VCDS - communication error

[willg54]

I'm having a few problems with VCDS, it can connect to a few controllers like ABS etc but not the engine ECU. it comes up with "too many communication errors to continue" and looks like this



ideas anyone? i've tried changing com ports etc but no luck.

[Greg_S]

Have you made sure the com port isnt conflicting with another device?

[bikerjim]

I would try the "turn It off then back on again" approach, I.e. Pull the ecu or fuse for it and see if it makes a difference. Not very technical but might be worth a shot.

[willg54]

I've tried all sorts of comm ports, not sure how to tell of they're conflicting.

Also tried the on off method, yet to the hit it with a hammer method, but don't think that will help!

Sent from my HTC Desire using Tapatalk 2

[brianb]

is this a genuine version or a dodgy one?

[prj]

Try to connect to another car.
If on another car this works, and doesn't work on your ECU... well then someone might have messed up chipping it.

[SteveH]

The cheap Chinese copies often suffer from this problem. I'm sure I've read somewhere that if you reduce the baud rate it can impvove the communication issue. I can't find the instructions on what the best settings are though...sorry!

[prj]

The cheap Chinese copies often suffer from this problem. I'm sure I've read somewhere that if you reduce the baud rate it can impvove the communication issue. I can't find the instructions on what the best settings are though...sorry!

You can't "reduce baud rate". The ECU communicates at 9600 baud. Send at any other baud rate and you will not get anywhere at all...
Well of course you can try 187500 on the secret Bosch protocol, but VAG-COM can't do that.

It's either a dodgy cable or a dodgy ECU.
Only one way to find out

[willg54]

Cheers all!

I'll try all your suggestions on Friday.

I don't think there's aby issues with the car, would be just nice to know.

Sent from my HTC Desire using Tapatalk 2