Vehicle anti-theft system

摘要

Ribs (9'a to 9'd) provided in a connector (50b) on the terminal device side are coincident with grooves (8'a to 8'd) provided in a connector (40b) on the ECU (30b) side, but are not coincident with grooves (8a to 8d) provided in a connector (40a) in position, size and shape. Even if the connector (40b) of the ECU (30b) without the immobilizer CPU (13) is attempted to be engaged the connector (50a) which should originally be connected to the ECU (30a) with the immobilizer CPU (13), it cannot be engaged or right electrical connections between input/output terminals in the ECU (30a) and corresponding terminal devices cannot be achieved. Accordingly, the theft of the vehicle by replacing the ECU (30a) with the ECU (30b) is prevented.