The Outcome (Part 2) of "Audi just shuts off no warning while driving and won't restart"

[Huw Powell]

On 8/16/2011 11:47 PM, Marc Boucher wrote:
> I'm still curious why they'd replace the coil if they identified the
> problem as a defective ground wire at the ECU. Is the ECU grounded in
> the passenger compartment, or via a ground wire on its harness?

You have a 20-odd year old car.  Buy the Bentley shop manual on eBay, it 
has all the schematics.

Did they show you an old coil with issues when you picked the car up?

> On the way home, the check engine light came on, then went out 30
> seconds later. When I got it home, I pulled the following codes:
>
> 2312
> 2232
> 1111
> 2411
> 2411
> 2132
> 2122
> 2123
> 2312
> 1111
>
> I don't know if the bad grounding of the ECU made it give out spurious
> signals. So I'll clear the codes tomorrow and watch to see which ones
> come back.
>
> --------------------------------------------------
> From: "Huw Powell" <audi at humanspeakers.com>
> Sent: Tuesday, August 16, 2011 10:59 PM
> To: "Marc Boucher" <mboucher70 at hotmail.com>
> Cc: <quattro at audifans.com>
> Subject: Re: The Outcome of "Audi just shuts off no warning while
> driving and won't restart"
>
>> Sounds like you got out cheap, and thanks for posting the resolution.
>>
>> The formatting on the invoice/report looks like it might be the same
>> software Carworks uses, though perhaps the Windows version...
>>
>> On 8/16/2011 10:37 PM, Marc Boucher wrote:
>>> I picked the car up tonight. It was late, and only the receptionist was
>>> there, so I didn't speak to a mechanic. But the bill is somewhat
>>> detailed. Here's what is says:
>>>
>>> REPLACE IGNITION BOOSTER
>>> Temporarily install ordered ignition module, sill no-start.
>>> Check wiring from ignition distributor coil and ignition ECU.
>>> Determine ground signal wire from ECU not functioning.
>>> Repair ground wire and roadtest to check.
>>>
>>> All of that was only 1/2 hour of labor, which is pretty good in my view
>>> for a non-audi shop. I can't imagine getting all that done in 1/2 hour.
>>> Then again, on the day it arrived they charged 0.8 hours labor to
>>> "verify cranks but doesn't start".
>>>
>>> That's all the labor. For the parts, they've charged me $61 for an
>>> ignition coil. Not certain why they'd charge me for an ignition coil if
>>> the problem was a ground signal wire. When I can see it in the daylight,
>>> I just want to verify that there is in fact a new coil in place.
>>>
>>> MC
>>>
>>>
>>>
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>>
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