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Nissan Versa Sedan. Manual - part 856

TM-330

< BASIC INSPECTION >

[CVT: RE0F11A]

CVT FLUID COOLER SYSTEM

17. Perform “CVT FLUID COOLER DIAGNOSIS PROCEDURE”.

CVT FLUID COOLER DIAGNOSIS PROCEDURE

NOTE:

Insufficient cleaning of the cooler inlet hose exterior may lead to inaccurate debris identification.
1. Position an oil pan under the transaxle's inlet and outlet cooler hoses.
2. Clean the exterior and tip of the cooler inlet hose.
3. Insert the extension adapter hose of a can of Transmission

Cooler Cleaner (Nissan P/N 999MP-AM006) into the cooler out-

let hose.

CAUTION:

• Wear safety glasses and rubber gloves when spraying the

Transmission Cooler Cleaner.

• Spray Transmission Cooler Cleaner only with adequate

ventilation.

• Avoid contact with eyes and skin.

• Never breath vapors or spray mist.

4. Hold the hose and can as high as possible and spray Transmis-

sion Cooler Cleaner in a continuous stream into the cooler outlet

hose until CVT fluid flows out of the cooler inlet hose for 5 seconds.

5. Tie a common white, basket-type coffee filter to the end of the

cooler inlet hose.

6. Insert the tip of an air gun into the end of the cooler outlet hose.
7. Wrap a shop rag around the air gun tip and end of cooler outlet

hose.

8. Blow compressed air regulated to 5 to 9 kg/cm

(70 to 130 psi)

through the cooler outlet hose to force any remaining CVT fluid

into the coffee filter.

9. Remove the coffee filter from the end of the cooler inlet hose.
10. Perform “CVT FLUID COOLER INSPECTION PROCEDURE”.

CVT FLUID COOLER INSPECTION PROCEDURE

1. Inspect the coffee filter for debris.
a. If small metal debris less than 1 mm (0.040 in) in size or metal

powder is found in the coffee filter, this is normal. If normal

debris is found, the CVT fluid cooler/radiator can be reused and

the procedure is ended.

SCIA4421E

SCIA4424E

SCIA4425E

SCIA2967E

CVT FLUID COOLER SYSTEM

TM-331

< BASIC INSPECTION >

[CVT: RE0F11A]

b. If one or more pieces of debris are found that are over 1 mm

(0.040 in) in size and/or peeled clutch facing material is found in

the coffee filter, the fluid cooler is not serviceable. The radiator/

fluid cooler must be replaced and the inspection procedure is

ended.

CVT FLUID COOLER FINAL INSPECTION

After performing all procedures, ensure that all remaining oil is cleaned from all components.

SCIA7031E

TM-332

< BASIC INSPECTION >

[CVT: RE0F11A]

STALL TEST

STALL TEST

Work Procedure

INFOID:0000000009268119

INSPECTION

1. Check the engine oil level. Replenish if necessary.
2. Check for leak of the CVT fluid. Refer to

TM-426, "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:

Do not 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-456, "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-333

< BASIC INSPECTION >

[CVT: RE0F11A]

LINE PRESSURE TEST

Work Procedure

INFOID:0000000009268120

INSPECTION

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

LU-8, "Inspection"

2. Check for CVT fluid leaks. Refer to

TM-426, "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. Stop the vehicle, 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

TM-456, "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.

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