Hard to believe it has been 3 years since I posted on this. Car went in and out of driving rotation and fixed a bunch of other things on it. Never found an electrical issue and ECC deteriorated to barely working, except would come on at temperatures above 95 deg and work for 20 min. Long story short...

Just a quick update as have not dedicated much time to this as the darn thing does work when I need it the most, as in afternoons in Texas. I changed the battery and it made absolutely no difference. I believe this will come as no surprise to anyone. Got a new multimeter for Father's Day and look fo...

Thanks again Misha, Sent you a PM with the email. I think running codes is a smart thing to do and really am thankful for your offer. Hope I can still track down a cable via ebay, amazon, or others. I see amazon has VAG-Com KKL cables with a USB interface, but not the serial. I've seen mixed results...

Update: but not solved. Got a new circuit tester that has a built in voltmeter via Amazon. Kind of cooler than the old incandescent bulb I've had so many years. So when I tested yesterday morning, at a cool 71 deg F, and the key on but engine not started; fuse 31 and fuse 5 had battery voltage on bo...

Thank You Misha, Appreciate not wasting any time on fabricating a LED code reader. Update: I have learned 2 things. 1. Old electronic diagnostic equipment fails. Who would have guessed that my 25 year old Craftsman Multimeter and my 45 year old 12 volt circuit tester would both simultaneously self d...

Good advice, thank you. Have seen posts elsewhere that some 98's could be queried with flash codes; thought that might be too good to be true.

Sounds like I will start with step two in my list above.

Thank you to all! That is correct that it doesn't have power at all until 20-30 minutes - or - outside temperature greater than 86 deg. I'm afraid I may have gotten the wrong ECC as I just grabbed the best looking one out of a junkyard V70 T5 (same body style) and didn't pay attention to the year. M...

Hi,

Thanks so much for responding. Car is running great but I am open to checking anything out. Just the Electronic Climate Control (ECC) that is working intermittently.

T

Greetings, First time posting here but have been grateful for the info on this site over the years. I have a 98 S70 T5 I bought brand new and picked up at the factory, which now has 190,000 miles and went through my wife, me, 2 boys, and back to me again. Been having problems with the ECC but finall...