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Written By
Andrew Jensen
Date Created
Thu, 24th Jun 2010
Updated By
Cindy Myers
Date Modified
Fri, 23rd Mar 2018

   Problem Flashing a Controller


I am having a problem flashing an ECM or TCM controller in a supported vehicle, what can I do?


Check Software and Firmware Updates

The first thing to ensure is that you have the latest EFILive software and device firmware (if applicable) installed.  Ensuring you have the latest product versions will assist EFILive support and development should the fault need to be investigated further.

Please see the Getting the Latest Software knowledgebase article for further guidance.

Check Aftermarket Devices

The read and flash operations command other modules on the vehicle communications bus to be silent.  Unfortunately some devices are not compliant with the communications specification and interrupt the read/flash which cannot be resolved by EFILive.  In these situations it may be necessary to disconnect the problem devices or pull specific vehicle fuses, or in extreme cases use an offboard programming harness to read or flash the controller.

EFILive is aware that it is sometimes necessary to pull the Info and Radio fuses on some vehicles.  Other problem devices can include Mobile Phone adapters and other Communications Equipment.

Do Not Operate Vehicle

DO NOT operate any vehicle feature that may communicate on the data bus. This includes opening or closing of hood, doors, windows, as well as changing settings on radio, HVAC, connecting/removing charging devices etc.

Check Error Code List

The EFILive V8 Scan and Tune software contains a listing of the EFILive Error Codes.  The list includes a the error code, a description of the cause and suggested solutions.  Click on this link, or follow these instructions to access the EFILive Error Codes:

  1. Open the EFILive Scan and Tune application.
  2. Navigate to [F8: Tools] -> [F8: Error Codes].
  3. Search on the error code generated by the EFILive software, FlashScan V2 or AutoCal device

The EFILive Error Codes listing is also available in pdf form.  To access the EFILive Error Codes.pdf

  1. Open the EFILive Scan and Tune application.
  2. Navigate to the Help -> Documents menu selection.
  3. Select EFILive Error Codes.pdf.
  4. Search on the error code generated by the EFILive software, FlashScan V2 or AutoCal device.

Check Available Licenses

The first time a user flashes a controller using EFILive, licensing requirements are validated and must be met to facilitate a successful flash.  The following licensing requirements must be met:

FlashScan V2 - The Tuning License option must be valid, and there must be an available VIN License or active Stream License.

AutoCal - There must be an available VIN License.

Refer to the License Status knowledgebase article for further information.

Cummins Anti Tuning Bootloader

In early 2009 Cummins ECM's were manufactured with higher levels of security consisting of an RSA Digital Signature on the calibrations.  All vehicles with a 2010 or later model year contain ECM’s that have been updated with this additional security and all service replacement ECM's are manufactured this way.

The RSA Digital Signature does not prevent reading the tune from the ECM or the flashing of stock tunes, it ONLY prevents the flashing of modified tunes, so to flash a modified tune, the Digital Signature must first be switched off.

EFILive has developed a method to turn off the OBD-II Digital Signature validation for the following ECM's:

  1. Cummins 2007-09 CM2100A (CMC)
  2. Cummins 2010-12 CM2200A (CMD)

Please refer to the Cummins BootRSA Patch User Guide.

The 2013+ CM2350B ECM Digital Signature cannot be bypassed by OBD-II flashing, and requires secondary processes and equipment to remove the Digital Signature.  The easiest method to remove the Digital Signature so you can flash modified tunes is to install a BullyDog GT tuner with a 2013+ unlock cable.  This equipment connects to the OEM 3 Plug Connector under the hood of the vehicle.

LB7 and LLY Controllers

Refer to the LB7 & LLY Tips and Tricks help file for more information

Further Support

The Controller Recovery help file provides further assistance.

If all of the above have been attempted and issues still persist; it will be necessary to provide EFILive support with Diagnostic Trace Files to assist in identifying and resolving your issue.

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