This may be a dumb question but have you checked for updates and/or re-program/code the DSC system? When I have weird issues like this, once normal diagnosis has failed I program/code the offending control module to verify that isn't the issue.
I'm not sure what voltage the wear sensors operate at but I would also check the wires for voltage and reference to ground to make sure there isn't a short somewhere else in the wiring.
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