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Discussion Starter · #1 ·
2000 Passat 1.8T

Can I save the data stored in the computers by providing 12v through the cigarette lighter or do I have to provide power through the OBDII port?
 

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Any of the three power outlets will do it. They aren't switched.

But be sure you're really providing 12 volts. Many "memory savers" use a 9 volt battery, which our cars don't get along with.
 

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There is no reason to save the memory when you disconnect the battery. You just need to run a TBA when it is re-attached.
 

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Discussion Starter · #4 ·
There is no reason to save the memory when you disconnect the battery. You just need to run a TBA when it is re-attached.
That would depend on how familiar the person is with Volkswagen, would it not? some would not have the required special tools or knowledge to do a Throttle Body Alignment. That includes me....:)
 

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2004 GLS 1.8T
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That would depend on how familiar the person is with Volkswagen, would it not? some would not have the required special tools or knowledge to do a Throttle Body Alignment. That includes me....:)
I've never had to do a TBA on my 2000 when disconnecting the battery - or my 2004, for that matter. All I lost was the clock and window auto-up settings.
 

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On the DBW engines, you don't need any tools.
Open hood, open door. Turn key on to run ,but not start. Wait 2 minutes, start car.

I've had a couple of cars (mostly 1.8T) that needed a TBA after the battery was disconnected (usually for a timing belt change). Maybe 5 out of 100, but I do them all just in case.
 

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FYI NOTE: The only time it is safe to use a memory saver is when replacing the battery.
NEVER use one while working on the car, it defeats the purpose of disconnecting the battery.
It is never practical to use one.
 
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