2004 INFINITI FX35 Service Manual

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Page 129 of 4449

INFINITI FX35 2004 Service Manual 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 spee

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INFINITI FX35 2004 Service Manual 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-343

Page 131 of 4449

INFINITI FX35 2004 Service Manual 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 malfu

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.

Page 132 of 4449

INFINITI FX35 2004 Service Manual TROUBLE DIAGNOSIS
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Check Before Engine is StartedACS007A8
1. CHECK A/T CHECK INDICATOR LAMP
1. Park vehicle on level surface.
2. M

TROUBLE DIAGNOSIS
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Check Before Engine is StartedACS007A8
1. CHECK A/T CHECK INDICATOR LAMP
1. Park vehicle on level surface.
2. Move selector lever to “P” position.
3. Turn ignition switch “OFF” and wait at least 10 seconds.
4. Turn ignition switch “ON”. (Do not start engine.)
Does A/T CHECK indicator lamp light up for about 2 seconds?
YES >> GO TO 2.
NO >> Stop the road test and go to AT- 1 9 1 , "
A/T CHECK Indicator Lamp Does Not Come On" .
2. CHECK A/T CHECK INDICATOR LAMP
Does A/T CHECK indicator lamp flash for about 8 seconds?
YES >> For TCM fail-safe mode, carry out self-diagnostics and record all NG items on the diagnostics
worksheet. Refer to AT- 9 4
, AT- 1 0 3 .
NO >> 1. Turn ignition switch “OFF”.
2. Carry out the self-diagnostics and record all NG items on the diagnostics worksheet. Refer to
AT- 9 4
, AT- 1 0 3 .
3. Go to AT- 5 5 , "
Check at Idle" .
Check at Idle ACS007A9
1. CHECK STARTING THE ENGINE
1. Park vehicle on level surface.
2. Move selector lever to “P” or “N” position.
3. Turn ignition switch “OFF”.
4. Turn ignition switch “START”.
Does the engine start?
YES >> GO TO 2.
NO >> Stop the road test and go to AT- 1 9 3 , "
Engine Cannot Be Started In “P” or “N” Position" .
2. CHECK STARTING THE ENGINE
1. Turn ignition switch “ON”. (Do not start engine.)
2. Move selector lever in “D”, “M” or “R” position.
3. Turn ignition switch “START”.
Does the engine start in either position?
YES >> Stop the road test and go to AT- 1 9 3 , "Engine Cannot Be Started In “P” or “N” Position" .
NO >> GO TO 3.
3. CHECK “P” POSITION FUNCTIONS
1. Move selector lever to “P” position.
2. Turn ignition switch “OFF”.
3. Release the parking brake.
4. Push the vehicle forward or backward.
5. Engage the parking brake.
When you push the vehicle with disengaging the parking brake, does it move?
YES >> Enter a check mark at “In “P” position, Vehicle Moves When Pushed” on the diagnostics work-
sheet AT- 4 6
, then continue the road test.
NO >> GO TO 4.

Page 133 of 4449

INFINITI FX35 2004 Service Manual AT-56
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
4. CHECK “N” POSITION FUNCTIONS
1. Start the engine.
2. Move selector lever to “N” position.
3. Release the parking brake.
Does v

Page 134 of 4449

INFINITI FX35 2004 Service Manual 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

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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.

Page 135 of 4449

INFINITI FX35 2004 Service Manual AT-58
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
5. CHECK SHIFT UP D4 → D5
Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D4 → D5) at the appro

Page 136 of 4449

INFINITI FX35 2004 Service Manual TROUBLE DIAGNOSIS
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Revision: 2004 November 2004 FX35/FX45
9. CHECK SHIFT DOWN D5 → D4
Decelerate by pressing lightly on the brake pedal.
With CONSULT-II
Read the gear

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