Nissan Juke F15. Manual - part 1247

TM-178

< SYSTEM DESCRIPTION >

[CVT: RE0F10B]

SYSTEM

OIL PRESSURE CONTROL SYSTEM
OIL PRESSURE CONTROL SYSTEM : System Diagram

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OIL PRESSURE CONTROL SYSTEM : System Description

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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 driving force is transmitted from the ECM to the TCM,

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

P1777

A malfunction is detected in low side (when vehicle is stopped)

• Vehicle speed is not increased
• Lock-up is not performed

A malfunction is detected in high side (during driving)

• Start  is  slow
• Acceleration is slow
• Lock-up is not performed

U0100

—

• Start  is  slow
• Acceleration is slow
• Vehicle speed is not increased

U1000

—

• Start  is  slow
• Acceleration is slow
• Vehicle speed is not increased

U1010

—

• Start  is  slow
• Acceleration is slow
• Vehicle speed is not increased

DTC

Condition

Vehicle behavior

JSDIA2384GB

SYSTEM

TM-179

< SYSTEM DESCRIPTION >

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• Highly accurate line pressure control and secondary pressure control reduces friction for improvement of

fuel economy. 

Normal Oil Pressure Control

Appropriate line pressure and secondary pressure suitable for driving condition are determined based on the

accelerator pedal position, engine speed, primary pulley (input) speed, secondary pulley (output) speed, input

torque, stop lamp switch signal, transmission range switch signal, lock-up signal, power voltage, target shift

ratio, oil temperature and oil pressure. 

Secondary Pressure Feedback Control

In normal oil pressure control and oil pressure control in shifting, highly accurate secondary pressure is deter-

mined by detecting the secondary pressure using an oil pressure sensor and by feedback control. 

CONTROL SYSTEM
CONTROL SYSTEM : System Diagram

INFOID:0000000012200883

JSDIA2455GB

JSDIA5166GB

TM-180

< SYSTEM DESCRIPTION >

[CVT: RE0F10B]

SYSTEM

CONTROL SYSTEM : System Description

INFOID:0000000012200884

The TCM senses vehicle operating conditions through various sensors or signals. It always controls the opti-

mum shift position and reduces shifting and lock-up shocks.

TCM FUNCTION

The function of the TCM is to:

• Receive input signals transmitted from various switches and sensors.

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

• Transmit required output signals to the respective solenoids.

TCM INPUT/OUTPUT SIGNAL

*1: Input by CAN communications.
*2: If these input/output signals show errors, TCM activates the fail-safe function.

CONTROL SYSTEM : CAN Communication

INFOID:0000000012200885

• CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle

multiplex communication line with high data communication speed and excellent malfunction detection abil-

Sensor (or signal)

⇒

TCM function

⇒

Actuator

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

Shift control
Line pressure control
Primary oil pressure control
Secondary oil pressure control
Lock-up control
Engine brake control
Vehicle speed control
Integrated Control System
Fail-safe function
Self-diagnosis function
Communication function with CON-
SULT
CAN communication control

Line pressure solenoid valve
Secondary pressure solenoid valve
Torque converter clutch solenoid 
valve
Lock-up select solenoid valve
Step motor
Shift position indicator
Manual mode indicator

Control item

Line pres-

sure control

Select con-

trol

Shift control

Lock-up 

control

CAN com-

munication 

control

Fail-safe 

function

*2

Input

Transmission range switch

×

×

×

×

×

×

CVT fluid temperature sensor

×

×

×

×

×

Secondary pressure sensor

×

×

×

Primary speed sensor

×

×

×

×

×

Secondary speed sensor

×

×

×

×

×

×

Engine speed signal

*1

×

×

×

×

×

Accelerator pedal position signal

*1

×

×

×

×

×

×

Closed throttle position signal

*1

×

×

×

×

Stop lamp switch signal

*1

×

×

×

×

Manual mode signal

*1

×

×

×

×

×

Paddle shifter

*1

×

×

×

×

TCM power supply

×

×

×

×

×

×

Output

Line pressure solenoid

×

×

×

×

Secondary pressure solenoid

×

×

×

Torque converter clutch solenoid

×

×

×

Lock-up select solenoid valve

×

×

×

Step motor

×

×

SYSTEM

TM-181

< SYSTEM DESCRIPTION >

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ity. Many electronic control units are equipped onto a vehicle, and each control unit shares information and

links with other control units during operation (not independent). In CAN communication, control units are

connected with 2 communication lines (CAN-H and CAN-L) allowing a high rate of information transmission

with less wiring. Each control unit transmits/receives data but selectively reads required data only.

• For a list of CAN communication signals, refer to 

LAN-30, "CAN COMMUNICATION SYSTEM : CAN Com-

munication Signal Chart"

.

CONTROL SYSTEM : Engine and CVT Integrated Control (CAN Communication Con-
trol)

INFOID:0000000012200886

• For purposes including improving the feeling when shifting speeds and preventing drops in engine speed,

engine output control signals are exchanged between the ECM and TCM, and real-time cooperative control

is performed according to the vehicle driving conditions.

• TCM sends the sudden deceleration signal, lock-up engaged signal, torque-down request signal, and other

information to ECM, and also receives the torque-down permission/prohibit signals, lock-up permission/pro-

hibit signals, accelerator position, and other information from ECM.

CONTROL SYSTEM : Control between CVT and Combination Meter (CAN Communi-
cation Control)

INFOID:0000000012200887

TCM sends the manual mode display request, shift position indicator signal, and other information to the com-

bination meter, and also receives the manual mode signal and other information from the combination meter.

CONTROL SYSTEM : Control between CVT and BCM (CAN Communication Control)

INFOID:0000000012200888

TCM receives signals from the stop lamp switch via BCM.

LOCK-UP AND SELECT CONTROL SYSTEM
LOCK-UP AND SELECT CONTROL SYSTEM : System Diagram

INFOID:0000000012200889

LOCK-UP AND SELECT CONTROL SYSTEM : System Description

INFOID:0000000012200890

• 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.

JSDIA1355GB