![]() Stop at least one vehicle length before the slope.In the Driving Techniques sub-section of the Off-Road Driving section, the Descending steep slopes page contains additional information on how to use rather than simply enable HDC. Clutch must not be pressed (manual vehicles only).Vehicle must be travelling at less than 50kmh/31mph.The green HDC light illuminates solid in Low, and flashes in High.HDC can be engaged in high or low range but only operates in Low Range.The Owners manual provides operating instructions for the HDC that are basic at best. The premise therefore seems to be that HDC is a safety net which works in conjunction with engine braking rather than a replacement for engine braking. There are a couple of other safety concerns, such as neutral being selected - possibly due to gear lever being knocked out of gear during a rough descent?Īll these concerns underscore the key point that HDC is intended to assist when engine braking alone is insufficient to control vehicle speed. The concern was that loss of traction on a single wheel would render engine braking ineffective leading to loss of control of the vehicle. If you read the documentation covering HDC it becomes apparent that one of the factors driving it's adoption was the removal of the user lockable Centre Diff Lock. The HDC will certainly operate this way but it's not necessarily going to be particularly effective!! The problem with HDC seems to be that it looks pretty simple - put the TC in low and push the HDC button and off you go. The D2 Hill Descent Control always seems to polarise opinion, with owners either loving it or hating it.
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