Nissan Sentra B18 (2020-2025) Service Manual: Cvt Fluid Temperature Sensor

Nissan Sentra B18 (2020-2025) Service Manual / Transmission & Driveline / Transaxle & Transmission :: Cvt: Re0f15a / Unit Disassembly and Assembly / Cvt Fluid Temperature Sensor

Exploded View

Exploded View

Transaxle assembly	Reduction gear assembly	Differential assembly
Baffle plate C	Converter housing	Differential side oil seal
Torque converter	Converter housing oil seal	O-ring
CVT oil warmer	Control valve cover	Clip
Control valve cover gasket	CVT fluid temperature sensor	O-ring
O-ring	Primary speed sensor	Differential side oil seal
Converter housing installation surface of the transaxle case
: Always replace after every disassembly.
: N·m (kg-m, ft-lb)
: N·m (kg-m, in-lb)
: Apply CVT fluid
: Apply petroleum jelly
: Apply Loctite 5460 or equivalent

Disassembly and Assembly

Disassembly and Assembly

DISASSEMBLY

Remove the drain plug from transaxle case and then drain the CVT fluid. Refer to Removal and Installation.

Remove the transaxle assembly from the Nissan Sentra vehicle. Refer to Removal and Installation.

Remove drain plug O-ring.

Maintain the same posture as on the Nissan Sentra vehicle. Note:

Use plastic or wood blocks to stabilize the transaxle assembly on the work bench if needed.

Remove torque converter from transaxle assembly. Note:

Wipe out remaining CVT fluid in torque converter.

CAUTION:

While removing torque converter, never damage the bush in the sleeve of torque converter.

Completely drain CVT fluid from torque converter by tilting right and left several times until no fluid coming out.

Remove the CVT oil warmer mounting bolts and then remove CVT oil warmer .

Remove O-rings from CVT oil warmer.

Remove primary speed sensor mounting bolt and then remove primary speed sensor .

Remove O-ring from primary speed sensor.

Remove differential side oil seal from transaxle assembly.

Place transaxle assembly with the converter housing side as the top.

Remove the control valve cover mounting bolts ( 15 pieces) and then remove control valve cover .

Remove clip from terminal assembly.

Remove the terminal assembly from control valve cover.

CAUTION:

Never disconnect the connector of the terminal assembly.

When the connector is disconnected, replacement with new control valve assembly is required.　

Remove O-ring from terminal assembly.

Remove the control valve cover gasket .

Disconnect CVT fluid temperature sensor harness connector .

Remove the CVT fluid sensor harness according to the following procedure.

Remove harness from the notch of the control valve plate.
Remove harness from between the bolt and the bracket .

Remove converter housing mounting bolts ( 20 pieces).

Remove converter housing by applying slide hammer [SST: KV315J0610 (NI-25721-A)], slide hammer nut and bolt kit [SST: KV315J0630 (NI-50255-UPD)] and J hook case separator [SST: KV315J0620 (NI-51923)] to three positions with arrow marks ().

Remove mounting bolts ( 3 pieces) and then remove the baffle plate C from the converter housing.

Remove differential side oil seal from converter housing using a suitable tool (A).

Remove converter housing oil seal from converter housing using a suitable tool (A).

Remove reduction gear assembly and differential assembly together.

CAUTION:

Handle parts with care. Never reuse damaged parts, if dropped.

Remove harness clips .

CAUTION:

Do not cut the clip or pull it out forcefully, but pull it out by pinching its claw.

Note:

Use pliers with curved ends for easy work.

Disconnect the harness connector from the input speed sensor.

Remove CVT fluid temperature sensor from the oil strainer.

Thoroughly clean the mating surfaces of the transaxle case and torque converter housing. Note:

A plastic scraper can be used.
Remove the old sealant from the mating surfaces.

CAUTION:

Never use sanding discs, similar abrasive tools, or metal blades.

Use parts cleaner or equivalent solvent and lint-free paper only.

Make sure the parts cleaner or solvents used are compatible with local regulations.

Prevent debris from entering in the transaxle assembly.

ASSEMBLY

Fix the CVT fluid temperature sensor body to the oil strainer by the clip . Note:

Fix the CVT fluid temperature sensor at the center notch of three notches on the CVT temperature sensor body.

Place the CVT fluid temperature sensor harness with the following procedure.

: Put the harness into the control valve room through the opening of transaxle case.
: The harness shall be placed between the dummy cover and the manual shaft retaining pin.
: The harness shall be placed between the dummy cover and the transaxle case.

CAUTION:

The harness shall not be placed on the bolts.
: The harness shall be placed between the bolt and the dummy cover.
: The harness shall be placed between guide walls on the dummy cover.

Install reduction gear assembly and differential assembly together.

CAUTION:

Handle parts with care. Never reuse damaged parts, if dropped.

Install baffle plate C to the converter housing and then tighten baffle plate C mounting bolts ( 3 pieces) to the specified torque. Refer to Exploded View.

CAUTION:

Never reuse baffle plate C.

Apply Loctite 5460 or equivalent on the converter housing installation surface of the transaxle case.

CAUTION:

Completely remove all moisture, oil and old sealant, etc. from the transaxle case and converter housing mounting surfaces.

The sealant width is 2 - 3 mm (0.08 - 0.12 in).

Check that the starting point and the ending point are about the middle between the bolts. The overlap both ends of the bead by 25 - 30 mm (0.98 - 1.18 in).

Install converter housing.

CAUTION:

Completely remove all moisture, oil and old sealant, etc. from the transaxle case and converter housing mounting surfaces.

Tighten converter housing mounting bolts to the specified torque in numerical order shown in the figure. Refer to Exploded View. Note:

Apply CVT fluid to the bolts when installing.

CAUTION:

Never reuse the converter housing mounting bolts.

Place the CVT fluid temperature sensor harness with the following procedure.

The harness shall pass through the notch of the plate of control valve.
The harness shall pass through between the bolt and the bracket on the control valve.

Connect CVT fluid temperature sensor harness connector .

Install control valve cover gasket .

CAUTION:

Never reuse the control valve cover gasket.

Install O-ring to terminal assembly.

CAUTION:

Never reuse the O-ring.

Apply CVT fluid to the O-ring.

Install the terminal assembly to control valve cover. Note:

Turn the terminal assembly until its locator touches the control valve cover .

Install clip to terminal assembly.

Install the control valve cover. Note:

The control valve harness must be wired as shown figure.

CAUTION:

Be secure that the harness is not twisted unnecessarily.

Tighten control valve cover mounting bolts to the specified torque in numerical order shown in the figure. Refer to Exploded View.

CAUTION:

Apply CVT fluid to the bolts when installing.

Install O-ring to drain plug.

CAUTION:

Never reuse the O-ring.

Apply CVT fluid to the O-ring.

Install drain plug and then tighten drain plug to the specified torque. Refer to Exploded View.

Maintain the same posture as on the Nissan Sentra vehicle.

Install each differential side oil seal evenly using following tools.

CAUTION:

Never reuse differential side oil seals.

Apply CVT fluid to differential side oil seals.

Tools to be used:

Location	Special Service Tools
Converter housing side	Output seal installer (torque converter side) [SST: KV31500900 (NI-52284)] Driver handle [SST: ST35325000 (NI-8092)]
Transaxle case side	Output seal installer (case side) [SST: KV31500800 (NI-52283)] Driver handle [SST: ST35325000 (NI-8092)]

Install differential side oil seal with seal installer until it is flush.

Height or depth (A) of differential side oil seal from the converter housing surface

: 2.2±0.5 mm (0.087±0.020 in)

Height or depth (A) of differential side oil seal from the transaxle case surface

: 1.8±0.5 mm (0.071±0.020 in)

Install O-ring to primary speed sensor.

CAUTION:

Never reuse the O-ring.

Apply CVT fluid to the O-ring.

Install primary speed sensor and then tighten primary speed sensor mounting bolt to the specified tightening torque. Refer to Exploded View.

Install O-rings to CVT oil warmer.

CAUTION:

Never reuse the O-rings.

Apply petroleum jelly to the O-rings.

Install CVT oil warmer to converter housing and then tighten CVT oil warmer mounting bolts to the specified torque. Refer to Exploded View.

Install the new converter housing oil seal. Refer to Disassembly and Assembly.

Install torque converter to transaxle assembly. Refer to Disassembly and Assembly.

Install the transaxle assembly to the Nissan Sentra vehicle. Refer to Removal and Installation.

Fill the CVT fluid. Refer to Refilling.

Torque Converter and Converter Housing Oil Seal

Exploded View Exploded View Torque converter ...

Input Speed Sensor

Exploded View Exploded View Transaxle assembly ...

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