The present invention relates to a method and a device for controlling operational sequences, in particular in a vehicle. In this context, a functional unit (3) for forwarding and receiving data via at least one connecting unit (4) is in contact with at least one
bus system (2). Functional unit (3) is monitored by a monitoring unit (8). The monitoring unit (8) prevents the forwarding of data by the functional unit (3) via the at least one
bus system (2) if it detects an error of the functional unit (3). In an error case, in order to prevent the forwarding of data by functional unit (8) in as simple as possible a manner, yet one that is safe and reliable, it is proposed that an
error signal (WDA) be emitted by the monitoring unit (8), which assumes different values as a function of whether an error of functional unit (3) has been recognized or not, and the
error signal (WDA) be applied to the at least one connecting unit (4) and the at least one connecting unit (4) be deactivated by the
error signal (WDA) that is present, if an error of the functional unit (3) has been detected.