Toyota 2013 Avalon Hybrid Owner's Manual page 177

196
4-2. Driving procedures
Horn
To sound the horn, press on or
close to the mark.
■
After adjusting the steering wheel
Make sure that the steering wheel is securely locked.
The horn may not sound if the steering wheel is not securely locked.
(→P. 151)
AVALON_HV_U (OM41451U)