Nissan Juke F15. Instruction — part 1247
TM-178
< SYSTEM DESCRIPTION >
[CVT: RE0F10B]
SYSTEM
OIL PRESSURE CONTROL SYSTEM
OIL PRESSURE CONTROL SYSTEM : System Diagram
INFOID:0000000012200881
OIL PRESSURE CONTROL SYSTEM : System Description
INFOID:0000000012200882
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 >
[CVT: RE0F10B]
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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
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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
Instruction 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
Instruction 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
×
×
×
×
Instruction 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 >
[CVT: RE0F10B]
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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-
.
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 instruction mode display request, shift position indicator signal, and other information to the com-
bination meter, and also receives the instruction 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.
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