Nissan Altima L32. Instruction — part 1485

TM-284

< FUNCTION DIAGNOSIS >

[CVT: RE0F10A]

CONTROL SYSTEM

Component Parts Location - Sedan

INFOID:0000000004201843

Component Description

INFOID:0000000004201844

TRANSAXLE ASSEMBLY

1.

Control device assembly

2.

Accelerator pedal position sensor

3.

CVT unit harness connector

4.

Primary speed sensor

5.

Secondary speed sensor

6.

PNP switch

7.

TCM

8.

Battery

9.

Shift position indicator
Instruction mode indicator

AWIIA0002ZZ

CONTROL SYSTEM

TM-285

< FUNCTION DIAGNOSIS >

[CVT: RE0F10A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

EXCEPT TRANSAXLE ASSEMBLY

Name

Function

PNP switch

TM-307

CVT fluid temperature sensor

TM-310

Primary speed sensor

TM-313

Secondary speed sensor

TM-318

Secondary pressure sensor

TM-341

Step motor

TM-361

TCC solenoid valve

TM-324

Lock-up select solenoid valve

TM-358

Line pressure solenoid valve

TM-329

Secondary pressure solenoid valve

TM-333

Name

Function

TCM

Optimally controls continuously variable transmission system by judging driving condi-
tions based on signals from each sensor.

Stop lamp switch

TM-304

TM-286

< FUNCTION DIAGNOSIS >

[CVT: RE0F10A]

LOCK-UP AND SELECT CONTROL SYSTEM

LOCK-UP AND SELECT CONTROL SYSTEM

System Diagram

INFOID:0000000004201845

System Description

INFOID:0000000004201846

• The torque converter clutch piston in the torque converter is engaged to eliminate torque converter slip to

increase power transmission efficiency.

• The torque converter clutch control valve operation is controlled by the torque converter clutch solenoid

valve, which is controlled by a signal from TCM. The torque converter clutch control valve engages or

releases the torque converter clutch piston.

• When shifting between “N” (“P”)

⇔“D” (“R”), torque converter clutch solenoid controls engagement power of

forward clutch and reverse brake.

• The lock-up applied gear range was expanded by locking up the

torque converter at a lower vehicle speed than conventional CVT

models.

TORQUE CONVERTER CLUTCH AND SELECT CONTROL VALVE CONTROL

Lock-up Released

In the lock-up released state, the torque converter clutch control valve is set into the unlocked state by the

torque converter clutch solenoid and the lock-up apply pressure is drained.

In this way, the torque converter clutch piston is not coupled.

Lock-up Applied

In the lock-up applied state, the torque converter clutch control valve is set into the locked state by the torque

converter clutch solenoid and lock-up apply pressure is generated.

In this way, the torque converter clutch piston is pressed and coupled.

Select Control

When shifting between “N” (“P”)

⇔“D” (“R”), optimize the operating pressure on the basis of the throttle posi-

tion, the engine speed, and the secondary pulley (output) revolution speed to lessen the shift shock.

SCIA2374E

SCIA1958E

LOCK-UP AND SELECT CONTROL SYSTEM

TM-287

< FUNCTION DIAGNOSIS >

[CVT: RE0F10A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Component Parts Location - Coupe

INFOID:0000000004201847

1.

Control device assembly

2.

Accelerator pedal position sensor

3.

CVT unit harness connector

4.

Primary speed sensor

5.

Secondary speed sensor

6.

PNP switch

7.

TCM

8.

Battery

9.

Shift position indicator
Instruction mode indicator

AWDIA0167ZZ