[audi20v] Re: overheating
matt_20v at yahoo.com
Mon Aug 25 15:54:30 EDT 2003
--- Peter Schulz <peschulz at cisco.com> wrote:
> At 01:51 PM 8/25/2003 -0700, you wrote:
> >> From: Peter Schulz <peschulz at cisco.com>
> >> the ECU and Temp gauge get temperature
> information from the Multifunction
> >> temperature sender ofrMFTS, which is on the left
> side of the engine, below and
> >> forward of the distributor
> >Wrong, Peter. Neither the MPI nor the Motronic
> ECUs derive coolent temp
> >info from the MFTS. Both use a dedicated sensor
> located on the back of the
> >You are currently subscribed to audi20v as:
> peschulz at cisco.com
> >To unsubscribe send a blank email to
> leave-audi20v-39500G at rennlist.org
> If thats the case why does removing the lead to the
> MFTS in some cases restore boost (part of diagnosing
> a bad MFTS)?
The MFTS does provide a binary overtemperature
signal to the ECU. Sometimes this signal sticks,
and when active the ECU shuts off all boost.
SJM has a great writeup on this.
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