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Re: quattro-digest V1 #177
This technical bulletin could be a possiblity for you. It does not
address resetting the TCM, but it may be a reason why your trans
goes into failsafe, as does the one on my '93 90S. I just discovered
this TSB and haven't had a chance to investigate it. It basically
says that all 097 4-spd autos may have this problem caused by a
bad ATF temp sensor. You need a PDF viewer to read it.
Transmission, Erratic Shifting, No DTC's Stored - Sep '97
Another lister once told me they had heard that the only way
to "reset" the TCM was to unplug it/replug it. There probably is
more to it than that but it also would likely require a special
Audi tool; their ubiquitous Scan Tool maybe?
Good luck. Keep my name around if you find a solution. I'll let
you know if I do to.
> Date: Tue, 29 Jun 1999 15:19:01 -0400
> From: email@example.com
> Subject: 91 100 Auto Trans TSB's
> Anyone have access to Audi Technical Service Bulletins? or know about
> this problem?
> I'm looking for the following TSB's that relate to auto transmissions
> for a 91 100:
> 379304 Jun-93 Transmissions shifts Erratic/Hard
> 379108 Dec-91 Harsh Shifting- Transmission into Limp Mode
> 37911 Jul-91 AG4 - Transmission Shifts Erratic/Hard
> D39102 May-91 Resetting Transmission Basic Setting
> Flipping through my owners manual, I noticed that if there is a
> "fault" in the auto trans control module, the transmission will go
> into "failsafe" mode and will either a.) shift roughly or b.) require
> manual shifts through the gears by moving the lever.
> I've also read in the Dyment manuals that each time you disconnect the
> battery, you'll have to reprogram the transmission control module
> The auto trans in my '91 100 shifts roughly and I have had the battery
> disconnected. Has anyone experienced similar problems? Anyone know how
> to reprogram the transmission control module without a visit to the