Vehicle electronics high-resistance fault detection and isolation

A method of detecting and isolating a high-resistance fault in vehicle electronics of a vehicle, the method comprising the steps of:

• determining electrical data for one or more portions of the vehicle electronics, the electrical data includes voltage data and/or current data concerning the one or more portions of the vehicle electronics;
• calculating a resistance for a plurality of resistance sets of the vehicle electronics based on the electrical data, wherein each of the plurality of resistance sets includes one or more electrical components;
• obtaining a resistance set threshold for each of the plurality of resistance sets of the vehicle electronics;
• for each of the plurality of resistance sets, evaluating whether the resistance of the resistance set exceeds the resistance set threshold;
• and
• based on the evaluating step, identifying one or more high-resistance fault candidates, the one or more high-resistance fault candidates includes at least one of the electrical component(s) from one or more of the resistance sets, wherein the determining step includes estimating at least some of the electrical data based on a known circuit configuration of the one or more portions of the vehicle electronics.

A method of detecting and isolating a high-resistance fault in vehicle electronics of a vehicle, the method comprising the steps of:

• determining electrical data for one or more portions of the vehicle electronics, wherein the electrical data includes voltage data and/or current data concerning a battery and a target vehicle system module (VSM) of the vehicle electronics;
• calculating a resistance for a plurality of resistance sets of the vehicle electronics based on the electrical data;
• obtaining a resistance set threshold for each of the plurality of resistance sets of the vehicle electronics;
• for each of the plurality of resistance sets, evaluating whether the resistance of the resistance set exceeds the resistance set threshold;
• based on the evaluating step, populating a high-resistance candidate set that includes one or more electrical components of each resistance set that is determined to have exceeded the resistance set threshold;
• and
• identifying one or more high-resistance fault candidates, wherein the one or more high-resistance fault candidates includes at least one of the electrical component(s) from one or more of the resistance sets determined to have exceeded the resistance set threshold.