2003 NISSAN X-TRAIL engine

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

AT-6
TROUBLE DIAGNOSIS — INDEX

TROUBLE DIAGNOSIS — INDEXPFP:00000
Alphabetical & P No. Index for DTCECS003VK
ALPHABETICAL INDEX FOR DTC
NOTE:

Check if the vehicle is a model with Euro-OBD system or not by the “Type approval number” on
the identification plate. Refer to GI-44, "
IDENTIFICATION PLATE".

If DTC “U1000” is displayed with other DTC, first perform the trouble diagnosis for “DTC U1000
CAN COMMUNICATION LINE”. Refer to AT- 9 7 , "
DTC U1000 CAN COMMUNICATION LINE" .

*1: These numbers are prescribed by SAE J2012.Type approval number Model
Available With Euro-OBD system
Not available (blank) Without Euro-OBD system
Items
(CONSULT-II screen terms)DTC
Reference page
CONSULT-II
GST*1
A/T 1ST GR FNCTN P0731AT-125
A/T 2ND GR FNCTN P0732AT-130
A/T 3RD GR FNCTN P0733AT-135
A/T 4TH GR FNCTN P0734AT-140
ATF TEMP SEN/CIRC P0710AT-106
BATT/FLUID TEMP SEN —AT-184
CAN COMM CIRCUIT U1000AT- 9 7
CONTROL UNIT (RAM) —AT-198
CONTROL UNIT (ROM) —AT-198
CONT UNIT (EEP ROM) —AT-200
ENGINE SPEED SIG P0725AT- 11 9
INITIAL START — —
LINE PRESSURE S/V P0745AT-154
OVERRUN CLUTCH S/V P1760AT-178
PNP SW/CIRC P0705AT-100
SHIFT SOLENOID/V A P0750AT-161
SHIFT SOLENOID/V B P0755AT-167
T/C CLUTCH SOL/V P0740AT-148
THROTTLE POSI SEN P1705AT-173
VHCL SPEED SEN·A/T P0720AT- 11 2
VHCL SPEED SEN·MTR —AT-192

TROUBLE DIAGNOSIS — INDEX
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P NO. INDEX FOR DTC
NOTE:

Check if the vehicle is a model with Euro-OBD system or not by the “Type approval number” on
the identification plate. Refer to GI-44, "
IDENTIFICATION PLATE" .

If DTC “U1000” is displayed with other DTC, first perform the trouble diagnosis for “DTC U1000
CAN COMMUNICATION LINE”. Refer to AT- 9 7 , "
DTC U1000 CAN COMMUNICATION LINE" .

*1: These numbers are prescribed by SAE J2012.Type approval number Model
Available With Euro-OBD system
Not available (blank) Without Euro-OBD system
DTC
Items
(CONSULT-II screen terms)Reference page
CONSULT-II
GST*1
P0705 PNP SW/CIRCAT- 1 0 0
P0710 ATF TEMP SEN/CIRCAT- 1 0 6
P0720 VHCL SPEED SEN·A/TAT- 11 2
P0725 ENGINE SPEED SIGAT- 11 9
P0731 A/T 1ST GR FNCTNAT- 1 2 5
P0732 A/T 2ND GR FNCTNAT- 1 3 0
P0733 A/T 3RD GR FNCTNAT- 1 3 5
P0734 A/T 4TH GR FNCTNAT- 1 4 0
P0740 T/C CLUTCH SOL/VAT- 1 4 8
P0745 LINE PRESSURE S/VAT- 1 5 4
P0750 SHIFT SOLENOID/V AAT- 1 6 1
P0755 SHIFT SOLENOID/V BAT- 1 6 7
P1705 THROTTLE POSI SENAT- 1 7 3
P1760 OVERRUN CLUTCH S/VAT- 1 7 8
U1000 CAN COMM CIRCUITAT- 9 7
— BATT/FLUID TEMP SENAT- 1 8 4
— CONTROL UNIT (RAM)AT- 1 9 8
— CONTROL UNIT (ROM)AT- 1 9 8
— CONT UNIT (EEP ROM)AT- 2 0 0
— INITIAL START —
— VHCL SPEED SEN·MTRAT- 1 9 2

AT-8
PRECAUTIONS

PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
ECS004Q0
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for On Board Diagnostic (EURO-OBD) System of A/T and Engine —
Euro-OBD —
ECS004Q1
The ECM has an on board diagnostic system. It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:

Be sure to turn the ignition switch “OFF” and disconnect the negative battery terminal before any
repair or inspection work. The open/short circuit of related switches, sensors, solenoid valves,
etc. will cause the MIL to light up.

Be sure to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to light up due to an open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)

Be sure to route and secure the harnesses properly after work. Interference of the harness with a
bracket, etc. may cause the MIL to light up due to a short circuit.

Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to a malfunction of the EGR system or fuel injection system, etc.

Be sure to erase the unnecessary malfunction information (repairs completed) from the TCM and
ECM before returning the vehicle to the customer.
Precautions for Trouble DiagnosisECS004VN
CAN SYSTEM

Do not apply voltage of 7.0V or higher to the measurement terminals.

Use the tester with its open terminal voltage being 7.0V or less.
Precautions for Harness RepairECS004VO
CAN SYSTEM

Solder the repaired parts, and wrap with tape. [Frays of twisted
line must be within 110 mm (4.33 in)]
PKIA0306E

PRECAUTIONS
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Converter is contaminated with engine coolant containing antifreeze.

Internal failure of stator roller clutch.

Heavy clutch debris due to overheating (blue converter).

Steel particles or clutch lining material found in fluid filter or on magnet when no internal parts in unit are
worn or damaged — indicates that lining material came from converter.
The torque converter should not be replaced if:

The fluid has an odor, is discolored, and there is no evidence of metal or clutch facing particles.

The threads in one or more of the converter bolt holes are damaged.

Transaxle failure did not display evidence of damaged or worn internal parts, steel particles or clutch plate
lining material in unit and inside the fluid filter.

Vehicle has been exposed to high mileage (only). The exception may be where the torque converter
clutch dampener plate lining has seen excess wear by vehicles operated in heavy and/or constant traffic,
such as taxi, delivery or police use.
EURO-OBD SELF-DIAGNOSIS — EURO-OBD —

A/T self-diagnosis is performed by the TCM in combination with the ECM. The results can be read through
the blinking pattern of the O/D OFF indicator lamp or the malfunction indicator lamp (MIL). Refer to the
table on AT- 4 5 , "
SELF-DIAGNOSTIC RESULT TEST MODE" for the indicator used to display each self-
diagnostic result.

The self-diagnostic results indicated by the MIL are automatically stored in both the ECM and TCM mem-
ories.
Always perform the procedure “HOW TO ERASE DTC” on AT- 4 2 , "
HOW TO ERASE DTC" to com-
plete the repair and avoid unnecessary blinking of the MIL.

The following self-diagnostic items can be detected using ECM self-diagnostic results mode* only when
the O/D OFF indicator lamp does not indicate any malfunctions.
–PNP switch
–A/T 1st, 2nd, 3rd, or 4th gear function
*: For details of EURO-OBD, refer to EC-51, "
ON BOARD DIAGNOSTIC (OBD) SYSTEM" .

Certain systems and components, especially those related to EURO-OBD, may use a new style
slide-locking type harness connector.
For description and how to disconnect, refer to PG-70, "
HARNESS CONNECTOR" .
Wiring Diagrams and Trouble DiagnosisECS004Q4
When you read wiring diagrams, refer to the following:

GI-14, "How to Read Wiring Diagrams"

PG-2, "POWER SUPPLY ROUTING"
When you perform trouble diagnosis, refer to the following:

GI-10, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES"

GI-23, "How to Perform Efficient Diagnosis for an Electrical Incident"

AT-16
A/T FLUID

A/T FLUIDPFP:KLE40
Checking A/T FluidECS004Q7
1. Warm up engine.
2. Check for A/T fluid leakage.
3. Before driving, A/T fluid level can be checked at A/T fluid tem-
peratures of 30 to 50°C (86 to 122°F) using “COLD” range on A/
T fluid level gauge.
a. Park vehicle on level surface and set parking brake.
b. Start engine and move selector lever through each gear posi-
tion. Leave selector lever in “P” position.
c. Check A/T fluid level with engine idling.
d. Remove A/T fluid level gauge and note reading. If level is at low
side of either range, and A/T fluid to the A/T fluid charging pipe.
CAUTION:
When wiping away the A/T fluid level gauge, always use
lint-free paper, not a cloth one.
e. Re-insert A/T fluid level gauge into A/T fluid charging pipe as far
as it will go.
CAUTION:
Firmly fix the A/T fluid level gauge to the A/T fluid charging
pipe using a stopper attached.
f. Remove A/T fluid level gauge and note reading. If reading is at
low side of range, add A/T fluid to the A/T fluid charging pipe.
CAUTION:
Do not overfill.
4. Drive vehicle for approximately 5 minutes in urban areas.
5. Recheck A/T fluid level at A/T fluid temperatures of 50 to 80°C (122 to 176°F) using “HOT” range on A/T
fluid level gauge.
CAUTION:

When wiping away the A/T fluid level gauge, always use lint-free paper, not a cloth one.

Firmly fix the A/T fluid level gauge to the A/T fluid charging pipe using a stopper attached.
SMA146B
SMA827CA
SMA051D

A/T FLUID
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6. Check A/T fluid condition.

If A/T fluid is very dark or smells burned, checking operation
of A/T. Flush cooling system after repair of A/T.

If A/T fluid contains frictional material (clutches, bands, etc.),
replace radiator and flush cooler line using cleaning solvent
and compressed air after repair of A/T. Refer to CO-12,
"RADIATOR" , CO-14, "RADIATOR (ALUMINUM TYPE)" .
7. Install the removed A/T fluid level gauge in the A/T fluid charging
pipe.
CAUTION:
Firmly fix the A/T fluid level gauge to the A/T fluid charging
pipe using a stopper attached.
Changing A/T FluidECS004Q8
1. Warm up A/T fluid.
2. Stop engine.
3. Drain A/T fluid from drain plug and refill with new A/T fluid. Always refill same volume with drained fluid.
Refer to MA-17, "
RECOMMENDED FLUIDS AND LUBRICANTS" .
CAUTION:
Do not reuse drain plug gasket.
4. Run engine at idle speed for five minutes.
5. Check A/T fluid level and condition. Refer to AT- 1 6 , "
Checking
A/T Fluid" . If A/T fluid is still dirty, repeat steps 2 through 5.
SAT638A
Fluid capacity (With torque converter):
Approx. 8.5 (7-1/2 lmp qt)
Drain plug:
: 34 N·m (3.5 kg-m, 25 ft-lb)
SMA027D

AT-22
OVERALL SYSTEM

Shift MechanismECS004QD
CONSTRUCTION
FUNCTION OF CLUTCH AND BRAKE
1. Torque converter 2. Oil pump 3. Input shaft
4. Brake band 5. Reverse clutch 6. High clutch
7. Front sun gear 8. Front pinion gear 9. Front internal gear
10. Front planetary carrier 11. Rear sun gear 12. Rear pinion gear
13. Rear internal gear 14. Rear planetary carrier 15. Forward clutch
16. Forward one-way clutch 17. Overrun clutch 18. Low one-way clutch
19. Low & reverse brake 20. Parking pawl 21. Parking gear
22. Output shaft 23. Idle gear 24. Output gear
SAT998I
Clutch and brake components Abbr. Function
5 Reverse clutch R/C To transmit input power to front sun gear 7 .
6 High clutch H/C To transmit input power to front planetary carrier 10 .
15 Forward clutch F/C To connect front planetary carrier 10 with forward one-way clutch 16 .
17 Overrun clutch O/C To connect front planetary carrier 10 with rear internal gear 13 .
4 Brake band B/B To lock front sun gear 7 .
16 Forward one-way clutch F/O.C When forward clutch 15 is engaged, to stop rear internal gear 13 from rotating in
opposite direction against engine revolution.
18 Low one-way clutch L/O.C To stop front planetary carrier 10 from rotating in opposite direction against
engine revolution.
19 Low & reverse brake L & R/B To lock front planetary carrier 10 .