[BiturboS4] 2nd Battery in 6 mos.

California Fields cfields72 at hotmail.com
Fri Jan 10 14:21:28 EST 2003

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I, too, left my S4 undriven for about 2.5 weeks over the Christmas/New YEar's
holiday and it started up just fine when I returned. Haven't had a  battery
problem in the 6 months that I"ve owned the car.  Granted, it doesn't get
below 45 degrees here in San Fran, but I don't think temp is the issue.
Carter Fields, San Francisco
Miltek 3" cat-back
Strat. shifter
Strat. HyperBoost DVs
A-pillar boost gauge
>From: Ti Kan
>To: dano at well.com (dano)
>CC: biturbos4 at audifans.com (Bi-Turbo Audi S4 Audi Fan Group)
>Subject: Re: [BiturboS4] 2nd Battery in 6 mos.
>Date: Sun, 5 Jan 2003 12:26:24 -0800 (PST)
>I have left my S4 undriven once for over a month (went on vacation)
>and it started right up after I returned, so there is nothing intrinsic
>in the S4 that should drain your battery.
>To check for total current drain, you need a good multimeter with
>current (amp) scale at least 5A (or else risk damaging the meter).
>Be sure you have the radio anti-theft code to unlock the radio
>Disconnect one of the battery leads and insert the meter into the path
>between the battery lead and the battery post. It should be a small
>miniscule amount when the car is parked with all accessories off (DO NOT
>try to start the car and be sure key is removed from ignition and all dome
>lights are off). A small amount of current flow is normal for such things
>as the clock and remote/alarm circuitry, but I don't expect anything
>over 80mA. That's just a figure I pulled from a hat, I don't know what
>a typical S4 should drain while sitting quiescent.
>If you have significant current flow, then remove the meter from the
>battery, re-connect the battery normally, and then pop open the fuse
>box cover on the side of the dash. Again be sure all accessories including
>dome lights are off, and remove one fuse at a time and insert the multimeter
>probe in its place. Look for the circuit that has the current drain in it.
>When you have narrowed down to which circuit, when determine which
>items are on that circuit and debug it further. Your owners manual should
>list the items but you will probably need the wiring diagram at this point
>for the car to do this effectively.
>http://www.bentleypublishers.com sells service manual for the S4.
>If your car is still under warranty, your dealer should be doing all this
>for you.
>2003 A4 1.8T multitronic
>2001 S4 biturbo 6-sp
>1984 5000S turbo
>1980 4000 2.0 5-sp
> /// Ti Kan Vorsprung durch Technik
> /// AMB Laboratories, Sunnyvale, CA. USA
> /// ti at amb.org
> ////// http://www.amb.org/ti/
>dano writes:
> > With that degree of electrical drain on successive batteries I think
> > it's pretty certain.
> > I used to know how to test for this, but can't remember. Check with
> > an independent auto electric shop.
> >
> > At 3:48 AM -0800 on 1/5/03, Aurangzeb M. Agha wrote:
> > >Thanks for the advice JY. I plan on doing just that. Very bizarre issue.
> > >I wonder if there's something in the S4 which could be causing a battery
> > >drain?!
>BiturboS4 mailing list
>BiturboS4 at audifans.com

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