Nissan Juke F15. Manual — part 1300
TM-390
< SYSTEM DESCRIPTION >
[CVT: RE0F10D]
SYSTEM
LOCK-UP CONTROL : System Description
INFOID:0000000012201104
SYSTEM DIAGRAM
DESCRIPTION
• Controls for improvement of the transmission efficiency by engaging the torque converter clutch in the
torque converter and eliminating slip of the converter. Achieves comfortable driving with slip control of the
torque converter clutch.
• The oil pressure feed circuit for the torque converter clutch piston chamber is connected to the torque con-
verter clutch control valve. The torque converter clutch control valve is switched by the torque converter
clutch solenoid valve with the signal from TCM. This controls the oil pressure circuit, which is supplied to the
torque converter clutch piston chamber, to the release side or engagement side.
• If the CVT fluid temperature is low or the vehicle is in fail-safe mode due to malfunction, lock-up control is
prohibited.
Lock-up engagement
In lock-up engagement, the torque converter clutch solenoid valve makes the torque converter clutch control
valve locked up to generate the lock-up apply pressure. This pushes the torque converter clutch piston for
engagement.
Lock-up release condition
In lock-up release, the torque converter clutch solenoid valve makes the torque converter clutch control valve
non-locked up to drain the lock-up apply pressure. This does not engage the torque converter clutch piston.
INTEGRATED CONTROL SYSTEM
JSDIA5314GB
SYSTEM
TM-391
< SYSTEM DESCRIPTION >
[CVT: RE0F10D]
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INTEGRATED CONTROL SYSTEM : System Diagram
INFOID:0000000012201105
INTEGRATED CONTROL SYSTEM : System Description
INFOID:0000000012201106
• TCM receives the NORMAL mode signal, ECO mode signal or SPORT mode signal from the multi display
unit through CAN communication.
• TCM sends the recognized control mode to ECM through CAN communication (drive mode select signal).
• With operation on the multi display unit, the mode is changed on the display, but the mode is actually not
changed due to CAN communication malfunction.
• When the selector lever is in any position other than D position, the gear shift line is not changed according
to changes in the control mode.
CONTROL DESCRIPTION
JSDIA7197GB
TM-392
< SYSTEM DESCRIPTION >
[CVT: RE0F10D]
SYSTEM
Sport Mode Function
High Gear Ratio Limit
• Engine speed is kept higher than at D position driving, which helps to operate a “sporty” driving.
Step Shift
• Pressing down the accelerator pedal allows to drive the vehicle
with a feeling of A/T-like gear shifting.
Braking Down Shift
Control mode
Control
NORMAL mode
Driving mode that automatically selects the shift schedule considering the balance of fuel economy and
driving performance based on the driving condition and driving trend.
SPORT mode
Keeps high engine speed and provides direct feel and acceleration performance suitable for driving on
winding road.
Sport mode performs the following control:
• High gear ratio limit
• Step shift
• Braking down shift
• Acceleration off ratio hold
• Cornering ratio hold
ECO mode
Driving mode that selects the shift schedule with priority on fuel economy which gives low engine revo-
lution.
JSDIA2893GB
JSDIA3708GB
SYSTEM
TM-393
< SYSTEM DESCRIPTION >
[CVT: RE0F10D]
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• At a moderate braking operation before corner etc., the engine speed increases according to the decelera-
tion and the transaxle shifts down automatically, in order to optimize the response at reacceleration while
providing an adequate engine braking.
Acceleration Off Ratio Hold
• When the vehicle is decelerated by quickly releasing the foot from accelerator pedal, transmission does not
shift up automatically to keep a constant gear ratio, holding the high engine speed.
When the vehicle is decelerated (by accelerator pedal OFF) in upper area of double line in below chart, the
engine speed shows a characteristic like “A”.
On the other hand, when the vehicle is decelerated (by accelerator pedal OFF) in lower area of double line in
below chart, the engine speed shows a characteristic like “B”.
Cornering Ratio Hold
• Transaxle holds gear ratio in order to keep a smooth vehicle speed during the curve and to give an adequate
driving force at the curve end.
FAIL-SAFE
If CAN communication malfunction occurs between TCM and the multi display unit, the mode when the mal-
function occurs is maintained for approximately 30 seconds and the mode is changed to NORMAL mode
when the accelerator pedal is released.
JSDIA2894GB
JSDIA5404GB
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