Nissan Maxima. Manual - part 1139

TM-20

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

HYDRAULIC CONTROL SYSTEM

Normal 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 transmission range switch signal, the lock-up signal, the voltage, the target

gear ratio, the fluid temperature, and the fluid pressure.

Feedback Control

For the normal fluid control and the select fluid control, secondary pressure is detected for feedback control by

using a secondary pressure sensor to set a high-precision secondary pressure.

HYDRAULIC CONTROL SYSTEM

TM-21

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

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Component Parts Location

INFOID:0000000009469024

1.

CVT shift selector assembly (Manual 
mode select switch and manual 
mode position select switch)

2.

Secondary speed sensor

3.

CVT unit harness connector

AWDIA1036ZZ

TM-22

< SYSTEM DESCRIPTION >

[CVT: RE0F09B]

HYDRAULIC CONTROL SYSTEM

Component Description

INFOID:0000000010113301

TRANSAXLE ASSEMBLY

EXCEPT TRANSAXLE ASSEMBLY

4.

TCM

5.

Accelerator pedal position (APP) 
sensor

6.

Stop lamp switch

7.

Shift positioner indicator
Manual mode indicator
DS mode indicator

8.

Paddle shifters

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 deactivates the lock-up.
• Locks up smoothly by opening lock-up operation excessively.

Shift control valve

Controls inflow/outflow of line pressure from the primary pulley depending on the stroke 
difference 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. 

Manual 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

The select switch valve enables to select engagement/disengagement of lock-up clutch 
and that of forward clutch and reverse clutch.

TCC solenoid valve

TM-67

Secondary pressure solenoid valve

TM-77

Line pressure solenoid valve

TM-71

Step motor

TM-109

Lock-up select solenoid valve

TM-106

Primary speed sensor

TM-57

Secondary speed sensor

TM-60

Transmission range switch

TM-50

Primary pulley

TM-18

Secondary pulley

Forward clutch

Torque converter

Name

Function

TCM

Judges driving condition according to signals from each sensor, and optimally controls 
variable speed mechanism.

Accelerator pedal position sensor

TM-98

CONTROL SYSTEM

TM-23

< SYSTEM DESCRIPTION >

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CONTROL SYSTEM

System Diagram

INFOID:0000000010113439

System Description

INFOID:0000000010113440

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.

*: With paddle shifter

INPUT/OUTPUT SIGNAL OF TCM

AWDIA0739GB

SENSORS (or SIGNAL)

⇒

TCM

⇒

ACTUATORS

Transmission range switch
Accelerator pedal position signal
Closed throttle position signal
Engine speed signal
CVT fluid temperature sensor
Vehicle speed signal
Manual mode signal
Paddle shifter signal

*

Stop lamp switch signal
Primary speed sensor
Secondary speed sensor
Primary pressure 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 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
Manual mode indicator
Shift position indicator
Starter relay
DS mode indicator