2005 NISSAN X-TRAIL ESP

BRC-50
[ESP/TCS/ABS]
PRECAUTIONS

[ESP/TCS/ABS]PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EFS004H7
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Brake SystemEFS0019O

Recommended fluid is brake fluid “DOT 3” or “DOT 4”.

Do not 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.

Do not use mineral oils such as gasoline or kerosene. They will ruin rubber parts of hydraulic system.

Using a flare nut torque wrench, securely tighten brake tube
flare nuts.

When installing brake piping, be sure to check torque.

Before working, turn the ignition switch OFF and disconnect the
connectors for the ESP/TCS/ABS control unit and control unit or
the battery negative terminal.

Burnish the brake pad 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-31, "
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 tyre 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.

If aftermarket parts (car stereo, CD player, etc.) have been installed, check harnesses for pinches, open,
and improper wiring.
SBR820BA

PREPARATION
BRC-51
[ESP/TCS/ABS]
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PREPARATIONPFP:00002
Special Service ToolsEFS00219
Tool number
Tool nameDescription
GG94310000
Flare nut torque wrench
a:10mm (0.39 in) / 12mm (0.47 in)Installing each brake piping
NT406

BRC-52
[ESP/TCS/ABS]
ON-VEHICLE SERVICE

ON-VEHICLE SERVICEPFP:00000
Adjustment of Steering Angle Sensor Neutral PositionEFS0019R
In case of doing work that applies to the list below, make sure to adjust neutral position of steering angle sen-
sor before running vehicle.
×: Required
–: Not required
CAUTION:
To adjust neutral position of steering angle sensor, make sure to use CONSULT-II.
(Adjustment cannot be done without CONSULT-II.)
1. Stop vehicle with front wheels in straight-ahead position.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector on vehicle, and turn ignition
switch ON (do not start engine).
CAUTION:
If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
3. Touch “ABS”, “WORK SUPPORT” and “ST ANGLE SENSOR ADJUSTMENT” on CONSULT-II screen in
this order. Refer to BRC-79, "
CONSULT-II BASIC OPERATION PROCEDURE" .
4. Touch “START”.
CAUTION:
Do not touch steering wheel while adjusting steering angle
sensor.
5. After approximately 10 seconds, touch “END”. (After approxi-
mately 60 seconds, it ends automatically.)
6. Turn ignition switch OFF, then turn it ON again.
CAUTION:
Be sure to carry out above operation.
7. Run vehicle with front wheels in straight-ahead position, then
stop.
8. Select “DATA MONITOR”, “SELECTION FROM MENU”, and “STR ANGLE SIG” on CONSULT-II screen.
Then make sure “STR ANGLE SIG” is within 0 ±3.5 deg. If value is more than specification, repeat steps 1
to 7.
9. Erase memory of ESP/TCS/ABS control unit and ECM.
10. Turn ignition switch OFF.
Situation Adjustment of Steering Angle Sensor Neutral Position
Removing/Installing ESP/TCS/ABS control unit−
Replacing ESP/TCS/ABS control unit−
Removing/Installing steering angle sensor×
Removing/Installing steering components×
Removing/Installing suspension components×
Change tyre to new ones–
Tyre rotation–
Adjusting wheel alignment×
SFIA0371E

SYSTEM DESCRIPTION
BRC-53
[ESP/TCS/ABS]
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SYSTEM DESCRIPTIONPFP:00000
System DiagramEFS0019X
ESP FunctionEFS0019W
1. The Electronic Stability Program is called the ESP for short. ESP is indicated as ESP on CONSULT-II
screen.
2. In addition to the ABS/TCS function, ESP detects a driver's steering operation amount and brake opera-
tion amount from steering angle sensor and pressure sensor. Using the information from yaw rate/side G
sensor and wheel sensors, ESP judges the driving condition (conditions of understeer and oversteer) to
improve the stability by controlling brake on 4 wheels and engine output.
3. During ESP operation, SLIP indicator lamp flashes to inform the driver of the operation.
CAUTION:

During ESP operation, body and the brake pedal lightly vibrate and their mechanical noise may be
heard. This is a normal condition.

If vehicle is rotated on a turn table, or rolled and rocked on a ship, the ABS warning lamp,
ESP OFF indicator lamp, and SLIP indicator lamp may turn on. In this case, start engine on a nor-
mal road again. If the ABS warning lamp, ESP OFF indicator lamp, and SLIP indicator lamp turn
off after the restart, it is normal.

When driving in a steep slope such as a bank, ABS warning lamp, ESP OFF indicator lamp, and
SLIP indicator lamp may turn on. In this case, start the engine on a normal road again. If ABS
warning lamp, ESP OFF indicator lamp, and SLIP indicator lamp turn off after the restart, it is nor-
mal.
TCS FunctionEFS0019V
1. With the wheel sensor signals from 4 wheels, the ESP/TCS/ABS control unit detects a wheel spin. If a
wheel spins, the control unit controls brake fluid pressure to the spinning wheel, and cuts the fuel to the
engine. It also closes the throttle valve to reduce the engine torque. Furthermore, throttle position is con-
trolled to the appropriate engine torque.
2. If a wheel spins, the TCS system works and function by applying brake fluid pressure to the spinning
wheel.
SFIA2012E

BRC-54
[ESP/TCS/ABS]
SYSTEM DESCRIPTION

3. During TCS operation, it informs a driver of system operation by flashing SLIP indicator lamp.
CAUTION:

During TCS operation, body and brake pedal lightly vibrate and the mechanical noise may be
heard. This is a normal condition.

Depending on road circumstances, a driver may have a sluggish feel. This is not malfunction,
because the optimum traction has the highest priority by TCS operation.

When the vehicle is passing through a road where the surface friction coefficient varies, down-
shifting or depressing the accelerator pedal fully may activate TCS temporarily.
ABS FunctionEFS0019U
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 wheel speed and controlling brake fluid pressure.
2. EBD is integrated in ESP/TCS/ABS system.
CAUTION:

During ABS operation, brake pedal lightly vibrates and its mechanical noise may be heard. This is
a normal condition.

When starting engine, or just after starting vehicle, brake pedal may vibrate or the motor operating
noise may be heard from engine compartment. This is a normal status of the operation check.

The stopping distance may be longer than that of vehicles without ABS when vehicle drives on
rough, gravel, or snowy (fresh deep snow) road.
EBD FunctionEFS004HO

Electronic Brake Distributor is a function that detects subtle slippages between front and rear wheels dur-
ing braking, and it improves handling stability by electronically controlling the brake fluid pressure which
results in reduced rear wheel slippage.

In case of electrical system break down, the fail-safe function is activated, EBD and ABS becomes inoper-
ative, and ABS warning lamp and brake warning lamp are turned on.

Electrical System Diagnosis by CONSULT-II is available.
Fail-Safe FunctionEFS004HP
ESP/ TCS SYSTEM
In case of throttle control system trouble, ESP OFF indicator lamp and SLIP indicator lamp are turned on, and
the condition of vehicle is the same as the condition of vehicles without ESP/TCS equipment. In case of trou-
ble to the throttle control system, the ABS control continues to operate normally without ESP/TCS control.
CAUTION:
If the fail-safe function is activated, then perform the self- diagnosis for ESP/TCS/ABS control system.
ABS, EBD SYSTEM
In case of electrical malfunctions with the ABS, ABS warning lamp, ESP OFF indicator lamp and SLIP indica-
tor lamp will turn on. In case of electrical malfunctions with the EBD, brake warning lamp, ABS warning lamp,
ESP OFF indicator lamp and SLIP indicator lamp will turn on. Simultaneously, the ESP/ TCS/ABS become one
of the following conditions of the fail-safe function.
1. For ABS trouble, only the EBD is activated and the condition of vehicle is the same condition of vehicles
without ESP/TCS/ABS equipment.
2. For EBD trouble, the EBD and ABS become inoperative, and the condition of vehicle is the same as the
condition of vehicles without ESP/TCS/ABS, EBD equipment.
NOTE:
In condition 1 described above, an ABS self-diagnosis sound may be heard. That is a normal condition
because a self-diagnosis for “Ignition switch ON” and “The first starting” are being performed.

SYSTEM DESCRIPTION
BRC-55
[ESP/TCS/ABS]
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BRC

Hydraulic Circuit DiagramEFS0019T
SFIA1663E

BRC-56
[ESP/TCS/ABS]
CAN COMMUNICATION

CAN COMMUNICATIONPFP:23710
System DescriptionEFS0067I
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitEFS0067J
TYPE 4/TYPE 5
System diagram
Input/output signal chart
T: Transmit R: Receive Body typeWagon
Axle4WD 2WD
Engine YD22DDTi QR25DE YD22DDTi
Transmission M/T A/T M/T
Brake controlESP
CAN system type 4 5 6 9
ECM×× × ×
TCM×
ESP/TCS/ABS control unit×× × ×
ABS actuator and electric unit (control unit)
Steering angle sensor×× × ×
4WD control unit×× ×
Combination meter×× × ×
PKIA9634E
Signals ECMESP/TCS/ABS
control unitSteering angle
sensor4WD control
unitCombination
meter
4WD mode indicator lamp signalTR
4WD warning lamp signalTR
A/C compressor feedback signal*
2TR

CAN COMMUNICATION
BRC-57
[ESP/TCS/ABS]
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*1: YD engine models only
*2: QR engine models only
TYPE 6
System diagram
Input/output signal chart
T: Transmit R: Receive A/C switch signal*
1RT
ABS warning lamp signal T R
Accelerator pedal position signal T R R
Brake warning lamp signal T R
Engine coolant temperature signal TR
Engine speed signal T R R R
ESP OFF indicator lamp signal T R
Glow indicator lamp signal*1 TR
MI signal TR
Stop lamp switch signal T R
Vehicle speed signalTRR
RT
SLIP indicator lamp signal T R
Parking brake switch signalRT
Steering angle sensor signal R T
ASCD SET lamp signal TR
ASCD CRUISE lamp signal TR Signals ECMESP/TCS/ABS
control unitSteering angle
sensor4WD control
unitCombination
meter
PKIA9635E
Signals ECM TCMESP/TCS/
ABS control
unitSteering
angle sensor4WD control
unitCombination
meter
4WD mode indicator lamp signalTR
4WD warning lamp signalTR
A/C compressor feedback signal TR