[germancarfan]

Hello,

Curious to know if anyone may have some advice here.
2014 BMW i3 EME offline and vehicle will not go into ready mode. Will not charge

• Vehicle had been in an accident to RF
  
• BST (battery safety terminal) was separated but air bags did not deploy
  
• All modules are online besides EME. 
  
• EME was sent for repair 
  
• EME still offline post repair
  
• EME powers and grounds are good
  
• Ptcan and Ptcan2 60.2 Ohms
  
• No faults in the ACSM
  
• SME state Release, switch contactors State: Control of the switch contactors active
  
• SME state switch contactor State: Open
  
• SME High-voltage interlock loop State: Open circuit
  
• SME State of charge lower limit State: 8%
  
• SME State of charge State: 7.7%
  

Original scan
https://docs.google.com/spreadsheets/d/1...sp=sharing

Post EME Repair Scan Via i5тд
https://drive.google.com/file/d/1r9gnLve...sp=sharing

Thank you!

[ymj19880806]

There is also a wake-up cable for 15wup

[germancarfan]

There is also a wake-up cable for 15wup

I do have battery voltage on that wire

[SweetBMW]

Did you check to see if the flexray ports to the EME is open?

Check status in tool32, zgw01.prg and find status_flexray_pfad


EDIT: My bad, no Flexray for i3 eme, only i8

[Node]

Are your CAN resi5тдnce/power measurements done on EME connectors or? Have you looked at CAN signals with the oscilloscope???

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Did you check to see if the flexray ports to the EME is open?

Check status in tool32, zgw01.prg and find status_flexray_pfad

You sure EME has flexray on i3?

[germancarfan]

Are your CAN resi5тдnce/power measurements done on EME connectors or? Have you looked at CAN signals with the oscilloscope???

---

Did you check to see if the flexray ports to the EME is open?

Check status in tool32, zgw01.prg and find status_flexray_pfad

You sure EME has flexray on i3?

Yes I back probed the connector directly to the EME and used a scope and found the wave forms to be typical of a high speed can network the only thing I found interesting was low side can would drop as low as .60V and high side would go as high as 4.2V which is out of specs as per BMW for PTcan and PTcan2 but found this to not be a definitive number. 

   

[Node]

Either your oscilloscope is extremely low bandwidth crap or that does not look correct AT ALL. Of course PTCAN is 500kbps, so 5ms per division is AGES (like 2500 bits, while it looks like there are like 50 pixels AT MOST per that division), so this view tells more or less nothing. To measure something meaningful you need like 50us per division...

[germancarfan]

Either your oscilloscope is extremely low bandwidth crap or that does not look correct AT ALL. Of course PTCAN is 500kbps, so 5ms per division is AGES, so this view tells more or less nothing.

I appreciate your honesty here lol. Let me get a different scope on it and report back

[germancarfan]

Either your oscilloscope is extremely low bandwidth crap or that does not look correct AT ALL. Of course PTCAN is 500kbps, so 5ms per division is AGES (like 2500 bits, while it looks like there are like 50 pixels AT MOST per that division), so this view tells more or less nothing. To measure something meaningful you need like 50us per division...

Please take a look with another scope I have

https://share.icloud.com/photos/02dYM6sp...4YS1fH3_qA

https://share.icloud.com/photos/0cbqJL-i...qu_LPB2C8g

https://share.icloud.com/photos/0bbLn0WJ...AmRkwnsdbw

I appreciate your input

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[attachment=186011]

Either your oscilloscope is extremely low bandwidth crap or that does not look correct AT ALL. Of course PTCAN is 500kbps, so 5ms per division is AGES (like 2500 bits, while it looks like there are like 50 pixels AT MOST per that division), so this view tells more or less nothing. To measure something meaningful you need like 50us per division...

Update:

   

[Node]

This looks much better and is OK...ish. There are these abnormal jumps in stop bit, but that may or may not be a problem.

Are these from PT-CAN or PT-CAN2? Or both?

Now I vaguely remember reading/hearing somewhere about similar issue. I don't remember whether EME was completely silent in that case, but AFAIR the problem was ACSM sending active crash signals to EME preventing it from operating. And I think there were no faults in ACSM either. So maybe you can try disconnecting ACSM and see what happens?

If nothing changes can you look into 15WUP with oscilloscope? Maybe it has short dropouts. Also look into ACSM signals.

P.S. I assume all issues with front lights/fan/etc are because they are not there at all?