Vehicle-mounted remote terminal fault diagnosis method and system

Abstract

The invention discloses a vehicle-mounted remote terminal diagnosis method and system. The method comprises the steps: obtaining the continuous working time of a vehicle-mounted remote terminal after the vehicle-mounted remote terminal is powered off and the continuous working time of an ECU after the ECU is powered off, and enabling the continuous working time of the terminal to be smaller than the continuous working time of the ECU; and after the ECU is powered off, determining whether the vehicle-mounted remote terminal can receive the message sent by the ECU or not after the continuous working duration of the terminal, and if the message sent by the ECU can be continuously received, judging that the ACC line wiring fault exists in the vehicle-mounted remote terminal. According to the vehicle-mounted remote terminal diagnosis method provided by the invention, the vehicle-mounted remote terminal is configured so that the vehicle-mounted remote terminal can determine whether the vehicle-mounted remote terminal has the wiring fault or not based on the continuous working duration of the terminal, and then wiring fault detection can be automatically realized through the vehicle-mounted remote terminal; and meanwhile, the vehicle-mounted remote terminal can also automatically report a fault detection result so that a manufacturer can find an existing fault in time.

Description

technical field [0001] Embodiments of the present invention relate to vehicle engineering technology, and in particular to a vehicle remote terminal fault diagnosis method and system. Background technique [0002] The after-installed vehicle-mounted terminal generally has a positive and negative DC power supply line, an ACC line that determines the start and end of the driving cycle, and a CAN line that interacts with the entire vehicle. [0003] The after-installed vehicle-mounted terminal is generally installed by a non-manufacturing factory such as a service station or an individual. During the installation of the vehicle-mounted terminal, the ACC wiring harness may be connected to the battery terminal of the vehicle or the CAN line may be connected incorrectly due to operator error during the installation of the vehicle-mounted terminal, and Failures such as poor contact caused by loose wiring during long-term use will cause vehicle-mounted terminals to identify vehicle ...

AI Technical Summary

Problems solved by technology

[0003] The after-installed vehicle-mounted terminal is generally installed by a non-manufacturing factory such as a service station or an individual. During the installation of the vehicle-mounted terminal, the ACC wiring harness may be connected to the battery terminal of the vehicle or the CAN line may be connected incorrectly due to operator error during the installation of the vehicle-mounted terminal, and Failures such as poor contact caused by loose wiring during long-term use will cause vehicle-mounted terminals to identify vehicle driving cycle errors, or remote terminal CAN link layer communication failures, which will lead to a series of problems such as abnormal locks and diagnostic failures. Negative impact on end products and vehicles

[0004] At present, when the vehicle-mounted terminal of the vehicle is wired incorrectly, it is generally only when there is a problem affecting the function of the vehicle-mounted terminal that professionals are sent to the site for investigation. Fault discovery is generally delayed, which will cause great negative effects on the use of the vehicle-mounted terminal influences

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