tire pressure NISSAN X-TRAIL 2003 Electronic Repair Manual

AT-30
OVERALL SYSTEM
At Low Fluid Temperature
lFluid viscosity and frictional characteristics of the clutch facing change with fluid temperature. Clutch
engaging or band-contacting pressure is compensated for, according to fluid temperature, to stabilize
shifting quality.
lThe line pressure is reduced below 60°C(140°F) to prevent
shifting shock due to low viscosity of automatic transmission
fluid when temperature is low.
lLine pressure is increased to a maximum irrespective of the
throttle opening when fluid temperature drops to-10°C(14°F).
This pressure rise is adopted to prevent a delay in clutch and
brake operation due to extreme drop of fluid viscosity at low
temperature.
SHIFT CONTROL
The shift is regulated entirely by electronic control to accommodate vehicle speed and varying engine opera-
tions. This is accomplished by electrical signals transmitted by the revolution sensor and throttle position sen-
sor. This results in improved acceleration performance and fuel economy.
Control of Shift Solenoid Valves A and B
The TCM activates shift solenoid valves A and B according to sig-
nals from the throttle position sensor and revolution sensor to select
the optimum gear position on the basis of the shift schedule memo-
rizedintheTCM.
The shift solenoid valve performs simple ON-OFF operation. When
set to “ON”, the drain circuit closes and pilot pressure is applied to
the shift valve.
Relation Between Shift Solenoid Valves A and B and Gear Positions
SAT006J
SAT007J
SAT008J
Shift solenoid valveGear position
D1,21,11D2,22,12D3D4(OD) N-P
A ON (Closed) OFF (Open) OFF (Open) ON (Closed) ON (Closed)
B ON (Closed) ON (Closed) OFF (Open) OFF (Open) ON (Closed)

REFRIGERANT LINES
ATC-135
C
D
E
F
G
H
I
K
L
MA
B
AT C
6. Check clearance around the entire periphery of clutch disc.
If the specified clearance is not obtained, replace adjusting
spacer and readjust.
Break-in Operation
When replacing compressor clutch assembly, always carry out the break-in operation. This is done by engag-
ing and disengaging the clutch about thirty times. Break-in operation raises the level of transmitted torque.
Removal and Installation for Low-pressure flexible hoseEJS000VB
REMOVAL
1. Using the recycling and recovery equipment (for HFC134a), dis-
charge the refrigerant from A/C system.
2. Remove the clips from the low-pressure flexible hose.
3. Remove the mounting bolts from the low-pressure flexible hose
bracket.
4. Remove the clip from the vacuum hose.Disc to pulley clear-
ance: 0.2 - 0.5 mm (0.008 - 0.020 in)
RHA080CA
RJIA0074E
RJIA0584E

BRC-4
[4WD/ABS]
PRECAUTIONS
[4WD/ABS]PRECAUTIONSPFP:00001
Precautions for brake systemEFS001B6
lRecommended fluid is brake fluid “DOT 3 ”or “DOT 4”.
lNever reuse drained brake fluid.
lBe careful not to splash brake fluid on painted areas.
lTo clean or wash all parts of master cylinder, disc brake caliper and wheel cylinder, use clean brake fluid.
lNever use mineral oils such as gasoline or kerosene. They will ruin rubber parts of the hydraulic system.
lUse flare nut wrench when removing and installing brake tube.
lAlways torque brake lines when installing.
lBurnish 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 toBR-10, "
Brake Burnishing
Procedure".
lBefore working, turn OFF ignition switch. Disconnect connectors
for ABS actuator and control module or battery terminals.
WAR NIN G:
lClean brake pads and shoes with a waste cloth, then wipe
with a dust collector.
Precautions for brake controlEFS001B7
lIf malfunction is indicated by 4WD warning lamp and/or ABS warning lamp, collect necessary information
from customer (what symptoms are present under what conditions). Find out possible causes before start-
ing service. Besides electrical system inspection, check operation of ABS actuator.
lIf malfunction is detected, proceed to trouble diagnosis after checking tire pressure and tire wear.
lStopping distance or steering stability may be deteriorated by the following conditions. Tire size and type
are in improper combination. Brake pads are not Nissan genuine parts.
lFitting tires of different size on vehicle can be cause of longitudinal vibration. Always use tires of the same
size and brand. Exchange front and rear tires on the following conditions: Longitudinal vibration occurs in
vehicle with tires of the same size and brand. After replacement, perform trouble diagnosis. 1580|None
l4WD/ABS function may have a failure or error under following condition: There is radio, antenna, or
antenna lead-in wire (including wiring) near control module.
lIf aftermarket parts (e.g. Car stereo equipment, CD player) have been installed, check electrical har-
nesses for pinches, open, and improper wiring.
SBR686C

TROUBLE DIAGNOSIS
BRC-23
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
CAUTION:
1. Check air pressure of tire under normal condition.
2. ABS warning lamp ON/OFF timing
CONSULT-II FunctionsEFS001BH
CONSULT-II FUNCTION APPLICATION TABLE
4WD MODE MONI-
TOROutput condition of
drive mode indicator
lamp signalEngine running, vehi-
cle stoppedUsing drive mode
change-over switchDrive mode indicator lamp
and path
IMPROPER SIZE
TIRE MONITOR (mm)Improper size tire
installed condition- 0-4,4-8Front/Rear tire size differ-
ence, wear condition
PARKING BRAKE
SWITCH (ON/OFF)Parking brake switch
operating conditionParking brake
depressedON
Parking brake switch and
harness
Parking brake not
depressedOFF
METER OUTPUT
(km/h)Output condition of
vehicle speed for
speedometerWheel stopped 0 km/h
Speed meter and harness
Vehicle runningAlmost in accordance
with the wheel speed
sensor display
ON: When ignition switch is turned ON (before engine starts) or when malfunction is
detected
OFF: After engine is started (When the system is in normal condition)
Item Self-diagnosis Data monitor Active test
FR RH SENSOR´´-
FR LH SENSOR [OPEN]´´-
RR RH SENSOR´´-
RR LH SENSOR´´-
Speed sensor´--
Stop lamp switch -´-
FR RH IN ABS SOL´´´
FR RH OUT ABS SOL´´´
FR LH IN ABS SOL´´´
FR LH OUT ABS SOL´´´
RR RH IN ABS SOL´´´
RR RH OUT ABS SOL´´´
RR LH IN ABS SOL´´´
RR LH OUT ABS SOL´´´
ABS ACTUATOR RELAY´´-
ABS MOTOR RELAY´´´
ABS warning lamp -´-
Battery voltage´´-
Control module´--
ABS MOTOR´-´
Longitudinal G -sensor´´-
4WD solenoid valve´´´
4WD actuator relay -´-
Engine speed signal -´-
Throttle position sensor´´-

BRC-32
[4WD/ABS]
TROUBLE DIAGNOSIS
4WDSOLENOIDVALVE
lDisconnect connector and measure resistance between termi-
nals B152 No. 1 (L/W) and No. 2 (LG).
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:
lIf 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.
lIf 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.
lIf 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.
lIf 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 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 Speed Sensor SystemEFS001BL
INSPECTION PROCEDURE
1.TIRE INSPECTION
Check 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. 2.45W
SDIA0136E

TROUBLE DIAGNOSIS
BRC-41
[4WD/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
4WD MODES CANNOT BE SWITCHED AFTER ENGINE IS STARTED
1.INSPECTION USING 4WD MODE CHANGE-OVER SWITCH
lDrive modes cannot be switched after the engine is started.
lOn data monitor screen of the CONSULT-II, check 4WD mode switch.
lCheck if the display changes from ## to 2WD mode when the 2WD switch is pressed.
lCheck if the display changes from ## to AUTO mode when the AUTO switch is pressed.
lCheck if the display changes from ## to LOCK mode when the LOCK switch is pressed.
OK or NG
OK >> No malfunction detected.
NG >>
lCONSULT-II display does not change from ## when the 2WD switch is pressed. Check harness
of the 2WD switch.
lCONSULT-II display does not change from ## when the AUTO switch is pressed. Check har-
ness of the 2WD switch and LOCK switch.
lCONSULT-II display does not change from ## when the LOCK switch is pressed. Check har-
ness of the LOCK switch.
lPerform 4WD mode change-over switch inspection.
WHILE DRIVING, 4WD WARNING LAMP FLASHES RAPIDLY. (WHEN IT FLASHERS FOR
APPROX. ONE MINUTE, THEN DOES NOT ILLUMINATE.)
lWhile driving, 4WD warning lamp flashes rapidly. (When it flashes for Approx. One minute, then does not
illuminate.)
Rapid flashing: 2 times/second
This phenomenon protects drivetrain parts when a heavy load is applied to the electronically controlled
coupling and multiple disc clutch temperature increases. It is not a malfunction.
When the difference of revolution speed by or with the front and rear wheel with AUTO mode, the shift
switch occasionally changes to LOCK mode automatically. This is not a malfunction.
When the difference of revolution speed between the front and rear wheel with AUTO mode, the shift
switch occasionally changes to LOCK mode automatically. This is not a malfunction.
WHILE DRIVING, 4WD WARNING LAMP FLASHES SLOWLY. (WHEN IT CONTINUES TO ILLU-
MINATE UNTIL ENGINE TURNS OFF.)
1. Check using the data monitor function of the CONSULT-II.
lPerform inspection with the data monitor function of the CONSULT-II.
lCheck if the value of IMPROPER SIZE TIRE MONITOR is 8 mm (0.31 in) or more.
lStop the engine. Restart the engine and drive the vehicle at 20 km/h (12 MPH) or faster for approxi-
mately 200 seconds. Confirm the 4WD warning lamp flashes slowly.
(Check if the value of IMPROPER SIZE TIRE MONITOR is 8 mm (0.31 in) or more.)
When the tire size is normal, the value of IMPROPER SIZE TIRE MONITOR will change from 8 mm
(0.31 in) or more to 0 to 4 mm (0 to 0.16 in) (normal condition) after the vehicle is driven 20 km/h (12
MPH) or faster for approximately 5 seconds.
2. Tire inspection
lInspection of tire pressure
lWear condition
lCheck size of the front and rear tires. (No excessive difference should be observed.) Refer toGI-46,
"Wheels&Tires"
VEHICLE DOES NOT ENTER 4WD MODE EVEN THOUGH 4WD WARNING LAMP IS OFF.
1. Check using the data monitor function of the CONSULT-II.
Perform inspection by the data monitor function of the CONSULT-II.
–Check if the vehicle operation changes to 2WD, AUTO, and LOCK modes.
–Check current supplied to the 4WD solenoid valve in AUTO mode.
Accelerator pedal not depressed: Approx. 0 A
Accelerator pedal depressed: Approx. 2.8 A

BRC-46
[4WD/ABS]
TROUBLE DIAGNOSIS
lStop the engine. Restart the engine and drive the vehicle at 20 km/h or faster for approximately 200
seconds. Confirm the 4WD warning lamp flashes slowly.
(Check if the value of IMPROPER SIZE TIRE MONITOR is 8 mm or more.)
When the tire size is normal, the value of IMPROPER SIZE TIRE MONITOR will change from 8 mm or
more to 0 - 4 mm (normal condition) after the vehicle is driven 20 km/h or faster for approximately 5
seconds.
2. Tire inspection
lInspection of tire air pressure
lWear condition
lCheck size of the front and rear tires. (No excessive difference should be observed.) Refer toGI-46,
"Wheels&Tire s"
Vehicle does not enter 4WD mode even though 4WD warning lamp is off.EFS001BX
1. Check using the data monitor function of the CONSULT.
Perform inspection by the data monitor function of the CONSULT.
–Check if the vehicle operation changes to 2WD, AUTO, and LOCK modes.
–Check current supplied to the E-TS solenoid valve in AUTO mode.
2. Check using the active test function of the CONSULT.
Using active test mode of CONSULT, supply current to the E-TS solenoid valve and check that the monitor
current becomes close to this supply current.
lThe 4WD/ABS control unit is normal when the difference between E-TS solenoid valve current and the
monitor current is within±10%.
It is necessary to inspect the electronically controlled coupling assembly.
Tight-corner braking symptom occurs when the vehicle is started in AUTO
mode (4WD warning lamp remain OFF).
EFS001BY
1.THROTTLE POSITION SENSOR AND HARNESS INSPECTION
Check accelerator pedal stroke.
Is inspection result OK?
YES >> Perform self-diagnosis again.
NO >> Malfunctioning throttle position sensor harness
E-TS actuator relay (4WD solenoid actuator relay) turns ON/OFF frequently.EFS001BZ
1.SELF-DIAGNOSIS RESULT IS E-TS ACTUATOR RELAY (4WD ACTUATOR RELAY) ON ERROR
AND OFF ERROR.
Is self-diagnosis result [ON error and OFF error]?
Is inspection result OK?
YES >> GO TO 2.
NO >> Repair or replace as necessary.
2.E-TS ACTUATOR RELAY (4WD SOLENOID ACTUATOR RELAY) AND HARNESS INSPECTION
Is self-diagnosis result [ON error and OFF error]?
Is inspection result OK?
YES >> Perform self-diagnosis again.
NO >> Malfunctioning E-TS actuator relay (4WD solenoid actuator relay) harnessAccelerator pedal not depressed: Approx. 0 A
Accelerator pedal depressed: Approx. 2.8 A
Example) Monitor value becomes Approx. 1 A for E-TS solenoid current 1 A setting.

BRC-74
[ESP/TCS/ABS]
TROUBLE DIAGNOSIS
(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: When the ignition switch is turned ON (before engine start) or a malfunction is detected.
OFF: 2 seconds after the engine started (the system is in normal condition).
(Note 4): ESP OFF indicator lamp ON/OFF timing
ON: When the ignition switch is turned ON (before engine start) or a malfunction is detected, if the ESP OFF switch is ON.
OFF: 2 seconds after the engine started (the system is in normal condition) and ESP OFF switch is OFF.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 /Side G
sensor and circuit
34
Yaw rate/Side G sensorIgnition switch ON Battery voltage (Approx. 12V)
Yaw rate /Side G
sensor and circuit 77 Ignition switch ON
78 Ignition switch ON Approx. 2.5V
79
Ya w r a t e s e n s o rIgnition 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
warningswitchand
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

TROUBLE DIAGNOSIS
BRC-77
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
(Note 1): Check the pressure of the tire in normal condition.
(Note 2): 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 3): 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.
OFF: Approximately 0.5 seconds after the ignition switch is turned ON (when the system is in normal operation) or when ESP OFF
switch is OFF.
(Note 4): SLIP indicator lamp ON/OFF timing
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) and ESP/TCS function
is not activated.
Flashing: ESP/TCS function is active during driving.
Functions of CONSULT-IIEFS001A7
CONSULT-II MAINLY FUNCTION APPLICATION TO ESP/TCS/ABS
´: Applicable
–: Not applicableFLUID LEV SWBrake fluid level warn-
ingswitchstatus.When brake fluid level warning
switch is ON.ON
Brake fluid level warning
switch, brake warning
lamp and circuit. When brake fluid lever warning
switch is OFF.OFF
EBD FAIL SIG
ABS FAIL SIG
TCS FAIL SIG
VDC FAIL SIGSystem fail signal sta-
tusMalfunctions condition
(When system failed)OFFEBD system
ABS system
TCS system
ESP system Data monitor item ContentsData monitor
(Reference) Check items
for malfunction
ConditionReference value in
normal operation
Item Self-diagnosis Data monitor Active test
Wheel speed sensors´´–
Solenoid valves´´´
Switch-over solenoid valves´´´
Stop lamp switch´´–
Ya w r a te s e n s o r´´´
Side G sensor´´´
Press sensor´´´
Steering angle sensor´´´
Actuator relay´´´
Motor relay´´´
ABS warning lamp –´´
Battery voltage´´–
ESP/TCS/ABS C/U´––
ESP/TCS/ABS actuator motor´´´
CAN communication´´–
Engine speed signal –´–
ESP OFF switch –´–
ESP OFF indicator lamp –´´
SLIP indicator lamp –´´
Throttle angle –´–

TROUBLE DIAGNOSIS
BRC-91
[ESP/TCS/ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC
3.CHECK WHEEL SPEED SENSOR CIRCUIT
1. Disconnect connectors of the ESP/TCS/ABS control unit and
wheel speed sensors.
2. Check for continuity among the ESP/TCS/ABS control unit
(vehicle-side connector) and wheel speed sensors (vehicle-side
connector), body grand.
Is inspection result OK?
YES >> GO TO 4
NO >> Repair harness and connector between the control unit and the wheel speed sensor.
4.INSPECTION THE TIRE
Check the tire pressure, wear, size.
Check if the pressure, wear, and size are in range of the standard?
YES >> GO TO 5
NO >> Adjusting tire pressure, and replace tire.
SFIA0372E
ESP/TCS/ABS control unit
(vehicle-side connector)Wheel speed sensor
(Vehicle-side connector)Continuity (Resistance)
Front RH15 1
Ye s ( 0 - 0 . 5W)
16 2
Front LH81
Ye s ( 0 - 0 . 5W)
10 2
Rear RH11 2
Ye s ( 0 - 0 . 5W)
12 1
Rear LH13 2
Ye s ( 0 - 0 . 5W)
14 1
ESP/TCS/ABS control unit
(vehicle-side connector)Body ground Continuity
Grand line28 —
Ye s
29 —