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Nissan Sentra. Manual - part 878

TM-148

< BASIC INSPECTION >

[CVT: RE0F11A]

STALL TEST

STALL TEST

Work Procedure

INFOID:0000000009759378

INSPECTION

1. Check the engine oil level. Replenish if necessary. Refer to

LU-7, "Inspection"

2. Check for leak of the CVT fluid. Refer to

TM-250, "Inspection"

3. Drive for about 10 minutes to warm up the vehicle so that the CVT fluid temperature is 50 to 80

°C (122 to

176

°F).

4. Be sure to apply the parking brake and block the tires.
5. Start the engine, depress the brake pedal and put the selector lever to the D position.
6. While depressing the brake pedal, depress the accelerator pedal gradually.
7. Read the stall speed quickly. Then, release your foot from the accelerator pedal quickly.

CAUTION:

Never depress the accelerator pedal for 5 seconds or more during the test.

8. Place the selector lever in the N position.
9. Cool the CVT fluid.

CAUTION:

Run the engine with the idle speed for at least 1 minute.

10. Put the selector lever to the R position and perform Step 6 to Step 9 again.

NARROWING-DOWN MALFUNCTIONING PARTS

O: Within the stall speed standard value
H: Stall speed is higher than the standard value.
L: Stall speed is lower than the standard value.

Stall speed

: Refer to

TM-288, "Stall Speed"

Selector lever position

Possible cause

Stall speed

• Low brake

• Reverse brake

• Engine
• Torque converter one way clutch

• Line pressure is low.
• Primary pulley
• Secondary pulley
• Steel belt

LINE PRESSURE TEST

TM-149

< BASIC INSPECTION >

[CVT: RE0F11A]

LINE PRESSURE TEST

Work Procedure

INFOID:0000000009759379

INSPECTION

1. Check the engine oil level. Replenish if necessary.

LU-7, "Inspection"

2. Check for leak of the CVT fluid. Refer to

TM-250, "Inspection"

3. Drive for about 10 minutes to warm up the vehicle so that the CVT fluid temperature is 50 to 80

°C (122 to

176

°F).

4. Be sure to apply the parking brake and block the tires.
5. Start the engine.
6. Select “Data Monitor” in “TRANSMISSION”.
7. Select “LINE PRESSURE”.
8. Measure the line pressure at both idle and the stall speed.

CAUTION:

Keep brake pedal pressed all the way down during measurement.

NARROWING-DOWN MALFUNCTIONING PARTS

Line pressure

: Refer to

TM-289, "Line Pressure"

Judgment Possible

cause

Idle speed

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

Possible causes include malfunctions in the pressure supply system and low oil pump output.
For example
• Oil pump wear
• Damage of chain and sprocket
• 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 specific
position

Possible causes include an oil pressure leak in a passage or device related to the position after
the pressure is distributed by the manual 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
• 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 func-
tion.
For example
• TCM malfunction
• Line pressure solenoid malfunction (shorting, sticking in ON state)
• Pressure regulator valve or plug sticking

The pressure rises, but
does not enter the
standard position.

Possible causes include malfunctions in the pressure supply system and malfunction in the pres-
sure adjustment function.
For example
• Oil pump wear
• Line pressure solenoid malfunction (sticking, filter clog)
• Pressure regulator valve or plug sticking

Only low for a specific
position

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

TM-150

< BASIC INSPECTION >

[CVT: RE0F11A]

CVT POSITION

CVT POSITION

Inspection

INFOID:0000000009759380

INSPECTION

1. Turn ON the ignition switch with the shift selector at the “P” position.
2. Press the shift selector button with the brake pedal depressed, and confirm that the shift selector can be

moved to positions other than “P”. Also confirm that movement is not allowed from the “P” position to other

position without depressing the brake pedal.

3. Move the shift selector and check for “excessive effort”, “sticking”, “noise” or “rattle”.
4. Confirm that shift selector stops at each position with the feel of engagement when it is moved through all

the positions. Check whether or not the actual position the shift selector is in matches the position shown

by the transaxle body.

5. Make sure that the shift selector is moved to all the shift posi-

tions in the manner shown.

• (A): Press shift selector button to operate shift selector, while

depressing the brake pedal.

• (B): Press shift selector button to operate shift selector.

• (C): Shift selector can be operated without pressing the shift

selector button.

6. When the shift selector button is pressed without applying for-

ward/backward force to the shift selector at “P”, “R”, “N”, “D” or

“Ds” positions, there should be no “sticking” on the shift selector

button operation.

7. Check that the back-up lamps do not illuminate when the shift

selector is in the “P” position.

8. Check that the engine can be started with the shift selector in the “P” and “N” positions only.
9. Check that the transaxle is locked completely when the shift selector is in the “P” position.

Adjustment

INFOID:0000000009759381

ADJUSTMENT

1. Shift the selector lever to the “P” position.

CAUTION:

Rotate the wheels at least a quarter turn and be certain the Park position mechanism is fully

engaged.

2. Remove nut (A) and set manual lever (B) to the “P” position.

CAUTION:

Do not apply force to the manual lever.

3. Tighten nuts to the specified torque. Refer to

TM-256, "Exploded