Patent ID: 7889072

Claim:
A failure information detection device that detects abnormality of a vehicle-mounted device mounted in a vehicle and that transmits abnormality information to a server, characterized by, comprising: attachment detection means for detecting whether a first component part has been attached to the vehicle; abnormality detection means for detecting abnormality of a second component part that is disposed at the first component part; and abnormality detection prohibition means for prohibiting detection of abnormality or prohibiting transmission of the abnormality information if the attachment detection means detects that the first component part has not been attached to the vehicle, wherein: the attachment detection means has a connecting line that electrically connects the first component part and the vehicle, and break-of-line detection means for detecting a break of the connecting line; and the attachment detection means detects that the first component part has not been attached to the vehicle, if a break of the connecting line is detected.