An automotive diagnostic tool having an antenna 104 and a controller 102. In response to a vehicle diagnostic request, the controller demodulates an antenna signal at a frequency in a range corresponding to electromagnetic emissions caused by an imbalance of a differential signal channel 114 in the vehicle, and alternately disables and enables the differential channel resulting in a baseline audio signature and an audio signature that includes a disturbance distinct from the baseline. The controller may request a vehicle controller transmit a predetermined signal over the differential channel when enabled to cause EM emissions in a predetermined range when the channel is unbalanced. The controller may output the demodulated signal to a speaker 108 for analysis by a listener. The demodulated signal may be further processed to identify emissions from the communication network. Also claimed is a method of diagnosing wiring issues in a vehicle, and also an automotive diagnostic tool that outputs a diagnostic signal in response to identifying a presence of a disturbance in an audio signature that is absent when the channel is balanced.


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    Title :

    Vehicle communications signal diagnostics using radio receiver


    Contributors:

    Publication date :

    2017-08-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion



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