Symbol 3721 from ISO 7000 - Title/Meaning: Rear/side door 
Function/description: To indicate that the door is open or not properly latched, or is malfunctioning.
Own work using: iso.org/obp/graphics/grs/fad51add-6325-42f7-b17d-19bdc9aeed0a 200.png
Vectorization:  Mrmw