SSANGYONG KYRON 2010.01 Manual page 800

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3) HDC (Hill Descent Control) System Non-Operation Conditions
1. When HDC switch is turned OFF
2. Gearshift lever has passed neutral (N) position.
· Vehicle with manual transmission: Sensing at the neutral switch
· Vehicle with automatic transmission: Sensing at the selector lever unit
3. When the vehicle speed is out of the specified values.
4. When the ESP related functions, e.g. vehicle position control,
HBA, ARP is activated during HDC operation.
The HDC is the device to improve the engine brake effect during downhill driving on a steep
hill. If the ESP function is in operation, HDC operation is overridden.
5. When the internal temperature of HDC system goes over 450°C
due to long downhill driving on a steep hill with HDC operated.
There is no specific temperature sensor in the system, but a programmed logic inside the
HECU predicts the temperature based on the operating numbers and conditions of HDC.
The red HDC warning lamp blinks when the internal temperature goes over 350°C.
·
When it reaches 450°C, the HDC warning lamp comes on. The HDC can be operated
in the range even where the HDC warning lamp blinks.
6. When the slope level is below 10%
When the slope level exceeds 10%, the HDC operates until the vehicle reaches the speed
condition given in step (4).
▶ When the slope level is between 10% and 20% during the HDC operation
When depressing the accelerator pedal or brake pedal, HDC system is changed to stand-by
mode. When depressing the accelerator pedal again, HDC starts its operation again. Therefore,
drivers can control the vehicle speed to a desired level by operating the accelerator pedal.
▶ When the slope level exceeds 20% during the HDC operation
When depressing the accelerator pedal, HDC system is changed to stand-by mode. When
depressing the brake pedal, HDC continues its operation and the braking power is increased.
In this case, HECU sounds an abnormal noise and brake pedal may be very rigid, but this is a
normal condition due to HDC operation.
ESP
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