2003 NISSAN X-TRAIL transmission

OVERALL SYSTEM
AT-31
D
E
F
G
H
I
J
K
L
MA
B
AT
Control of Shift Valves A and B
Pilot pressure generated by the operation of shift solenoid valves A and B is applied to the end face of shift
valves A and B.
The drawing above shows the operation of shift valve B. When the shift solenoid valve is “ON”, pilot pressure
applied to the end face of the shift valve overcomes spring force, moving the valve upward.
LOCK-UP CONTROL
The torque converter clutch piston in the torque converter is locked to eliminate torque converter slip to
increase power transmission efficiency. The solenoid valve is controlled by an ON-OFF duty signal sent from
the TCM. The signal is converted to an oil pressure signal which controls the torque converter clutch piston.
Conditions for Lock-up Operation
When vehicle is driven in 4th gear position, vehicle speed and throttle opening are detected. If the detected
values fall within the lock-up zone memorized in the TCM, lock-up is performed.
Torque Converter Clutch Solenoid Valve Control
The torque converter clutch solenoid valve is controlled by the TCM.
The plunger closes the drain circuit during the “OFF” period, and
opens the circuit during the “ON” period. If the percentage of OFF-
time increases in one cycle, the pilot pressure drain time is reduced
and pilot pressure remains high.
SAT009J
Overdrive control switch ON OFF
Selector lever “D” position
Gear position D
4D3
Vehicle speed sensor More than set value
Throttle position sensor Less than set opening
Closed throttle position switch OFF
A/T fluid temperature sensor More than 40°C(104°F)
SAT010J

AT-64
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
TROUBLE DIAGNOSIS — BASIC INSPECTION
PFP:00000
A/T Fluid CheckECS0 04 QQ
FLUID LEAKAGE CHECK
1. Clean area suspected of leaking. — for example, mating surface
of converter housing and transmission case.
2. Start engine, apply foot brake, place selector lever in “D” posi-
tion and wait a few minutes.
3. Stop engine.
4. Check for fresh leakage.
FLUID CONDITION CHECK
FLUID LEVEL CHECK
Refer to “Checking A/T Fluid”,AT-13, "A/T FLUID".
SAT767B
SAT288G
Fluid color Suspected problem
Dark or black with burned odor Wear of frictional material
Milky pink Water contamination — Road water
entering through filler tube or breather
Varnished fluid, light to dark brown and
tackyOxidation — Over or under filling, —
Overheating
SAT638A

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
AT-113
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
Vehicle will not run in any position.ON vehicle1. Fluid levelAT-64,
"FLUID
LEVEL
CHECK"
¬
2. Control cable adjustmentAT-456,
"Control
Cable
Adjustment"
¬
3. Line pressure testAT-68, "
Line
Pressure
Te s t"
¬
4. Line pressure solenoid valveAT-436,
"LINE
PRES-
SURE
SOLENOID
VA LV E"
AT-186,
"DTC P0745
LINE PRES-
SURE
SOLENOID
VA LV E"
OFF vehicle5. Oil pumpAT-485, "
Oil
Pump"¬
6. High clutchAT-507,
"High
Clutch"
¬
7. Brake bandAT-530,
"Band
Servo Pis-
ton Assem-
bly"
¬
8. Low & reverse brakeAT-518,
"Low&
Reverse
Brake"
¬
9. Torque converterAT-465,
"Locations
of Adjusting
Shims, Nee-
dle Bear-
ings, Thrust
Washers
and Snap
Rings"
¬
10. Parking componentsAT-461,
"Compo-
nents"
¬
Transmission noise in “D”, “2”, “1”
and “R” positions.ON vehicle 1. Fluid levelAT-64,
"FLUID
LEVEL
CHECK"
¬
OFF vehicle 2. Torque converterAT-465,
"Locations
of Adjusting
Shims, Nee-
dle Bear-
ings, Thrust
Washers
and Snap
Rings"
¬ Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
AT-117
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
ATLarge shock changing from “12”to
“1
1” in “1” position.ON vehicle 1. Control valve assemblyAT-454,
"Control
Va lv e
Assembly
and Accu-
mulators"
¬
OFF vehicle 2. Low & reverse brakeAT-518,
"Low&
Reverse
Brake"
¬
Transmission overheats. ON vehicle1. Fluid levelAT-64,
"FLUID
LEVEL
CHECK"
¬
2. Engine idling rpm"EC-XX",
“Idle Speed
and Ignition
Timin g”¬
3. Throttle position sensor (Accelerator
pedal position (App) sensor) AdjustmentEC-154, "
DTC P0121 APP
SENSOR"
4. Line pressure testAT-68, "
Line
Pressure
Te s t"
¬
5. Line pressure solenoid valveAT-436,
"LINE
PRES-
SURE
SOLENOID
VA LV E"
AT-186,
"DTC P0745
LINE PRES-
SURE
SOLENOID
VA LV E"
6. Control valve assemblyAT-454,
"Control
Va lv e
Assembly
and Accu-
mulators"
¬ Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD

AT-118
[EURO-OBD]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Transmission overheats. OFF vehicle7. Oil pumpAT- 4 8 5 , "
Oil
Pump"¬
8. Reverse clutchAT- 5 0 4 ,
"Reverse
Clutch"
¬
9. High clutchAT- 5 0 7 ,
"High
Clutch"
¬
10. Brake bandAT- 5 3 0 ,
"Band
Servo Pis-
ton Assem-
bly"
¬
11. Forward clutchAT- 5 1 2 ,
"Forward
and Overrun
Clutches"
¬
12. Overrun clutchAT- 5 1 2 ,
"Forward
and Overrun
Clutches"
¬
13. Low & reverse brakeAT- 5 1 8 ,
"Low&
Reverse
Brake"
¬
14. Torque converterAT- 4 6 5 ,
"Locations
of Adjusting
Shims, Nee-
dle Bear-
ings, Thrust
Washers
and Snap
Rings"
¬ Symptom Condition Diagnostic ItemReference Page
Except for
Euro-OBDEURO-OBD

CAN COMMUNICATION
AT-129
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
CAN COMMUNICATIONPFP:23710
System DescriptionECS004VP
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.
FOR A/T MODELS
System diagram
Input/output signal chart
T: Transmit R: Receive
SKIA0884E
Signals ECM TCM
Engine speed signal T R
Engine coolant temperature signal T R
Accelerator pedal position signal T R
A/T self-diagnosis signal R T

AT-130
[EURO-OBD]
DTC P0705 PARK/NEUTRAL POSITION (PNP) SWITCH
DTC P0705 PARK/NEUTRAL POSITION (PNP) SWITCH
PFP:32006
DescriptionECS004QW
lThe PNP switch assembly includes a transmission range switch.
lThe transmission range switch detects the selector lever posi-
tion and sends a signal to the TCM.
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
ON BOARD DIAGNOSIS LOGIC
SCIA0752E
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
26 BR/YPNP switch “1”
position
andWhen setting selector lever to “1”
position.Battery voltage
When setting selector lever to other
positions.0V
27 LPNP switch “2”
positionWhen setting selector lever to “2”
position.Battery voltage
When setting selector lever to other
positions.0V
34 W/GPNP switch “D”
positionWhen setting selector lever to “D”
position.Battery voltage
When setting selector lever to other
positions.0V
35 L/WPNP switch “R”
positionWhen setting selector lever to “R”
position.Battery voltage
When setting selector lever to other
positions.0V
36 GPNP switch “N” or
“P” positionWhen setting selector lever to “N” or
“P” position.Battery voltage
When setting selector lever to other
positions.0V
Diagnostic trouble code Malfunction is detected when ... Check items (Possible cause)
:PNPSW/CIRC
TCM does not receive the correct voltage
signal from the switch based on the gear
position.
lHarness or connectors
(The PNP switch circuit is open or
shorted.)
lPNP switch : P0705

DTC P0731 A/T 1ST GEAR FUNCTION
AT-153
[EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
6. Stop vehicle.
7. Follow the instruction displayed. (Check for normal shifting referring to the table below.)
8. Make sure that “OK” is displayed. (If “NG” is displayed, refer to “DIAGNOSTIC PROCEDURE”.)
Refer to “DIAGNOSTIC PROCEDURE”,AT-155, "
Diagnostic Procedure".
Refer to shift schedule,AT-563, "
Shift Schedule".
With GST
Follow the procedure “With CONSULT-II”.
Vehicle conditionGear on actual transmission shift pattern when
screen is changed to 1®2®3®4
No malfunction exists 1®2®3®4
Malfunction for P0731
exists.2®2®3®3
4®3®3®4