How to control JVC KD-X310BT car radio with Steering Wheel Remote?

Question

Electronics

There is a car radio JVC KD-X310BT .
The radio has an interface for connecting to the buttons on the steering wheel through a special adapter. One wire, labeled "Steering Wheel Remote" on the wire.
The question is how to control the radio on this wire? Any information. I haven't found anything yet.
Whether the interface was on the radio, as it used to be, for example, two wires, between which the resistance was measured and thus it became clear which of the resistive buttons was pressed, and then the necessary actions were performed.
I want to take a microcontroller and control it with a radio, but the protocol is unknown to me and I can’t find it anywhere yet.
Special adapters are sold, they cost more than the radio itself. But I still cannot afford to buy and carry out reverse engineering.

Answer 1

So, but nothing has changed:
https://hackaday.io/project/3078-holden-viva-steer...
https://en.wikipedia.org/wiki/Local_Interconnect_N...
https://github.com /theksmith/CarBusInterface

Answer 2

There is a list of commands for JVC KD-R531 here. I think they should fit.
Taken from here . I'll try with my JVC KD-X310BT - I'll write it off.

Answer 3

This Vkontakte community has the necessary information on various car radios and buttons (and even motorcycles). There you can also buy an adapter for steering wheel buttons for non-standard radio tape recorders