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.
Vehicle communications signal diagnostics using radio receiver
16.08.2017
Patent
Elektronische Ressource
Englisch
DIAGNOSIS OF VEHICLE COMMUNICATION SIGNALS USING RADIO RECEIVER
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