2003 NISSAN X-TRAIL brake sensor

AT-284
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Large shock changing from “12 ” to “11
” in “1” position.ON vehicle 1. Control valve assemblyAT-404
OFF vehicle 2. Low & reverse brakeAT-483
Transmission overheats. ON vehicle1. Fluid levelAT-256
2. Engine idling rpmEC-506
3. Accelerator pedal position (APP) sensorAT-345
4. Line pressure testAT-260
5. Line pressure solenoid valveAT-387
6. Control valve assemblyAT-404
Transmission overheats. OFF vehicle7. Oil pumpAT-443
8. Reverse clutchAT-464
9. High clutchAT-469
10. Brake bandAT-497
11. Forward clutchAT-475
12. Overrun clutchAT-475
13. Low & reverse brakeAT-483
14. Torque converterAT-423
ATF shoots out during operation.
White smoke emitted from exhaust
pipe during operation.ON vehicle 1. Fluid levelAT-256
OFF vehicle2. Reverse clutchAT-464
3. High clutchAT-469
4. Brake bandAT-497
5. Forward clutchAT-475
6. Overrun clutchAT-475
7. Low & reverse brakeAT-483
Offensive smell at fluid charging pipe.ON vehicle 1. Fluid levelAT-256OFF vehicle2. Torque converterAT-423
3. Oil pumpAT-443
4. Reverse clutchAT-464
5. High clutchAT-469
6. Brake bandAT-497
7. Forward clutchAT-475
8. Overrun clutchAT-475
9. Low & reverse brakeAT-483
Torque converter is not locked up. ON vehicle1. Accelerator pedal position (APP) sensorAT-345
2. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTRAT-332, AT-339
3. Engine speed signalAT-382
4. A/T fluid temp sen circ and TCM pow
sourAT-374
5. Line pressure testAT-260
6. Torque converter clutch solenoid valveAT-368
7. Control valve assemblyAT-404
Torque converter is not locked up. OFF vehicle 8. Torque converterAT-423
Symptom Condition Diagnostic Item Reference Page

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
AT-285
[EXC.F/EURO-OBD]
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Torque converter clutch piston slip.ON vehicle1. Fluid levelAT- 2 5 6
2. Accelerator pedal position (APP) sensorAT- 3 4 5
3. Line pressure testAT- 2 6 0
4. Torque converter clutch solenoid valveAT- 3 6 8
5. Line pressure solenoid valveAT- 3 8 7
6. Control valve assemblyAT- 4 0 4
OFF vehicle 7. Torque converterAT- 4 2 3
Lock-up point is extremely high or low.
AT- 3 11ON vehicle1. Accelerator pedal position (APP) sensorAT- 3 4 5
2. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTRAT- 3 3 2, AT-339
3. Torque converter clutch solenoid valveAT- 3 6 8
4. Control valve assemblyAT- 4 0 4
A/T does not shift to “D4 ” when driv-
ing with overdrive control switch “ON”.ON vehicle1. Accelerator pedal position (APP) sensorAT- 3 4 5
2. PNP switchAT- 3 2 4
3. Overdrive control switchAT- 3 2 4
4. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTRAT- 3 3 2, AT-339
5. Shift solenoid valve AAT- 3 5 0
6. Overrun clutch solenoid valveAT- 3 6 2
7. Control valve assemblyAT- 4 0 4
8. A/T fluid temp sen circ and TCM pow
sourAT- 3 7 4
9. Line pressure testAT- 2 6 0
A/T does not shift to “D4 ” when driv-
ing with overdrive control switch “ON”.OFF vehicle10. Brake bandAT- 4 9 7
11. Overrun clutchAT- 4 7 5
Engine is stopped at “R”, “D”, “2” and
“1” positions.ON vehicle1. Fluid levelAT- 2 5 6
2. Torque converter clutch solenoid valveAT- 3 6 8
3. Shift solenoid valve AAT- 3 5 0
4. Shift solenoid valve BAT- 3 5 6
5. Control valve assemblyAT- 4 0 4
Symptom Condition Diagnostic Item Reference Page

AT-322
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSES FOR SYMPTOMS

Vehicle Does Not Decelerate By Engine BrakeECS00EBX
SYMPTOM:

Vehicle does not decelerate by engine brake when turning overdrive control switch OFF.

Vehicle does not decelerate by engine brake when shifting A/T from “D” to “2” position.

Vehicle does not decelerate by engine brake when shifting from 22 (12 ) to 11 .
1. CHECK PNP SWITCH CIRCUIT
Check PNP switch circuit. Refer to AT- 3 2 4 , "
TCM Self-diagnosis Does Not Activate" .
OK or NG
OK >> GO TO 2.
NG >> Check PNP switch circuit. Refer to AT- 3 2 4 , "
TCM Self-diagnosis Does Not Activate" .
2. ADJUST CONTROL CABLE
Check control cable. Refer to AT- 4 0 9 , "
Control Cable Adjustment" .
OK or NG
OK >> GO TO 3.
NG >> Adjust control cable. Refer to AT- 4 0 9 , "
Control Cable
Adjustment" .
3. CHECK VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR) AND CHECK VEHICLE SPEED
SENSOR·MTR CIRCUIT
Check vehicle speed sensor·A/T (revolution sensor) and vehicle speed sensor·MTR circuit. Refer to AT- 3 3 2 ,
"VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR)" and AT- 3 3 9 , "DTC VEHICLE SPEED SENSOR
MTR" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace vehicle speed sensor·A/T (revolution sensor) and vehicle speed sensor·MTR
circuits.
4. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 4 0 4 , "
COMPONENTS" .
2. Check A/T fluid condition. Refer to AT- 2 5 6 , "
FLUID CONDITION
CHECK" .
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
SAT023JB
SAT171B

ALL MODE 4X4 SYSTEM
TF-13
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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

ALL MODE 4X4 SYSTEM
TF-15
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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 coolant temperature signal TR
Accelerator pedal position signal T R
Output shaft revolution signal R T
A/C compressor feedback signal TR
Vehicle speed signalTRR
RT
ABS warning lamp signal T R
4WD warning lamp signalTR
4WD mode indicator lamp signalTR
Parking brake switch signalRT
MI signal TR
Engine A/T integrated control signalTR
RT
A/T self-diagnosis signal R TSignals ECM TCMABS actuator
and electric unit
(control unit)4WD control
unitCombination
meter
PKIA6459E
Signals ECMESP/TCS/ABS
control unitSteering angle
sensor4WD control
unitCombination
meter
Stop lamp switch signal T R
Engine speed signal T R R R
Engine coolant temperature signal TR
Accelerator pedal position signal T R R
A/C switch signal*
1RT
A/C compressor feedback signal*
2TR

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 speed signalTRR
RT
ABS warning lamp signal T R
Brake warning lamp signal T R
SLIP indicator lamp signal T R
ESP OFF indicator lamp signal T R
4WD warning lamp signalTR
4WD mode indicator lamp signalTR
Parking brake switch signalRT
MI signal TR
Glow indicator lamp signal*
1TR
Steering angle sensor signal R TSignals ECMESP/TCS/ABS
control unitSteering angle
sensor4WD control
unitCombination
meter
PKIA6460E
Signals ECM TCMESP/TCS/
ABS control
unitSteering
angle sensor4WD control
unitCombination
meter
Stop lamp switch signalRT
TR
P·N range signal R T
A/T position indicator lamp signal T R R
O/D OFF indicator signal T R
Overdrive control switch signal R T
Closed throttle position signal T R
Wide open throttle position signal T R

ALL MODE 4X4 SYSTEM
TF-17
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Engine speed signal T R R R
Engine coolant temperature signal TR
Accelerator pedal position signal T R R
Output shaft revolution signal R T
A/C compressor feedback signal TR
Vehicle speed signalTRR
RT
ABS warning lamp signal T R
Brake warning lamp signal T R
SLIP indicator lamp signal T R
ESP OFF indicator lamp signal T R
4WD warning lamp signalTR
4WD mode indicator lamp signalTR
Parking brake switch signalRT
MI signal TR
Steering angle sensor signal R T
Engine and A/T integratedTR
RT
A/T self-diagnosis signal R TSignals ECM TCMESP/TCS/
ABS control
unitSteering
angle sensor4WD control
unitCombination
meter

TROUBLE DIAGNOSIS
TF-27
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Trouble Diagnosis Chart for SymptomsEDS001VJ
If 4WD warning lamp turns ON, perform self-diagnosis. Refer to TF-30, "SELF-DIAG RESULT MODE" .
NOTE:

Light tight-corner braking symptom may occur depending on driving conditions in AUTO mode. This is not malfunction.

Heavy tight-corner braking symptom occurs when vehicle is driven in the following conditions: LOCK mode, steering
wheel is turned fully to either sides, and accelerator pedal was depressed.Symptom Condition Check item Reference page
4WD indicator lamp and LOCK indicator
lamp do not turn ON for approx. 1 second
when the ignition switch is turned to ON.
(4WD indicator lamp and LOCK indicator
lamp check)Ignition switch: ONCAN communication line
TF-44
Power supply and ground for 4WD con-
trol unit
Unified meter control unit
4WD warning lamp does not turn ON when
the ignition switch is turned to ON.
(4WD warning lamp check)Ignition switch: ONCAN communication line
TF-45
Unified meter control unit
4WD warning lamp does not turn OFF sev-
eral seconds after engine started.Engine runningCAN communication line
TF-46
Power supply and ground for 4WD con-
trol unit
Unified meter control unit
4WD solenoid
4WD actuator relay (integrated in 4WD
control unit)
Wheel sensor
4WD mode cannot be switched after engine
is started.Engine running4WD mode switch
TF-47
CAN communication line
Unified meter control unit
Heavy tight-corner braking symptom occurs
when the vehicle is driven in AUTO mode
and the steering wheel is turned fully to
either side after the engine is started. (See
NOTE.)

While driving

AUTO mode

Steering wheel is
turned fully to either
sidesCAN communication line
TF-48
4WD mode switch
Accelerator pedal position signal
4WD solenoid
Mechanical malfunction of electric con-
trolled coupling (clutch sticking etc.)
Vehicle does not enter 4WD mode even
though 4WD warning lamp turned to OFF.Vehicle speed: 10 km/h
(6 MPH) or less4WD solenoid
TF-49
Mechanical malfunction of electric con-
trolled coupling (Mechanical engage-
ment of clutch is not possible.)
Vehicle speed: 10 km/h
(6 MPH) or moreOperating condition of parking brake
4WD solenoid
Mechanical malfunction of electric con-
trolled coupling (Mechanical engage-
ment of clutch is not possible.)
While driving, 4WD warning lamp flashes
rapidly. (When flashing in approx. 1 minute
and then turning OFF.)
Rapid flashing: 2 times/second

While driving

AUTO mode and
LOCK modeProtection function is activated due to
heavy load to electric controlled cou-
pling. (4WD system is not malfunction-
ing.)TF-50
While driving, 4WD warning lamp flashes
slowly. (When continuing to flash until turn-
ing ignition switch OFF)
Slow flashing: 1 time/2 seconds
While driving

Vehicle speed: 20 km/h
(12 MPH) or moreTire size is different between front and
rear of vehicle.TF-51