2008 NISSAN TIIDA low oil pressure

DTC P0745 LINE PRESSURE SOLENOID VALVE
AT-129
< SERVICE INFORMATION >
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DTC P0745 LINE PRESSURE SOLENOID VALVE
DescriptionINFOID:0000000001703266
The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in
response to signals sent from the TCM.
The line pressure duty cycle value is not constant 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-III Reference Value in Data Monitor ModeINFOID:0000000001703267
Remarks: Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001703268
• This is an OBD-II self-diagnostic item.
• Diagnostic trouble code “P0745 LINE PRESSURE S/V” with CONSULT-III or 11th judgement flicker without
CONSULT-III is detected when TCM detects an improper voltage drop while it tries to operate the solenoid
valve.
Possible CauseINFOID:0000000001703269
• Harness or connector
(The solenoid circuit is open or shorted.)
• Line pressure solenoid valve
DTC Confirmation ProcedureINFOID:0000000001703270
CAUTION:
If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait at
least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Turn ignition switch ON and select “DATA MONITOR” mode for “A/T” with CONSULT-III.
2. Touch “START”.
3. Depress accelerator pedal completely and wait at least 1 second.
4. If the check result is NG, go to AT-131, "
Diagnosis Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-III”.
WITHOUT CONSULT-III
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-78, "
Diagnosis Procedure without CONSULT-III" .
4. If the check result is NG, go to AT-131, "
Diagnosis Procedure" .
Item name Condition Display value (Approx.)
LINE PRES DTYSmall throttle opening (Low line pressure) ⇔ Large
throttle opening (High line pressure)0% ⇔ 94%

AT-180
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4.DETECT MALFUNCTIONING ITEM
1. Disassemble A/T. Refer to AT-240, "
Disassembly" .
2. Check the following items:
- Forward clutch assembly. Refer to AT-288, "
Forward and Overrun Clutches" .
- Overrun clutch assembly. Refer to AT-288, "
Forward and Overrun Clutches" .
- Reverse clutch assembly. Refer to AT-279, "
Reverse Clutch" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.CHECK SYMPTOM
Check again. Refer to AT-53, "
Check at Idle" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
6.CHECK TCM
1. Check TCM input/output signals. Refer to AT-71, "
TCM Terminal 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.
Large Shock "N" → "R" PositionINFOID:0000000001703339
SYMPTOM:
There is a large shock when changing from “N” to “R” position.
DIAGNOSTIC PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-73, "
CONSULT-III Function (A/T)" or AT-78, "Diagnosis Procedure without
CONSULT-III" .
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to AT-73, "CONSULT-III Function (A/T)" or AT-78, "Diag-
nosis Procedure without CONSULT-III" .
NO >> GO TO 2.
2.CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “D” position. Refer to AT-48, "
Inspections Before Trouble
Diagnosis" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-216, "
Control Valve Assembly and Accumulators" .
2. Check the following items:
- Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot fil-
ter)
- Line pressure solenoid valve
- Oil pump assembly. Refer to AT-260, "
Oil Pump" .
OK or NG
OK >> GO TO 4.

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-181
< SERVICE INFORMATION >
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NG >> Repair or replace damaged parts.
4.CHECK SYMPTOM
Check again. Refer to AT-53, "
Check at Idle" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 5.
5.CHECK TCM
1. Check TCM input/output signals. Refer to AT-71, "
TCM Terminal 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.
Vehicle Does Not Creep Backward in "R" PositionINFOID:0000000001703340
SYMPTOM:
Vehicle does not creep backward when selecting “R” position.
DIAGNOSTIC PROCEDURE
1.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to MA-22, "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 2.
NG >> Refill ATF.
2.CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “R” position. Refer to AT-48, "
Inspections Before Trouble
Diagnosis" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-216, "
Control Valve Assembly and Accumulators" .
2. Check the following items:
- Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot fil-
ter)
- Line pressure solenoid valve
3. Disassemble A/T. Refer to AT-240, "
Disassembly" .
4. Check the following item:
- Oil pump assembly. Refer to AT-260, "
Oil Pump" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK STALL REVOLUTION
Check stall revolution with selector lever in “1” and “R” positions. Refer to AT-48, "
Inspections Before Trouble
Diagnosis" .
OK or NG
OK >> GO TO 6.
OK in “1” position, NG in “R” position>> GO TO 5.
NG in both “1” and “R” positions>> GO TO 7.
5.DETECT MALFUNCTIONING ITEM
1. Disassemble A/T. Refer to AT-240, "
Disassembly" .

AT-182
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
2. Check the following items:
- Low & reverse brake assembly. Refer to AT-295, "
Low & Reverse Brake" .
- Reverse clutch assembly. Refer to AT-279, "
Reverse Clutch" .
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-230, "
Component" .
2. Check A/T fluid condition. Refer to AT-48, "
Inspections Before Trouble Diagnosis" .
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7.DETECT MALFUNCTIONING ITEM
1. Disassemble A/T. Refer to AT-240, "
Disassembly" .
2. Check the following items:
- Reverse clutch assembly. Refer to AT-279, "
Reverse Clutch" .
- High clutch assembly. Refer to AT-284, "
High Clutch" .
- Low & reverse brake assembly. Refer to AT-295, "
Low & Reverse Brake" .
- Forward clutch assembly. Refer to AT-288, "
Forward and Overrun Clutches" .
- Overrun clutch assembly. Refer to AT-288, "
Forward and Overrun Clutches" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
8.CHECK SYMPTOM
Check again. Refer to AT-53, "
Check at Idle" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 9.
9.CHECK TCM
1. Check TCM input/output signals. Refer to AT-71, "
TCM Terminal 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.
Vehicle Does Not Creep Forward in "D", "2" or "1" PositionINFOID:0000000001703341
SYMPTOM:
Vehicle does not creep forward when selecting “D”, “2” or “1” position.
DIAGNOSTIC PROCEDURE
1.CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to MA-22, "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 2.
NG >> Refill ATF.
2.CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “D” position. Refer to AT-48, "
Inspections Before Trouble
Diagnosis" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-183
< SERVICE INFORMATION >
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3.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-216, "
Control Valve Assembly and Accumulators" .
2. Check the following items:
- Valves to control line pressure (Pressure regulator valve, pressure modifier valve, pilot valve and pilot fil-
ter)
- Line pressure solenoid valve
3. Disassemble A/T. Refer to AT-240, "
Disassembly" .
4. Check the following item:
- Oil pump assembly. Refer to AT-260, "
Oil Pump" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4.CHECK STALL REVOLUTION
Check stall revolution with selector lever in “D” position. Refer to AT-48, "
Inspections Before Trouble Diagno-
sis" .
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING ITEM
1. Disassemble A/T. Refer to AT-240, "
Disassembly" .
2. Check the following items:
- Oil pump assembly. Refer to AT-260, "
Oil Pump" .
- Forward clutch assembly. Refer to AT-288, "
Forward and Overrun Clutches" .
- Forward one-way clutch. Refer to AT-299, "
Rear Internal Gear and Forward Clutch Hub" .
- Low one-way clutch. Refer to AT-240, "
Disassembly" .
- Torque converter. Refer to AT-240, "
Disassembly" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-230, "
Component" .
2. Check A/T fluid condition. Refer to AT-48, "
Inspections Before Trouble Diagnosis" .
OK or NG
OK >> GO TO 7.
NG >> GO TO 5.
7.CHECK SYMPTOM
Check again. Refer to AT-53, "
Check at Idle" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 8.
8.CHECK TCM
1. Check TCM input/output signals. Refer to AT-71, "
TCM Terminal 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.
Vehicle Cannot Be Started from D1INFOID:0000000001703342
SYMPTOM:
Vehicle cannot be started from D1 on “Cruise Test — Part 1”.

AT-184
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS FOR SYMPTOMS
DIAGNOSTIC PROCEDURE
1.CHECK SYMPTOM
Check symptom. Refer to AT-53, "
Check at Idle" .
Is
“Vehicle Dose Not Creep Backward in “R” Position” OK?
OK >> GO TO 2.
NG >> Go to AT-181, "
Vehicle Does Not Creep Backward in "R" Position" .
2.CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT-73, "
CONSULT-III Function (A/T)" or AT-78, "Diagnosis Procedure without
CONSULT-III" .
Is any malfunction detected by self-diagnostic results?
YES >> Check the malfunctioning system. Refer to AT-73, "CONSULT-III Function (A/T)" or AT-78, "Diag-
nosis Procedure without CONSULT-III" .
NO >> GO TO 3.
3.CHECK ACCELERATOR PEDAL POSITION SENSOR
Check accelerator pedal position sensor. Refer to EC-493
.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace accelerator pedal position sensor.
4.CHECK LINE PRESSURE
Check line pressure at stall point with selector lever in “D” position. Refer to AT-48, "
Inspections Before Trou-
ble Diagnosis" .
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT-216, "
Control Valve Assembly and Accumulators" .
2. Check the following items:
- Shift valve A
- Shift valve B
- Shift solenoid valve A
- Shift solenoid valve B
- Pilot valve
- Pilot filter
3. Disassemble A/T. Refer to AT-240, "
Disassembly" .
4. Check the following items:
- Forward clutch assembly. Refer to AT-288, "
Forward and Overrun Clutches" .
- Low one-way clutch. Refer to AT-240, "
Disassembly" .
- Forward one-way clutch. Refer to AT-299, "
Rear Internal Gear and Forward Clutch Hub" .
- High clutch assembly. Refer to AT-284, "
High Clutch" .
- Torque converter. Refer to AT-240, "
Disassembly" .
- Oil pump assembly. Refer to AT-260, "
Oil Pump" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
6.CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-230, "
Component" .
2. Check A/T fluid condition. Refer to AT-48, "
Inspections Before Trouble Diagnosis" .
OK or NG
OK >> GO TO 7.
NG >> GO TO 5.
7.DETECT MALFUNCTIONING ITEM

AT-242
< SERVICE INFORMATION >
DISASSEMBLY
9. Set manual shaft (1) in “P” position.
10. Remove PNP switch (2) from transaxle case.
: Bolt (3)
11. Remove oil pan fitting bolts.
12. Remove oil pan and oil pan gasket.
13. Check foreign materials in oil pan to help determine causes of
malfunction. If the ATF is very dark, smells burned, or contains
foreign particles, frictional material (clutches, band) may need
replacement. A tacky film that will not wipe clean indicates var-
nish 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-11
.
14. Remove magnets from oil pan.
15. Remove control valve assembly according to the following procedures.
a. Remove snap ring (1) from terminal body (2).
CAUTION:
Do not expand snap ring (1) excessively.
b. Push terminal body (2) into transaxle case.
c. Remove control valve assembly fitting bolts A, B and C.
Bolt length, number and location:
d. Remove control valve assembly from transaxle case.
CAUTION:
Be careful not to drop manual valve.
SCIA5904J
SCIA8025E
SCIA6030J
Bolt symbol A B C
Bolt length “ ” [mm (in)]
40.0 mm
(1.575 in)33.0 mm
(1.299 in)43.5 mm
(1.713 in)
Number of bolts 5 6 2
SCIA5911J

AT-264
< SERVICE INFORMATION >
REPAIR FOR COMPONENT PARTS
DISASSEMBLY
1. Pilot filter 2. Control valve upper body 3. Steel ball
4. Separating plate 5. Control valve inter body 6. Steel ball
7. Support plate 8. Separating plate 9. Control valve lower body
10. Line pressure relief valve spring 11. Check ball 12. Torque converter pressure holding
spring
13. Solenoid valve assembly 14. Terminal body 15. O-ring
16. O-ring 17. O-ring 18. Oil strainer
Refer to GI section to make sure icons (symbol marks) in the figure. Refer to GI-8, "
Component".
SCIA5967J