NISSAN X-TRAIL 2001 Service Repair Manual

DTC P0745 LINE PRESSURE SOLENOID VALVE
AT-163
[EURO-OBD]
D
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DTC P0745 LINE PRESSURE SOLENOID VALVEPFP:31940
DescriptionECS004RU
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
pressure duty cycle at low pressure, the accelerator (throttle)
should be open until the closed throttle position switch is
“OFF”.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
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”.
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
ON BOARD DIAGNOSIS LOGIC
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%
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 - 2.5V
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
Diagnostic trouble code Malfunction is detected when... Check items (Possible cause)
: L/PRESS SOL/CIRC
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
: P0745

AT-164
[EURO-OBD]
DTC P0745 LINE PRESSURE SOLENOID VALVE
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch “OFF” and wait at least 5 seconds before conducting the
next test.
After the repair, perform the following procedure to confirm the mal-
function is eliminated.
With CONSULT-II
1. Turn ignition switch “ON” and select “DATA MONITOR” mode for
“ENGINE” with CONSULT-II.
2. Depress accelerator pedal completely and wait at least 5 sec-
onds.
With GST
Follow the procedure “With CONSULT-II”.
SAT014K
SAT020K

DTC P0745 LINE PRESSURE SOLENOID VALVE
AT-165
[EURO-OBD]
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Wiring Diagram — AT — LPSVECS004RV
TCWA0046E

AT-166
[EURO-OBD]
DTC P0745 LINE PRESSURE SOLENOID VALVE
Diagnostic Procedure
ECS004RW
1. CHECK VALVE RESISTANCE
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminal 4 and ground.
OK or NG
OK >> GO TO 2.
NG >> 1. Remove control valve assembly. Refer to AT- 4 1 4 ,
"REMOVAL" .
2. Check the following items:
–Line pressure solenoid valve
Refer to AT-168, "
Component Inspection" .
–Harness of terminal cord assembly for short or open
2. CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 4 and TCM harness connector terminal 2.
OK or NG
OK >> GO TO 3.
NG >> Check the following items:
●Dropping resistor
Refer to AT-168, "
Component Inspection" .
●Harness for short or open between TCM terminal 2
and terminal cord assembly Resistance: 2.5 - 5Ω
SCIA0741E
Resistance: 10 - 15Ω
SCIA0742E

DTC P0745 LINE PRESSURE SOLENOID VALVE
AT-167
[EURO-OBD]
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3.CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Check resistance between terminal 4 and TCM harness connector terminal 1.
If OK, check harness for short to ground and short to power.
3. Reinstall any part removed.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
4.CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure. Refer to AT- 1 6 4 , "
DIAGNOSTIC TROUBLE
CODE (DTC) CONFIRMATION PROCEDURE" .
OK or NG
OK >>INSPECTION END
NG >> 1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector. Resistance: Approx. 0Ω
SCIA0743E

AT-168
[EURO-OBD]
DTC P0745 LINE PRESSURE SOLENOID VALVE
Component Inspection
ECS004RX
LINE PRESSURE SOLENOID VALVE
●For removal, refer to AT-414, "REMOVAL" .
Resistance Check
●Check resistance between two terminals.
Operation Check
●Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground.
SCIA0744E
Solenoid valve Terminal No.Resistance
(Approx.)
Line pressure
solenoid valve4 Ground 2.5 - 5Ω
SCIA0745E

DTC P0745 LINE PRESSURE SOLENOID VALVE
AT-169
[EURO-OBD]
D
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AT
DROPPING RESISTOR
●Check resistance between two terminals.
Resistance: 10 - 15Ω
SCIA0746E

AT-170
[EURO-OBD]
DTC P0750 SHIFT SOLENOID VALVE A
DTC P0750 SHIFT SOLENOID VALVE A
PFP:31940
DescriptionECS004RY
Shift solenoid valves A and B are turned “ON” or “OFF” by the TCM
in response to signals sent from the PNP switch, vehicle speed and
throttle position sensors. Gears will then be shifted to the optimum
position.
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
ON BOARD DIAGNOSIS LOGIC
SCIA0718E
Gear position 1 2 3 4
Shift solenoid valve A ON (Closed) OFF (Open) OFF (Open) ON (Closed)
Shift solenoid valve B ON (Closed) ON (Closed) OFF (Open) OFF (Open)
Termi-
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
11 L / WShift solenoid
valve AWhen shift solenoid valve A oper-
ates.
(When driving in “D
1 ” or “D4 ”.)Battery voltage
When shift solenoid valve A does not
operate.
(When driving in “D
2 ” or “D3 ”.)0V
Diagnostic trouble code Malfunction is detected when... Check items (Possible cause)
: SFT SOL A/CIRC
TCM detects an improper voltage drop
when it tries to operate the solenoid valve.
●Harness or connectors
(The solenoid circuit is open or shorted.)
●Shift solenoid valve A
: P0750

DTC P0750 SHIFT SOLENOID VALVE A
AT-171
[EURO-OBD]
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DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch “OFF” and wait at least 5 seconds before conducting the
next test.
After the repair, perform the following procedure to confirm the mal-
function is eliminated.
With CONSULT-II
1. Turn ignition switch “ON” and select “DATA MONITOR” mode for
“ENGINE” with CONSULT-II.
2. Start engine.
3. Drive vehicle in D position and allow the transmission to shift “1”
→ “2” (“GEAR”).
With GST
Follow the procedure “With CONSULT-II”.
SAT014K
SAT020K

AT-172
[EURO-OBD]
DTC P0750 SHIFT SOLENOID VALVE A
Wiring Diagram — AT — SSV/A
ECS004RZ
TCWA0040E