2003 NISSAN X-TRAIL Service Repair Manual

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Page 2585 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual TRANSFER OIL
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TRANSFER OILPFP:KLD30
ReplacementEDS001W2
DRAINING
CAUTION:
When draining oil, protect exhaust tube with cover.
1. Run the vehicle to warm up the transfer

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NISSAN X-TRAIL 2003 Service Repair Manual TF-10
ALL MODE 4X4 SYSTEM

ALL MODE 4X4 SYSTEMPFP:47850
Power Transfer DiagramEDS001VA
System DescriptionEDS001VB
ELECTRIC CONTROLLED COUPLING
Operation Principle
1. The 4WD control unit supplies com

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NISSAN X-TRAIL 2003 Service Repair Manual ALL MODE 4X4 SYSTEM
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4WD MODE SWITCH
AUTO Mode
Electronic control allows optimal distribution of torque to front/rear wheels to match road conditions.
4WD mode makes

ALL MODE 4X4 SYSTEM
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4WD MODE SWITCH
AUTO Mode
Electronic control allows optimal distribution of torque to front/rear wheels to match road conditions.
4WD mode makes possible stable driving, with no wheel spin, on snowy roads or other slippery surfaces.
On roads which do not require 4WD, AUTO mode contributes to improved fuel economy by driving in con-
ditions close to front-wheel drive.
Sensor inputs determine the vehicle's turning condition, and tight cornering/braking are controlled by dis-
tributing optimum torque to rear wheels.
LOCK Mode
Front/rear wheel torque distribution is fixed, ensuring stable driving when climbing slopes.
Vehicle will switch automatically to AUTO mode if vehicle speed increases. If vehicle speed then
decreases, the vehicle automatically returns to direct 4-wheel driving conditions.
LOCK mode will change to AUTO mode automatically, when the vehicle speed exceeds approx. 30 km/h
(19 MPH). The LOCK indicator light keeps illuminating.
NOTE:
If there is a significant difference in pressure or wear between tires, full vehicle performance is not available.
LOCK mode may be prohibited, or speeds at which LOCK mode is enabled may be restricted detecting tire
conditions.
2WD Mode
Vehicle is in front-wheel drive.
NOTE:
If front wheels are slipping in 2WD mode, do not switch to AUTO or LOCK. This can cause difficulties for
the system.
Even if the 4WD mode switch is in 2WD mode, the 4WD control unit occasionally automatically change to
AUTO mode depending on the driving condition (For example; Depressing the acceleration firmly). This is
not malfunction. However, 4WD indicator lamp dose not illuminate.
4WD INDICATOR LAMP AND LOCK INDICATOR LAMP
The following is the indications of indicator lamp.
4WD WARNING LAMP
Turns ON when there is a malfunction in 4WD system. It indicates that the vehicle is in fail-safe mode and
change to front-wheel drive or shifting driving force-4WD (Rear-wheels still have some driving torque).
Also turns ON when ignition switch is turned ON, for purpose of lamp check. Turns OFF approximately for 1
seconds after the engine starts if system is normal.
4WD Warning Lamp Indication
Condition 4WD indicator lamp LOCK indicator lamp
AUTO mode ON OFF
LOCK mode ON ON
2WD mode OFF OFF
Lamp check Turns ON for approx. 1 second when ignition switch is turned ON.
SDIA2298E
Condition 4WD warning lamp
Lamp checkTurns ON when ignition switch is turned ON. Turns OFF
approx. 1 seconds after engine start.
4WD system malfunctionON
Protection function is activated due to heavy load to electric con-
trolled coupling. (4WD system is not malfunctioning and 4WD system
changes to 2WD mode.)Rapid flashing: 2 times/second
(Flashing in approx. 1 minute and then turning OFF.)

Page 2588 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual TF-12
ALL MODE 4X4 SYSTEM

System DiagramEDS001VC
Large difference in diameter of front/rear tiresSlow flashing: 1 time/2 seconds
(Continuing to flash until turning ignition switch OFF)
Other than ab

Page 2589 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual ALL MODE 4X4 SYSTEM
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COMPONENTS FUNCTION DESCRIPTION
CAN CommunicationEDS0027K
SYSTEM DESCRIPTION
CAN (Controller Area Network) is a serial communication line for rea

ALL MODE 4X4 SYSTEM
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COMPONENTS FUNCTION DESCRIPTION
CAN CommunicationEDS0027K
SYSTEM DESCRIPTION
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 UNIT (M/T MODELS WITHOUT ESP)
System diagram
Component parts Function
4WD control unit
Controls driving force distribution by signals from each sensor and switch from front wheel driving
mode (100:0) to 4WD mode (50:50).
2WD mode is available by fail-safe function if malfunction is detected in electrical system.
Wheel sensors Detects wheel speed.
4WD solenoid Controls electric controlled coupling by operation signal from 4WD control unit.
Electric controlled coupling Transmits driving force to rear final drive.
4WD mode switch Able to select from 2WD, AUTO or LOCK mode.
4WD warning lamp
Illuminates if malfunction is detected in electrical system of 4WD system.
There is 1 blink in 2 seconds if rotation difference of front wheels and rear wheels is large.
There are 2 blinks in 1 second if load is still applied to driving parts.
4WD indicator lamp Indicate operation with optimal distribution of torque to front/rear wheels.
LOCK indicator lamp Indicate that 4WD system is under direct 4-wheel driving mode.
ABS actuator and electric unit
(control unit) (without ESP) or
ESP/TCS/ABS control unit (with
ESP)Transmits the following signals via CAN communication to 4WD control unit.
Vehicle speed signal
Stop lamp switch signal (brake signal)
ECMTransmits the following signals via CAN communication to 4WD control unit.
Accelerator pedal position signal
Engine speed signal
Unified meter control unit Transmits conditions of parking brake switch via CAN communication to 4WD control unit.
PKIA6458E

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NISSAN X-TRAIL 2003 Service Repair Manual TF-14
ALL MODE 4X4 SYSTEM

Input/output signal chart
T: Transmit R: Receive
CAN COMMUNICATION UNIT (A/T MODELS WITHOUT ESP)
System diagram
Input/output signal chart
T: Transmit R: Receive Signals

Page 2591 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual ALL MODE 4X4 SYSTEM
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CAN COMMUNICATION UNIT (M/T MODELS WITH ESP)
System diagram
Input/output signal chart
T: Transmit R: Receive Engine speed signal T R R
Engine co

Page 2592 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual TF-16
ALL MODE 4X4 SYSTEM

*1: YD engine models only
*2: QR engine models only
CAN COMMUNICATION UNIT (A/T MODELS WITH ESP)
System diagram
Input/output signal chart
T: Transmit R: Receive Vehicle s

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