Shift Mode Selection By Tcu - SSANGYONG Actyon Sports II 2012.01 Manual

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Pressure Modulation
To provide a higher level of shift comfort and durability, the hydraulic pressure in the shift related
friction elements of the transmission must be matched accurately to the input torque to
transmission. This hydraulic pressure is composed of a hydraulically pre-set basic pressure and a
control pressure which is set by one of the variable bleed solenoids.
The transmission input torque can be directly calculated from the following operating parameters:
- engine torque signals
- engine speed or any signal transmitted from ECU through CAN lines
- converter slip
Separate pressure characteristics for each gear change make it possible to adapt precisely to the
particular shift operation.

5) Shift Mode Selection by TCU

The driver can select Standard (S) or Winter mode (W) with the mode switch. TCU automatically
changes the shift mode according to the transmission oil temperature, uphill or downhill gradient,
and altitude to keep the good driving conditions.
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Standard Mode (S)
Standard Mode is selected when setting the mode switch in Standard (S) position with the gear
select lever in "D" and the transmission oil temperature in normal operating range. Proper shift
timing provides the optimized fuel economy and good driving conditions.
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Uphii and Downhill Mode
In this mode, the operating points of torque converter lock-up clutch and the shifting points are
adjusted according to the vehicle weight.
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Altitude Mode
In this mode, the shifting points are automatically adjusted according to the altitude to compensate
the engine torque changes due to barometric pressure and temperature.
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