Subaru Forester: Instruments and controls / Horn

To sound the horn, push the horn pad.
Other information:
..
The BSD/RCTA will operate when all of the
following conditions are met.
The ignition switch is in the “ON”
position.
The BSD/RCTA warning light and BSD/
RCTA OFF indicator light are turned off.
The EyeSight warning indicator is off.
The vehicle is driven at speeds above 7
mph (12 km/h) (except when reversing)...