<![CDATA[aem ems]]>"bad ecu definition file" when trying to connect

tried two different laptops, three different installs of pro, serial and usb ports...

it will cycle through coms and recognize the ecu and version but fails to establish a connection

someone make this go away

]]>https://fargostreet.com/topic/17346/aem-emsRSS for NodeThu, 28 May 2026 06:05:37 GMTSun, 14 Jun 2009 12:08:57 GMT60<![CDATA[Reply to aem ems on Thu, 18 Jun 2009 04:29:01 GMT]]>

24valvenotak;279653 wrote:
yea i was swearing up and down i had to use an older version, turned out the latest one works.. but now im hearing that switching to the newer version screws with a few things...

That's only happening when they update the firmware from 1.11 to 1.19. It's something in the cal conversion I think. Just don't update the firmware until you're on the dyno ready to tune?

]]>https://fargostreet.com/post/268075https://fargostreet.com/post/268075Thu, 18 Jun 2009 04:29:01 GMT<![CDATA[Reply to aem ems on Thu, 18 Jun 2009 03:57:21 GMT]]>

91nbtsi;279232 wrote:
Ha. Mitch, I thought you tried 3 different installs of AEMPro? Glad you got it working!

yea i was swearing up and down i had to use an older version, turned out the latest one works.. but now im hearing that switching to the newer version screws with a few things...

]]>https://fargostreet.com/post/268065https://fargostreet.com/post/268065Thu, 18 Jun 2009 03:57:21 GMT<![CDATA[Reply to aem ems on Tue, 16 Jun 2009 01:16:10 GMT]]>

PSiedTSi;279229 wrote:
Problem solved. Upgraded AEMPro and it worked on the first try.

Ha. Mitch, I thought you tried 3 different installs of AEMPro? Glad you got it working!

]]>https://fargostreet.com/post/267644https://fargostreet.com/post/267644Tue, 16 Jun 2009 01:16:10 GMT<![CDATA[Reply to aem ems on Tue, 16 Jun 2009 00:32:47 GMT]]>Problem solved. Upgraded AEMPro and it worked on the first try.

]]>https://fargostreet.com/post/267641https://fargostreet.com/post/267641Tue, 16 Jun 2009 00:32:47 GMT<![CDATA[Reply to aem ems on Mon, 15 Jun 2009 03:52:03 GMT]]>i would bet the last time i had it connected was two years minimum. if that counts as out of the blue then yup ha.

not only am i worried about having to buy another one but i dont have a backup cal. yea. weak. means i cant even start it with a new one.

edit/ you asshats wrote all that before i finished two sentences?

]]>https://fargostreet.com/post/267534https://fargostreet.com/post/267534Mon, 15 Jun 2009 03:52:03 GMT<![CDATA[Reply to aem ems on Mon, 15 Jun 2009 03:43:41 GMT]]>

91nbtsi;279118 wrote:
I am pretty sure if it is running at all, there is still a cal on it. Not sure on the connectivity issue. Good luck, Mitch.

Right, but if we have to hardflash the chip without being able to connect, won't that delete the cal on the PROM?

]]>https://fargostreet.com/post/267533https://fargostreet.com/post/267533Mon, 15 Jun 2009 03:43:41 GMT<![CDATA[Reply to aem ems on Mon, 15 Jun 2009 03:39:14 GMT]]>I am pretty sure if it is running at all, there is still a cal on it. Not sure on the connectivity issue. Good luck, Mitch.

]]>https://fargostreet.com/post/267530https://fargostreet.com/post/267530Mon, 15 Jun 2009 03:39:14 GMT<![CDATA[Reply to aem ems on Mon, 15 Jun 2009 02:48:21 GMT]]>Sucks, what happened that started this? You just connected and got the error out of the blue? I was upgrading the firmware a few years ago with a USB adapter that went fubar and wasted the chip. AEM is good about sending out replacement chips quickly.

]]>https://fargostreet.com/post/267514https://fargostreet.com/post/267514Mon, 15 Jun 2009 02:48:21 GMT<![CDATA[Reply to aem ems on Sun, 14 Jun 2009 23:34:18 GMT]]>

integra_gsr98;279085 wrote:
How are you going to downgrade the firmware if you can't connect via serial? 🙂

EPROM burner. Obviously thats last resort, after speaking with AEM. I don't think he even has a map saved anymore.

]]>https://fargostreet.com/post/267498https://fargostreet.com/post/267498Sun, 14 Jun 2009 23:34:18 GMT<![CDATA[Reply to aem ems on Sun, 14 Jun 2009 23:26:48 GMT]]>How are you going to downgrade the firmware if you can't connect via serial? 🙂

]]>https://fargostreet.com/post/267497https://fargostreet.com/post/267497Sun, 14 Jun 2009 23:26:48 GMT<![CDATA[Reply to aem ems on Sun, 14 Jun 2009 21:05:39 GMT]]>

91nbtsi;279075 wrote:
Just call AEM and see what they have to say. I have never had that error. Sounds like it might be a hardware issue.

I found a bunch of instances of not being able to connect on the forums and most of them were solved with the EPROM chip not being seated well enough.

Mitch said something about you having to downgrade the firmware to get it to work before? It is on old firmware v1.11, but came with v1.03. I downloaded the newest version of AEMPro, and will try to give that a shot today. Then see what AEM has to say.

]]>https://fargostreet.com/post/267488https://fargostreet.com/post/267488Sun, 14 Jun 2009 21:05:39 GMT<![CDATA[Reply to aem ems on Sun, 14 Jun 2009 20:28:04 GMT]]>Just call AEM and see what they have to say. I have never had that error. Sounds like it might be a hardware issue.

]]>https://fargostreet.com/post/267487https://fargostreet.com/post/267487Sun, 14 Jun 2009 20:28:04 GMT<![CDATA[Reply to aem ems on Sun, 14 Jun 2009 18:10:25 GMT]]>

funky_monkey58;279070 wrote:
What are you using to connect? I have had good luck so far with my radioshack usb to serial adapter. But you have to make sure that you have serial selected as a connection port.

Other wise make sure you have power and ground at the correct pins.

Should clarify too that the car has had the AEM for 2-3 years, so he has connected to it before.

As for what he's using to connect, look at the first post. "tried two different laptops, three different installs of pro, serial and usb ports..." aka he has a laptop with a serial port, as well as a usb to serial adaptor that has worked before.

We checked the PROM chip as well, but it seemed snug still. If all else fails, I do have a burner to reburn the firmware, but then we are SOL with ZERO maps for the car.

]]>https://fargostreet.com/post/267484https://fargostreet.com/post/267484Sun, 14 Jun 2009 18:10:25 GMT<![CDATA[Reply to aem ems on Sun, 14 Jun 2009 17:41:38 GMT]]>What are you using to connect? I have had good luck so far with my radioshack usb to serial adapter. But you have to make sure that you have serial selected as a connection port.

Other wise make sure you have power and ground at the correct pins.

]]>https://fargostreet.com/post/267482https://fargostreet.com/post/267482Sun, 14 Jun 2009 17:41:38 GMT<![CDATA[Reply to aem ems on Sun, 14 Jun 2009 14:30:04 GMT]]>

weshole;279063 wrote:
What's Nate have to say? Give him a holla.

already been down that road

]]>https://fargostreet.com/post/267477https://fargostreet.com/post/267477Sun, 14 Jun 2009 14:30:04 GMT<![CDATA[Reply to aem ems on Sun, 14 Jun 2009 14:24:18 GMT]]>What's Nate have to say? Give him a holla.

]]>https://fargostreet.com/post/267475https://fargostreet.com/post/267475Sun, 14 Jun 2009 14:24:18 GMT<![CDATA[Reply to aem ems on Sun, 14 Jun 2009 13:00:10 GMT]]>

integra_gsr98;279057 wrote:
Call AEM on Monday Mitch.

booo

]]>https://fargostreet.com/post/267471https://fargostreet.com/post/267471Sun, 14 Jun 2009 13:00:10 GMT<![CDATA[Reply to aem ems on Sun, 14 Jun 2009 12:55:52 GMT]]>Call AEM on Monday Mitch.

]]>https://fargostreet.com/post/267469https://fargostreet.com/post/267469Sun, 14 Jun 2009 12:55:52 GMT