Hill Start Aid

The hill start aid (HSA) feature prevents the vehicle from rolling on a slope steeper than three percent to allow for a controlled launch.

HSA prevents a stationary vehicle in forward gear from rolling downhill prior to continuing to drive up the hill; HSA also prevents a stationary vehicle in reverse gear from rolling downhill prior to continuing to back up the hill.

HSA delays the release of service brakes until enough torque is available to begin moving the vehicle, up to a maximum of three seconds. If sufficient driveline torque is not detected after three seconds, the system audibly alerts the driver and releases the brakes.

HSA is on by default. It can be turned off by pressing the HSA OFF dash switch shown in Fig. .

Fig. 1, Hill Start Aid Off Dash Switch

When hill start aid is inactive, the HSA OFF telltale, shown in Fig. flashes on the driver display screen.

Fig. 2, Hill Start Aid Disengaged Telltale

To turn hill start aid on again, press the HSA OFF switch or cycle the vehicle keyswitch.

If the hill start aid disengaged telltale appears as a solid image on the driver display screen, there is a fault in the system.