Abstract: A disconnection module for an electronic control unit of a motor vehicle. The electronic control unit includes a disconnection module configured to be electrically connected to at least one electrical link, to determine the difference between the voltage measured on the at least one electrical link and a reference voltage and to command the triggering of electrical safety members when the determined voltage difference is greater than a predetermined breakdown threshold.

Abstract: A device for diagnosing the loss of a connection to a ground (M) of an electronic control module (BCM) of a motor vehicle, noteworthy in that a first branch (B1) for connecting to the ground (M) includes: elements of unidirectional current conduction (Dd) mounted in parallel with a two-position switch (INT), the two-position switch (INT) being configured to toggle between a closed short-circuit position of the elements of unidirectional current conduction (Dd) and an open position of diagnostic of the loss of connection to the ground (M) of the electronic control module (BCM) on the first connecting branch (B1), and, elements for generating a current (Idiag) on the first connecting branch (B1).

Abstract: A device (1) for diagnosing the loss of a connection to a ground (M) of an electronic control module (BCM) of a motor vehicle, includes a first branch (B1) connecting the electronic control module to the ground, a second branch (B2) connecting the electronic control module to the ground adapted to receive power currents originating from power equipments (EQP) and including unidirectional current-conducting elements (D), a diagnostic circuit (CD) connected to the second branch at the level of a measurement point (PM) situated between the unidirectional current-conducting elements and the ground and defining a voltage (Vdiag) for diagnosing a loss of connection to the ground (M) of the electronic control module on the first branch (B1). The second branch includes, between the measurement point of the diagnostic circuit and the ground, voltage-generating elements (Rs, Idiag) adapted to increase the diagnostic voltage in case of disconnection of the first branch.