So I killed something - ETA rewire gone wild - PeachParts Mercedes-Benz Forum

emerydc8 · #1 06-29-2010, 01:10 AM

I am certainly no guru, but here's my two cents:

I think there is a reference potentiometer inside the ETA that controls the idle. Maybe you could have disturbed it in the process of rewiring. If the ref pot goes bad, I read that they are not sold anymore. Is there any way to pull the codes?

If my ETA went bad, I would consider looking for the dealer who would sell a new one at the lowest cost. By the time you wait for someone like 4mercedes to rebuild it, and then take the chance that the rebuild is DOA (it happens), it's probably not worth the down time.

deanyel · #2 06-29-2010, 12:18 PM

And you took it off the car to do this? It sounds to me like the off/on process could be the problem, or that you've disturbed failed wiring inside the ETA.

latief · #3 06-29-2010, 12:58 PM

Quote:

Originally Posted by emerydc8

I am certainly no guru, but here's my two cents:

I think there is a reference potentiometer inside the ETA that controls the idle. Maybe you could have disturbed it in the process of rewiring. If the ref pot goes bad, I read that they are not sold anymore. Is there any way to pull the codes?

If my ETA went bad, I would consider looking for the dealer who would sell a new one at the lowest cost. By the time you wait for someone like 4mercedes to rebuild it, and then take the chance that the rebuild is DOA (it happens), it's probably not worth the down time.

I will pull the codes....

The only thing i did (maybe wrong) is to rotate the gears inside by hand to check for functionality/cleanness/lube....etc.....other than that, everything looks fine?!

is that what caused this?

JimF · #4 06-29-2010, 01:50 PM

It's very possible that the ETA had failed . . ref pot, clutch solenoid, etc . . and rebuilding it made it worse.

Also has the engine wiring harness been replaced?? If not, that does need to be done asap. The bad harness could have caused damage to a ECU.

After the w/h is replaced and if the ETA still doesn't function, it needs to be tested and inspected to see what's wrong. Beckmann is one place that can test it. See Menu#24 . . direct link: http://www.k6jrf.com/MB_asr.html They may be other places also.