When I did the above on my Octavia it was always bringing up fault codes where it was looking for but could not find the radio (no surprise really) but it was fault code city generally & is sold now.

 

I fitted a similar Chinese WinCE unit to the Yeti without thinking through the consequences regarding the standard factory fitted Bluetooth option.

 

The radio works fine but the maxidot keeps trying to connect to previous owners phones and I cant seem to delete them as I think it has to be done via the radio that is now removed.

 

I have no need for the factory bluetooth system, I have a non smartphone with me when I travel and never make calls when driving & very rarely recieve them, I'm quite happy like that. The Maxidot constantly trying to connect to a big long list of phones does bug me though

 

VCDS brings up fault codes with the canbus not being able to communicate with the radio, the radio module not being found (both no surprise) and with the Bluetooth module showing both left and right speakers being short circuited, that I think is because its now connected to a different radio via the existing wiring.

 

Looking through the Canbus module options there is one called "Installation list" and it looks to me if I simply uncheck both "Radio" and "Bluetooth" modules from the list my problems might be over.

 

Is it as simple as that or am I missing something fundamental, I am thinking that I might need to physically disconnect the Bluetooth module.

 

What are your thoughts?

 

It would be really nice after all this time to have a vehicle with no fault codes

Post an autoscan so we can see what you're dealing with.

 

I would unplug/remove the BT module and remove it from the installation list.

 

As for the Chinese radio:

- if it is connected to the CAN-bus, you probably need to leave it in the installation list otherwise it may not work properly

- if you ran a new switched/ignition feed, it can probably be removed from the installation list with no negative effects

 

Assuming you do remove the radio from the installation list and it misbehaves, it's a 30 second job to add it back

 

Thanks, I will have a play tomorrow and do an autoscan at the same time.

 

For some reason even after a couple of years I never manage to get anything into an auto-scan even if I can find where it has been saved, I think the problem has been because I always used the "gateway installation list" scan because it was quicker.

 

I will RTFM carefully and do a scan first and make sure it has the codings etc contained within before doing any changes.

 

Thanks for giving me the confidence to have a play!

My gut feeling on the radio (based on zero knowledge or experience) is that it just interpretes and decodes the relevant data and displays it or reacts to it, speed, door open signals, reverse gear engaged etc etc, I dont see why it would be doing any talking back.

 

Maybe tomorrow we will find out!!!!

I'm not 100% sure, but I believe some need a 'radio on' and 'radio off' signal to function and these are only sent if the radio is in the installation list.

 

It's probably similar to the battery drain issues that are common with old CAN gateways, the signal the radio expects never arrives so it doesn't fully shut down

I will keep my eye open, I already have an LED voltmeter display that is visible from outside the vehicle after shagging a new battery on the old car through the canbus not sleeping.

 

This journey will be worthwhile just for the learning even if it doesn't achieve anything.

Had a VCDS session today and can report that once again the VCDS Meister was spot on!!

 

Here is the auto-scan (I hope) before doing any recoding with the OE radio removed and the Chinese head unit fitted:

 

 

Scan-TMBMC75L6F6053795-20201008-1502-143940km-89440mi.txt

 

Took me ages to even find the bloody file and now it wont show on the posting, I hate feckin computers, had VCDS for a couple of years now and have only just mastered how to do a scan properly, I have an icon on the desktop with them in and can find them there easily enough.

Edited 8 October, 20205 yr by J.R.

Anyway to avoid confusion I will describe the changes and the results, too much grief trying to find the right scan (the file description does not contain the info i put in to identify each one).

 

I disconnected the Bluetooth module & then scanned, sure enough no communications, I then removed the module from the installation list in the Canbus module, cleared fault codes, scanned again and all is well, it does not appear to be trying to connect to phones but I have not driven it yet.

 

Then I removed the radio (module 56) from the canbus module installation list and did the same again.

 

Now it shows (cant recall the words ) but cannot communicate and the Canbus module is showing an "incorrectly coded" error code. This was exactly what happened on my Octavia when I was playing around doing similar stuff.

 

This might be the scan, am getting them all mixed up & dont know where this will appear on the page, - its appeared at the bottom of the page.

 

I think Langers was spot on, the radio is taking the canbus info (its still functioning fine) and also sending something out, the cars canbus recognises it as a signal from a radio but cannot interpret it, maybe because I removed "Radio" from the installation list, so a radio trying to talk to a canbus module that has no radio listed must be "incorrectly coded"

 

I will try to put up the last scan of the current programming:

 

 

Scan-TMBMC75L6F6053795-20201008-1521-143940km-89440mi.txt

 

I will keep an eye on the battery voltage and reinstate the radio on the installation list if there is a problem, it switches off as it did before.

Scan-TMBMC75L6F6053795-20201008-1516-143940km-89440mi.txt

Edited 8 October, 20205 yr by J.R.