Method for error diagnosis of CAN communication

Abstract

Disclosed is a method for an error diagnosis of can communication. In the method, the rolling counter values stored in the main electronic and sub-electronic control devices are compared with each other. When the rolling counter difference value is within the predetermined error diagnosis reservation range, the determination on the error diagnosis for the corresponding can communication is reserved. When the accumulated number of the error diagnoses reaches the predetermined number for the error diagnosis determination as the rolling counter difference value departs from the error diagnosis reservation range, it is determined that the error of the can communication occurs. When the rolling counter values of the main electronic and the sub-electronic control devices match each other, it is determined that the error diagnosis for the can communication is normal, in which case, even if the temporary signal delay phenomenon (that is, the Jitter) occurs in the can communication, an erroneous diagnosis of the error for the can communication can be efficiently interrupted.

Description

technical field [0001] The present disclosure relates to a method for error diagnosis of CAN communication, and more particularly, to a method in which a temporary signal delay that can occur at the time of receiving data is prevented from being misjudged as a CAN communication error In CAN communication between the main electronic control device and the secondary electronic control device that transmits data. Background technique [0002] As is generally known in the art, a vehicle includes many electronic components and a plurality of electronic control devices for controlling the electronic components. CAN communication is mainly used to exchange data between electronic control devices. [0003] Data transmitted by CAN communication corresponds to data used in vehicle operation, and is important in safe operation of the vehicle. Accordingly, it is necessary to diagnose whether an error has occurred with respect to data transmitted through CAN communication. [0004] Ac...

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Problems solved by technology

[0010] Accordingly, the present disclosure has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present disclosure is to provide a method for error diagnosis of CAN communication in which Compared with the rolling counter value in the auxiliary electronic control device, when the rolling counter difference is within the predetermined error diagnosis reserve range, the determination of the error diagnosis for the corresponding CAN communication is reserved; when the rolling counter difference deviates from the error diagnosis reserve range And when the accumulated number of error diagnosis reaches a predetermined number for error diagnosis determination, it is determined that an error of CAN communication occurs, and when the rolling counter values ​​of the main electronic control device and the sub electronic control device match each other, it is determined that an error for CAN communication Misdiagnosis is normal

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