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(5) Warnings for HDC Operation
HDC system is a supplemental system for brake system. The operating conditions should be
kept. The operating noise is much different from that from ABS/ESP system.
Make sure to remember the warning conditions below:
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The HDC system has been developed to enhance the driving safety on steep downhill.
Therefore, avoid using the HDC system on level roads.
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If the HDC system is used frequently, the internal components of ESP HECU and related
parts could be damaged.
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Place the HDC switch at OFF position while the vehicle is driving on level; roads. As
mentioned earlier, the HDC system is operable even when the vehicle is driving on level
roads. This could cause the driver to lose control of the vehicle resulting in an accident.
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The heavy noise from HECU and brake system during HDC operation is normal operating
conditions and is not hazardous.
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