Vehicle communications signal diagnostics using radio receiver
First Claim
1. An automotive diagnostic tool comprising:
- a controller configured to output, to a speaker, an audio signal derived from an antenna signal demodulated at a frequency in a predetermined range corresponding to electromagnetic emissions caused by a differential signal channel being imbalanced and cause a vehicle controller to operate the differential signal channel to alternate between periods of signal activity and periods of signal inactivity causing corresponding audio signatures in the audio signal.
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Accused Products
Abstract
An automotive diagnostic tool includes an antenna, a speaker, and a controller. In response to a vehicle diagnostic request, the controller generates a carrier frequency that corresponds to a predetermined frequency associated with electromagnetic emissions from an imbalanced differential channel in the vehicle. The controller alternately enables and disables the differential channel resulting in an audio signature and a baseline audio signature. The controller demodulates signals from the antenna based on the carrier frequency and outputs the demodulated signal to the speaker for analysis by a listener. The demodulated signal may be further processed by the controller to identify emissions from the communication network.
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Citations
20 Claims
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1. An automotive diagnostic tool comprising:
a controller configured to output, to a speaker, an audio signal derived from an antenna signal demodulated at a frequency in a predetermined range corresponding to electromagnetic emissions caused by a differential signal channel being imbalanced and cause a vehicle controller to operate the differential signal channel to alternate between periods of signal activity and periods of signal inactivity causing corresponding audio signatures in the audio signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An automotive diagnostic tool comprising:
a controller configured to generate an audio signal by demodulating an antenna signal at a frequency in a predetermined range corresponding to electromagnetic emissions caused by an imbalance of a differential signal channel, communicate with a vehicle controller to alternately enable and disable the differential signal channel in a vehicle such that the channel alternates between a period of signal activity resulting in an audio signature and a period of signal inactivity resulting in a baseline audio signature, and output a diagnostic signal responsive to identifying a presence of a disturbance in the audio signature that is absent from the baseline audio signature. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for diagnosing wiring issues in a vehicle comprising:
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demodulating by a controller an antenna signal at a frequency in a predetermined range corresponding to electromagnetic emissions caused by an imbalance of a differential signal channel; requesting by the controller a vehicle controller to operate the differential signal channel during alternating time periods such that the differential signal channel alternates between a period of signal activity to cause an audio signature and a period of signal inactivity to cause a baseline audio signature; and outputting by the controller to a speaker during alternating time periods the baseline audio signature and the audio signature that includes, when the differential signal channel is imbalanced, a disturbance distinct from the baseline audio signature. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification