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FrankM54 avatar FrankM54 commented on August 12, 2024 1

Starting in 2018, FCA added a "Secure Gateway Module" (SGM)
image

I don't have the full details, but it is my understanding that the SGW authentication process takes place on the Chrysler servers.

So you can't connect to the CAN bus via the OBD port.... BUT if you use a wiring diagram you can connect to one of the CAN busses AFTER the SGM.

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buglinjo avatar buglinjo commented on August 12, 2024

Ohh, that makes sense... Kinda sucks though... Wanted to disable this stupid auto start/stop feature :( That explains why people do not sell OBD port disablers and you need to tap into wires directly. Thank you for the explanation!

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buglinjo avatar buglinjo commented on August 12, 2024

This document says that all CAN data is available through the OBD-2 connector. Am I doing something wrong?

http://www.racelogic.co.uk/_downloads/vbox/Vehicles/Other/Docs/Alfa%20Romeo-Stelvio.pdf

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FrankM54 avatar FrankM54 commented on August 12, 2024

I really don't know...
To verify your setup, try it on a friend's car.

Maybe the VBOX folks know how to authenticate / get through the SGM?

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