Nissan Altima L32. Instruction — part 1520

TM-424

< ON-VEHICLE MAINTENANCE >

[CVT: RE0F10A]

LINE PRESSURE TEST

JUDGMENT

.

Judgment Possible

cause

Idle speed

Low for all positions
(“P”, “R”, “N”, “D”)

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 position

Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the instruction valve.

High

Possible causes include a sensor malfunction or malfunction in the line pressure adjustment
function.
For example
• Accelerator pedal position signal malfunction
• CVT fluid temperature sensor malfunction
• Pressure control solenoid A (line pressure solenoid) malfunction (sticking in OFF state, filter

clog, cut line)

• Pressure regulator valve or plug sticking

Stall speed

Line pressure does
not rise higher than
the line pressure for
idle.

Possible causes include a sensor malfunction or malfunction in the pressure adjustment function.
For example
• Accelerator pedal position signal malfunction
• TCM malfunction
• Pressure control solenoid A (line pressure solenoid) malfunction (shorting, sticking in ON

state)

• Pressure regulator valve or plug sticking

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
• Pressure control solenoid A (line pressure solenoid) malfunction (sticking, filter clog)
• Pressure regulator valve or plug sticking

Only low for a spe-
cific position

Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the instruction valve.

ROAD TEST

TM-425

< ON-VEHICLE MAINTENANCE >

[CVT: RE0F10A]

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ROAD TEST

Description

INFOID:0000000004201997

DESCRIPTION

• The purpose of the test is to determine overall performance of CVT

and analyze causes of problems.

• The road test consists of the following three parts:
1. “Check Before Engine Is Started”

TM-425

.

2. “Check at Idle”

TM-426

.

3. “Cruise Test”

TM-427

.

• Before road test, familiarize yourself with all test procedures and

items to check.

• Perform tests on all items until specified symptom is found. Trou-

bleshoot items which check out No Good after road test.

CONSULT-III SETTING PROCEDURE

• Using CONSULT-III, perform a cruise test and record the result.

• Print the result and ensure that shifts and lock-ups take place as per Shift Schedule.
1. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
2. Touch “MAIN SIGNALS” to set recording condition.
3. See “Numerical Display”, “Barchart Display” or “Line Graph Display”.
4. Touch “START”.
5. When performing cruise test. Refer to

TM-427, "Cruise Test"

.

6. After finishing cruise test part, touch “RECORD”.
7. Touch “STORE”.
8. Touch “BACK”.
9. Touch “DISPLAY”.
10. Touch “PRINT”.
11. Check the monitor data printed out.

Check before Engine Is Started

INFOID:0000000004201998

1.

CHECK CVT INDICATOR LAMP

1. Park vehicle on flat surface.

2. Move selector lever to “P” position.

3. Turn ignition switch OFF. Wait at least 5 seconds.

4. Turn ignition switch ON. (Do not start engine.)
Does shift position indicator come on for about 2 seconds?

YES

>> 1. Turn ignition switch OFF.

2. Perform self-diagnosis and note NG items.

Refer to

TM-298, "CONSULT-III Function (TRANSMISSION)"

.

3. Go to

TM-426, "Check at Idle"

.

SAT786A

SAT496G

TM-426

< ON-VEHICLE MAINTENANCE >

[CVT: RE0F10A]

ROAD TEST

NO

>> Stop “Road Test”. Refer to

TM-400, "Symptom Table"

.

Check at Idle

INFOID:0000000004201999

1.

CHECK STARTING THE ENGINE

1. Park vehicle on flat surface.

2. Move selector lever to “P” or “N” position.

3. Turn ignition switch OFF.

4. Turn ignition switch to “START” position.
Is engine started?

YES

>> GO TO 2.

NO

>> Stop “Road Test”. Refer to

TM-400, "Symptom Table"

.

2.

CHECK STARTING THE ENGINE

1. Turn ignition switch ON.

2. Move selector lever to “D”, “M” or “R” position.

3. Turn ignition switch to “START” position.
Is engine started?

YES

>> Stop “Road Test”. Refer to

TM-400, "Symptom Table"

.

NO

>> GO TO 3.

3.

CHECK “P” POSITION FUNCTION

1. Move selector lever to “P” position.

2. Turn ignition switch OFF.

3. Release parking brake.

4. Push vehicle forward or backward.

5. Apply parking brake.
Does vehicle move when it is pushed forward or backward?

YES

>> Refer to

TM-400, "Symptom Table"

. Continue “Road Test”.

NO

>> GO TO 4.

4.

CHECK “N” POSITION FUNCTION

1. Start engine.

2. Move selector lever to “N” position.

3. Release parking brake.
Does vehicle move forward or backward?

YES

>> Refer to

TM-400, "Symptom Table"

. Continue “Road Test”.

NO

>> GO TO 5.

5.

CHECK SHIFT SHOCK

1. Apply foot brake.

2. Move selector lever to “R” position.
Is there large shock when changing from “N” to “R” position?

YES

>> Refer to

TM-400, "Symptom Table"

. Continue “Road Test”.

NO

>> GO TO 6.

6.

CHECK “R” POSITION FUNCTION

Release foot brake for several seconds.
Does vehicle creep backward when foot brake is released?

YES

>> GO TO 7.

NO

>> Refer to

TM-400, "Symptom Table"

. Continue “Road Test”.

7.

CHECK “D” POSITION FUNCTION

Move selector lever to “D” position and check if vehicle creeps forward.
Does vehicle creep forward in all positions?

YES

>> Go to

TM-427, "Cruise Test"

.

NO

>> Stop “Road Test”. Refer to

TM-400, "Symptom Table"

.

ROAD TEST

TM-427

< ON-VEHICLE MAINTENANCE >

[CVT: RE0F10A]

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Cruise Test

INFOID:0000000004202000

1.

CHECK VEHICLE SPEED WHEN SHIFTING GEARS — PART 1

1. Drive vehicle for approximately 10 minutes to warm engine oil and CVT fluid up to operating temperature.

2. Park vehicle on flat surface.

3. Move selector lever to “P” position.

4. Start engine.

5. Move selector lever to “D” position.

6. Accelerate vehicle to 2/8-way throttle depressing accelerator

pedal constantly.

Read vehicle speed and engine speed. Refer to

TM-451,

"Vehicle Speed When Shifting Gears"

.

OK or NG

OK

>> GO TO 2.

NG

>> Refer to

TM-400, "Symptom Table"

. Continue “Road

Test”.

2.

CHECK VEHICLE SPEED WHEN SHIFTING GEARS — PART 2

1. Park vehicle on flat surface.

2. Move selector lever to “D” position.

3. Accelerate vehicle to full depression depressing accelerator

pedal constantly.

Read vehicle speed and engine speed.Refer to

TM-451,

"Vehicle Speed When Shifting Gears"

.

OK or NG

OK

>> GO TO 3.

NG

>> Refer to

TM-400, "Symptom Table"

. Continue “Road

Test”.

3.

CHECK MANUAL MODE FUNCTION

Move to instruction mode from “D” position.
Does it switch to manual mode?

YES

>> GO TO 4.

NO

>> Refer to

TM-400, "Symptom Table"

. Continue “Road Test”.

4.

CHECK SHIFT-UP FUNCTION

During instruction mode driving, is upshift from M1

→ M2 → M3 → M4 → M5 → M6 performed?

Read the gear position. Refer to

TM-298, "CONSULT-III Function (TRANSMISSION)"

.

Is upshifting correctly performed?

YES

>> GO TO 5.

NO

>> Refer to

TM-400, "Symptom Table"

. Continue “Road Test”.

5.

CHECK SHIFT-DOWN FUNCTION

During instruction mode driving, is downshift from M6

→ M5 → M4 → M3 → M2 → M1 performed?

Read the gear position. Refer to

TM-298, "CONSULT-III Function (TRANSMISSION)"

.

Is downshifting correctly performed?

YES

>> GO TO 6.

NO

>> Refer to

TM-400, "Symptom Table"

. Continue “Road Test”.

CVT fluid operating temperature:

50 – 80

°C (122 – 176°F)

SCIA6644E

SCIA4366E