201: 2020 Ford Fusion Intelligent Access Failure
About this episode
A detailed diagnostic walkthrough of a 2020 Ford Fusion that wouldn't start or respond to its smart key system unless the key was placed in the backup transceiver. The host explains the smart key system's operation, focusing on the body control module (BCM) and radio transceiver module communication via a LIN bus. Using specialized diagnostic tools, the issue was traced to an open LIN bus wire between these modules. The episode highlights the complexity of modern keyless systems and offers insight into troubleshooting communication faults without immediately replacing parts.
In this episode I share the diagnosis of a 2020 Ford Fusion that doesn't seem to recognize the smart key to turn on the ignition or any key-less entry functions. I'll describe system operation and my thought process through the diagnosis.
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Ford Fusion
"...want to share a diagnosis with you on a 2020 Ford Fusion that wouldn't start and would not key up. I thoug..."
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