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Additional operating information While anti-lock braking is designed to operate equally effectively in ‘off-road’ driving conditions, on certain surfaces total reliance on the system may be unwise - remember, in normal circumstances, anti-lock braking operates only AFTER one or more roadwheels has reached the limit of its grip. It cannot reliably compensate for driver error or inexperience on difficult off-road surfaces.

Note the following:

  • Under ABS control, heavy braking on a dry road may produce tire noise and slight marking of the road surface. Neither need cause concern.

  • On soft or deep surfaces such as powdery snow, sand or gravel, and on extremely rough ground, the braking distance required by the anti-lock braking system may be greater than those achievable with a non-ABS system, even though improved steering would be experienced. This is because the natural action of locked wheels on soft surfaces is to build up a wedge of surface material in front of the wheels, which assists in stopping.

  • The driver should always take account of the surface to be travelled over and the fact that brake pedal reactions will be different from those experienced on a non-ABS vehicle.

  • When maximum braking is required on loose or bumpy surfaces, full braking effort should be applied.

  • If the vehicle is stopped on a very steep slope where little traction is available, it may slide with the wheels locked because there is no wheel rotation to signal movement to the ABS. To counteract this, briefly release the brakes to permit some wheel movement, then re-apply the brakes to allow the system to gain control at a suitable speed.

  • Before driving off-road read and thoroughly understand ‘BASIC OFF-ROAD TECHNIQUES’, page 158.


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