2004 INFINITI FX35 engine oil

TROUBLE DIAGNOSIS
AT-51
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Revision: 2004 November 2004 FX35/FX45
Inspections Before Trouble DiagnosisACS007A7
A/T FLUID CHECK
Fluid Leakage and Fluid Level Check

Inspect for fluid leakage and check the fluid level. Refer to AT- 1 2 , "Checking A/T Fluid" .
Fluid Condition Check
Inspect the fluid condition.
STALL TEST
Stall Test Procedure
1. Inspect the amount of engine oil. Replenish the engine oil if necessary.
2. Drive for about 10 minutes to warm up the vehicle so that the A/
T fluid temperature is 50 to 80°C (122 to 176°F). Inspect the
amount of A/T fluid. Replenish if necessary.
3. Securely engage the parking brake so that the tires do not turn.
4. Start engine, apply foot brake, and place selector lever in “D”
position.
5. While holding down the foot brake, gradually press down the
accelerator pedal.
6. Quickly read off the stall speed, then quickly remove your foot
from the accelerator pedal.
CAUTION:
Do not hold down the accelerator pedal for more than 5 sec-
onds during this test.
7. Move the selector lever to “N” position.
8. Cool down the A/T fluid.
Fluid condition Conceivable Cause Required Operation
Varnished (viscous
varnish state)Clutch, brake
scorchedReplace the A/T fluid and check the
A/T main unit and the vehicle for
malfunctions (wire harnesses,
cooler pipes, etc.)
Milky white or
cloudyWater in the fluidReplace the A/T fluid and check for
places where water is getting in.
Large amount of
metal powder mixed
inUnusual wear of
sliding parts within
A/TReplace the A/T fluid and check for
improper operation of the A/T.
SAT638A
SAT647B
SCIA1224E
SAT514G

AT-52
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
CAUTION:
Run the engine at idle for at least one minute.
Judgement Stall Test
O: Stall speed within standard value position
H: Stall speed higher than standard value
L: Stall speed lower than standard value
Stall test standard value position
LINE PRESSURE TEST
Line Pressure Test Port
Line Pressure Test Procedure
1. Inspect the amount of engine oil and replenish if necessary.
2. Drive the car for about 10 minutes to warm it up so that the A/T fluid reaches in range of 50 to 80°C (122
to 176°F), then inspect the amount of A/T fluid and replenish if necessary.
NOTE:
The A/T fluid temperature rises in range of 50 to 80°C (122 to 176°F) during 10 minutes of driving.
3. Remove front propeller shaft from vehicle (with AWD models). Refer to PR-4, "
Removal and Installation" . Stall speed:
VQ35DE engine: 2,650 - 2,950 rpm
VK45DE engine: 2,300 - 2,600 rpm
Selector lever position
Expected problem location
D, M R
Stall speedHO

Forward brake

Forward one-way clutch

1st one-way clutch

3rd one-way clutch
OH

Reverse brake
LL

Engine and torque converter one-way clutch
HH

Line pressure low
Does not shift up D, M position 1 → 2 Slipping in 2nd, 3rd, 4th gears Direct clutch slippage
Does not shift up D, M position 2 → 3 Slipping in 3rd, 4th, 5th gears high and low reverse clutch slippage
Does not shift up D, M position 3 → 4 Slipping in 4th, 5th gears Input clutch slippage
Does not shift up D, M position 4 → 5 Slipping in 5th gear Front brake slippage
SCIA2187E

TROUBLE DIAGNOSIS
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Revision: 2004 November 2004 FX35/FX45
4. After warming up remove the oil pressure detection plug and
install the oil pressure gauge [ST2505S001(J-34301-C)].
CAUTION:
When using the oil pressure gauge, be sure to use the O-
ring attached to the oil pressure detection plug.
5. Securely engage the parking brake so that the tires do not turn.
6. Start the engine, then measure the line pressure at both idle and
the stall speed.
CAUTION:

Keep the brake pedal pressed all the way down during
measurement.

When measuring the line pressure at the stall speed,
refer to AT- 5 1 , "
STALL TEST" .
7. After the measurements are complete, install the oil pressure
detection plug and tighten to the regulation torque below.
CAUTION:
Do not reuse the O-ring.
Line Pressure
SCIA5309E
SCIA1224E
:7.3 N·m (0.74 kg-m, 65 in-lb)SAT493G
Engine speedLine pressure [kPa (kg/cm
2 , psi)]
R position D, M positions
At idle speed 392 - 441 (4.0 - 4.5, 57 - 64) 373 - 422 (3.8 - 4.3, 54 - 61)
At stall speed 1,700 - 1,890 (17.3 - 19.3, 247 - 274) 1,310 - 1,500 (13.3 - 15.3, 190 - 218)

AT-54
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
Judgement of Line Pressure Test
ROAD TEST
Description

The road test inspects overall performance of the A/T and analyzes possible malfunction causes.

The road test is carried out in the following three stages.
1. Check before engine is started. Refer to AT- 5 5
.
2. Check at idle. Refer to AT- 5 5
.
3. Cruise test

Inspect all the items from Part 1 to Part 3. Refer to AT- 5 7 , AT- 6 0 , AT- 6 1 .

Before beginning the road test, check the test procedure and inspection items.

Test all inspection items until the symptom is uncovered. Diagnose NG items when all road tests are
complete.
Judgement Possible cause
Idle speedLow for all positions
(P, R, N, D, M)Possible causes include malfunctions in the pressure supply system and low oil pump output.
For example

Oil pump wear

Pressure regulator valve or plug sticking or spring fatigue

Oil strainer
oil pump
pressure regulator valve passage oil leak

Engine idle speed too low
Only low for a spe-
cific positionPossible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.
HighPossible causes include a sensor malfunction or malfunction in the line pressure adjustment func-
tion.
For example

Accelerator pedal position signal malfunction

ATF temperature sensor malfunction

Line pressure solenoid malfunction (sticking in “OFF” state, filter clog, cut line)

Pressure regulator valve or plug sticking
Stall speedOil pressure does
not rise higher than
the oil pressure for
idle.Possible causes include a sensor malfunction or malfunction in the pressure adjustment function.
For example

Accelerator pedal position signal malfunction

TCM breakdown

Line pressure solenoid malfunction (shorting, sticking in“ ON” state)

Pressure regulator valve or plug sticking

Pilot valve sticking or pilot filter clogged
The pressure rises,
but does not enter
the standard posi-
tion.Possible causes include malfunctions in the pressure supply system and malfunction in the pres-
sure adjustment function.
For example

Accelerator pedal position signal malfunction

Line pressure solenoid malfunction (sticking, filter clog)

Pressure regulator valve or plug sticking

Pilot valve sticking or pilot filter clogged
Only low for a spe-
cific positionPossible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual valve.

TROUBLE DIAGNOSIS
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Revision: 2004 November 2004 FX35/FX45
Cruise Test - Part 1ACS007AA
1. CHECK STARTING OUT FROM D1
1. Drive the vehicle for about 10 minutes to warm up the engine oil and A/T fluid.
Appropriate temperature for the A/T fluid: 50 - 80°C (122 - 176°F)
2. Park the vehicle on a level surface.
3. Move selector lever to “P” position.
4. Start the engine.
5. Move selector lever to “D” position.
6. Press the accelerator pedal about half way down to accelerate the vehicle.
With CONSULT-II
Read off the gear positions. Refer to AT- 9 7 , "
DATA MONITOR MODE" .
Start from D1?
YES >> GO TO 2.
NO >> Enter a check mark at “Vehicle Cannot Be Started From D1” on the diagnostics worksheet AT- 4 6
,
then continue the road test.
2. CHECK SHIFT UP D1 → D2
Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D1 → D2) at the appropri-
ate speed.

Refer to AT- 6 2 , "Vehicle Speed When Shifting Gears" .
With CONSULT-II
Read the gear position, throttle opening, and vehicle speed. Refer to AT- 9 7 , "
DATA MONITOR MODE" .
Does the A/T shift up D1
→ D2 at the correct speed?
YES >> GO TO 3.
NO >> Enter a check mark at “A/T Does Not Shift:D1 → D2” on the diagnostics worksheet AT- 4 6
, then
continue the road test.
3. CHECK SHIFT UP D2 → D3
Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D2 → D3) at the appropri-
ate speed.

Refer to AT- 6 2 , "Vehicle Speed When Shifting Gears" .
With CONSULT-II
Read the gear position, throttle opening, and vehicle speed. Refer to AT- 9 7 , "
DATA MONITOR MODE" .
Does the A/T shift up D2
→ D3 at the correct speed?
YES >> GO TO 4.
NO >> Enter a check mark at “A/T Does Not Shift:D2 → D3” on the diagnostics worksheet AT- 4 6
, then
continue the road test.
4. CHECK SHIFT UP D3 → D4
Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D3 → D4) at the appropri-
ate speed.

Refer to AT- 6 2 , "Vehicle Speed When Shifting Gears" .
With CONSULT-II
Read the gear position, throttle opening, and vehicle speed. Refer to Data AT- 9 7 , "
DATA MONITOR MODE" .
Does the A/T shift up D3
→ D4 at the correct speed?
YES >> GO TO 5.
NO >> Enter a check mark at “A/T Does Not Shift:D3 → D4” on the diagnostics worksheet AT- 4 6
, then
continue the road test.

TROUBLE DIAGNOSIS
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Revision: 2004 November 2004 FX35/FX45
23
Slips/Will
Not
EngageVehicle cannot be
started from D
1 .
Refer to AT-203,
"Vehicle Cannot Be
Started From D1" .ON vehicle1. Fluid level and stateAT- 5 1
2. Accelerator pedal position sensorAT-136
3. Line pressure testAT- 5 2
4. CAN communication lineAT-105
5. Control valve with TCMAT-242
OFF vehicle6. Torque converterAT-286
7. Oil pump assemblyAT-303
8. 3rd one-way clutchAT-306
9. 1st one-way clutch AT-314
10. Gear systemAT-274
11. Reverse brakeAT-286
12. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 7 , "
Cross-Sectional View (2WD Models)" or AT- 1 8 ,
"Cross-Sectional View (AWD Models)" )AT-286
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-Sectional View (2WD Models)" or AT-18, "Cross-
Sectional View (AWD Models)" )AT-286
24Does not lock-up.
Refer to AT-216, "A/T
Does Not Perform
Lock-up" .ON vehicle1. Fluid level and stateAT- 5 1
2. Line pressure testAT- 5 2
3. Engine speed signalAT-121
4. Turbine revolution sensorAT-143
5. Torque converter clutch solenoid valveAT-123
6. CAN communication lineAT-105
7. Control valve with TCMAT-242
OFF vehicle8. Torque converterAT-2869. Oil pump assemblyAT-303
25Does not hold lock-up
condition.
Refer to AT-218, "A/T
Does Not Hold Lock-
up Condition" .ON vehicle1. Fluid level and stateAT- 5 1
2. Line pressure testAT- 5 2
3. Engine speed signalAT-121
4. Turbine revolution sensorAT-143
5. Torque converter clutch solenoid valveAT-123
6. CAN communication lineAT-105
7. Control valve with TCMAT-242
OFF vehicle8. Torque converterAT-2869. Oil pump assemblyAT-303
No. Items Symptom Condition Diagnostic ItemReference
page

AT-74
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
26
Slips/Will
Not
engageLock-up is not
released.
Refer to AT-220,
"Lock-up Is Not
Released" .ON vehicle1. Fluid level and stateAT- 5 1
2. Line pressure testAT- 5 2
3. Engine speed signalAT- 1 2 1
4. Turbine revolution sensorAT- 1 4 3
5. Torque converter clutch solenoid valveAT- 1 2 3
6. CAN communication lineAT- 1 0 5
7. Control valve with TCMAT- 2 4 2
OFF vehicle8. Torque converterAT- 2 8 69. Oil pump assemblyAT- 3 0 3
27No shock at all or the
clutch slips when
vehicle changes
speed D
1 → D2 or
M
1 → M2 . ON vehicle1. Fluid level and stateAT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 11 6,
AT- 1 4 5
3. ATF pressure switch 5 and direct clutch solenoid valveAT- 1 8 2,
AT- 1 6 0
4. CAN communication lineAT- 1 0 5
5. Line pressure testAT- 5 2
6. Control valve with TCMAT- 2 4 2
OFF vehicle7. Torque converterAT- 2 8 6
8. Oil pump assemblyAT- 3 0 3
9. 3rd one-way clutchAT- 3 0 6
10. Gear systemAT- 2 7 4
11. Direct clutchAT- 3 2 3
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-Sectional View (2WD Models)" or AT- 1 8 , "Cross-
Sectional View (AWD Models)" )AT- 2 8 6
No. Items Symptom Condition Diagnostic ItemReference
page

AT-76
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
30
Slips/Will
Not
engageNo shock at all or the
clutch slips when
vehicle changes
speed D
4 → D5 or
M
4 → M5 .ON vehicle1. Fluid level and stateAT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 11 6,
AT- 1 4 5
3. ATF pressure switch 1 and front brake solenoid valveAT- 1 7 8,
AT- 1 5 6
4. ATF pressure switch 5 and direct clutch solenoid valveAT- 1 8 2,
AT- 1 6 0
5. CAN communication lineAT- 1 0 5
6. Line pressure testAT- 5 2
7. Control valve with TCMAT- 2 4 2
OFF vehicle8. Torque converterAT- 2 8 6
9. Oil pump assemblyAT- 3 0 3
10. Front brake (brake band)AT- 2 8 6
11. Input clutchAT- 3 0 8
12. Gear systemAT- 2 7 4
13. High and low reverse clutchAT- 3 2 0
31When you press the
accelerator pedal and
shift speed D5 → D4
or M
5 → M4 the
engine idles or the
transmission slips.ON vehicle1. Fluid level and stateAT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 11 6,
AT- 1 4 5
3. ATF pressure switch 1 and front brake solenoid valveAT- 1 7 8,
AT- 1 5 6
4. ATF pressure switch 5 and direct clutch solenoid valveAT- 1 8 2,
AT- 1 6 0
5. CAN communication lineAT- 1 0 5
6. Line pressure testAT- 5 2
7. Control valve with TCMAT- 2 4 2
OFF vehicle8. Torque converterAT- 2 8 6
9. Oil pump assemblyAT- 3 0 3
10. Input clutchAT- 3 0 8
11. Gear systemAT- 2 7 4
12. High and low reverse clutchAT- 3 2 0
13. Direct clutchAT- 3 2 3
No. Items Symptom Condition Diagnostic ItemReference
page