A method of checking the functionality of a vehicle Electronic Control Unit (ECU) 8 or a microcontroller 1 thereof, comprising the steps of: (a) providing a raw crankshaft signal 4 from a crankshaft sensor, said signal having a waveform comprising of a series of rising and falling edges; (b) inputting said raw crankshaft signal, or a signal derived therefrom, to said ECU or microcontroller thereof; (c) using one or more clock signals provided internally in the ECU or microcontroller thereof, to provide a replicated crankshaft signal from said input crankshaft signal of step (b); (d) comparing said raw crankshaft signal, or a signal derived therefrom, with said replicated crankshaft signal; (e) determining if there is an ECU or ECU microcontroller fault based on said comparison of step (d). It is an object of the invention to provide improved diagnostics coverage for state of health monitoring of an ECU main microcontroller that doesn’t rely on a serial peripheral interface for monitoring.
Method of checking the functionality of a vehicle microcontroller
2023-04-26
Patent
Electronic Resource
English
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