Need help: Problem connecting to ECU with Vag...
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Need help: Problem connecting to ECU with Vag...
My car all of a sudden refuses to connect to my ProDiag (Palm-based scanner like Vag-com). I keep getting "ECU not present or not responding" after it retries a couple of times. I've used the ProDiag for several years without problem.
History: After I unplugged the MAF and caused the ESP warning to light up this morning, I turned the car off, plugged the MAF back in, cleared the code and drove to work. When I got to work I wanted to see the fuel trim numbers, so reconnected the ProDiag but couldn't connect to the ECU. I thought it might be a loose cable, but no amount of wiggling or reconnecting it helps. The car runs fine, no CELs. I just checked the scanner on my wife's Passat and it works fine, so I know the Palm, the software and cable are Ok.
I checked fuses and disconnected the battery for about 10 mins hoping to reset things, but no change. <b>What can I check now? How do you check the car when it won't let you check it?</b>
~john
History: After I unplugged the MAF and caused the ESP warning to light up this morning, I turned the car off, plugged the MAF back in, cleared the code and drove to work. When I got to work I wanted to see the fuel trim numbers, so reconnected the ProDiag but couldn't connect to the ECU. I thought it might be a loose cable, but no amount of wiggling or reconnecting it helps. The car runs fine, no CELs. I just checked the scanner on my wife's Passat and it works fine, so I know the Palm, the software and cable are Ok.
I checked fuses and disconnected the battery for about 10 mins hoping to reset things, but no change. <b>What can I check now? How do you check the car when it won't let you check it?</b>
~john
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