Hill Start Aid Override Switch

Some vehicles are equipped with a hill start aid (HSA) feature to prevent the vehicle from rolling while on steep grades and to allow for a controlled launch.

HSA is automatically active in the following conditions:

• the vehicle is in forward gear and facing uphill on an incline greater than one percent

• the vehicle is in reverse mode and facing downhill on an incline greater than one percent.

HSA delays the release of the service brakes for a maximum of three seconds until enough torque is available to begin moving the vehicle forward.

HSA can be turned off by toggling up the HSA override switch, shown in Fig..