Fault Code Diagnosis (was Coolant Leakage Solved-BUT)

[Brett Dikeman]

On Aug 2, 2005, at 5:55 PM, n-engelbert at terrans.net wrote:

>> Sounds like my guys may be lower primates, no?
>> Can any modern hardware & software pull these correctly or does one
>> need a 1551? The shop I'm going to talk to tomorrow claims to have a
>> setup that will do Audis along with other makes. Please advise.
>>
>
> Just need a LED and a 330 ohm resistor in series and a jumper wire.

The fault code light method will not distinguish or even indicate  
faults the Motronic considers intermittent.  VAG-COM, Prodiag, and  
all the VAG factory tools will not only dump all the codes, but it  
will also display whether the fault was intermittent or not.  The  
scan-tools will also allow you to read block values to see a few  
important sensor and adaptation values.

As a side note, when my aux coolant pump cracked and started leaking,  
I had similar problems with the car running very poorly under all but  
the slightest load; it also seemed like there was a 'dead' spot on  
the throttle, right above idle...go a little bit more, and then you'd  
get a noticeable increase in power.

It went away with the new pump and a "burp" (parked the car on a  
steep incline, idled it without the reservoir cap until it was warmed  
up quite a bit).

Brett
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