Diagnostic system for a vehicle electrical system
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United States of America Patent
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Apr 28, 2020
Grant Date -
Nov 8, 2018
app pub date -
Apr 11, 2018
filing date -
May 3, 2017
priority date (Note) -
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Abstract
A diagnostic having an analog-to-digital converter that is electrically coupled to an output port of a first analog multiplexer and an output port of a second analog multiplexer is provided. The analog-to-digital converter receives the high side voltage level signal and the low side current level signal at first and second times, respectively, and outputs a high side voltage value and a low side current value, respectively, based on the high side voltage level signal and the low side current level signal, respectively, that are received by a microcontroller. The microcontroller commands a high side driver circuit and a low side driver circuit to transition a contact of the contactor to an open operational position when the first analog multiplexer is malfunctioning based on the high side voltage value.
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