Access denied: Golf V engine control unit (ECU) BLS

Hello, I'm unable to access the body control module (BCM), specifically address 09. An aftermarket double-DIN radio and xenon headlights have been installed. Do you have any solutions?

Quote:

install a double-DIN radio retroactively

.

With a backyard CAN adapter?

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Hi,

Quote:

With a backyard CAN adapter?

We'll disconnect the radio for now and see what happens.

Was was previously an RNS unit installed there, right?
Which one?

Because the radio and navigation system are not accessible.

He didn't want to disconnect the radio, but I'm 100% sure that's the problem. Yes, it had an RNS system with navigation, but I don't know the exact model. These are two brothers who have almost identical Golfs. Today, I tried to reprogram something in the car's onboard computer system on the Golf with the aftermarket radio, but it was impossible.
Then we went to the other golf course, and it worked there, although I'm not a fan of the American-style outdoor lighting. Well, it's just a matter of taste, I guess.
I told the person with the non-original radio that he needs to get a VW CAN adapter as soon as possible (it costs about the same as the Chinese radio ), or disconnect the corresponding diagnostic cables from the radio (there might already be 12V+ connected incorrectly to the diagnostic cable ), so that nothing else breaks.