NISSAN X-TRAIL 2005 Service Repair Manual

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.
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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

AT-388
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LINE PRESSURE SOLENOID VALVE

2. Depress accelerator pedal completely and wait at least 5 sec-
onds.
3. If check result is NG, go to AT- 3 9 0 , "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Start engine.
2. With brake pedal depressed, shift the lever from P → N → D → N → P positions.
3. Perform self-diagnosis.
Refer to AT- 5 2 , "
Diagnostic Procedure Without CONSULT-II" .
4. If the check result is NG, go to AT- 3 9 0 , "
Diagnostic Procedure" .
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LINE PRESSURE SOLENOID VALVE
AT-389
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Wiring Diagram — AT — LPSVECS004UG
TCWA0046E

AT-390
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LINE PRESSURE SOLENOID VALVE

TERMINALS AND REFERENCE VALUE MEASURED BETWEEN EACH TERMINAL
Diagnostic ProcedureECS004UH
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Read out the value of “LINE PRES DTY” while driving.
Check the value changes according to driving speed.
Without CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Check voltage between TCM connector and ground.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
1R/WLine pressure
solenoid valveWhen releasing accelerator pedal
after warming up engine.1.5 - 3.0V
When depressing accelerator pedal
fully after warming up engine.0V
2P/BLine pressure
solenoid valve
(with dropping
resistor)When releasing accelerator pedal
after warming up engine.5 - 14V
When depressing accelerator pedal
fully after warming up engine.0V
Monitor item Condition Display value
LINE PRES
DTY (%)Line pressure low – Line pressure high 24% – 95%
SCIA3251E
Name Connec-
tor No. Terminal
No. (Wire
color) ConditionJudge-
ment stan-
dard
(Approx.)
Line pres-
sure sole-
noid valve F46 1 (R/W) -
GroundWhen releasing acceler-
ator pedal after warming
up engine.1.5 - 3.0V
When depressing accel-
erator pedal fully after
warming up engine.0V
Line pres-
sure sole-
noid valve
(with drop-
ping resis-
tor) F46 2 (P/B) -
GroundWhen releasing acceler-
ator pedal after warming
up engine.5 - 14V
When depressing accel-
erator pedal fully after
warming up engine.0V
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LINE PRESSURE SOLENOID VALVE
AT-391
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2. CHECK DROPPING RESISTOR
1. Turn ignition switch OFF.
2. Disconnect dropping resistor harness connector in engine room.
3. Check resistance between terminal 1 and 2.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK VALVE RESISTANCE
1. Turn ignition switch OFF.
2. Disconnect terminal cord assembly connector in engine room.
3. Check resistance between terminal cord assembly harness con-
nector F23 terminal 4 (R/W) and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.Resistance: Approx.12Ω
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Resistance: 2.5 - 5Ω
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AT-392
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LINE PRESSURE SOLENOID VALVE

4. CHECK HARNESS BETWEEN TCM AND TERMINAL CORD ASSEMBLY HARNESS CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect terminal cord assembly harness connector and TCM connector.
3. Check continuity between terminal cord assembly harness con-
nector and TCM connector.
4. Check continuity between terminal cord assembly harness con-
nector and dropping resistor harness connector.
5. Check continuity between dropping resistor harness connector
and TCM connector.
6. If OK, check harness for short to ground and short to power.
7. If OK, check continuity between ground and transaxle assembly.
8. Reinstall any part removed.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK DTC
Perform AT- 3 8 7 , "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
6. CHECK TCM
1. Check TCM input/output signal. Refer to AT- 9 4 , "
TCM Terminals and Reference Value" .
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Item Connector No.Terminal No.
(Wire color)Continuity
TCM F46 1 (R/W)
Ye s
Terminal cord assembly
harness connectorF23 4 (R/W)
SCIA3272E
Item Connector No.Terminal No.
(Wire color)Continuity
Dropping resistor harness
connectorE49 1 (R/W)
Ye s
Terminal cord assembly
harness connectorF23 4 (R/W)
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Item Connector No.Terminal No.
(Wire color)Continuity
TCM F46 2 (P/B)
Ye s
Dropping resistor harness
connectorE49 2 (P/B)
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LINE PRESSURE SOLENOID VALVE
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Component InspectionECS004UI
LINE PRESSURE SOLENOID VALVE

For removal, refer to AT- 4 0 4 , "Control Valve Assembly and Accumulators" .
Resistance Check

Check resistance between terminal 4 and ground.
Operation Check

Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground.
DROPPING RESISTOR

Check resistance between terminal 1 and 2.
Solenoid valve Terminal No.Resistance
(Approx.)
Line pressure
solenoid valve4Ground2.5 - 5Ω
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Resistance: Approx.12Ω
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AT-394
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MAIN POWER SUPPLY AND GROUND CIRCUIT

MAIN POWER SUPPLY AND GROUND CIRCUITPFP:00100
DescriptionECS00CS1
When the power supply to the TCM is cut OFF, for example because the battery is removed, and the self-diag-
nostics memory function stops, malfunction is detected.
On Board Diagnosis LogicECS00CS2

Diagnostic trouble code “INITIAL START” with CONSULT-II is detected when TCM dose not receive the
voltage signal from the battery power supply.

This is not a malfunction message. (Whenever shutting “OFF” a power supply to the TCM, this message
appears on the screen.)
Possible CauseECS00CS3
Harness or connector
(Battery or ignition switch and TCM circuit is open or shorted.)
DTC Confirmation ProcedureECS00CS4
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.
WITH CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Wait for at least 2 consecutive seconds.
4. If DTC is detected, go to AT- 3 9 6 , "
Diagnostic Procedure" .
SAT014K

MAIN POWER SUPPLY AND GROUND CIRCUIT
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Wiring Diagram — AT — MAINECS004TH
TCWA0240E

AT-396
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MAIN POWER SUPPLY AND GROUND CIRCUIT

TERMINALS AND REFERENCE VALUE MEASURED BETWEEN EACH TERMINAL
Diagnostic ProcedureECS004TI
1. CHECK TCM POWER SOURCE
1. Turn ignition switch to ON. (Do not start engine.)
2. Check voltage between TCM terminals 10, 19, 28 and ground.
3. Turn ignition switch to OFF.
4. Check voltage between TCM terminal 10, 19, 28 and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING ITEM
Check the following items:

Harness for short or open between ignition switch and TCM terminals 10, 19 and 28

Fuse

Ignition switch
Refer to “PG-2, "
POWER SUPPLY ROUTING" , “POWER SUPPLY ROUTING”.
OK or NG
OK >> GO TO 4
NG >> Repair or replace damaged parts.
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
10 BR/W Power source
or When turning ignition switch to “ON”. Battery voltage
When turning ignition switch to
“OFF”.0V
19 BR/W Power source Same as No. 10
25 B/W Ground Always 0V
28 LPower source
(Memory back-up)Always Battery voltage
48 B/W Ground Always 0V
Name Connec-
tor No. Terminal
No. (Wire
color)Judgement standard (Approx.)
Power source F4610 (BR/W) Battery voltage
19 (BR/W) Battery voltage
Power source
(Memory back-up)F47 28 (L) Battery voltage
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Name Connec-
tor No. Terminal No.
(Wire color)Judgement standard
(Approx.)
Power source F4610 (BR/W) 0V
19 (BR/W) 0V
Power source
(Memory back-up)F47 28 (L) Battery voltage
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