LOOKING FOR SCHEMATICS OF BMW EV C-EVOLUTION - Page 1
Forum section: electronics / general

author: lordjohn
author_rank: Newbie
timestamp: May 02, 2025, 05:34:27 pm
content: Hi,Doing refurbuishing project on BMW C- Evolution C17 2013 model(EV). I need whole schematic diagram .or anyone help me with (how to CROSS CHECK the components).Problem: Bike doesnt ON. But the battery and motors are good.HOW TO DUBUG THE PROBLEM?HOW TO GET WHOLE SCHEMATIC DIAGRAM OF THIS EV?

author: thm_w
author_rank: Super Contributor
timestamp: May 02, 2025, 09:42:00 pm
content: Good luck, I doubt you can find schematics.Did you google search yet? How do you know the motor and battery are good if it doesn't turn on?https://www.electricmotorcycleforum.com/boards/index.php?topic=6875.0https://www.advrider.com/f/threads/bmw-c-evolution-electric-scooter.1276723/page-15

author: lordjohn
author_rank: Newbie
timestamp: May 03, 2025, 08:17:28 am
content: checked the voltage in battery, it showing 127v of 133v. 3 batteries connected in series.No idea about motor. spec says 3 phase synchoronous motor.actually this EV is imported model so less knowledge about it. also checking the sites you have sent.NEED SOME TECHNICAL ASSISTANCE TO FIND THE PROBLEM. CAN YOU HELP?

author: mtwieg
author_rank: Frequent Contributor
timestamp: May 03, 2025, 01:27:53 pm
content: Finding a schematic is likely impossible. I doubt BMW even have it (they probably did not design it).Even if you had the schematic, you would need to do some testing and measurements of the electronics to find the problem. Have you done any testing yet? Might be as simple as a blown fuse or bad connector/cable.

author: lordjohn
author_rank: Newbie
timestamp: May 03, 2025, 01:43:19 pm
content: YES, Just checked all fuses,relays,main battery,12v battery.but there are many cotroller like boxes,just dont have any idea what it is and dont know what to do next?How to check those controller boxes(PCBs ) inside?

author: nctnico
author_rank: Super Contributor
timestamp: May 03, 2025, 02:15:50 pm
content: Is there no ODB connector to read the status? And how about finding user forums? For many vehicles you can find cheap diagnostic tools.These are two random Google finds that have some decent pointers as where to start and which tools to use:https://www.electricmotorcycleforum.com/boards/index.php?topic=6875.0

author: ptluis
author_rank: Frequent Contributor
timestamp: May 03, 2025, 06:03:55 pm
content: Quote from: nctnico on May 03, 2025, 02:15:50 pmIf my memory is not failing me, BMW uses 10 pin ICOM D port. What you could try is buying a 10 pin ICOM D to 15 pin OBD cable and try a general OBD scanner, because you won't find BMW diagnostic software. it's only supplied to certified and licenced professionals.With general OBD you might gain access to basic information specially error codes.

author: nctnico
author_rank: Super Contributor
timestamp: May 03, 2025, 06:52:22 pm
content: You may think that but there are tons of hackers out there who sell software for diagnostic purposes. Some even with more features than what is available to a generic dealer. BMW is no exception. Just search on internet. Bimmergeeks is what turned up with a quick random google search from a forum.

author: ptluis
author_rank: Frequent Contributor
timestamp: May 03, 2025, 11:52:12 pm
content: Quote from: nctnico on May 03, 2025, 06:52:22 pmGood luck with that

author: ptluis
author_rank: Frequent Contributor
timestamp: May 04, 2025, 12:05:51 am
content: Quote from: lordjohn on May 03, 2025, 01:43:19 pmAre you sure power reach the bmw control unit? All connectors seated properly?Here is the part number for your bike:Control unit 12388388589Concerning the battery it could show voltage but not communicate with the control unit, and if that's the case the bike won't turn on