Nissan Altima L32. Instruction — part 1484

TM-280

< FUNCTION DIAGNOSIS >

[CVT: RE0F10A]

HYDRAULIC CONTROL SYSTEM

EXCEPT TRANSAXLE ASSEMBLY

Name

Function

Torque converter regulator valve

Optimizes the supply pressure for the torque converter depending on driving conditions.

Pressure regulator valve

Optimizes the discharge pressure from the oil pump depending on driving conditions.

TCC control valve

• Activates or deactivate the lock-up.
• Lock-up smoothly by opening lock-up operation excessively.

TCC solenoid valve

TM-327

Shift control valve

Controls flow-in/out of line pressure from the primary pulley depending on the stroke dif-
ference between the stepping motor and the primary pulley.

Secondary valve

Controls the line pressure from the secondary pulley depending on operating conditions.

Clutch regulator valve

Adjusts the clutch operating pressure depending on operating conditions.

Secondary pressure solenoid valve

TM-336

Line pressure solenoid valve

TM-329

Step motor

TM-361

Instruction valve

Transmits the clutch operating pressure to each circuit in accordance with the selected
position.

Select control valve

Engages forward clutch, reverse brake smoothly depending on select operation.

Select switch valve

Switches torque converter clutch solenoid valve control pressure use to torque converter
clutch control valve or select control valve.

Lock-up select solenoid valve

TM-358

Primary speed sensor

TM-313

Secondary speed sensor

TM-318

PNP switch

TM-313

Primary pulley

TM-275

Secondary pulley

Forward clutch

Torque converter

Name

Function

TCM

Judges the vehicle driving status according to the signal from each sensor and controls
the non-step transmission mechanism properly.

Accelerator pedal position sensor

TM-352

CONTROL SYSTEM

TM-281

< FUNCTION DIAGNOSIS >

[CVT: RE0F10A]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

CONTROL SYSTEM

System Diagram

INFOID:0000000004201840

System Description

INFOID:0000000004201841

The CVT senses vehicle operating conditions through various sensors. It always controls the optimum shift

position and reduces shifting and lock-up shocks.

TCM FUNCTION

The function of the TCM is to:

• Receive input signals sent from various switches and sensors.

• Determine required line pressure, shifting point, and lock-up operation.

• Send required output signals to the step motor and the respective solenoids.

*: Without instruction mode.

INPUT/OUTPUT SIGNAL OF TCM

AWDIA0630GB

SENSORS (or SIGNAL)

⇒

TCM

⇒

ACTUATORS

PNP switch
Accelerator pedal position signal
Closed throttle position signal
Engine speed signal
CVT fluid temperature sensor
Vehicle speed signal
Instruction mode signal
Stop lamp switch signal
Primary speed sensor
Secondary speed sensor
Secondary pressure sensor

Shift control
Line pressure control
Primary pressure control
Secondary pressure control
Lock-up control
Engine brake control
Vehicle speed control
Fail-safe control
Self-diagnosis
CONSULT-III communication line
Duet-EA control
CAN system
On board diagnosis

Step motor
Torque converter clutch solenoid
valve
Lock-up select solenoid valve
Line pressure solenoid valve
Secondary pressure solenoid valve
Instruction mode indicator
Shift position indicator
CVT indicator lamp
Starter relay

TM-282

< FUNCTION DIAGNOSIS >

[CVT: RE0F10A]

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 control

Lock-up

control

CAN com-

munication

control

Fail-safe

function

(

*

2)

Input

PNP 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

Secondary pressure sensor

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-283

< 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:0000000004201842

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