Abstract: A method and apparatus for fault recognition in an internal combustion engine, such as an auto-ignition internal combustion engine. A defect in the metering system is recognized if the boost pressure deviates from an expected value.

Abstract: A method and an apparatus for monitoring a system for controlling an internal combustion engine, in particular an auto-ignition internal combustion engine. In certain operating states, an adjuster for activating a throttle valve is activated in such a way that the throttle valve closes. A fault is recognized if the air quantity exceeds a threshold value.

Abstract: The invention proposes a process for error recovery in electronic control devices as well as apparatus for controlling the steering angle of the rear wheels of a motor vehicle. The control device controls an actuating member to which is connected a safety device. In the main operation of the control device, transmitter signals are detected, actuating values are calculated and the actuating member is controlled corresponding to the calculated values. The calculated actuating values and the detected transmitter signals are checked for consistency. On the basis of the checked values, a decision is made as to whether to continue running the main program or resort to one of two emergency measures. In the first emergency measure, the safety device is activated and the control of the actuating member is switched off. In the second emergency measure, the signals of transmitters continue to be detected and actuating values are calculated from these signals.