2005 NISSAN X-TRAIL ESP

TF-18
ALL MODE 4X4 SYSTEM

*1: YD engine models only
*2: QR engine models only
TYPE 6
System diagram
Input/output signal chart
T: Transmit R: Receive
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
A/T position indicator lamp signal T R R
A/T self-diagnosis signal R T
ABS warning lamp signal T R
Accelerator pedal position signal T R R
Brake warning lamp signal T R
Closed throttle position signal T R
Engine and A/T integratedTR
RT
Engine coolant temperature signal TR
Engine speed signal T R R R
ESP OFF indicator lamp signal T R
MI signal TR
O/D OFF indicator signal T R
Output shaft revolution signal R T
Overdrive control switch signal R T
P·N range signal R T
SLIP indicator lamp signal T R
Steering angle sensor signal R T

ALL MODE 4X4 SYSTEM
TF-19
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B
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Stop lamp switch signalRT
TR
Vehicle speed signalTRR
RT
Parking brake switch signalRT
Wide open throttle position signal T R
ASCD SET lamp signal TR
ASCD CRUISE lamp signal TR Signals ECM TCMESP/TCS/
ABS control
unitSteering
angle sensor4WD control
unitCombination
meter

TF-30
TROUBLE DIAGNOSIS

4WD Control Unit Input/Output Signal Reference ValuesEDS001VK
4WD CONTROL UNIT INSPECTION TABLE
Specifications with CONSULT-II
Monitor item [Unit] Content Condition Display value
FR RH SENSOR [km/h] or [mph]Wheel speed (Front wheel
right)Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition.Approximately equal to
the indication on speed-
ometer (Inside of ±10%)
FR LH SENSOR [km/h] or [mph]Wheel speed (Front wheel
left)Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition.Approximately equal to
the indication on speed-
ometer (Inside of ±10%)
RR RH SENSOR [km/h] or [mph]Wheel speed (Rear wheel
right)Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition.Approximately equal to
the indication on speed-
ometer (Inside of ±10%)
RR LH SENSOR [km/h] or [mph]Wheel speed (Rear wheel
left)Vehicle stopped 0.00 km/h (0.00 mph)
Vehicle running
CAUTION:
Check air pressure of tire under
standard condition.Approximately equal to
the indication on speed-
ometer (Inside of ±10%)
BATTERY VOLT [V]Power supply voltage for
4WD control unitIgnition switch: ON Battery voltage
THRTL POS SEN [%] Throttle opening conditionWhen depressing accelerator pedal
(Value rises gradually in response to
throttle position.)0 - 100%
ETS SOLENOID [A]Monitored value of current at
4WD solenoidEngine speed
: At idle2WD Approx. 0.000A
AUTO Approx. 0.000A
LOCK Approx. 0.000A
Engine speed
: 3,000 rpm or more con-
stant2WD Approx. 0.000A
AUTO Approx. 0.000 - 1.500A*
LOCK Approx. 2.800A
STOP LAMP SW [ON/OFF]Condition of brake pedal
operationBrake pedal: Depressed ON
Brake pedal: Released OFF
ENG SPEED SIG [RUN/STOP] Condition of engine runningEngine stopped
(Engine speed: Less than 400 rpm)STOP
Engine running
(Engine speed: 400 rpm or more)RUN
ETS ACTUATOR [ON/OFF]Operating condition of 4WD
actuator relay (integrated in
4WD control unit)Engine stopped (Ignition
switch: ON)OFF
Engine running ON
4WD WARN LAMP [ON/OFF] 4WD warning lamp condition4WD warning lamp: ON ON
4WD warning lamp: OFF OFF
4WD MODE SW [2WD/AUTO/
LOCK]Input condition from 4WD
mode switch4WD mode switch2WD 2WD
AUTO AUTO
LOCK LOCK

TF-32
TROUBLE DIAGNOSIS

5. Touch “ALL MODE AWD/4WD”.
If “ALL MODE AWD/4WD” is not indicated, go to GI-35, "
CON-
SULT-II Data Link Connector (DLC) Circuit" .
6. Perform each diagnostic test mode according to each service
procedure.
SELF-DIAG RESULT MODE
Operation Procedure
1. Perform “CONSULT-II SETTING PROCEDURE”. Refer to TF-31, "CONSULT-II SETTING PROCEDURE"
.
2. Start engine and drive at 30 km/h (19 MPH) or more for approx. 1 minute.
3. Stop vehicle. With engine at idle, touch “SELF-DIAG RESULTS”.
Display shows malfunction experienced since the last erasing
operation.
NOTE:

The details for “TIME” are as follow:
–“0”: Error currently detected with 4WD control unit.
–Except for “0”: Error detected in the past and memorized
with 4WD control unit.
Detects frequency of driving after DTC occurs (frequency
of turning ignition switch “ON/OFF”).
Display Item List
CAUTION:

If “CAN COMM CIRCUIT [U1000]” is displayed with other DTCs, first perform the trouble diagnosis for CAN communica-
tion line.

Make sure that ABS warning lamp turns OFF by driving for a minute at vehicle speed of 30 km/h (19 MPH) or more after
turning ignition switch “OFF” if 4WD warning lamp turns ON with system malfunction of “ABS SYSTEM [C1203]”. 4WD
warning lamp may not turn OFF if it is normal unless ignition switch turns OFF at once and engine restarts after that.
BCIA0030E
SDIA2217E
Items (CONSULT-II screen
terms)Diagnostic item is detected when... Check item
CONTROLLER FAILURE
[C1201]Malfunction has occurred inside 4WD control unit.TF-36, "
4WD Control Unit"
ABS SYSTEM
[C1203]Malfunction related to wheel sensor has been detected by ABS actu-
ator and electric unit (control unit) (without ESP) or ESP/TCS/ABS
control unit (with ESP).TF-36, "ABS System"
4WD SOLENOID
[C1204]Malfunction related to 4WD solenoid has been detected.TF-37, "4WD Solenoid"
4WD ACTUATOR RLY
[C1205]Malfunction has been detected from 4WD actuator relay integrated
with 4WD control unit, or malfunction related to 4WD solenoid has
been detected.TF-40, "4WD Actuator
Relay" or TF-37, "4WD
Solenoid"
MODE SW
[C1209]More than two switch inputs are simultaneously detected due to
short circuit of 4WD mode switch.TF-42, "4WD Mode Switch"
ENGINE SIGNAL 1
[C1210]Malfunction has been detected from ECM.TF-44, "Engine Control Sig-
nal"
CAN COMM CIRCUIT
[U1000]Malfunction has been detected from CAN communication line.TF-45, "CAN Communica-
tion Line"
NO DTC IS DETECTED.
FURTHER TESTING MAY BE
REQUIRED.No NG item has been detected. —

TF-36
TROUBLE DIAGNOSIS FOR SYSTEM

2. CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect 4WD control unit harness connector.
3. Check continuity between 4WD control unit harness connector
M107 terminals 10 (B/R), 11 (B/R) and ground.
Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
3. CHECK DTC
Start engine.
Does 4WD warning lamp turn OFF?
YES >>INSPECTION END
NO >> Perform the self-diagnosis, repair or replace damaged parts. Refer to TF-32, "
SELF-DIAG
RESULT MODE" .
4WD Control UnitEDS001VN
DIAGNOSTIC PROCEDURE

Check the following if “CONTROLLER FAILURE [C1201]” is displayed in self-diagnosis results of CON-
SULT-II.
1. PERFORM SELF-DIAGNOSIS
With CONSULT-II
1. Turn ignition switch “ON”. (Do not start engine.)
2. Select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with CONSULT-II.
3. Touch “ERASE”.
4. Turn ignition switch “OFF” and wait at least 10 seconds.
5. Perform the self-diagnosis again.
Is the
“CONTROLLER FAILURE [C1201]” displayed?
YES >> Replace 4WD control unit. Refer to TF-54, "4WD CONTROL UNIT" .
NO >>INSPECTION END
ABS SystemEDS001VO
DIAGNOSTIC PROCEDURE

Check the following if “ABS SYSTEM [C1203]” is displayed in self-diagnosis results of CONSULT-II.
1. CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) OR ESP/TCS/ABS/
CONTROL UNIT
Perform self-diagnosis with ABS actuator and electric unit (control unit) (without ESP) or ESP/TCS/ABS con-
trol unit (with ESP). Refer to BRC-28, "
SELF-DIAGNOSIS" (without ESP) or BRC-81, "SELF-DIAGNOSIS"
(with ESP).
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.Continuity should exist.
SDIA2305E

TROUBLE DIAGNOSIS FOR SYSTEM
TF-37
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TF

2. CHECK DTC AFTER DRIVING
1. Turn ignition switch “OFF”.
2. Start engine and drive vehicle at 30 km/h (19 MPH) for at least 1 minute.
3. Make sure that ABS warning lamp turns OFF.
4. Perform erase self-diagnostic results. Refer to TF-33, "
How to Erase Self-diagnostic Results" .
5. Stop vehicle and turn ignition switch “OFF”.
6. Turn ignition switch “ON”.
7. Perform self-diagnosis.
Is the
“ABS SYSTEM [C1203]” displayed?
YES >> GO TO 3.
NO >>INSPECTION END
3. CHECK 4WD CONTROL UNIT
Check 4WD control unit input/output signal. Refer to TF-30, "
4WD Control Unit Input/Output Signal Reference
Va l u e s" .
OK or NG
OK >> GO TO 4.
NG >> Check 4WD control unit pin terminals for damage or loose connection with harness connector. If
any items are damaged, repair or replace damaged parts.
4. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >>INSPECTION END
NG >> Perform self-diagnosis with ABS actuator and electric unit (control unit) (without ESP) or ESP/
TCS/ABS control unit (with ESP) again. Refer to BRC-28, "
SELF-DIAGNOSIS" (without ESP) or
BRC-81, "
SELF-DIAGNOSIS" (with ESP).
4WD SolenoidEDS002VH
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
*: The values are changed by throttle opening and engine speed.
DIAGNOSTIC PROCEDURE

Check the following if “4WD SOLENOID [C1204]” is detected in self-diagnosis results of CONSULT-II.
Monitor item [Unit] Condition Display value
ETS SOLENOID [A]Engine speed: At idle2WD mode
Approx. 0.000A AUTO mode
LOCK mode
Engine speed: 3,000 rpm or more constant2WD mode Approx. 0.000A
AUTO mode Approx. 0.000 - 1.500A*
LOCK mode Approx. 2.800A

BR-1
BRAKE SYSTEM
F BRAKES
CONTENTS
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SECTION BR
A
B
BR

BRAKE SYSTEM
PRECAUTIONS .......................................................... 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
Precautions for Brake System .................................. 3
PREPARATION ........................................................... 4
Special Service Tools ............................................... 4
Commercial Service Tools ........................................ 4
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING ................................................ 5
NVH Troubleshooting Chart ..................................... 5
BRAKE PEDAL .......................................................... 6
On-Vehicle Inspection and Adjustment .................... 6
Components ............................................................. 7
Removal and Installation .......................................... 7
REMOVAL ............................................................. 7
INSPECTION AFTER REMOVAL ......................... 7
INSTALLATION ..................................................... 7
BRAKE FLUID ............................................................ 8
Checking Brake Fluid Level ..................................... 8
Checking Brake Line ................................................ 8
Changing Brake Fluid ............................................... 8
Bleeding Brake System ............................................ 9
BRAKE PIPING AND HOSE .................................... 10
Hydraulic Piping ..................................................... 10
Removal and Installation of Front Brake Piping and
Brake Hose ............................................................. 11
REMOVAL ............................................................ 11
INSTALLATION ................................................... 12
Removal and Installation of Rear Brake Piping and
Brake Hose ............................................................ 12
REMOVAL ........................................................... 12
INSTALLATION ................................................... 12
Inspection ............................................................... 13
BRAKE MASTER CYLINDER .................................. 14
Components ........................................................... 14
Removal and Installation ........................................ 14
REMOVAL ........................................................... 14INSTALLATION ................................................... 14
Disassembly and Assembly .................................... 15
MODELS WITHOUT ESP (PISTON STOPPER
APPLIED.) ........................................................... 15
MODELS WITHOUT ESP (PISTON STOPPER
NOT APPLIED.) .................................................. 17
MODELS WITH ESP ........................................... 19
BRAKE BOOSTER ................................................... 23
On-Vehicle Inspection and Service ......................... 23
FUNCTION INSPECTION ................................... 23
AIRTIGHTNESS INSPECTION ........................... 23
Removal and Installation ........................................ 23
REMOVAL ........................................................... 23
INSPECTION AFTER REMOVAL ....................... 24
INSTALLATION ................................................... 24
VACUUM LINES ....................................................... 25
Removal and Installation ........................................ 25
Inspection ............................................................... 26
VISUAL INSPECTION ......................................... 26
CHECK VALVE INSPECTION ............................. 26
FRONT DISC BRAKE ............................................... 27
Component ............................................................. 27
Inspection ............................................................... 27
PAD THICKNESS ................................................ 27
Pad Replacement ................................................... 28
REMOVAL ........................................................... 28
INSTALLATION ................................................... 28
Caliper Removal and Installation ............................ 28
REMOVAL ........................................................... 28
INSTALLATION ................................................... 29
Caliper Disassembly and Assembly ....................... 29
DISASSEMBLY ................................................... 29
INSPECTION AFTER DISASSEMBLY ................ 29
DISC ROTOR INSPECTION ............................... 30
ASSEMBLY ......................................................... 30
BRAKE BURNISHING PROCEDURE ................. 31
REAR DISC BRAKE ................................................. 32
Component ............................................................. 32
Inspection ............................................................... 32
PAD WEAR INSPECTION ................................... 32

BRAKE MASTER CYLINDER
BR-15
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5. Refill with new brake fluid and bleed air from the brake piping.
Disassembly and AssemblyEFS001CH
MODELS WITHOUT ESP (PISTON STOPPER APPLIED.)
Disassembly
CAUTION:
Remove master cylinder reservoir tank only when necessary.
1. Using a slotted flat-bladed screwdriver as shown in the figure,
lever up stopper cap tabs and remove stopper cap. While
removing, be sure to hold cap securely to prevent the master
cylinder piston from popping out.
2. Secure cylinder body flange in a vise as shown in the figure.
CAUTION:

Secure cylinder body flange with chamfered pin insert
hole, facing upward.

When securing in the vise, use copper plates or cloth to
protect the flange.
3. Using a pin punch [tool: diameter Approx. 4 mm (0.16 in)],
remove reservoir tank mounting pins.
4. Remove master cylinder assembly from the vise.
5. Remove reservoir tank and grommet from the cylinder body.
6. Using a Phillips flat-bladed screwdriver, press and hold piston
pin as shown in the figure. Remove piston stopper from the cyl-
inder body.
7. Carefully pull primary piston assembly straight out to prevent
damage to the cylinder inner wall.
8. Tap flange against a wood block to loosen secondary piston
assembly. Carefully pull secondary piston assembly straight out
to prevent damage to the cylinder inner wall.
Inspection After Disassembly

Check cylinder inner wall for damage, wear, corrosion, and pinholes. Replace cylinder if damage, wear, or
corrosion is detected.
BRA0533D
BRA0588D
SFIA0342E
BRA0590D