Key-USB: No response from Controller

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   #1  

AudiTex

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Purchased a Key-USB module from Ross-Tech many years ago and it worked perfectly with my 2000 A6 and 1998 Cabrio. Now have a 2012 Q5 too. Tried to use it now with a Windows 10 laptop, downloaded the latest software, selected the "legacy" interface drivers for USB, and everything looks correct on the screen as before. It finds the interface and the red LED is lighted when plugged in to the Q5 or A6. However, when I select one of the tabs (e.g. engine) I get the "no response from controller" now. I have reviewed the other threads on this topic and checked the laptop (Lenovo with AMD A6 CPU) and do not find any issues. Any thoughts on this one? Thanks.
 
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Eric

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Q5 uses CAN bus for diagnostics, while your KEY-USB only supports K-line. You need a more current interface:
 
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AudiTex

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Thanks for the quick reply. Best regards.
 
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