See also:

ON
This is the normal operating position after the engine is started. ...

Acc
In this position the electrical accessories (radio, accessory power outlet, etc.) can be used. ...

Front seatbelt pretensioners
The driver’s and front passenger’s seatbelts have a seatbelt pretensioner. The seatbelt pretensioners for the driver’s seat and front passenger’s seat operate at the same time as the frontal ...