Nissan Altima L32. Manual - part 1439

TM-100

< FUNCTION DIAGNOSIS >

[CVT: RE0F09B]

HYDRAULIC CONTROL SYSTEM

Component Parts Location - Sedan

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1.

Control device assembly (Manual 
mode select switch and manual 
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
Manual mode indicator

AWIIA0001ZZ

HYDRAULIC CONTROL SYSTEM

TM-101

< FUNCTION DIAGNOSIS >

[CVT: RE0F09B]

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Component Description

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TRANSAXLE ASSEMBLY

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-144

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-155

Line pressure solenoid valve

TM-148

Step motor

TM-184

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

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

Lockup select solenoid valve

TM-181

Primary speed sensor

TM-135

Secondary speed sensor

TM-138

PNP switch

TM-129

Primary pulley

TM-95

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-175

TM-102

< FUNCTION DIAGNOSIS >

[CVT: RE0F09B]

CONTROL SYSTEM

CONTROL SYSTEM

System Diagram

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System Description

INFOID:0000000004201643

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

position and reduces shifting and lock-up shocks.

CONTROL SYSTEM OUTLINE 

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.

INPUT/OUTPUT SIGNAL OF TCM

JSDIA0073GB

SENSORS (or SIGNALS)

⇒

TCM

⇒

ACTUATORS

PNP switch
Accelerator pedal position signal
Closed throttle position signal
Engine speed signal
CVT fluid temperature sensor
Vehicle speed signal
Manual mode 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-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
Manual mode indicator
Shift position indicator
CVT indicator lamp
Starter relay

CONTROL SYSTEM

TM-103

< FUNCTION DIAGNOSIS >

[CVT: RE0F09B]

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*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

Manual 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