Nissan Maxima. Instruction — part 1140

TM-24

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

CONTROL SYSTEM

• *1: Input by CAN communications.
• *2: If these input and output signals are different, the TCM triggers the fail-safe function.

Control item

Fluid

pressure

control

Select con-

trol

Shift con-

trol

Lock-up

control

CAN com-

munica-

tion control

Fail-safe

function

*2

Input

Transmission range switch

X

X

X

X

X

X

Accelerator pedal position signal

*1

X

X

X

X

X

X

Closed throttle position signal

*1

X

X

X

X

Engine speed signal

*1

X

X

X

X

X

CVT fluid temperature sensor

X

X

X

X

X

Instruction mode signal

*1

X

X

X

X

X

Stop lamp switch signal

*1

X

X

X

X

Primary speed sensor

X

X

X

X

X

Secondary speed sensor

X

X

X

X

X

X

Primary pressure sensor

X

X

Secondary pressure sensor

X

X

X

TCM power supply voltage signal

X

X

X

X

X

X

Output

Step motor

X

X

TCC solenoid valve

X

X

X

Lock-up select solenoid valve

X

X

X

Line pressure solenoid valve

X

X

X

X

Secondary pressure solenoid valve

X

X

X

CONTROL SYSTEM

TM-25

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Component Parts Location

INFOID:0000000009469028

1.

CVT shift selector assembly (Instruction
mode select switch and instruction
mode position select switch)

2.

Secondary speed sensor

3.

CVT unit harness connector

AWDIA1036ZZ

TM-26

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

CONTROL SYSTEM

Component Description

INFOID:0000000010113441

TRANSAXLE ASSEMBLY

EXCEPT TRANSAXLE ASSEMBLY

4.

TCM

5.

Accelerator pedal position (APP)
sensor

6.

Stop lamp switch

7.

Shift positioner indicator
Instruction mode indicator
DS mode indicator

8.

Paddle shifters

Name

Function

Transmission range switch

TM-50

CVT fluid temperature sensor

TM-53

Primary speed sensor

TM-57

Secondary speed sensor

TM-60

Primary pressure sensor

TM-90

Secondary pressure sensor

TM-85

Step motor

TM-109

TCC solenoid valve

TM-67

Lock-up select solenoid valve

TM-106

Line pressure solenoid valve

TM-71

Secondary pressure solenoid valve

TM-77

Name

Function

TCM

TM-22

Stop lamp switch

TM-47

LOCK-UP AND SELECT CONTROL SYSTEM

TM-27

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

LOCK-UP AND SELECT CONTROL SYSTEM

System Diagram

INFOID:0000000010113442

System Description

INFOID:0000000010113443

• 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 valve 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 valve 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 valve 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.

AWDIA0740GB

JPDIA0312GB