Body Control Module Reset

[bobby1]

Hi
New to this forum, but all interior courtesy and map read lights failed on our 2019 wheelchair accessible Caravelle Exec. When van at VW garage today apparently no fault codes came up on diagnostic check and they couldn't find anything amiss with lamps, wiring, connectors, switches etc. Eventually they did the battery terminals off trick and hey presto lights back on when terminals remade. Can anyone tell me if it's possible to do a BCM reboot, say using VCDS, without having to disconnect battery? Got a very cagey silence when asked this question at VW.

 

[Loz]

That is the simplest way, so if it works...

Welcome by the way ..

 

[bobby1]

Hi Loz
Thanks for that quick reply, and the welcome too.

I guess that by producing a complete power supply failure it doesn't introduce any traps for the unwary that need a VCDS to correct/set up? My marine background tends to make me slightly dubious of "simple fixes", no disrespect inferred here.

 

[Dellmassive]

like @Loz said . . . No soft reboot,

The only way is a Hard reset/Capacitive discharge

see here > Full Van Ecu Reset (capacitive Discharge) -- How I Done It --

.

 

[keith baker]

I did the hard reset as suggested by @Dellmassive and have had no problems. Just had to reset power windows and clock.
Still get rubbish mpg and H4 lights are still crap

 

[bobby1]

Thanks Guys. Got vehicle back now and all appears ok, well apart from electric seat position memory loss!!!!