MHD failing

N55life · 11-21-2021, 04:07 PM

This is my first post on the forums so I am sorry if it is not in the correct spot.

Im in serious need of help. I tried to tune my e90 with MHD and the programming failed. Currently the vehicle does not run because of the failed attempt. I have tried to tune with a BimmerGeeks cable as well as the MHD wifi adaptor. neither helped.

Currently

I am using the MHD adaptor
S21 ultra
25 amp charger
new battery
double click the start button without starting vehicle
phone in airplane mode

Situation

When ever I try and either flash back to stock or stage 2 I click long write and then MHD immediately displays unable to write ECU. This has been going on for 4 days so far. I have read through all the forums. I have watched every video. I am at a total loss as to what i should do. Did i destroy my ECU? what else can i do?

What am I doing wrong.

falconey · 11-21-2021, 04:49 PM

I'd advise you try another cable. If you just bought the bimmergeek cable have them exchange it.

N55life · 11-21-2021, 04:58 PM

Falconey,

Thank you for the response. I will be exchanging the cable. Since I did not know how long it would take to exchange I went ahead and purchased the MHD wifi adaptor. Is it possible that the WiFi adaptor is inoperative as well? I can connect with the adaptor.

falconey · 11-21-2021, 05:06 PM

I've had issues flashing full writes with my wifi adapter

BSM n54iS · 11-21-2021, 05:30 PM

For clarity, are you flashing back to stock (stage 0) with MHD still enabled, or back to original ECU bin?

N55life · 11-21-2021, 06:58 PM

BDSM n54is,

I am not sure what original ECU bin means but I have tried to flash to stage 0 as well as back to stock without MHD installed.

Edit,

I have tried to program MHD with a different device with the same results.

So far 2 phones have been used, MHD WiFi adaptor, k+DCAN cable, 2 otg adaptors, 2 different battery chargers. performed several battery disconnects.

matamua · 11-22-2021, 01:53 PM

Are you hooking the charger up at the battery or under the hood?

I had trouble under the hood that went away after hooking it up at the battery and letting it go to 100% before attempting another flash

N55life · 11-22-2021, 10:35 PM

Thank you onebad335 and matamua. I have another cable on the way as well as a tablet. Once they come in i will follow what you guys said and then update this form.

ky0u · 11-22-2021, 10:49 PM

Quote:

Originally Posted by N55life

Thank you onebad335 and matamua. I have another cable on the way as well as a tablet. Once they come in i will follow what you guys said and then update this form.

Alternative suggestion you can at least eliminate: double check the network on your phone. I had flashing issues on mine via wifi for a bit. Would either fail to connect entirely or fail flash after <10%. Then i noticed there was a thing on my phone regarding staying connected to a network depsite bad/no internet. After I confirmed, I was able to complete flash.

One other time I had failure during long write leaving my car unable to start like yours. I tried again and put my phone in the footwell next to the dongle and it worked. Might have been coincidence though

N55life · 11-22-2021, 11:49 PM

Ky0u,

When you had the failure on the long write did your dme stop communicating?

So the very first attempt mhd erased files for about 10 minutes then failed. Ever since then the dme immediately fails. No percent just an immediate fail to write ecu. When i connected my Matco scantool today to see if there was any communication it could not read anything from the dme. It could read from every other module. I proceeded to then remove the dme relay and jumper pin 3 and 5. Same result no dme communication with the scantool. So power and ground to the dme have been checked. I checked the obd2 port for any pinfit concerns. Everything tested good. My concern now is that i ruined the dme.

falconey · 11-24-2021, 12:11 PM

No promises, but I don't think your dme is toast. I think you just need a successful Stock Flash.

Sgop335 · 11-24-2021, 12:59 PM

Havent ppl disconnected the negative battery cable for 30mins or more, then reconnected and get the flash to work?

N55life · 11-24-2021, 01:44 PM

Thank you guys for the input. I just got a bimmergeeks expert cable in. Should I attempt a stock flash first? I disconnected the battery overnight so hopefully this works.

N55life · 11-24-2021, 01:50 PM

I just reattempted the flash back to stock with the expert cable. Same result no communication with the DME. At this point i see no other option besides a faulty dme.

Sgop335 · 11-24-2021, 03:50 PM

I put the key in slot and only single click the start button.. not double click...n54.

N55life · 11-24-2021, 05:43 PM

Yup ive tried that as well. How do you get an ecu out of recovery mode?

matamua · 11-26-2021, 11:50 PM

Quote:

Originally Posted by N55life

I just reattempted the flash back to stock with the expert cable. Same result no communication with the DME. At this point i see no other option besides a faulty dme.

And the charger is hooked up at the battery?

falconey · 11-27-2021, 07:20 PM

Is it possible there is another tune installed? With the jb4 you have to get to map 0 before flashing with mhd. I just can't imagine the failed flash killing your dme.

N55life · 12-01-2021, 04:10 PM

Matamua,

The battery charger is connected directly to the battery. Its not connected to the terminals in the front of the car.

Falconey,

There is no chance of there ever being a jb4 being installed. Is it only with a jb4 previously installed that i have to flash to 0 for the first flash?

I just got the dme back from precision ecu and everything operates correctly. Im going to give it about a week before i brick my dme again😅. What recommendations do you guys have for reattempting to flash mhd. Im not trying to go without a car again for 2 weeks.

Sgop335 · 12-01-2021, 08:29 PM

The owners manual says to charge the battery only from the terminals under the hood. That is the only place i charge while flashing.

SweetN54 · 12-01-2021, 09:49 PM

Try use the Wifi One, it works great!

matamua · 01-03-2022, 06:31 AM

What ended up happening here?

11-21-2021, 04:07 PM	#1
N55life New Member 0 Rep 9 Posts Drives: 2011 335i xdrive 6 speed Join Date: Apr 2021 Location: Illinois iTrader: (0)	MHD failing This is my first post on the forums so I am sorry if it is not in the correct spot. Im in serious need of help. I tried to tune my e90 with MHD and the programming failed. Currently the vehicle does not run because of the failed attempt. I have tried to tune with a BimmerGeeks cable as well as the MHD wifi adaptor. neither helped. Currently I am using the MHD adaptor S21 ultra 25 amp charger new battery double click the start button without starting vehicle phone in airplane mode Situation When ever I try and either flash back to stock or stage 2 I click long write and then MHD immediately displays unable to write ECU. This has been going on for 4 days so far. I have read through all the forums. I have watched every video. I am at a total loss as to what i should do. Did i destroy my ECU? what else can i do? What am I doing wrong.
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11-21-2021, 04:49 PM	#2
falconey Captain 483 Rep 681 Posts Drives: 18 f80cs, 21 f97 Join Date: Mar 2013 Location: atlanta iTrader: (0)	I'd advise you try another cable. If you just bought the bimmergeek cable have them exchange it.
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11-21-2021, 04:58 PM	#3
N55life New Member 0 Rep 9 Posts Drives: 2011 335i xdrive 6 speed Join Date: Apr 2021 Location: Illinois iTrader: (0)	Falconey, Thank you for the response. I will be exchanging the cable. Since I did not know how long it would take to exchange I went ahead and purchased the MHD wifi adaptor. Is it possible that the WiFi adaptor is inoperative as well? I can connect with the adaptor.
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11-21-2021, 05:06 PM	#4
falconey Captain 483 Rep 681 Posts Drives: 18 f80cs, 21 f97 Join Date: Mar 2013 Location: atlanta iTrader: (0)	I've had issues flashing full writes with my wifi adapter
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11-21-2021, 05:30 PM	#5
BSM n54iS Brigadier General 2685 Rep 4,202 Posts Drives: '11 335is \| '16 Macan Turbo Join Date: Aug 2015 Location: Everywhere and Nowhere iTrader: (7)	For clarity, are you flashing back to stock (stage 0) with MHD still enabled, or back to original ECU bin? __________________ '11 335is BSM MT "BMW Performance Editon" \| '16 Porsche Macan Turbo GruppeM CF Intake \| AR Resonated DP \| ER CP \| Turbosmart RacePort BOV \| Cobb FMIC \| RB Inlets \| RB External Mishi/Turner OCC \| Michelin PS4 \| BMW Performance Springs/Bilstein B8 + Dinan & M3 bits \| BMW Brembo BBK \| BMW Performance CF Spoiler \| BMW Performance CF Lip \| BMW Performance Alcantara \| PS Designs GTS Armrest \| AG H6-40 \| Rear Seat Delete
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11-21-2021, 06:58 PM	#6
N55life New Member 0 Rep 9 Posts Drives: 2011 335i xdrive 6 speed Join Date: Apr 2021 Location: Illinois iTrader: (0)	BDSM n54is, I am not sure what original ECU bin means but I have tried to flash to stage 0 as well as back to stock without MHD installed. Edit, I have tried to program MHD with a different device with the same results. So far 2 phones have been used, MHD WiFi adaptor, k+DCAN cable, 2 otg adaptors, 2 different battery chargers. performed several battery disconnects. Last edited by N55life; 11-21-2021 at 07:29 PM..
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11-22-2021, 01:53 PM	#7
matamua First Lieutenant 80 Rep 354 Posts Drives: 2007 e93 335i, FBO, m3 control Join Date: Jun 2019 Location: USA iTrader: (0)	Are you hooking the charger up at the battery or under the hood? I had trouble under the hood that went away after hooking it up at the battery and letting it go to 100% before attempting another flash
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11-22-2021, 10:35 PM	#8
N55life New Member 0 Rep 9 Posts Drives: 2011 335i xdrive 6 speed Join Date: Apr 2021 Location: Illinois iTrader: (0)	Thank you onebad335 and matamua. I have another cable on the way as well as a tablet. Once they come in i will follow what you guys said and then update this form.
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11-22-2021, 11:49 PM	#10
N55life New Member 0 Rep 9 Posts Drives: 2011 335i xdrive 6 speed Join Date: Apr 2021 Location: Illinois iTrader: (0)	Ky0u, When you had the failure on the long write did your dme stop communicating? So the very first attempt mhd erased files for about 10 minutes then failed. Ever since then the dme immediately fails. No percent just an immediate fail to write ecu. When i connected my Matco scantool today to see if there was any communication it could not read anything from the dme. It could read from every other module. I proceeded to then remove the dme relay and jumper pin 3 and 5. Same result no dme communication with the scantool. So power and ground to the dme have been checked. I checked the obd2 port for any pinfit concerns. Everything tested good. My concern now is that i ruined the dme.
	Appreciate 0 Quote

11-24-2021, 12:11 PM	#11
falconey Captain 483 Rep 681 Posts Drives: 18 f80cs, 21 f97 Join Date: Mar 2013 Location: atlanta iTrader: (0)	No promises, but I don't think your dme is toast. I think you just need a successful Stock Flash.
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11-24-2021, 12:59 PM	#12
Sgop335 Colonel 648 Rep 2,013 Posts Drives: 07 335i e92, 08 535i Join Date: Jun 2014 Location: MD iTrader: (1)	Havent ppl disconnected the negative battery cable for 30mins or more, then reconnected and get the flash to work? __________________ 335i e92 TPC 19Ts
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11-24-2021, 01:44 PM	#13
N55life New Member 0 Rep 9 Posts Drives: 2011 335i xdrive 6 speed Join Date: Apr 2021 Location: Illinois iTrader: (0)	Thank you guys for the input. I just got a bimmergeeks expert cable in. Should I attempt a stock flash first? I disconnected the battery overnight so hopefully this works.
	Appreciate 0 Quote

11-24-2021, 01:50 PM	#14
N55life New Member 0 Rep 9 Posts Drives: 2011 335i xdrive 6 speed Join Date: Apr 2021 Location: Illinois iTrader: (0)	I just reattempted the flash back to stock with the expert cable. Same result no communication with the DME. At this point i see no other option besides a faulty dme.
	Appreciate 0 Quote

11-24-2021, 03:50 PM	#15
Sgop335 Colonel 648 Rep 2,013 Posts Drives: 07 335i e92, 08 535i Join Date: Jun 2014 Location: MD iTrader: (1)	I put the key in slot and only single click the start button.. not double click...n54. __________________ 335i e92 TPC 19Ts
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11-24-2021, 05:43 PM	#16
N55life New Member 0 Rep 9 Posts Drives: 2011 335i xdrive 6 speed Join Date: Apr 2021 Location: Illinois iTrader: (0)	Yup ive tried that as well. How do you get an ecu out of recovery mode?
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11-27-2021, 07:20 PM	#18
falconey Captain 483 Rep 681 Posts Drives: 18 f80cs, 21 f97 Join Date: Mar 2013 Location: atlanta iTrader: (0)	Is it possible there is another tune installed? With the jb4 you have to get to map 0 before flashing with mhd. I just can't imagine the failed flash killing your dme.
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12-01-2021, 04:10 PM	#19
N55life New Member 0 Rep 9 Posts Drives: 2011 335i xdrive 6 speed Join Date: Apr 2021 Location: Illinois iTrader: (0)	Matamua, The battery charger is connected directly to the battery. Its not connected to the terminals in the front of the car. Falconey, There is no chance of there ever being a jb4 being installed. Is it only with a jb4 previously installed that i have to flash to 0 for the first flash? I just got the dme back from precision ecu and everything operates correctly. Im going to give it about a week before i brick my dme again😅. What recommendations do you guys have for reattempting to flash mhd. Im not trying to go without a car again for 2 weeks.
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12-01-2021, 08:29 PM	#20
Sgop335 Colonel 648 Rep 2,013 Posts Drives: 07 335i e92, 08 535i Join Date: Jun 2014 Location: MD iTrader: (1)	The owners manual says to charge the battery only from the terminals under the hood. That is the only place i charge while flashing. __________________ 335i e92 TPC 19Ts
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12-01-2021, 09:49 PM	#21
SweetN54 New Member 0 Rep 5 Posts Drives: E90 335i 2007, E46 323CI 2000 Join Date: Dec 2021 Location: Australia, Gold Coast iTrader: (0)	Try use the Wifi One, it works great!
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01-03-2022, 06:31 AM	#22
matamua First Lieutenant 80 Rep 354 Posts Drives: 2007 e93 335i, FBO, m3 control Join Date: Jun 2019 Location: USA iTrader: (0)	What ended up happening here?
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