2005 NISSAN X-TRAIL check

AT-154
[EURO-OBD]
DTC P0745 LINE PRESSURE SOLENOID VALVE

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 pres-
sure 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”.
On Board Diagnosis LogicECS00CU7
Possible CauseECS00CU8
Check the following items.

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

Line pressure solenoid valve
DTC Confirmation ProcedureECS00CU9
NOTE:
If “DTC Confirmation Procedure” 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 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 0%
↓
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
: P0745
SAT014K

DTC P0745 LINE PRESSURE SOLENOID VALVE
AT-155
[EURO-OBD]
D
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2. Depress accelerator pedal completely and wait at least 5 sec-
onds.
3. If check result is NG, go to AT- 1 5 7 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
WITHOUT CONSULT-II
1. Start engine.
2. With brake pedal depressed, shift the lever from P → N → D →
N → P positions.
3. Perform safe-diagnosis.
Refer to AT- 5 2 , "
Diagnostic Procedure Without CONSULT-II" .
4. If the check result is NG, go to AT- 1 5 7 , "
Diagnostic Procedure" .
SCIA5358E
SCIA5600E

DTC P0745 LINE PRESSURE SOLENOID VALVE
AT-157
[EURO-OBD]
D
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TERMINALS AND REFERENCE VALUE MEASURED BETWEEN EACH TERMINAL
Diagnostic ProcedureECS004RW
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 terminal 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 - 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
Monitor item Condition Display value
LINE PRES
DTY (%)Line pressure low – Line pressure high 0% – 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
SCIA3267E

AT-158
[EURO-OBD]
DTC P0745 LINE PRESSURE SOLENOID VALVE

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 terminal and ground.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.Resistance: Approx.12Ω
SCIA3276E
Resistance: 2.5 - 5Ω
SCIA3457E

DTC P0745 LINE PRESSURE SOLENOID VALVE
AT-159
[EURO-OBD]
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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 terminal and TCM connector terminal.
4. Check continuity between terminal cord assembly harness con-
nector terminal and dropping resistor harness connector termi-
nal.
5. Check continuity between dropping resistor harness connector
terminal and TCM connector terminal.
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- 1 5 4 , "
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)
SCIA3273E
Item Connector No.Terminal No.
(Wire color)Continuity
TCM F46 2 (P/B)
Ye s
Dropping resistor harness
connectorE49 2 (P/B)
SCIA3274E

AT-160
[EURO-OBD]
DTC P0745 LINE PRESSURE SOLENOID VALVE

Component InspectionECS004RX
LINE PRESSURE SOLENOID VALVE

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

Check resistance between terminal 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 valve4 Ground 2.5 - 5Ω
SCIA3457E
SCIA3275E
Resistance: Approx.12Ω
SCIA3276E

DTC P0750 SHIFT SOLENOID VALVE A
AT-161
[EURO-OBD]
D
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DTC P0750 SHIFT SOLENOID VALVE APFP: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.
CONSULT-II REFERENCE VALUE IN DATE MONITOR MODE
Remarks: Specification data are reference values.
On Board Diagnosis LogicECS00CUA
Possible CauseECS00CUB
Check the following items.

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

Shift solenoid valve A
DTC Confirmation ProcedureECS00CUC
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” 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 malfunction is eliminated.
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)
Monitor item Condition Display value
SHIFT S/V A (ON/OFF)When shift solenoid valve A operates.
(When driving in D
1 or D4 .)ON
When shift solenoid valve A does not operate.
(When driving in D
2 or D3 .)OFF
Diagnostic trouble code Malfunction is detected when... Check items (Possible cause)
: SHIFT SOLENOID/V A
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

AT-162
[EURO-OBD]
DTC P0750 SHIFT SOLENOID VALVE A

WITH CONSULT-II
1. Turn ignition switch ON and select “DATA MONITOR” mode for
“A/T” with CONSULT-II.
2. Start engine.
3. Drive vehicle in D position and allow the transaxle to shift “1” →
“2” (“GEAR”).
4. If the check result is NG, go to AT- 1 6 4 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
WITHOUT CONSULT-II
1. Start engine.
2. Drive vehicle in D
1 → D2 position.
3. Perform safe-diagnosis.
Refer to AT- 5 2 , "
Diagnostic Procedure Without CONSULT-II" .
4. If the check result is NG, go to AT- 1 6 4 , "
Diagnostic Procedure" .
SAT014K
SCIA5358E
SCIA5594E