2005 NISSAN X-TRAIL oil pressure

LINE PRESSURE SOLENOID VALVE
AT-387
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LINE PRESSURE SOLENOID VALVEPFP:31940
DescriptionECS004UF
The line pressure solenoid valve regulates the oil pump discharge
pressure to suit the driving condition in response to a signal sent
from the TCM.
The line pressure duty cycle value is not consistent when the
closed throttle position switch is ON. To confirm the line pres-
sure duty cycle at low pressure, the accelerator (throttle)
should be open until the closed throttle position switch is OFF.
CONSULT-II Reference ValueECS00CT5
Remarks: Specification data are reference values.
NOTE:
The line pressure duty cycle value is not consistent when the closed throttle position switch is “ON”. To confirm the line pressure duty
cycle at low pressure, the accelerator (throttle) should be open until the closed throttle position switch is “OFF”.
On Board Diagnosis LogicECS00CT6
Possible CauseECS00CT7
Check the following items.

Harness or connector
(The solenoid circuit is open or shorted.)

Line pressure solenoid valve
DTC Confirmation ProcedureECS00CT8
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and wait at
least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode for
“A/T” with CONSULT-II.
SCIA0735E
Monitor item Condition Specification
Line pressure solenoid valve dutySmall throttle opening
(Low line pressure)
↓
Large throttle opening
(High line pressure)Approximately 24%
↓
Approximately 95%
Diagnostic trouble code Malfunction is detected when... Check items (Possible cause)
: LINE PRESSURE S/V
TCM detects an improper voltage drop
when it tries to operate the solenoid valve.

Harness or connectors
(The solenoid circuit is open or shorted.)

Line pressure solenoid valve
: 10th judgement flicker
SAT014K

DISASSEMBLY
AT-425
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4. Set manual shaft to position P.
5. Remove park/neutral position (PNP) switch.
6. Remove bracket from transaxle case.
7. Remove revolution sensor from transaxle case.
8. Remove O-ring from revolution sensor.
9. Remove oil pan and oil pan gasket.

Do not reuse oil pan bolts.
10. Check foreign materials in oil pan to help determine causes of
malfunction. If the fluid is very dark, smells burned, or contains
foreign particles, the frictional material (clutches, band) may
need replacement. A tacky film that will not wipe clean indicates
varnish build up. Varnish can cause valves, servo, and clutches
to stick and can inhibit pump pressure.

If frictional material is detected, replace radiator after
repair of A/T. Refer to CO-12, "
RADIATOR" .
11. Remove magnets from oil pan.
12. Remove control valve assembly according to the following procedures.
a. Remove snap ring from terminal body.
b. Push terminal body into transaxle case and draw out terminal
cord assembly.
SCIA3154E
SCIA3476E
SCIA4866E
SCIA0801E

AT-452
[ALL]
REPAIR FOR COMPONENT PARTS


Check to see that retainer plates are properly positioned in con-
trol valve upper body.
Oil Strainer

Check wire netting of oil strainer for damage.
Shift Solenoid Valves “A” and “B”, Line Pressure Solenoid Valve, Torque Converter Clutch
Solenoid Valve and Overrun Clutch Solenoid Valve

Measure resistance.

Except for EURO-OBD:

For shift solenoid valve A, refer to AT- 3 5 0 , "SHIFT SOLENOID
VALVE A" .

For shift solenoid valve B, refer to AT- 3 5 6 , "SHIFT SOLENOID
VALVE B" .

For line pressure solenoid valve, refer to AT- 3 8 7 , "LINE PRES-
SURE SOLENOID VALVE" .

For torque converter clutch solenoid valve, refer to AT- 3 6 8 ,
"TORQUE CONVERTER CLUTCH SOLENOID VALVE" .

For overrun clutch solenoid valve, refer to AT- 3 6 2 , "OVERRUN
CLUTCH SOLENOID VALVE" .

For A/T fluid temperature sensor, refer toAT-374, "BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR
CIRCUIT AND TCM POWER SOURCE)" .

EURO-OBD:

For shift solenoid valve A, refer to AT- 1 6 1 , "DTC P0750 SHIFT SOLENOID VALVE A" .

For shift solenoid valve B, refer to AT- 1 6 7 , "DTC P0755 SHIFT SOLENOID VALVE B" .

For line pressure solenoid valve, refer to AT- 1 5 4 , "DTC P0745 LINE PRESSURE SOLENOID VALVE" .

For torque converter clutch solenoid valve, refer to AT- 1 4 8 , "DTC P0740 TORQUE CONVERTER
CLUTCH SOLENOID VALVE" .

For overrun clutch solenoid valve, refer to AT- 1 7 8 , "DTC P1760 OVERRUN CLUTCH SOLENOID VALVE"
.

For A/T fluid temperature sensor, refer to AT- 1 8 4 , "DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SEN-
SOR CIRCUIT AND TCM POWER SOURCE)" .
SCIA4979E
SCIA3291E
SCIA0805E

AT-456
[ALL]
REPAIR FOR COMPONENT PARTS

b. Install solenoid valve assembly and line pressure solenoid valve
on control valve assembly.
c. Tighten bolts a , c and g to specified torque.
d. Set oil strainer, then tighten bolts a , d and nut f to specified
torque.
e. Tighten bolts e to specified torque. : 7.8 N·m (0.80 kg-m, 69 in-lb)
SCIA4438E
: 7.8 N·m (0.80 kg-m, 69 in-lb)
SCIA3484E
: 4.0 N·m (0.41 kg-m, 35 in-lb)
SCIA3487E

SERVICE DATA AND SPECIFICATIONS (SDS)
AT-531
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Stall RevolutionECS00CXM
Line PressureECS00F1T
Control ValvesECS00F1U
CONTROL VALVE AND PLUG RETURN SPRINGS
For 85X23 model
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information.EngineStall revolution
rpm
QR20DE 2,450 - 2,950
QR25DE 2,300 - 2,750
Engine speed
rpmLine pressure kPa (kg/cm2 , psi)
D, 2 and 1 positions R position
Idle 500 (5.1, 73) 778 (7.9, 113)
Stall 1,233 (12.6, 179) 1,918 (19.6, 278)
PartsItem
Part No.* Free length Outer diameter
Upper body7 Pilot valve spring 31742-3AX03 38.98 (1.535) 8.9 (0.350)
35 1-2 accumulator valve spring 31742-3AX00 20.5 (0.807) 6.95 (0.274)
10 1-2 accumulator piston spring 31742-85X02 55.60 (2.189) 19.6 (0.772)
17 1st reducing valve spring 31742-80X05 27.0 (1.063) 7.0 (0.276)
19 3-2 timing valve spring 31736-01X00 23.0 (0.906) 6.65 (0.262)
24 Overrun clutch reducing valve spring 31742-80X15 37.5 (1.476) 6.9 (0.272)
26 Torque converter relief valve spring 31742-80X07 31.0 (1.220) 9.0 (0.354)
31 Torque converter clutch control valve 31742-85X00 56.98 (2.243) 6.5 (0.256)
3 Cooler check valve spring 31742-85X01 29.4 (1.157) 6.0 (0.236)
Lower body11 Pressure regulator valve spring 31742-80X13 45.0 (1.772) 15.0 (0.591)
16 Overrun clutch control valve spring 31762-80X00 21.7 (0.854) 7.0 (0.276)
20 Accumulator control valve spring 31742-80X02 22.0 (0.866) 6.5 (0.256)
25 Shift valve A spring 31762-80X00 21.7 (0.854) 7.0 (0.276)
30 Shuttle valve spring 31762-41X04 51.0 (2.008) 5.65 (0.222)
32 Shift valve B spring 31762-80X00 21.7 (0.854) 7.0 (0.276)
2 Pressure modifier piston spring 31742-41X15 30.5 (1.201) 9.8 (0.386)
6 Pressure modifier valve spring 31742-80X16 32.0 (1.260) 6.9 (0.272)
— Oil cooler relief valve spring 31872-31X00 17.02 (0.670) 8.0 (0.315)

AT-532
[ALL]
SERVICE DATA AND SPECIFICATIONS (SDS)

For 85X64 model
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information.
AccumulatorECS00F1V
O-RING
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information.PartsItem
Part No.* Free length Outer diameter
Upper body7 Pilot valve spring 31742-3AX03 38.98 (1.535) 8.9 (0.350)
35 1-2 accumulator valve spring 31742-3AX00 20.5 (0.807) 6.95 (0.274)
10 1-2 accumulator piston spring 31742-3AX08 55.26 (2.176) 19.6 (0.772)
17 1st reducing valve spring 31742-80X05 27.0 (1.063) 7.0 (0.276)
19 3-2 timing valve spring 31736-01X00 23.29 (0.917) 6.65 (0.262)
24 Overrun clutch reducing valve spring 31742-80X15 37.5 (1.476) 6.9 (0.272)
26 Torque converter relief valve spring 31742-80X07 31.0 (1.220) 9.0 (0.354)
31 Torque converter clutch control valve spring 31742-85X00 56.98 (2.243) 6.5 (0.256)
3 Cooler check valve spring 31742-85X01 29.4 (1.157) 6.0 (0.236)
Lower body11 Pressure regulator valve spring 31742-80X13 45.0 (1.772) 15.0 (0.591)
16 Overrun clutch control valve spring 31762-80X00 21.7 (0.854) 7.0 (0.276)
20 Accumulator control valve spring 31742-80X02 22.0 (0.866) 6.5 (0.256)
25 Shift valve A spring 31762-80X00 21.7 (0.854) 7.0 (0.276)
30 Shuttle valve spring 31762-41X04 51.0 (2.008) 5.65 (0.222)
32 Shift valve B spring 31762-80X00 21.7 (0.854) 7.0 (0.276)
2 Pressure modifier piston spring 31742-41X15 30.5 (1.201) 9.8 (0.386)
6 Pressure modifier valve spring 31742-80X16 32.0 (1.260) 6.9 (0.272)
— Oil cooler relief valve spring 31872-31X00 17.02 (0.670) 8.0 (0.315)
Accumulator Part No.*Inner diameter
(Small)Part No.*Inner diameter
(Large)
Servo release accumulator 31526 41X03 26.9 (1.059) 31526 41X02 44.2 (1.740)
N-D accumulator 31526 31X08 34.6 (1.362) 31672 21X00 39.4 (1.551)

RFD-22
REAR FINAL DRIVE ASSEMBLY

Disassembly and AssemblyEDS001ZD
DISASSEMBLY
Removal of Electric Controlled Coupling Assembly
1. Using a drive pinion flange wrench, remove companion flange lock nut.
2. Using a puller, remove the companion flange.
3. Remove coupling cover.
4. Using flat tip screwdriver, remove front oil seal from the coupling
cover.
CAUTION:
Be careful not to damage the coupling cover.
5. Remove electric controlled coupling assembly from the carrier case.
6. Using a puller, remove coupling front bearing from the electroni-
cally controlled coupling.
CAUTION:
When the bearing is replaced with new one, readjust the
shim between bearing and the coupling.
Removal of Differential Assembly
1. Using flat tip screwdriver, remove side oil seal from the carrier
case assembly.
CAUTION:
Be careful not to damage the carrier case and rear cover.
2. Remove rear cover mounting bolts.
3. Fit a drift to the right and left side bearing adjusting shims indi-
vidually. Press differential case assembly and side bearing to
remove carrier case assembly and rear cover.
CAUTION:
The pressure shall be as low as possible to remove carrier
case assembly and rear cover. The maximum pressure shall
be 10 kN (1 ton, 1.1 US ton, 1.0 Imp ton).
NOTE:
Differential case assembly, side bearings, and adjusting shims
are compressed and integrated in the carrier case and rear
cover.
4. Remove side bearing adjusting shims and side bearing outer
race.
PDG0213D
PDIA0177E
PDG0216D
PDIA0896E

REAR FINAL DRIVE ASSEMBLY
RFD-29
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5. Using the pin punch, drive a lock pin into the pinion mating shaft.
CAUTION:
Do not reuse the lock pin.
6. Using the suitable drift, press a side bearing inner race into the
differential case.
CAUTION:
Do not reuse the side bearing inner race.
7. Apply locking sealant onto the thread of the drive gear.
CAUTION:
The drive gear back, threaded holes, and drive gear bolts shall be cleaned and decreased suffi-
ciently.
8. Assemble the drive gear to the differential case, and tighten it with drive gear bolt. Refer to RFD-16,
"Components" .
9. Apply differential oil to the side bearings, and assemble new side bearing adjusting shims (2 pieces for
one side) with the same thickness as the ones installed prior to disassembly or re-install the old ones, with
a side bearing outer race to the differential case.
If the side bearing adjusting shims have been already selected, use them.
CAUTION:
Do not reuse the side bearing outer race.
10. Fit the suitable drifts to the right and left side bearing adjusting
shims individually. Compress differential case assembly and
side bearing to install the carrier case assembly to differential
case assembly.
CAUTION:

The drift shall be placed on the center of the adjusting
shims.

The pressure shall be as low as possible to install the
carrier case assembly into the differential assembly. The
maximum pressure shall be 1 ton.

If the adjusting shims are installed by tapping, the carrier
case may be damaged. Avoid tapping.
11. Install a dummy cover set, check and adjust the backlash, drive gear back runout, tooth contact, and over-
all preload torque. Refer to RFD-17, "
Pre-Inspection" .
12. Remove dummy cover set.
PDIA0897E
PDIA0901E
PDIA0900E