SSANGYONG Kyron Repair Manual page 704

10 8510
HDC (Hill Descent Control) System Operating Conditions
1. When HDC switch is turned ON
2. Gearshift lever position (Forward/Reverse)
Manual transmission: operates in the 1st gear or reverse gear position (does not operate in neutral position).
Automatic transmission: operates in any position except P (parking) or N (neutral) positions.
NOTICE
• The vehicles with manual transmission do not have a separate device or switch that detects the 1st gear. It
only detects the forward/reverse driving direction of the vehicle through backup lamp switch and neutral switch,
and cannot solely detect the 1st gear position. The reason for noting the 1st gear above, though the HDC also
operates in 2nd gear position, is because the engine may turn off during the HDC operation process. You may
face a very dangerous situation if the engine turns off at a steep hill.
• The HDC is the device to improve the engine brake effect during downhill driving on a steep hill. For manual
transmission equipped vehicle, HDC system should operated only in 1st gear.
3. When not depressing the accelerator pedal or brake pedal.
4. The vehicle speed is above 7 km/h (in Automatic transmission/4H mode).
NOTE
• The vehicle speed given in step (3) varies according to the vehicle driving mode, and the speed ranges by the
vehicle driving mode and condition are as follows.
1) Speed available in HDC mode (slope)
2H/4H mode: vehicle speed below 50 km/h (operation slope level: 10%, termination slope
level: when it reaches 8%)
Forward
driving
4L mode: vehicle speed below 25 km/h (operation slope level: 10%, termination slope
level: when it reaches 5%)
2H/4H mode: vehicle speed below 50 km/h (operation slope level: 8%, termination slope
level: when it reaches 5%)
Reverse
driving
4L mode: vehicle speed below 25 km/h (operation slope level: 8%, termination slope level:
when it reaches 4%)
2) HDC target speed in 2H/4H mode
(The HDC target speed is the speed that the HDC is not terminated even after the vehicle speed reaches 7
km/h, but is converted to the stand-by mode. When the vehicle speed increases again as a result of the
increase of the road steepness, etc., the HDC goes into operation.)
Forward driving: 7 km/h
Reverse driving: 7 km/h (automatic transmission), 8.5 km/h (manual transmission)
3) HDC target speed in 4L mode
Forward and reverse driving: 3 km/h
SWITCHES / ELECTRIC DEVICES
KYRON SM - 2005.09
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