DME re-adapted

[97m34]

So i was told to have my DME re-adapted and did not want to $90+ from the dealer ship. So my good friends mech. told me to discharge the capacitors by pulling the neg off the batt. and touch it to the posi. In a sence its the same....

does this so ok to do????????????

[Shuasha]

What do you think re-adapted means?

[97m34]

What do you think re-adapted means?


Well how does that answer my question. Just a little worried by touching the neg. to the posi.

[Neil]

Your good friend needs a new mechanic.

And, no, that won't work.

Neil

[97m34]

Your good friend needs a new mechanic.

And, no, that won't work.

Neil


Thank you :)

[a32guy]

Well, what the mechanic said is true-- It would discharge any current left throughout the electrical system. However, not such a good idea on any car made after ~1985 IMO.

[Bigsalgt]

I don't even understand the question! What do you mean re-adapt? Clear codes, CEL etc. ?

[BMWManiac]

I don't even understand the question! What do you mean re-adapt? Clear codes, CEL etc. ?

He's talking about aligning the EWS....I had to pay the dealer to get it done.

[97m3john]

disconnecting both terminals and touching them together will reset adaptation

[Neil]

disconnecting both terminals and touching them together will reset adaptation

Not on OBDII.

[97m3john]

Oh ok sorry.I know my obd1 does,G/L

[bloxsom]

Well, what the mechanic said is true-- It would discharge any current left throughout the electrical system. However, not such a good idea on any car made after ~1985 IMO.


Its true, the tech. konws what hes talking about. just do it! ^^^^^

[KpmackM3]

Take it to the dealer. That $90-$100 bucks much better that a shade tree repair that could f up your car.

[a32guy]

Its true, the tech. konws what hes talking about. just do it! ^^^^^

What are you talking about? :shifty

[Neil]

Its true, the tech. konws what hes talking about. just do it! ^^^^^

As detailed in a long-ago post by Jim Conforti, the adaptation values on a OBDII Siemens ecu are stored in flash memory (or somesuch). In any case, discharging the capacitors will have no effect.

Neil

[STOLI311]

It may depend on the vehicle. I know in regards to Fords that there is reset adapt. and hard reset adapt. Basically even with a scanner if you reset adapt. It will not reset everything, one being baro on maf so procedure is hard reset where you take cables off and touch them together. Again just some manufacturers.

[ProjectP]

Well, what the mechanic said is true-- It would discharge any current left throughout the electrical system. However, not such a good idea on any car made after ~1985 IMO.

Its fine on new car, bmw routinely does it on brand new 7s, 5s etc. It helps with software and programming lock ups. They call it a "battery reset"

[paul e]

Its fine on new car, bmw routinely does it on brand new 7s, 5s etc. It helps with software and programming lock ups. They call it a "battery reset"

Long Term Fuel Trim values are stored in flash memory just as Neil said. It is no longer stored in Volatile ram that can be erased as you suggest. Show us where it says this method of resetting adaption on OBDII cars can be done.

[a32guy]

I never said that would reset anything. But the mechanic is right, it will discharge any power left in the electrical system.

[ZimDoc]

Well, what the mechanic said is true-- It would discharge any current left throughout the electrical system. However, not such a good idea on any car made after ~1985 IMO.

Ah hint hint....

BMW Techs do this almost daily to do a control module reset if one isn't responding. Take the Neg. off. Take the Positive off the battery. Touch the 2 together or let the car sit unconnected to the battery for over an hour, some times even for 24 hours.

P.s. The guys from NJ (Big wiggs) tell us to do this in diag for some problems.

For an E36 all it will do is maybe reset adaptation valves. But thats a maybe. Edit: Not for OBD II cars, only OBD I.

Your car will adjust for that is going on with out doing any reset at all.


Its fine on new car, bmw routinely does it on brand new 7s, 5s etc. It helps with software and programming lock ups. They call it a "battery reset"

I am guessing your a BMW Tech too. :D

[Shuasha]

Well how does that answer my question. Just a little worried by touching the neg. to the posi.
Reason I asked (and it was answered eventually), is that you didn't really know what you were wanting to do. Aligning the EWS requires special software and has nothing to do with draining capacitors. It aligns the serial number of the ECU with the EWS module. :)

[Bigsalgt]

He's talking about aligning the EWS....I had to pay the dealer to get it done.
I don't think he is talking about the EWS being aligned! The adaption part of the DME has to be cleared by someone with the ability to do so! My adaption was cleared by Active Autowerkes prior to the second re-tune. It was later completed by ICS after upgrading to Nick G.'s software! George was also kind enough to align the EWS at the same time! I wouldn't take the chance of conducting this method unless your completely sure it will not harm any component of the vehicle!

[ZimDoc]

Reason I asked (and it was answered eventually), is that you didn't really know what you were wanting to do. Aligning the EWS requires special software and has nothing to do with draining capacitors. It aligns the serial number of the ECU with the EWS module. :)

The Dealership will do this for about an hour of time, so at around $120. They have the tools.

[RRdawho?]

Or you can bypass EWS.

[Shuasha]

The Dealership will do this for about an hour of time, so at around $120. They have the tools.
Yeah, I got lucky and they only charged me 1/2 hour.. it takes them literally 5 mins, including swapping the ECU.

[ZimDoc]

Yeah, I got lucky and they only charged me 1/2 hour.. it takes them literally 5 mins, including swapping the ECU.

Yep. I have done that for people before.