Bawareca
Posts: 48
Joined: Wed Apr 12, 2017 6:40 pm

Re: Help: supplier for electrical machine electronics in i3

Wed Apr 12, 2017 9:21 pm

Thank you. After a not very heavy front end accident the positive wire of the vacuum pump for the brakes touched the chassis. After the pump was reconnected it working all the time, even with the ignition off. After extensive testing and even programming the EME it was determined that the root cause is hardware fault in the EME control board.
I do diagnostics and electronic repairs for German cars for living, but there is no usable info for the i3 except what is provided by the factory. According to BMW, they sell the EME as a complete part and replacing it includes dropping the whole rear axle. I took my chances and was able to open the EME and remove the control board only by dropping one corner of the rear axle around 2". Of course the part that had to be replaced was not available from any sources, but after some experimenting with cross referenced parts the repair was concluded successfully.

busaman
Posts: 143
Joined: Wed Dec 31, 2014 11:00 am

Re: Help: supplier for electrical machine electronics in i3

Wed Apr 12, 2017 10:39 pm

im looking at the 2 large processors on the boad (infienon) but cant make them out what are the part numbers they look like tricore but i cant save and open to zoom in....
7.31s@203.3mph on one wheel

alohart
Posts: 2121
Joined: Sat Nov 01, 2014 7:36 pm
Location: Honolulu, HI

Re: Help: supplier for electrical machine electronics in i3

Thu Apr 13, 2017 2:09 am

busaman wrote:im looking at the 2 large processors on the boad (infienon) but can't make them out what are the part numbers they look like tricore but i cant save and open to zoom in....
I was able to download the photo to my Mac and zoom it in until pixelation made further zooming pointless. Unfortunately, I was unable to read the part numbers regardless of the magnification level.
Aloha,
Art

2014 BMW i3 Arravani Grey, Giga World, Tech + Driving Assist, Parking Assist, DC Fast Charging, JuiceBox EVSE

Bawareca
Posts: 48
Joined: Wed Apr 12, 2017 6:40 pm

Re: Help: supplier for electrical machine electronics in i3

Thu Apr 13, 2017 4:03 am

The part numbers are irrelevant. They are password locked Tricore TC1797, most common processor used in automobile electronics nowadays.

busaman
Posts: 143
Joined: Wed Dec 31, 2014 11:00 am

Re: Help: supplier for electrical machine electronics in i3

Thu Apr 13, 2017 12:23 pm

i can patch and read 1797 ..
7.31s@203.3mph on one wheel

Bawareca
Posts: 48
Joined: Wed Apr 12, 2017 6:40 pm

Re: Help: supplier for electrical machine electronics in i3

Thu Apr 13, 2017 2:32 pm

busaman wrote:i can patch and read 1797 ..
I have the tools to read/write most of them. If you dont know the boot pin, I dont see a way to read it. And more important, if you dont know the source code (Fuktionsrahmen) I dont see what can you do with the dump. But the idea is tempting nevertheless.

ELPROP
Posts: 1
Joined: Sat Nov 11, 2017 6:33 pm

Re: Help: supplier for electrical machine electronics in i3

Sat Nov 11, 2017 6:46 pm

Can you provide some details on how to open the EME module without removing it.
My car has problem with the AC charger inside EME module and I would like to try to open it from the top for diagnostics.
Thank you!

Bawareca
Posts: 48
Joined: Wed Apr 12, 2017 6:40 pm

Re: Help: supplier for electrical machine electronics in i3

Sun Nov 12, 2017 12:47 pm

I dropped the left side of the motor/eme assembly by removing the bolt of the motor mount. Then disconnect the HV battery from the front service disconnector and carefully remove the HV connector(s) on the top of the EME. The rest is T20 botls to remove the cover.

i3ACHeating
Posts: 1
Joined: Tue Apr 23, 2019 2:24 pm

Re: Help: supplier for electrical machine electronics in i3

Tue Apr 23, 2019 2:36 pm

Hello fellas,

In my BMW i3 rex A/C and heater don't work, that is what fault codes show, i tried to replace both A/C and heater, but no luck same problem. When i lift the car, i saw that HV cable that is connected to electric heater was damaged. When i observed the damaged part, it had black smoked color, what i assume is that there was a short circuit which damaged the EME. The thing is charging is connected to the module as well which works perfectly. I hope EME is fine, otherwise i'm screwed.

I tried to find similar problem in internet, unfortunately couldnt.

Any suggestions or fixes?

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