Dreaded trans. Failsafe prog.
 

Are you asking if I repaired failed DISA for 18¢?

Answer is yes. I'll see if I can find the thread.


https://xoutpost.com/bmw-sav-forums/...disa-20-a.html

Nice! I went the cheap kit route but likely will at least use the Teflon tape strategy.


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Get some fastape brand. It's color changing so you can tell when enough is applied.


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Good idea…

Ok, I have my 03’ 3.0 reassembled but still goes into trans Failsafe. Ending doing a ICV, Testing different MAF, rebuilt DISA, alternator, no effect. Started to re-examine the transmission switch and my old Sears Jack failed on me as I was starting. The timing is not lost on me….still hear my wife’s “be careful” ringing in my ears.

Anyway, my son has claimed he has an INPA laptop but he’s hard to pin down so I may buy a newer code checker. My creator 310+ indicates communication failure when doing ABS/DSC, EGS and anything transmission related.

I’m working my way through symptoms and been through tons of Youtubes looking for the magic bullet.

Thus far I have narrowed to several possibles.

EGs module? Corrosion? Car sits outside and we have had lots of rain. Will try to pull and look for dirty or corroded connections. Some chance a rodent or something damaged a wire. (Popped the hood the other AM and there was a frog on the intake manifold)

Transmission switch? The PRND lights up on the dash but doesn’t change when shifting. Sport mode does not register on the dash. Sport mode shift also seems odd but I don’t ever use it so not sure.

ABS module. Dunno?

Check the trans fluid level.

Wheel sensors and such.

Battery. Replaced the battery with an Autozone cheapy and seems ok (4 months) but I have the one I pulled, may reinstall just for grins.

Most seem to think it’s electrical but so far I’m baffled. I suppose a better scanner would help.

Thanks,
John


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See if you can get into module like HVAC. If you can but not EGS, then get some deoxit pro gold and clean the contacts at the egs module. Your symptoms match bad wiring or bad connector. (or internal fault).

You can open up the EGS and look for corrosion inisde. You may have to drill out rivet I can't remember if it was DME or EGS that wasn't screws. (you can replace with screws).

+1 on some general contact cleaning.

I had symptoms of LCM failure on my e39 530, most likely due to just not driving very much. Went through the process to get a new module, etc. but first I just removed the original one, cleaned the contacts and board with Deoxit, plugged it back in and it's been fine ever since. At least I had a spare.

It sounds counter-intuitive but a good removal and cleaning of contacts once brought back a completely dead old BMW transmission module. Car would not shift, everything lit up, and I simply pulled, cleaned and reinstalled (along with some doing the same on the grounds) and it worked just fine. It's not a bad idea to try.

Thanks, I sprayed Deoxit around (there was zero sign of corrosion) but no help.

Thanks though.


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I'm seen where some module on the same buss shorting out will cause communication errors.

Search for that cause. Look at which / where modules share the same buss.

Also members have had problem where they couldn't connect because the OBD port itself was broken.

Minor update. Raining here so not much I can really do.

My dISA has failed. The flap doesn’t budge with key in pos 2. Getting 12v at the connector but no movement. Looking for a replacement. Wondering if that along could cause electrical glitch? Still getting intermittent all four o2 failure, blessing the DISA is on the same circuit as the MAF.

Idle is fine, drives ok- just around the block.

Dashboard showing PRND but shift position not registering when switching. It used to. Seems to point to a failed position switch?

My scanner locks up when reading anything frommABS or DSC sections. Communication failure.

Was going to check the trans fluid level but my old Sears Jack failed when I got it 1/2 way raised. Scared the crap out of me even though I wasn’t underneath.

Sheesh.


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Have you checked the connector on the back of the transmission?

When mine got filled with water the main symptom was the PRNDL acting odd