Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
HDC: Hill Descent Control
During steep desecnts on low-traction road surfaces (sand, gravel, snow and ice) the engine's drag torque is not enough to maintain vehicle speed at a low, constant rate. Owing to its relatively low speed and the low-traction road surface, if the brakes are applied the vehicle will tend to pull to one side, despite ABS.
HDC employs selective braking intervention to consistently maintain the preset speed (maximum of 25 km/h) and simultaneously stabilize the vehicle in a process mirroring closed-loop control from DSC.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.