Nissan Altima L32. Instruction — part 1438

TM-96

< FUNCTION DIAGNOSIS >

[CVT: RE0F09B]

MECHANICAL SYSTEM

Item

Function

Torque converter

The torque converter is the device that increases the engine
torque as well as the conventional A/T and transmits it to the tran-
saxle.

Oil pump

It is a parachoid type oil pump with the flow control valve directly
controlled by the engine. Discharged oil from oil pump is transmit-
ted to the control valve. It is used as the oil of primary and second-
ary pulley operation and the oil of clutch operation and the
lubricant for each part.

Planetary gear

Perform the transmission of drive power and the switching of for-
ward/backward movement.

Forward clucth

Reverse brake

Primary pulley

It is composed of a pair of pulleys (the groove width is changed
freely in the axial direction) and the steel belt (the steel star wheels
are placed continuously and the belt is guided with the multilayer
steel rings on both sides). The groove width changes according to
wrapping radius of steel belt and pulley from low status to over-
drive status continuously with non-step. It is controlled with the oil
pressures of primary pulley and secondary pulley.

Secondary pulley

Steel belt

Output gear

The drive power from the secondary pulley returns the decelera-
tion gears [primary deceleration (output gear/idler gear pair) and
secondary deceleration (reduction gear/final gear pair)]. It is trans-
mitted from differential to drive wheel.

Idler gear

Reduction gear

Final gear

Differential

Instruction shaft

The parking rod rotates the parking pole and the parking pole en-
gages with the parking gear when the instruction shaft is in P position.
As a result the parking gear and the output axis are fixed.

Parking rod

Parking pawl

Parking gear

HYDRAULIC CONTROL SYSTEM

TM-97

< FUNCTION DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

HYDRAULIC CONTROL SYSTEM

System Diagram

INFOID:0000000004201637

System Description

INFOID:0000000004201638

The hydraulic control mechanism consists of the oil pump directly driven by the engine, the hydraulic control

valve that controls line pressure and transmission, and the input signal line.

LINE PRESSURE AND SECONDARY PRESSURE CONTROL

• When an input torque signal equivalent to the engine drive force is sent from the ECM to the TCM, the TCM

controls the line pressure solenoid valve and secondary pressure solenoid valve.

JSDIA0094GB

TM-98

< FUNCTION DIAGNOSIS >

[CVT: RE0F09B]

HYDRAULIC CONTROL SYSTEM

• This line pressure solenoid controls the pressure regulator valve as the signal pressure and adjusts the pres-

sure of the operating oil discharged from the oil pump to the line pressure most appropriate to the driving

state. Secondary pressure is controlled by decreasing line pressure.

Nomal Control

Optimize the line pressure and secondary pressure, depending on driving conditions, on the basis of the throt-

tle position, the engine speed, the primary pulley (input) revolution speed, the secondary pulley (output) revo-

lution speed, the brake signal, the PNP switch signal, the lock-up signal, the voltage, the target gear ratio, the

fluid temperature, and the fluid pressure.

Feedback Control

When controlling the normal fluid pressure or the selected fluid pressure, the secondary pressure can be set

more accurately by using the fluid pressure sensor to detect the secondary pressure and controlling the feed-

back.

SCIA1846E

HYDRAULIC CONTROL SYSTEM

TM-99

< FUNCTION DIAGNOSIS >

[CVT: RE0F09B]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

Component Parts Location - Coupe

INFOID:0000000004201639

1.

Control device assembly (Instruction
mode select switch and instruction
mode position select switch)

2.

Accelerator pedal position (APP)
sensor

3.

Secondary speed sensor

4.

CVT unit harness connector

5.

TCM

6.

Battery

7.

Shift position indicator
Instruction mode indicator

AWDIA0166ZZ