Manual Working Hours Reset Guide & Tool for MEVD/EDC17
This resource provides a free software utility and a detailed step-by-step guide for manually resetting the working hours (motohours) in modern BMW engine control units. This process is essential when adapting a used DME/DDE to a new vehicle but is complex due to internal checksums that protect the data.
This is an advanced procedure that requires experience with hex editors.
Supported ECUs
This guide and tool are designed for, but not limited to, the following ECU families:
How It Works: A High-Level Overview
The included PDF guide explains the entire process in detail. The basic workflow is:
Tool Features
Prerequisites & System Information
Required Tools:
To follow this guide, you will need:
System Requirements:
Disclaimer
This is a complex, manual process for advanced users only. Incorrectly editing your EEPROM file will render your ECU unusable ("bricked"). You must understand the risks and follow the guide carefully. The user is fully responsible for all actions.
VirusTotal Check: https://www.virustotal.com/gui/file/882cc58b9405ab1e86fab3329614ea71723832146b99f3b13161bcbff394ef45
This resource provides a free software utility and a detailed step-by-step guide for manually resetting the working hours (motohours) in modern BMW engine control units. This process is essential when adapting a used DME/DDE to a new vehicle but is complex due to internal checksums that protect the data.
This is an advanced procedure that requires experience with hex editors.
Supported ECUs
This guide and tool are designed for, but not limited to, the following ECU families:
- MEVD (Gasoline) e.g., MEVD1724, MEVD1729, etc.
- EDC17 (Diesel) F-Series models.
How It Works: A High-Level Overview
The included PDF guide explains the entire process in detail. The basic workflow is:
- Get Current Hours: Use diagnostic software (like ISTA) to read the current "Operating hour counter" in minutes.
- Find Data Block: Use the provided software tool to convert the minutes into a searchable hex value. You then find this value in your EEPROM dump using a hex editor.
- Calculate New Checksums: Copy the entire data block from your hex editor into the tool.
- Generate Reset Data: The tool provides a "Reseted block" with the working hours set to zero and, crucially, the new, corrected CS1 and CS2 checksums.
- Edit EEPROM: Manually replace the old data block in your hex editor with the new one.
- Repeat: The working hours data can be stored in 1 to 4 different locations in the EEPROM. You must find and reset all of them.
Tool Features
- Minutes-to-Hex Converter: Helps you find the location of the working hours data block.
- Engine-Specific Algorithms: Provides separate calculation variants for Gasoline (MEVD) and Diesel (EDC17) engines.
- Universal Checksum Calculator: "Variant 3" allows advanced users to calculate CS1/CS2 for any data block.
- Automatic Block Reset: Generates a fully prepared data block with working hours zeroed out and checksums corrected.
Prerequisites & System Information
Required Tools:
To follow this guide, you will need:
- A hex editor (like HxD).
- A hardware programmer (like K-TAG, Autotuner, etc.) to read the full EEPROM/flash from your ECU.
- Diagnostic software (like ISTA) to read the original working hours.
System Requirements:
- Operating System: The helper tool was tested on Windows 10 Enterprise LTSC (2019) and should be compatible with other recent Windows versions.
Disclaimer
This is a complex, manual process for advanced users only. Incorrectly editing your EEPROM file will render your ECU unusable ("bricked"). You must understand the risks and follow the guide carefully. The user is fully responsible for all actions.
VirusTotal Check: https://www.virustotal.com/gui/file/882cc58b9405ab1e86fab3329614ea71723832146b99f3b13161bcbff394ef45
