Hi i am in a pickle i went to flash a file onto a 2021 ram 3500 it went throught the flash said write completed but now it wont start and no ecm communicaition. anything that i can do or have someone do for me ? or is ecm bricked?
Hi i am in a pickle i went to flash a file onto a 2021 ram 3500 it went throught the flash said write completed but now it wont start and no ecm communicaition. anything that i can do or have someone do for me ? or is ecm bricked?
Likely locked in rom boot, will need to send the ecm to a shop to reflash it on a bench flash kit to get it out of rom boot and ensure a good standing calibration is written to the ecm.
Bench flashing is the safest way to use HP Tuners on the 2010+ Ram Cummins. On vehicle flashing many issues, especially if trying to read an ecm that has been tuned by something else like EFILive SOTF tuning or trashy H&S or something. I know it’s not liked by HP Tuners but it’s just an unfortunate reality when it comes to their stuff and the 2010+ Cummins, I see it happen far far far too often.
Your ECM is bricked and will need to be replaced. It cannot be recovered even with dealer software.
Not accurate at all unless you physically handled the ecm on an attempted bench flash recovery and know for a fact that the ecm is corrupted beyond recovery.Originally Posted by slimmons2009
im gonna send ecm off to get a bench flash
I am not a gambling person but would take a bet on this being bricked and not recoverable. I have seen this happen way too many times with the 2019-21 Dodge CM2450B ECM's with HPTuners. There was a time when HPTuners was telling dealers not to sell tuning for these until the issue was resolved.
Cool sounds like a gamble to me, might as well tell people to just light a couple thousand dollars on fire just on a gambling hunch.
99/100 times the ecm gets stuck in rom boot so of course obd2 flashing with dealer software, HP Tuners, EFILive won’t work to recover, leaving people thinking an ecm is completely and entirely bricked and unrecoverable. Never ever have I had a problem recovering through an ecm through J1939. That 1/100 times something with the HP Tuners process had corrupted the bootloader, then at that point the ecm was done for without a way to fix the bootloader. HP Tuners isn’t the only platform to have issues with writing to the 2019+ ECM’s. EFILive also had similar issues and it was caused by the CAN network not being completely shut down and prevented from starting up during the write procedure, the CAN network would wake up and disrupt the process and could still be recovered just fine. There is a procedure somewhere, can’t remember where I seen it, on fuses to pull to prevent it from happening. Ultimate reality with HP Tuners is their process just doesn’t mix well with some vehicles. It’s really bad with the 2010+ Cummins vehicles.
The thread is on EFILive. Try pulling fuse 49 and 51, then reflash.
https://forum.efilive.com/showthread...F)-controllers
2019 CCSB Bighorn - Excited HP Tuners finally supported Cummins CM2350&2450 platforms
Jim P I Need your help! i sent a PM. In the same predicament. No one will share which pin on the connector is the boot rom. i found info on 2350/2450 but not the B, its different.
If anyone is looking for bench flash harnesses to recover their ecm. mikes power wire has them for sale. they come with a ROM switch built into harness
Had this happen recently with a 2010 6.7L, which is now fixed.
Tried reading the truck and all of a sudden the truck started to freak out. No crank or start, couldn't shift out of park. Turns out customer had a tuner in it for egr deletes and I presume the truck didn't like being read with the hp tuner.
Ended up having the truck reprogramed with dealership tools and it started back up again. Gatta watch out for some guys at the dealers, gatta feel out who are the ones that can actually help...
Dealership tools don’t always work, just an FYI.
if the ecm isnt communicating there isnt anything oem software can do. if you can talk to ecm thats a whole diferent story and then you probably could just flash in a stock file to recover it . hence doing the same thing dealership would do
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