2003 NISSAN X-TRAIL brake sensor

AT-1
AUTOMATIC TRANSAXLE
C TRANSMISSION/TRANSAXLE
CONTENTS
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AUTOMATIC TRANSAXLE
TROUBLE DIAGNOSIS — INDEX ............................. 6
Alphabetical & P No. Index for DTC ......................... 6
PRECAUTIONS .......................................................... 8
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 8
Precautions for On Board Diagnostic (EURO-OBD)
System of A/T and Engine — Euro-OBD — ............. 8
Precautions for Trouble Diagnosis ........................... 8
Precautions for Harness Repair ............................... 8
Precautions .............................................................. 9
Service Notice or Precautions ................................ 10
Wiring Diagrams and Trouble Diagnosis ................. 11
PREPARATION ......................................................... 12
Special Service Tools ............................................. 12
Commercial Service Tools ...................................... 15
A/T FLUID ................................................................. 16
Checking A/T Fluid ................................................. 16
Changing A/T Fluid ................................................ 17
OVERALL SYSTEM ................................................. 18
Cross-Sectional View ............................................. 18
Hydraulic Control Circuit ........................................ 19
A/T Electrical Parts Location .................................. 20
Circuit Diagram ...................................................... 21
Shift Mechanism ..................................................... 22
TCM Function ......................................................... 31
CAN Communication .............................................. 32
Input/Output Signal of TCM .................................... 34
Line Pressure Control ............................................ 34
Shift Control ........................................................... 35
Lock-up Control ...................................................... 36
Engine Brake Control (Overrun Clutch Control) ..... 37
Control Valve .......................................................... 39
EURO-OBD
ON BOARD DIAGNOSTIC SYSTEM DESCRIP-
TION .......................................................................... 40
Introduction ............................................................ 40
EURO-OBD Function for A/T System .................... 40One or Two Trip Detection Logic of EURO-OBD .... 40
EURO-OBD Diagnostic Trouble Code (DTC) ......... 40
Malfunction Indicator lamp (MIL) ............................ 44
CONSULT-II ............................................................ 44
Diagnostic Procedure Without CONSULT-II ........... 52
TROUBLE DIAGNOSIS — INTRODUCTION ........... 57
Introduction ............................................................. 57
Work Flow ............................................................... 61
TROUBLE DIAGNOSIS — BASIC INSPECTION .... 64
A/T Fluid Check ...................................................... 64
Stall Test ................................................................. 65
Line Pressure Test .................................................. 68
Road Test ............................................................... 70
TROUBLE DIAGNOSIS — GENERAL DESCRIP-
TION .......................................................................... 85
Symptom Chart ....................................................... 85
TCM Terminals and Reference Value ..................... 94
DTC U1000 CAN COMMUNICATION LINE .............. 97
Description .............................................................. 97
On Board Diagnosis Logic ...................................... 97
Possible Cause ....................................................... 97
DTC Confirmation Procedure ................................. 97
Wiring Diagram — AT — CAN ................................ 98
Diagnostic Procedure ............................................. 99
DTC P0705 PARK/NEUTRAL POSITION (PNP)
SWITCH ..................................................................100
Description ............................................................100
On Board Diagnosis Logic ....................................100
Possible Cause .....................................................100
DTC Confirmation Procedure ...............................100
Wiring Diagram — AT — PNP/SW .......................102
Diagnostic Procedure ...........................................103
DTC P0710 A/T FLUID TEMPERATURE SENSOR
CIRCUIT ..................................................................106
Description ............................................................106
On Board Diagnosis Logic ....................................106
Possible Cause .....................................................106
DTC Confirmation Procedure ...............................106
Wiring Diagram — AT — FTS ..............................108

AT-3
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DTC CONTROL UNIT(EEPROM) ........................... 200
Description ........................................................... 200
On Board Diagnosis Logic ................................... 200
Possible Cause .................................................... 200
DTC Confirmation Procedure ............................... 200
Diagnostic Procedure ........................................... 201
TROUBLE DIAGNOSES FOR SYMPTOMS .......... 202
Wiring Diagram — AT — NONDTC ...................... 202
O/D OFF Indicator Lamp Does Not Come On ..... 204
Engine Cannot Be Started In “P” and “N” Position . 206
In “P” Position, Vehicle Moves Forward Or Back-
ward When Pushed .............................................. 207
In “N” Position, Vehicle Moves ............................. 208
Large Shock. “N” → “R” Position .......................... 209
Vehicle Does Not Creep Backward In “R” Position . 210
Vehicle Does Not Creep Forward In “D”, “2” Or “1”
Position ................................................................ 212
Vehicle Cannot Be Started From D
1 ..................... 214
A/T Does Not Shift: D
1 → D2 Or Does Not Kickdown:
D
4 → D2 ............................................................... 217
A/T Does Not Shift: D
2 → D3 ............................... 220
A/T Does Not Shift: D
3 → D4 ............................... 222
A/T Does Not Perform Lock-up ............................ 224
A/T Does Not Hold Lock-up Condition ................. 225
Lock-up Is Not Released ...................................... 227
Engine Speed Does Not Return To Idle (Light Brak-
ing D
4 → D3 ) ....................................................... 228
Vehicle Does Not Start From D
1 ........................... 230
A/T Does Not Shift: D
4 → D3 , When Overdrive Con-
trol Switch “ON” → “OFF” ..................................... 231
A/T Does Not Shift: D
3 → 22 , When Selector Lever
“D” → “2” Position ................................................ 232
A/T Does Not Shift: 2
2 → 11 , When Selector Lever
“2” → “1” Position ................................................. 233
Vehicle Does Not Decelerate By Engine Brake ... 235
TCM Self-diagnosis Does Not Activate ................ 237
EXC.F/EURO-OBD
ON BOARD DIAGNOSTIC SYSTEM DESCRIP-
TION ........................................................................ 242
CONSULT-II ......................................................... 242
Diagnostic Procedure Without CONSULT-II ......... 246
TROUBLE DIAGNOSIS — INTRODUCTION ......... 251
Introduction .......................................................... 251
Work Flow ............................................................ 255
TROUBLE DIAGNOSIS — BASIC INSPECTION .. 256
A/T Fluid Check .................................................... 256
Stall Test ............................................................... 257
Line Pressure Test ............................................... 260
Road Test ............................................................. 262
TROUBLE DIAGNOSIS — GENERAL DESCRIP-
TION ........................................................................ 277
Symptom Chart .................................................... 277
TCM Terminals and Reference Value ................... 286
TROUBLE DIAGNOSES FOR SYMPTOMS .......... 289
Wiring Diagram — AT — NONDTC ...................... 289
O/D OFF Indicator Lamp Does Not Come On ..... 291
Engine Cannot Be Started In “P” and “N” Position . 293In “P” Position, Vehicle Moves Forward Or Back-
ward When Pushed ..............................................294
In “N” Position, Vehicle Moves ..............................295
Large Shock. “N” → “R” Position ..........................296
Vehicle Does Not Creep Backward In “R” Position .297
Vehicle Does Not Creep Forward In “D”, “2” Or “1”
Position .................................................................299
Vehicle Cannot Be Started From D
1 .....................301
A/T Does Not Shift: D
1 → D2 Or Does Not Kickdown:
D
4 → D2 ................................................................304
A/T Does Not Shift: D
2 → D3 ................................307
A/T Does Not Shift: D
3 → D4 ................................309
A/T Does Not Perform Lock-up ............................311
A/T Does Not Hold Lock-up Condition ..................312
Lock-up Is Not Released ......................................314
Engine Speed Does Not Return To Idle (Light Brak-
ing D
4 → D3 ) ........................................................315
Vehicle Does Not Start From D
1 ...........................317
A/T Does Not Shift: D
4 → D3 , When Overdrive Con-
trol Switch “ON” → “OFF” .....................................318
A/T Does Not Shift: D
3 → 22 , When Selector Lever
“D” → “2” Position .................................................319
A/T Does Not Shift: 2
2 → 11 , When Selector Lever
“2” → “1” Position .................................................320
Vehicle Does Not Decelerate By Engine Brake ....322
TCM Self-diagnosis Does Not Activate ................324
ALL
CAN COMMUNICATION LINE ...............................329
Description ............................................................329
On Board Diagnosis Logic ....................................329
Possible Cause .....................................................329
DTC Confirmation Procedure ...............................329
Wiring Diagram — AT — CAN ..............................330
Diagnostic Procedure ...........................................331
VEHICLE SPEED SENSOR·A/T (REVOLUTION
SENSOR) ................................................................332
Description ............................................................332
CONSULT-II Reference Value ..............................332
On Board Diagnosis Logic ....................................332
Possible Cause .....................................................332
DTC Confirmation Procedure ...............................332
Wiring Diagram — AT — VSSA/T ........................334
Diagnostic Procedure ...........................................335
DTC VEHICLE SPEED SENSOR MTR ..................339
Description ............................................................339
CONSULT-II Reference Value ..............................339
On Board Diagnosis Logic ....................................339
Possible Cause .....................................................339
DTC Confirmation Procedure ...............................339
Wiring Diagram — AT — VSSMTR ......................341
Diagnostic Procedure ...........................................343
ACCELE RATOR PEDAL POSITION (APP) SEN-
SOR .........................................................................345
Description ............................................................345
On Board Diagnosis Logic ....................................345
Possible Cause .....................................................345
DTC Confirmation Procedure ...............................345

AT-4 Wiring Diagram — AT — TPS ..............................347
Diagnostic Procedure ...........................................348
SHIFT SOLENOID VALVE A ..................................350
Description ............................................................350
CONSULT-II Reference Value ..............................350
On Board Diagnosis Logic ....................................350
Possible Cause .....................................................350
DTC Confirmation Procedure ...............................350
Wiring Diagram — AT — SSV/A ...........................352
Diagnostic Procedure ...........................................353
Component Inspection ..........................................355
SHIFT SOLENOID VALVE B ..................................356
Description ............................................................356
CONSULT-II Reference Value ..............................356
On Board Diagnosis Logic ....................................356
DTC Confirmation Procedure ...............................356
Wiring Diagram — AT — SSV/B ...........................358
Diagnostic Procedure ...........................................359
Component Inspection ..........................................361
OVERRUN CLUTCH SOLENOID VALVE ...............362
Description ............................................................362
CONSULT-II Reference Value ..............................362
On Board Diagnosis Logic ....................................362
Possible Cause .....................................................362
DTC Confirmation Procedure ...............................362
Wiring Diagram — AT — OVRCSV ......................364
Diagnostic Procedure ...........................................365
Component Inspection ..........................................367
TORQUE CONVERTER CLUTCH SOLENOID
VALVE .....................................................................368
Description ............................................................368
CONSULT-II Reference Value ..............................368
On Board Diagnosis Logic ....................................368
Possible Cause .....................................................368
DTC Confirmation Procedure ...............................368
Wiring Diagram — AT — TCV ..............................370
Diagnostic Procedure ...........................................371
Component Inspection ..........................................373
BATT/FLUID TEMP SEN (A/T FLUID TEMP SEN-
SOR CIRCUIT AND TCM POWER SOURCE) ........374
Description ............................................................374
CONSULT-II Reference Value ..............................374
On Board Diagnosis Logic ....................................374
Possible Cause .....................................................374
DTC Confirmation Procedure ...............................375
Wiring Diagram — AT — BA/FTS .........................376
Diagnostic Procedure ...........................................377
Component Inspection ..........................................381
ENGINE SPEED SIGNAL .......................................382
Description ............................................................382
CONSULT-II Reference Value ..............................382
On Board Diagnosis Logic ....................................382
DTC Confirmation Procedure ...............................382
Wiring Diagram — AT — ENGSS .........................383
Diagnostic Procedure ...........................................384
LINE PRESSURE SOLENOID VALVE ...................387
Description ............................................................387
CONSULT-II Reference Value ..............................387
On Board Diagnosis Logic ....................................387Possible Cause .....................................................387
DTC Confirmation Procedure ................................387
Wiring Diagram — AT — LPSV ............................389
Diagnostic Procedure ............................................390
Component Inspection ..........................................393
MAIN POWER SUPPLY AND GROUND CIRCUIT .394
Description ............................................................394
On Board Diagnosis Logic ....................................394
Possible Cause .....................................................394
DTC Confirmation Procedure ................................394
Wiring Diagram — AT — MAIN .............................395
Diagnostic Procedure ............................................396
A/T SHIFT LOCK SYSTEM .....................................398
Description ............................................................398
Shift Lock System Electrical Parts Location ..........398
Wiring Diagram — SHIFT .....................................399
Diagnostic Procedure ............................................400
KEY INTERLOCK CABLE ......................................402
Components ..........................................................402
Removal ................................................................402
Installation .............................................................403
ON-VEHICLE SERVICE ..........................................404
Control Valve Assembly and Accumulators ..........404
Park/Neutral Position (PNP) Switch ......................408
Differential Side Oil Seal Replacement .................410
Revolution Sensor Replacement ..........................412
REMOVAL AND INSTALLATION ............................413
Removal ................................................................413
Installation .............................................................415
OVERHAUL .............................................................416
Components ..........................................................416
Oil Channel ...........................................................422
Locations of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings ..........................423
DISASSEMBLY .......................................................424
Disassembly ..........................................................424
REPAIR FOR COMPONENT PARTS ......................440
Manual Shaft .........................................................440
Oil Pump ...............................................................443
Control Valve Assembly ........................................448
Control Valve Upper Body .....................................457
Control Valve Lower Body .....................................461
Reverse Clutch .....................................................464
High Clutch ...........................................................469
Forward and Overrun Clutches .............................475
Low & Reverse Brake ...........................................483
Rear Internal Gear, Forward Clutch Hub and Over-
run Clutch Hub ......................................................487
Output Shaft, Idler Gear, Reduction Pinion Gear and
Bearing Retainer ...................................................491
Band Servo Piston Assembly ................................497
Final Drive .............................................................503
ASSEMBLY .............................................................507
Assembly (1) .........................................................507
Adjustment (1) .......................................................508
Assembly (2) .........................................................513
Adjustment (2) .......................................................520
Assembly (3) .........................................................523

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SERVICE DATA AND SPECIFICATIONS (SDS) .... 530
General Specifications ......................................... 530
Shift Schedule ...................................................... 530
Stall Revolution .................................................... 531
Line Pressure ....................................................... 531
Control Valves ...................................................... 531
Accumulator ......................................................... 532
Clutch and Brakes ................................................ 533
Final Drive ............................................................ 535
Planetary Carrier and Oil Pump ........................... 536
Input Shaft ............................................................ 537
Reduction Pinion Gear ......................................... 537Band Servo ...........................................................538
Output Shaft .........................................................538
Bearing Retainer ...................................................538
Total End Play .......................................................538
Reverse Clutch End Play ......................................539
Removal and Installation ......................................539
Shift Solenoid Valves ............................................539
Solenoid Valves ....................................................539
A/T Fluid Temperature Sensor ..............................540
Revolution Sensor ................................................540
Dropping Resistor .................................................540

OVERALL SYSTEM
AT-31
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TCM FunctionECS004QE
The function of the TCM is to:

Receive input signals sent from various switches and sensors.

Determine required line pressure, shifting point, lock-up operation, and engine brake operation.

Send required output signals to the respective solenoids.
CONTROL SYSTEM OUTLINE
The automatic transaxle senses vehicle operating conditions through various switches and sensors. It always
controls the optimum shift position and reduces shifting and lock-up shocks.
CONTROL SYSTEM
SWITCHES & SENSORS

TCM

ACTUATORS
PNP switch
Accelerator pedal position (APP)
sensor
Closed throttle position signal
Wide open throttle position signal
Engine speed signal
A/T fluid temperature sensor
Revolution sensor
Vehicle speed sensor
Overdrive control switch signal
Stop lamp switch signalShift control
Line pressure control
Lock-up control
Overrun clutch control
Timing control
Fail-safe control
Self-diagnosis
CONSULT-II communication line
control
CAN systemShift solenoid valve A
Shift solenoid valve B
Overrun clutch solenoid valve
Torque converter clutch solenoid
valve
Line pressure solenoid valve
O/D OFF indicator lamp
SCIA4505E

AT-34
OVERALL SYSTEM

Input/Output Signal of TCMECS00CTC
*1: Spare for vehicle speed sensor·A/T (revolution sensor)
*2: Spare for accelerator pedal position signal
*3: If these input and output signals are different, the TCM triggers the fail-safe function.
*4: Used as a condition for starting self-diagnostics; if self-diagnostics are not started, it is judged that there is some kind of error.
*5: Input by CAN communications.
*6: Output by CAN communications.
Line Pressure ControlECS004QF

TCM has various line pressure control characteristics to match the driving conditions.

An ON-OFF duty signal is sent to the line pressure solenoid valve based on TCM characteristics.

Hydraulic pressure on the clutch and brake is electronically controlled through the line pressure solenoid
valve to accommodate engine torque. This results in smooth shift operation.
NORMAL CONTROL
The line pressure to throttle opening characteristics is set for suitable
clutch operation.
Control itemLine
pressure
controlVehicle
speed
controlShift
controlLock-up
controlEngine
brake
controlFail-safe
function
(*3)Self-diag-
nostics
function
InputAccelerator pedal position signalXXXXXXX
Vehicle speed sensor A/T
(Revolution sensor)XXXX XX
Vehicle speed sensor MTR
(*1)XXXX X
Closed throttle position signal
(*5)(*2) X (*2) X X (*4) X
Wide open throttle position signal
(*5)(*2) X (*2) X (*4) X
Engine speed signal X X
PNP switch XXXXXX(*4) X
Stop lamp switch signal
(*5)XXX(*4) X
A/T fluid temperature sensors X X X X X
TCM power supply voltage signal XX
Out-
putShift solenoid valve A/B X X X
Line pressure solenoid X X X
Torque converter clutch solenoid
valveXXX
Overrun clutch solenoid valve X X X X
O/D OFF indicator lamp
(*6)X
SAT003J

OVERALL SYSTEM
AT-35
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BACK-UP CONTROL (ENGINE BRAKE)
If the selector lever is shifted to “2” position while driving in D4 (OD)
or D
3 , great driving force is applied to the clutch inside the transmis-
sion. Clutch operating pressure (line pressure) must be increased to
deal with this driving force.
DURING SHIFT CHANGE
The line pressure is temporarily reduced corresponding to a change
in engine torque when shifting gears (that is, when the shift solenoid
valve is switched for clutch operation) to reduce shifting shock.
AT LOW FLUID TEMPERATURE

Fluid 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.

The 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.

Line 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 ControlECS00CTD
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 the ECM (accelerator
pedal position sensor). This results in improved acceleration performance and fuel economy.
SAT004J
SAT005J
SAT006J
SAT007J

AT-46
[EURO-OBD]
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

*1: These malfunctions cannot be displayed by MIL if another malfunction is assigned to lamp MIL.
DATA MONITOR MODE (A/T)
X: Standard, —: Not applicable, : Option CONT UNIT(EEP ROM)

TCM memory (EEP ROM) is malfunctioning. —
PNP SW/CIRC

TCM does not receive the correct voltage signal (based on the gear
position) from the switch.P0705
INITIAL START

This is not a malfunction message (Whenever shutting off a power sup-
ply to the TCM, this message appears on the screen).—
No failure
(NO SELF DIAGNOSTIC FAILURE
INDICATED FURTHER TESTING
MAY BE REQUIRED)

No failure has been detected. — Items (CONSULT-II screen terms) Malfunction is detected when... EURO-OBD (DTC)
Monitor item (Unit)SELECT MONITOR ITEM
Remarks
TCM INPUT
SIGNALSMAIN SIG-
NALSSELEC-
TION FROM
MENU
VHCL/S SE·A/T (km/h) X — Revolution sensor
VHCL/S SE·MTR (km/h) X —Vehicle speed display may not be accu-
rate under approx. 10 km/h (6 mph). It
may not indicate 0 km/h (0 mph) when
vehicle is stationary.
THRTL POS SEN (V) X —
FLUID TEMP SE (V) X —
BATTERY VOLT (V) X —
ENGINE SPEED (rpm) X X
TURBINE REV (rpm) X —
OVERDRIVE SW (ON/OFF) X —
PN POSI SW (ON/OFF) X —
R POSITION SW (ON/OFF) X —
D POSITION SW (ON/OFF) X —
2 POSITION SW (ON/OFF) X —
1 POSITION SW (ON/OFF) X —
ASCD·CRUISE (ON/OFF) X —
Signal input with CAN communication.
ACC OD CUT (ON/OFF) X —
KICKDOWN SW (ON/OFF) X —
Not mounted but displayed.
POWERSHIFT SW (ON/OFF) X —
CLOSED THL/SW (ON/OFF) X —
Signal input with CAN communication.
W/O THRL/P-SW (ON/OFF) X —
*SHIFT S/V A (ON/OFF) — —
Displays status of check signal (reinput
signal) for TCM control signal output.
Remains unchanged when solenoid
valves are open or shorted. *SHIFT S/V B (ON/OFF) — —
*OVERRUN/C S/V (ON/OFF) — —
HOLD SW (ON/OFF) X — Not mounted but displayed.
BRAKE SW (ON/OFF) X — Stop lamp switch