port test status questionable?

[lpg boy]

have genuine Key Com Ross Tech cable e.t.c. for about 2 years now but it won't 'open controller' on either my B4 or B5.5 passat ,even though it had no problem in the past , engine, abs electrical etc.
Thought laptop glitch has upset how it was communicating so did a port setup test to check - following was displayed in an overpage:

port status o.k.
interface found
type ross-tech key-com v3.01

status questionable
K1 short to ground
K2 short to ground
CAN not supported

the dongle does not have a fuse in, just a board of electronics.

I did try and read a corrado which it wouldn't but later found it had been 'chipped'. Could this have upset something ,if so what is the cure?

[rombonie]

Might be this

http://www.ross-tech.com/vag-com/aftermarket-radio.html

[Uwe@Ross-Tech]

I doubt this is an aftermarket radio problem because that would show up as "K1 short to +12", not both K-lines short to ground.

I would try another car, and if possible, another PC, but it sounds like that interface may have failed.

A chipped car cannot kill an interface, but most Corrados have the old-style "2x2" diagnostic connection can cause problems if, for example, somebody uses an improperly wired adapter and gets power and ground reversed.

If the interface has indeed failed, we do have a flat rate repair/replacement program. lpg boy should e-mail support@Ross-Tech.com.

-Uwe-

[lpg boy]

for information now:
contacted ross-tech 'dongle has malfunctioned', not with an aftermarket radio issue. This shows up differently, and they are thermally protected these days.
unit is out of warranty being 2yrs+ old.
have offered me an exchange/upgrade deal. Not competent ennough to sort out inherrent problems that are discussed with e-bay connectors so will take up the ross-tech offer. It hurts but I know it will work
thanks for your replies
john