PLEASE HELP car wont start after MHD

cozmicf · 01-10-2017, 03:17 AM

I just tried to d the MHD flash and my car won't start. It is throwing lots of errors. I didn't get past the 'Connecting to ECU' stage so I exited the app, tried again. Car tries to crank when starting but won't start. All manner of errors on the iDrive. PLEASE HELP!

Here is a link to the MHD debug logs I was able to pull off my android device: http://www.filedropper.com/mhdlogs

dsocold · 01-10-2017, 05:22 AM

try reconnecting the mhd and flash it back to stock map keep trying. if you started the flash even the very begining of it and it disrupts it can cause issues and go all crazy. This is why you must try to revert back to stockand if that doesnt work try reinstalling the same map. what happend did u interrupt it ?

cozmicf · 01-10-2017, 05:56 AM

Quote:

Originally Posted by dsocold

try reconnecting the mhd and flash it back to stock map keep trying. if you started the flash even the very begining of it and it disrupts it can cause issues and go all crazy. This is why you must try to revert back to stockand if that doesnt work try reinstalling the same map. what happend did u interrupt it ?

I must've tried to flash it with only one press of the ignition. It did not get past the 'connecting to ecu...connected' part for 10 minutes so I closed the app and tried again but this is when all the problems started (not being able to start, lots of errors codes, not being able to connect to the ECU)

I've been talking to someone at MHD about this problem, they had a look at my debug logs and they reckon the device is losing connection so they think it is probably the cable that is the problem. I bought the recommended DCAN cable from cable-shack so it's probably not that, but it may be the OTG cable, will try another cable tomorrow.

dbx73 · 01-10-2017, 07:44 AM

Did you make sure not to open or close any doors, windows, the hood, trunk, etc. while attempting the flash? Did you have it on a battery charger while you attempted the flash?

Any of those things will mess up the flash.

Did you backup your stock files through MHD? My first move would probably be to try and flash back to that through MHD.

cozmicf · 01-10-2017, 08:27 AM

I opened a door, but this was still at the 'connecting to ECU.. connected stage. Yes, I had a battery charger.

Once I can connect to the ECU again I can try a restore.

dbx73 · 01-10-2017, 10:05 AM

Best of luck once you get the new OTG cable! I doubt you bricked anything, I'm sure it's recoverable!

fjgregor · 01-10-2017, 10:24 AM

Disconnect the green ecu cable and flash again, its happened to me before quite a few times

cozmicf · 01-10-2017, 02:15 PM

Quote:

Originally Posted by fjgregor

Disconnect the green ecu cable and flash again, its happened to me before quite a few times

Which green ECU cable?

dsocold · 01-10-2017, 03:29 PM

you definetly interrupted the flash right at the begining, ive done this with cobb before but cobb went into safe mode and it fixed it. im new to mhd ( i literally installed it myself 2 nights ago) but by opening the drivers door the igntion gets turned off which means it was interrupted, even more obvious now that you are getting these issues. when it happend to me the priming sound of the pump was going off everytime i put the ignition on as if it was in the middle of a flash, scary. If i were you id be pluggin in the otg and obd cable in different sequences in an attemt to try and get it to read it on your andriod and flash to stock

cozmicf · 01-10-2017, 03:47 PM

Quote:

Originally Posted by dsocold

you definetly interrupted the flash right at the begining, ive done this with cobb before but cobb went into safe mode and it fixed it. im new to mhd ( i literally installed it myself 2 nights ago) but by opening the drivers door the igntion gets turned off which means it was interrupted, even more obvious now that you are getting these issues. when it happend to me the priming sound of the pump was going off everytime i put the ignition on as if it was in the middle of a flash, scary. If i were you id be pluggin in the otg and obd cable in different sequences in an attemt to try and get it to read it on your andriod and flash to stock

Yeah I think that's probably what happened. I do hear what sounds like the fuel pump coming on with the ignition now.

cozmicf · 01-11-2017, 03:51 AM

So I asked Vincent (vtl) from these forums to come and try to flash my ECU back to stock with all the BMW tools he had (ICOM cable, WinKFP, etc). He reckons the ECU is actually bricked as he could connect to the OBD port and communicate with all the other modules except for the ECU, even after trying all the low level tools he had.

I've been in contact with MHD on Facebook and they assure me that the ECU can't be bricked. Waiting on some more information from them.

Assuming it is bricked, Vincent told me I have three options:
1. Remove the DME myself and get it bench flashed by a workshop in Melbourne
2. Get a BMW dealership to order in a new DME and fix it
3. Order all the parts - DME/CAS/etc and do it myself

Option 3 is probably off the table.

Option 2 will probably be pretty expensive - does anyone know how much this would be?

As for option 1, I'm not too confident in myself to start pulling things out from under the hood and get under the intake manifold to get the DME out. Does anyone know how to do this with the N55 135i and would be willing to lend a couple of hours to help me do it if I do decide to try this? Is this option likely to work?

Anyone know which shops around Melbourne have experience with this kind of stuff?

Any advice is much appreciated.

cozmicf · 02-23-2017, 03:33 AM

An update to this situation. The DME arrived back in Melbourne this week after having been sent to Germany and being revived by MHD. The car is up and running at the moment with the stage 1 tune, but I will be monitoring it over the next few weeks to make sure it all works as it did before. The power delivery is now much smoother, and it definitely feels like it has more pull.

I have nothing but positives to say about how Martial from MHD helped me through this problem. He was always responsive and willing to help and I could not recommend his customer service more. Much appreciated Martial, thank you.

Also, the app has been updated to prevent this problem for occurring again.

zx10guy · 02-23-2017, 04:18 AM

What exactly happened? Was it a bug in the app version you were using?

cozmicf · 02-23-2017, 05:59 AM

Quote:

Originally Posted by zx10guy

What exactly happened? Was it a bug in the app version you were using?

I am unsure of the exact details, but the app and car it seems got into a corner case state where multiple flashing threads were started in parallel. In any case, this has been patched up in the new version of the app.

project jayden · 02-23-2017, 07:18 AM

Quote:

Originally Posted by zx10guy

What exactly happened? Was it a bug in the app version you were using?

he mentioned that he opened the door during the connecting phase which you aren't supposed to do. I made the mistake as well. should have been able to reflash it though.

Sam_M · 02-23-2017, 09:17 AM

So it's all good now?

cozmicf · 02-23-2017, 05:13 PM

Quote:

Originally Posted by SamM_UK

So it's all good now?

Yes as far as I can tell the car has been running fine for the last few days. Will continue to monitor it for the next few weeks.

01-10-2017, 03:17 AM	#1
cozmicf Rik 24 Rep 108 Posts Drives: DSB 135i 2011 DCT N55 Join Date: Sep 2016 Location: Melbourne iTrader: (0)	PLEASE HELP car wont start after MHD I just tried to d the MHD flash and my car won't start. It is throwing lots of errors. I didn't get past the 'Connecting to ECU' stage so I exited the app, tried again. Car tries to crank when starting but won't start. All manner of errors on the iDrive. PLEASE HELP! Here is a link to the MHD debug logs I was able to pull off my android device: http://www.filedropper.com/mhdlogs Last edited by cozmicf; 01-10-2017 at 04:05 AM..
	Appreciate 0 Tweet Quote

01-10-2017, 05:22 AM	#2
dsocold Captain 198 Rep 684 Posts Drives: f06 640i GC. E82 N54 135i Join Date: Apr 2015 Location: new york iTrader: (0)	try reconnecting the mhd and flash it back to stock map keep trying. if you started the flash even the very begining of it and it disrupts it can cause issues and go all crazy. This is why you must try to revert back to stockand if that doesnt work try reinstalling the same map. what happend did u interrupt it ?
	Appreciate 0 Quote

01-10-2017, 07:44 AM	#4
dbx73 New Member 6 Rep 11 Posts Drives: 2008 135i Join Date: Oct 2016 Location: CT iTrader: (0)	Did you make sure not to open or close any doors, windows, the hood, trunk, etc. while attempting the flash? Did you have it on a battery charger while you attempted the flash? Any of those things will mess up the flash. Did you backup your stock files through MHD? My first move would probably be to try and flash back to that through MHD. Last edited by dbx73; 01-10-2017 at 08:05 AM..
	Appreciate 0 Quote

01-10-2017, 08:27 AM	#5
cozmicf Rik 24 Rep 108 Posts Drives: DSB 135i 2011 DCT N55 Join Date: Sep 2016 Location: Melbourne iTrader: (0)	I opened a door, but this was still at the 'connecting to ECU.. connected stage. Yes, I had a battery charger. Once I can connect to the ECU again I can try a restore.
	Appreciate 0 Quote

01-10-2017, 10:05 AM	#6
dbx73 New Member 6 Rep 11 Posts Drives: 2008 135i Join Date: Oct 2016 Location: CT iTrader: (0)	Best of luck once you get the new OTG cable! I doubt you bricked anything, I'm sure it's recoverable!
	Appreciate 0 Quote

01-10-2017, 10:24 AM	#7
fjgregor Private First Class 42 Rep 105 Posts Drives: 2012 E92 M3 Laguna Seca Blue Join Date: Sep 2014 Location: Puerto Rico iTrader: (0)	Disconnect the green ecu cable and flash again, its happened to me before quite a few times __________________ 2009 135i e82 Alpine White N54 DNF 2012 M3 E92 Laguna Seca Blue S65 Toa Alta, Puerto Rico
	Appreciate 0 Quote

01-10-2017, 03:29 PM	#9
dsocold Captain 198 Rep 684 Posts Drives: f06 640i GC. E82 N54 135i Join Date: Apr 2015 Location: new york iTrader: (0)	you definetly interrupted the flash right at the begining, ive done this with cobb before but cobb went into safe mode and it fixed it. im new to mhd ( i literally installed it myself 2 nights ago) but by opening the drivers door the igntion gets turned off which means it was interrupted, even more obvious now that you are getting these issues. when it happend to me the priming sound of the pump was going off everytime i put the ignition on as if it was in the middle of a flash, scary. If i were you id be pluggin in the otg and obd cable in different sequences in an attemt to try and get it to read it on your andriod and flash to stock
	Appreciate 0 Quote

01-11-2017, 03:51 AM	#11
cozmicf Rik 24 Rep 108 Posts Drives: DSB 135i 2011 DCT N55 Join Date: Sep 2016 Location: Melbourne iTrader: (0)	So I asked Vincent (vtl) from these forums to come and try to flash my ECU back to stock with all the BMW tools he had (ICOM cable, WinKFP, etc). He reckons the ECU is actually bricked as he could connect to the OBD port and communicate with all the other modules except for the ECU, even after trying all the low level tools he had. I've been in contact with MHD on Facebook and they assure me that the ECU can't be bricked. Waiting on some more information from them. Assuming it is bricked, Vincent told me I have three options: 1. Remove the DME myself and get it bench flashed by a workshop in Melbourne 2. Get a BMW dealership to order in a new DME and fix it 3. Order all the parts - DME/CAS/etc and do it myself Option 3 is probably off the table. Option 2 will probably be pretty expensive - does anyone know how much this would be? As for option 1, I'm not too confident in myself to start pulling things out from under the hood and get under the intake manifold to get the DME out. Does anyone know how to do this with the N55 135i and would be willing to lend a couple of hours to help me do it if I do decide to try this? Is this option likely to work? Anyone know which shops around Melbourne have experience with this kind of stuff? Any advice is much appreciated. Last edited by cozmicf; 01-11-2017 at 03:58 AM..
	Appreciate 0 Quote

02-23-2017, 03:33 AM	#12
cozmicf Rik 24 Rep 108 Posts Drives: DSB 135i 2011 DCT N55 Join Date: Sep 2016 Location: Melbourne iTrader: (0)	An update to this situation. The DME arrived back in Melbourne this week after having been sent to Germany and being revived by MHD. The car is up and running at the moment with the stage 1 tune, but I will be monitoring it over the next few weeks to make sure it all works as it did before. The power delivery is now much smoother, and it definitely feels like it has more pull. I have nothing but positives to say about how Martial from MHD helped me through this problem. He was always responsive and willing to help and I could not recommend his customer service more. Much appreciated Martial, thank you. Also, the app has been updated to prevent this problem for occurring again. Last edited by cozmicf; 02-23-2017 at 04:04 AM..
	Appreciate 0 Quote

02-23-2017, 09:17 AM	#16
Sam_M Tea wot? 210 Rep 271 Posts Drives: 2011 N55 135i 6MT Join Date: Nov 2016 Location: UK iTrader: (0)	So it's all good now?
	Appreciate 0 Quote