TITLE: Control device and method for managing a control device Method for managing a control device (100) in particular for a vehicle, according to which the control device (100) comprises a connection (110) for connecting a signal line (200) connecting an external unit (300) to the connection (110) of the control device (100), the method comprising: transmitting a test signal (TS) through the connection (110), receive a test signal (TSr) on the branch (110), this reflected test signal (TSr) having in particular at least one reflected part of the test signal (TSr), and determine a first quantity (G1) characterizing the quality of the signal line (200) as a function of the reflected test signal (TSr). Figure 1
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