Fusebox internals - map/diagram

[Ben Swann]

Cody,

What do you use for a logic probe?  

I don't seem to have great luck with my multi-meter, but maybe I'm not doing it right. 

Ben

-----Original Message-----
From: John Cody Forbes [mailto:cody at 5000tq.com] 
Sent: Sunday, September 26, 2010 7:54 AM
To: audi at humanspeakers.com
Cc: Ben Swann; quattro at audifans.com; 200q20V mailing list
Subject: Re: Fusebox internals - map/diagram

Absolutely correct. It's still worthwhile. 5 bad coils are pretty unlikely, so if you've
got NOTHING this is at least as good as checking a plug wire with an inductive meter or
timing light. 

POS = Power Output Stage. The early VAG coil on plug cars have them. It's a small pack
of transistors so the current flow to power the coils doesn't flow through the ECU. An
AAN has two of them, they have three coil circuits each.

-Cody (mobile)

On Sep 25, 2010, at 11:58 PM, Huw Powell <audi at humanspeakers.com> wrote:

> That tests the ECU and whatever POSs are.
> 
> It doesn't actually "check for spark", though.  Bad coil, bad plug, drowned spark, you
wouldn't find them, right?
> 
>> Just use a logic probe to back probe the coil connector for checking 
>> for spark. If the signal is getting to the coil then the ECU is doing 
>> it job as well as the POS's.
> 
> 
> --
> Huw Powell
> 
> http://www.humanspeakers.com/audi
> 
> http://www.humanthoughts.org/