Hi,
That is an interesting one. Because of the electronics involved, I feel the best place to start is by scanning the can-bus system.
CAN stands for controller area network. Basically, the different modules are tied together via a few wires. This type of scan will retrieve codes regardless of the module storing them.
Here is a link that explains how it's done:
https://www.2carpros.com/articles/can-scan-controller-area-network-easy
Let me know if this is something you can do or have done.
Take care,
joe
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Tuesday, February 21st, 2023 AT 9:13 PM