel angle sensor, steer-
ing components, suspension components, and tires, or after adjusting the wheel alignment, make sure to
adjust the neutral position of the steering wheel angle sensor before running the vehicle.
CAUTION:
To adjust the neutral position of the steering wheel angle sensor, make sure to use CONSULT-II.
(Adjustment cannot be done other than CONSULT-II.)
1. Stop the vehicle with the front wheels in the straight-ahead position.
2. Connect CONSULT-II to data link connector on the vehicle, and
turn the ignition switch to ON position (engine not running).
3. Touch “START”, “ABS”, “WORK SUPPORT” and “ST ANGLE
SENSOR ADJUSTMENT” on the CONSULT-II screen in this
order.
PBIB0196E
SFIA0364E
SFIA0365E
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BRC-58
[ESP/TCS/ABS]
ON-VEHICLE SERVICE
4. Touch “START”.
CAUTION:
Do not touch the steering wheel while adjusting the steer-
ing wheel angle sensor.
5. After approximately 10 seconds, touch “END”. (After approxi-
mately 60 seconds, it ends automatically.)
6. Turn the ignition switch OFF, then turn it ON again.
CAUTION:
Make sure to carry out the above operation.
7. Run the vehicle with the front wheels in the straight-ahead posi-
tion, then stop.
8. Select “DATA MONITOR“, “ECU INPUT SIGNALS” on the CON-
SULT-II screen. Then check that the “ST ANGLE SIG” is within
0±2.5deg. If the value is more than the specification, repeat
steps 1 to 5.
9. Erase the memory of ESP/TCS/ABS control unit and ECM.
10. Turn the ignition switch OFF.
SFIA0371E
SFIA0365E

GENERAL INFORMATION
BRC-59
[ESP/TCS/ABS]
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GENERAL INFORMATIONPFP:00000
Fail-SafeEFS0019S
ABS SYSTEM
If a malfunction occurs in the electrical system, the ABS warning lamp, ESP OFF indicator lamp, and SLIP
indicator lamp in the meter will turn ON. In this condition, the ESP/TCS/ABS and EBD become one of the fol-
lowing conditions by the fail-safe function.
1. Only EBD operates. The same condition as that of models without ESP/TCS/ABS
2. ESP/TCS/ABS and EBD do not operate. Only normal brake operates on 4 wheels.
NOTE:
In the step 1 shown above, the self-diagnosis is carried out at the ignition switch is turned ON and when the
vehicle initial starts. ABS self-diagnosis noise may be heard as usual.
ESP/TCS SYSTEM
If a malfunction occurs in the electrical system, the ESP OFF indicator lamp and SLIP indicator lamp in the
meter turn on. In this condition, ESP/TCS will be deactivated and it becomes equal to that of models without
ESP/TCS. However, ABS is controlled normally.
If a malfunction occurs in the throttle control system, ESP/TCS control does not operate. Only ABS control
operates normally.
CAUTION:
If the fail-safe function operates, carry out the self-diagnosis for ESP/TCS/ABS control system.
Hydraulic Circuit EFS0019T
CAUTION:
●When installing, check for twist and fracture.
●Make sure that there is no interference with other parts when turning the steering clockwise or
counter clockwise.
●The brake piping is an important safety part. If a brake fluid leak is detected, always disassemble
and replace with a new one, if necessary.
ABS FunctionsEFS0019U
1. In cases of braking suddenly or braking on slippery road (ice road), ABS functions prevent wheels from
lock, improve the stability in sudden braking, and make efficient avoidance of obstacles with steering
manipulation by detecting 4-wheel speed and controlling 4-wheel brake fluid pressure.
2. EBD is integrated in ESP/TCS/ABS system.
CAUTION:
●During ABS operation, the brake pedal lightly vibrates and its mechanical noise may be heard.
This is a normal condition.
SFIA0346E

TROUBLE DIAGNOSIS
BRC-75
[ESP/TCS/ABS]
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Control Unit Input/Output Signal StandardEFS001A6
STANDARDS USING A CIRCUIT TESTER AND OSCILLOSCOPE
CAUTION:
Connect the connectors for the ESP/TCS/ABS control unit and actuator, and turn the ignition switch
ON.
SFIA0896E
Measure-
ment termi-
nalMeasuring point Standard value (Note 1)(Reference) Check
items for malfunc-
tion
+–
1
Body
groundPower supply Ignition switch ON Battery voltage (Approx. 12V)
Control unit power
supply circuit
2Actuator motor relay,
actuator relay power
supply and steering
wheel angle sensor
power supplyIgnition switch ON Battery voltage (Approx. 12V)
7 Actuator motor relayActuator motor being driven
(“Active test ”mode with CON-
SULT-II)Approx. 0V
Actuator motor,
motor relay, and
circuit
Actuator motor while the vehicle
is stoppedBattery voltage (Approx. 12V)
36 Actuator relayWhen actuator relay is active.
(the engine running)Approx. 0V
Actuator relay and
circuit
When actuator relay is inactive.
(Fail-safe, engine starts.)Battery voltage (Approx. 12V)
20 Actuator motor monitorWhen actuator relay is active.
(the engine running)Battery voltage (Approx. 12V)
Actuator motor
monitor circuit
When actuator relay is inactive.
(Fail-safe, engine starts.)Approx. 0V
3
Body
groundFront LH wheel outlet
solenoid valve
Solenoid valve activated
(In “active test” mode of CON-
SULT-II) or actuator relay inac-
tive (in fail-safe mode)
When solenoid valve is inactive
and actuator relay active (when
ignition switch ON)Approx. 0V
Battery voltage (Approx. 12V)Solenoid valve and
circuit 4Rear RH wheel outlet
solenoid valve
5Front LH wheel inlet
solenoid valve
6Rear RH wheel inlet
solenoid valve
25Rear LH wheel outlet
solenoid valve
26Front RH wheel inlet
solenoid valve
53Rear LH wheel inlet sole-
noid valve
55Front RH wheel outlet
solenoid valve

BRC-76
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
49
Body
groundPrimary-side ESP
switch-over solenoid
valve 1 (USV)When switch-over solenoid
valve is active (in “active test”
mode of CONSULT-II)
Or, when actuator relay inactive
(when fail-safe)
When switch-over solenoid
valve is inactive and actuator
relay is active (when ignition
switch ON)Approx. 0V
Battery voltage (Approx. 12V)Switch-over sole-
noid valve and cir-
cuit 50Secondary-side ESP
switch-over solenoid
valve 1 (USV)
52Secondary-side ESP
switch-over solenoid
valve 2 (HSV)
54Primary-side ESP
switch-over solenoid
valve 2 (HSV)
8 10 Front LH wheel sensor
Wheel rotated [Approx. 30 km/h
(19 MPH)] (Note 2)Pulse generation
: Approx. 200 HzWheel speed sen-
sor and circuit 11 12 Rear RH wheel sensor
13 14 Rear LH wheel sensor
15 16 Front RH wheel sensor
48Body
groundStop lamp signalDepress brake pedal. Battery voltage (Approx. 12V)
Stop lamp switch
and circuit
Release the brake pedal. Approx. 0V
44
Body
groundESP OFF switchESP OFF switch is pressed. Approx. 10V
ESP OFF switch
and circuit
ESP OFF switch is released. Approx. 12V
61CAN communication
input/output signal (H)Ignition switch ON
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63CAN communication
input/output signal (L)Ignition switch ON Measure-
ment termi-
nalMeasuring point Standard value (Note 1)(Reference) Check
items for malfunc-
tion
+–
PBIA0224J
PBIA0223J

TROUBLE DIAGNOSIS
BRC-77
[ESP/TCS/ABS]
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(Note 1): When the standard value is checked using a circuit tester for voltage measurement, the connector terminals should not extend
forcefully.
(Note 2): Check the pressure of the tire in normal condition.
(Note 3): ON/OFF timing of the ABS warning lamp
ON: For approximately 0.5 seconds after the ignition switch is turned ON, or when a malfunction is detected.
OFF: Approximately 0.5 seconds after the ignition switch is turned ON (when the system is in normal operation).
(Note 4): ON/OFF timing of the ESP OFF indicator lamp
ON: For approximately 0.5 seconds after the ignition switch is turned ON, or when a malfunction is detected ESP OFF switch is ON. 67
Body
groundPressure sensorIgnition switch ON Approx. 0V
Pressure sensor
and circuit 68When ignition switch ON and
brake pedal released.Approx. 0.6V
69 Ignition switch ON Approx. 0V
18 Side G sensor Ignition switch ON Approx. 2.5VYaw rate and Side
G sensor and cir-
cuit
34
Yaw rate and Side G
sensorIgnition switch ON Battery voltage (Approx. 12V)
Yaw rate and Side
G sensor and cir-
cuit 77 Ignition switch ON
78 Ignition switch ON Approx. 2.5V
79
Yaw rate sensorIgnition switch ON
Ya w r a t e s e n s o r
and circuit
80 Ignition switch ON Approx. 0V
30 ABS warning lampABS warning lamp turns on
(Note 3)Approx. 0V
ABS warning lamp
and circuit
ABS warning lamp turns off
(note 3)Battery voltage (Approx. 12V)
70 ESP OFF indicator lampESP OFF indicator lamp turns
on (Note 4)Approx. 0V
ESP OFF warning
lamp and circuit
ESP OFF indicator lamp turns
off (note 4)Battery voltage (Approx. 12V)
83 SLIP indicator lampWhen SLIP indicator lamp is ON
(Note 5)Approx. 0V
SLIP indicator
lamp and circuit
SLIP indicator lamp turns off
(note 5)Battery voltage (Approx. 12V)
40 Brake fluid level warning
switchBrake fluid is not enough Battery voltage (Approx. 12V) Brake fluid level
warning switch and
circuit
Brake fluid is enough Approx. 0V
76Body
groundParking brake signalApply the parking brake. Battery voltage (Approx. 12V)
Parking brake
switch and circuit
Release the parking brake. Approx. 0V Measure-
ment termi-
nalMeasuring point Standard value (Note 1)(Reference) Check
items for malfunc-
tion
+–
SFIA0150E
SFIA0151E