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AV-SCANNER / IMMO guides / Keys
This guide explains why a key fob remote loses range and only works when held close to the vehicle, covering the underlying radio and immobiliser principles without revealing any bypass methods. It is written for lawful owners and the technicians they employ, so it puts proof of ownership and authorised repair routes first. You will learn how to diagnose common causes such as battery depletion, antenna placement, interference and physical damage, and how to choose between dealer service and a registered automotive locksmith. By the end you can verify a repair, spot scams and take practical steps to prevent the problem from returning.
Guidance is general and covers many makes. Exact procedures and values vary by model, so confirm them in the factory service information for your vehicle.
Download all 12 sections as a branded PDF to use in the workshop.
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