2003 NISSAN ALMERA N16 oil pressure

AT-164
[EURO-OBD]
DTC P0745 LINE PRESSURE SOLENOID VALVE
DTC P0745 LINE PRESSURE SOLENOID VALVE
PFP:31940
DescriptionECS007P2
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.
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”.
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%
Termi-
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.4 - 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

TROUBLE DIAGNOSES FOR SYMPTOMS
AT-215
[EURO-OBD]
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4.CHECK A/T FLUID CONDITION
1. Remove oil pan refer to AT-406, "
REMOVAL" .
2. Check A/T fluid condition.
OK or NG
OK >> GO TO 5
NG >> 1. Disassemble A/T.
2. Check the following items:
–Forward clutch assembly
–Overrun clutch assembly
–Reverse clutch assembly
5.CHECK SYMPTOM
Check again.
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.
5. Large Shock. “N” → “R” PositionECS007Q6
SYMPTOM:
There is large shock when changing from “N” to “R” position.
1.CHECK SELF-DIAGNOSTIC RESULTS
Does self-diagnosis show damage to A/T fluid temperature sensor,
line pressure solenoid valve or throttle position sensor circuit?
Ye s o r N o
Ye s > >●Check damaged circuit. Refer to the following items.
EURO-OBD
–AT- 1 6 4 , "DTC P0745 LINE PRESSURE SOLENOID
VA LV E"
–AT- 1 8 1 , "DTC P1705 ACCELERATOR PEDAL POSI-
TION (APP) SENSOR"
–AT- 1 9 5 , "DTC BATT/FLUID TEMP SEN (A/T FLUID
TEMP SENSOR CIRCUIT AND TCM POWER
SOURCE)"
No >> GO TO 2
2.CHECK THROTTLE POSITION SENSOR*
*: This sensor means accelerator pedal position (APP) sensor.
Refer to AT- 1 8 1 , "
DTC P1705 ACCELERATOR PEDAL POSITION
(APP) SENSOR" .
OK or NG
OK >> GO TO 3
NG >> Repair or replace Accelerator pedal position (APP) sen-
sor.
SAT171B
SCIA0769E
MCIB9006E

TROUBLE DIAGNOSES FOR SYMPTOMS
AT-217
[EURO-OBD]
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2.CHECK STALL TEST
Check stall revolution with selector lever in “1” and “R” positions.
Refer to AT-64, "
Sta ll Tes t" .
OK or NG
OK >> GO TO 3
OK in “1” position, NG in “R” position>>1.Remove control valve
assembly. Refer to AT- 4 0 6 , "
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 (AT- 1 6 4 , "DTC P0745
LINE PRESSURE SOLENOID VALVE" : EURO-OBD)
3. Disassemble A/T.
4. Check the following items:
–Oil pump assembly
–Torque converter
–Reverse clutch assembly
–High clutch assembly
–Low & reverse brake assembly
–Low one-way clutch
NG in both “1” and “R” positions>>GO TO 6
3.CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “R” position. Refer
to AT- 6 7 , "
Line Pressure Test" .
OK or NG
OK >> GO TO 4
NG >>1.Remove control valve assembly. Refer to AT- 4 0 6 ,
"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 (AT- 1 6 4 , "DTC P0745
LINE PRESSURE SOLENOID VALVE" : EURO-OBD)
3. Disassemble A/T.
4. Check the following item:
–Oil pump assembly
SAT493G
SAT494G

AT-218
[EURO-OBD]
TROUBLE DIAGNOSES FOR SYMPTOMS
4. CHECK A/T FLUID CONDITION
1. Remove oil pan, refer to AT- 4 0 6 , "
REMOVAL" .
2. Check A/T fluid condition.
OK or NG
OK >> GO TO 5
NG >> GO TO 6
5. CHECK SYMPTOM
Check again.
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.
6. DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT- 4 0 6 , "
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 (AT-164, "DTC P0745 LINE PRESSURE SOLENOID VALVE" : EURO-OBD)
3. Disassemble A/T.
4. Check the following items:
–Oil pump assembly
–Torque converter
–Reverse clutch assembly
–High clutch assembly
–Low & reverse brake assembly
–Low one-way clutch
OK or NG
OK >> GO TO 5
NG >> Repair or replace damaged parts.
SAT171B

TROUBLE DIAGNOSES FOR SYMPTOMS
AT-219
[EURO-OBD]
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7. Vehicle Does Not Creep Forward In “D”, “2” Or “1” PositionECS007Q8
SYMPTOM:
Vehicle does not creep forward when selecting “D”, “2” or “1” position.
1.CHECK A/T FLUID LEVEL
Check A/T fluid level again.
OK or NG
OK >> GO TO 2
NG >> Refill ATF.
2.CHECK STALL TEST
Check stall revolution with selector lever in “D” position. Refer to AT-
64, "Stall Tes t" .
OK or NG
OK >> GO TO 3
NG >> GO TO 6
3.CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “D” position. Refer
to AT-67, "
Line Pressure Test" .
OK or NG
OK >> GO TO 4
NG >>1.Remove control valve assembly. Refer to AT- 4 0 6 ,
"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 (AT- 1 6 4 , "DTC P0745
LINE PRESSURE SOLENOID VALVE" )
3. Disassemble A/T.
4. Check the following item:
–Oil pump assembly
SAT638A
SAT493G
SAT494G

AT-220
[EURO-OBD]
TROUBLE DIAGNOSES FOR SYMPTOMS
4. CHECK A/T FLUID CONDITION
1. Remove oil pan, refer to AT- 4 0 6 , "
REMOVAL" .
2. Check A/T fluid condition.
OK or NG
OK >> GO TO 5
NG >> GO TO 6
5. CHECK SYMPTOM
Check again.
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.
6. DETECT MALFUNCTIONING ITEM
1. Remove control valve assembly. Refer to AT- 4 0 6 , "
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 (AT-164, "DTC P0745 LINE PRESSURE SOLENOID VALVE" : EURO-OBD)
3. Disassemble A/T.
4. Check the following items:
–Oil pump assembly
–Forward clutch assembly
–Forward one-way clutch
–Low one-way clutch
–Low & reverse brake assembly
–Torque converter
OK or NG
OK >> GO TO 5
NG >> Repair or replace damaged parts.
SAT171B

TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-265
[EXC.F/EURO-OBD]
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Line Pressure TestECS007QT
LINE PRESSURE TEST PORTS
Location of line pressure test ports are shown in the illustration.
●Always replace pressure plugs as they are self-sealing
bolts.
LINE PRESSURE TEST PROCEDURE
1. Check A/T fluid and engine oil levels. If necessary, add fluid or
oil.
2. Drive vehicle for approx. 10 minutes or until engine oil and AT F
reach operating temperature.
3. Install pressure gauge to corresponding line pressure port.
4. Set parking brake and block wheels.
●Continue to depress brake pedal fully while line pressure test is being performed at stall speed.
5. Start engine and measure line pressure at idle and stall speed.
●When measuring line pressure at stall speed, follow the
stall test procedure.
Line pressure: Refer to AT- 5 1 5 , "
SERVICE DATA AND SPECIFI-
CATIONS (SDS)" .
SAT561J
ATF operating temperature: 50 - 80°C (122 -176°F)
SAT647B
UAT008
SAT493G

AT-266
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
JUDGEMENT OF LINE PRESSURE TEST
Road TestECS007QU
DESCRIPTION
●The purpose of the test is to determine overall performance of A/
T and analyze causes of problems.
●The road test consists of the following three parts:
1. Check before engine is started
2. Check at idle
3. Cruise test
●Before road test, familiarize yourself with all test procedures and
items to check.
●Conduct tests on all items until specified symptom is found.
Troubleshoot items which check out No Good after road test.
Refer to the following items.
Judgement Suspected parts
At idleLine pressure is low in all positions.
●Oil pump wear
●Control piston damage
●Pressure regulator valve or plug sticking
●Spring for pressure regulator valve damaged
●Fluid pressure leakage between oil strainer and pressure regulator valve
●Clogged strainer
Line pressure is low in particular posi-
tion.
●Fluid pressure leakage between manual valve and particular clutch
●For example, line pressure is:
− Low in “R” and “1” positions, but
− Normal in “D” and “2” positions.
Therefore, fluid leakage exists at or around low and reverse brake circuit.
Refer to AT- 1 8 , "
CLUTCH AND BAND CHART" .
Line pressure is high.
●Maladjustment of throttle position sensor
●A/T fluid temperature sensor damaged
●Line pressure solenoid valve sticking
●Short circuit of line pressure solenoid valve circuit
●Pressure modifier valve sticking
●Pressure regulator valve or plug sticking
●Open in dropping resistor circuit
At stall
speedLine pressure is low.
●Maladjustment of throttle position sensor
●Line pressure solenoid valve sticking
●Short circuit of line pressure solenoid valve circuit
●Pressure regulator valve or plug sticking
●Pressure modifier valve sticking
●Pilot valve sticking
SAT786A
SAT496G