From Bad Grounds to Bricked Modules: Real-World Diagnostic Lessons [E257]

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Recorded live at ASTA 2026 in Raleigh, North Carolina, Matt Fanslow sits down with Tim Iezzi, Ira Waldman, and Chris Farley for a conversation about diagnostic training, module programming, and the realities of fixing cars.

The group shares wrong turns, software headaches, and those uncomfortable moments when a vehicle drove into the bay but suddenly won’t start. They discuss why effective training includes the mistakes along with the successful repair, and why a repeatable diagnostic process matters more than an unusual case study.

From frozen progress bars and constantly changing software to wiring diagrams and working in an icy parking lot, there’s plenty here that technicians will recognize.

Topics discussed

Teaching diagnostic process through real cases, including the steps that went wrong.No-start diagnosis and getting sidetracked by an assumed immobilizer problem.Power probes, testing mistakes, and understanding what your test actually proves.Programming anxiety, patience, and the temptation to interrupt a stalled-looking session.Changing OEM software, authentication requirements, and the challenge of keeping procedures current.Software conflicts, dedicated laptops, updates, and backup equipment.Printing and marking wiring diagrams to make complex circuits easier to follow.Preparing for mobile diagnostic calls and adapting to conditions outside the shop.Remote programming, internet latency, and connection reliability.

Thanks to our Partners, Pico Technology and Autel

Are you chasing elusive automotive problems? Pico Technology empowers you to see what's really happening. Their PicoScope oscilloscopes transform your diagnostic capabilities. PicoAuto.com

From drivability diagnostics and TPMS service to ADAS and advanced safety systems, Autel helps technicians follow OEM procedures and repair with confidence. Autel.com

Contact Information

Email Matt: mattfanslowpodcast@gmail.comSubscribe on YouTube: @automotivefieldtheory

The Automotive Repair Podcast Network: https://automotiverepairpodcastnetwork.com/