The webinar Diagnosing xEVs: Loss of Isolation (LOI), hosted by Jérôme Bergeron-Carpentier from Consulab, delivers a straight-shooting guide to tracking down one of the most common high-voltage gremlins in electric and hybrid vehicles—because a loss of isolation can shut the whole system down fast, and knowing how to find it keeps techs safe and vehicles moving.

Relevant Training Systems

• EV High-Voltage Safety Training System (EV-400) — A bench-top simulator with fault insertion that replicates real LOI scenarios, letting students practice insulation resistance testing, fault isolation by disconnecting sections, safe high-voltage procedures, and using megaohm meters to pinpoint issues just like the webinar demos. https://daktic.com/product/ev-high-voltage-safety-training-system
• Tesla Model 3 Cutaway EV Training System (EV-601-TS) — A sectioned real Tesla Model 3 that supports component-level LOI testing on items like the A/C compressor and PTC heater, plus full high-voltage architecture for practicing isolation checks and diagnostics in a controlled setup. https://daktic.com/product/tesla-model-3-cutaway-ev-training-system

The talk zeros in on why loss of isolation hits hard in xEVs: that unintended path between high-voltage circuits and chassis ground triggers an instant contactor open, killing driveability and flagging a safety red light at voltages that don’t play nice. Jérôme walks through a clear diagnostic path—starting with safety basics like verified gloves and live-dead-live checks, then using insulation testers at safe voltages to measure resistance to ground, isolating suspect circuits one by one (think PTC heaters, inverters, or converters), and confirming faults on real components pulled from problem vehicles. Demos on the EV-400 show exactly how a simulated LOI drops the system offline and how methodical testing brings it back—proving these aren’t abstract codes but real threats that demand precise, repeatable skills. With EVs and hybrids stacking up in bays and no sign of slowing, mastering LOI diagnosis prevents stranded customers, avoids guesswork repairs, and builds the confidence techs need around high voltage where one wrong move isn’t an option. Trainers like the EV-400 and Tesla cutaway turn these procedures into hands-on muscle memory, prepping the next wave for shops where isolation faults are routine, not rare.

Ready to build an industry-driven training program that gets students diagnosing xEV loss of isolation like pros? Reach out to a DAKTIC representative at [email protected] to discuss tailored solutions.