ECU checksum correction is an optional add-on service that recalculates and updates the integrity values inside the ECU file after tuning. It ensures the modified file is accepted by the ECU without errors or unexpected limp-mode.
ECU Checksum Correction Service
A checksum is a mathematical integrity value stored inside the ECU firmware. Whenever you modify maps (fuel, torque, boost, DTC, DPF/EGR/AdBlue off, etc.), the checksum must be recalculated and updated. If not, the ECU may reject the write, enter limp mode or simply not start after flashing.
Important: checksum correction is a separate, optional service. If your flasher does not reliably fix checksums, or you prefer a pre-verified file, add the
Checksum Correction add-on at checkout and receive a validated file ready to flash.
Low-quality clone devices often apply incomplete or wrong checksum logic (wrong regions, polynomial/endianness, or missing EEPROM), which can cause failed writes or even a bricked ECU.
Supported ECU Families – Complete Technical Coverage
| Manufacturer / Family | Supported ECU Variants | Architecture / MCU | File Formats | Special Features | Applications |
|---|---|---|---|---|---|
| Bosch MDG1 / MG1 / MD1 |
MD1 Series (Diesel): MD1CS001, MD1CS002, MD1CS003, MD1CS069, MD1CP002, MD1CP004, MD1CP006, MD1CP007, MD1CP062, MD1CE100, MD1CE101 MG1 Series (Gasoline): MG1CS001, MG1CS002, MG1CS011, MG1CS016, MG1CS111, MG1CS261, MG1CSxxx (Ford variants) | Infineon Tricore TC298 / TC299 / TC275 / TC277 | VBF, Hex, Binary (max 16MB) |
• EEPROM checksum correction • CVN (Calibration Verification Number) fix • Hash patch support Note: May contain RSA checksum that cannot be calculated. EEPROM works only with unmodified original as basis. | VW, Audi, BMW, Mercedes, Porsche, Ford, PSA, Volvo, Opel, Fiat |
| Bosch EDC17 / MED17 / ME17 |
EDC17 Diesel: EDC17CP04, CP14, CP20, CP22, CP44, CP48, EDC17C46, C49, C64, EDC17CV41, CV42, CV54, CV82 MED17 Gasoline: MED17.1, 17.1.1, 17.3, 17.5, 17.5.21, 17.7 ME17: ME17.5, ME17.9.8 (42+ variants supported) | Infineon Tricore TC1766 / TC1796 / TC1797 / TC1793 / TC1767 | Binary, Hex, VBF (max 10MB) |
• EEPROM checksum correction • CVN fix (switchable) Note: May contain RSA checksums. Some tractor variants (EDC17CV41) cannot be checksummed. Resulting file requires tools that disable RSA verification. | VW, Audi, BMW, Mercedes, PSA, Ford, Opel, Porsche, Volvo, FCA, GM |
| Delphi Full Family (DCM / MT) |
DCM Series (Renesas): DCM3.2, DCM3.3, DCM3.4, DCM3.5, DCM3.7, DCM6.2, DCM6.3, DCM6.4, DCM7.x (patch-based), CRD3 (Mercedes) MT Series (Tricore): MT05, MT10, MT22, MT22.1, MT22.2, MT32, MT38, MT60, MT62.1, MT80, MT86, MT90, MT92, MT240, HV-240 series | Freescale MPC55xx / MPC56xx / Infineon Tricore / Renesas SH7055 / SH7058 | Binary, Hex (up to 6MB) |
• EEPROM support (DCM3.3+) • Extended MT variants Warning: DCM7.xx uses experimental patch method, not traditional checksum. Cannot guarantee compatibility with all tools. | Renault, Nissan, Infinity, Mercedes CRD3, Ford, PSA, Hyundai, Kia, GM, Opel, Tata, commercial trucks |
| Magneti Marelli Full Family |
IAW Series (Gasoline): IAW 4LV, 4MV, 4EF, 4SF, 5AM, 5AF, 5NF, 6KPI, 7GF, 7SM MJD Series (Diesel): MJD6F3, MJD8F2, MJD8DF, MJD10F3, MJ8DF, MJ9DF MM Series (Modern MPC): MM6LP, MM6LP2, MM7GV, MM8GF, MM8GM, MM8GV, MM8DS, MM8GML, MM8GMF, MM8GSF, MM8GMK, MM8GSW, MM9GC, MM9GF, MM10GF, MM10GP, MM10JA, MM11GP | ST10F275 / Freescale MPC555 / MPC561 | Binary, Hex |
• EEPROM support (MM8, MM10, MM11 series) • Automatic EEPROM block detection • Flash and EEPROM integrity validation | Fiat, Alfa Romeo, Lancia, Jeep, Abarth, Iveco |
| Siemens / Continental (SID / SIMOS / PCR / EMS) |
SID Series (Diesel): SID201-212, SID310, SID603, SID807, SID807EVO, SID801-804, SID902-906 SIMOS Series (Gasoline): SIMOS 8.x, 10.x, 11.x, 12.x, 16, 16.21, 18, 19, SIM2K-240/250/260/305/341/510, SIRIUS D52, SIRIUS34 Other: PCR2.1, EMS2.x, EMS3.x, EMS2208, EMS2219, EMS2303, EMS27xx, MSD87, TCU variants (50+ variants) | Renesas SH705x / SH725xx / Infineon Tricore | Binary, Hex, VBF |
• RSA patch (beta) for SIM2K-250/260/305 • TCU transmission support Note: RSA patch is experimental and may not work with all flashing tools. | VW, Audi, Skoda, Seat, Renault, Volvo, Ford, Kia, Hyundai, Peugeot, Citroën, Chevrolet, Dacia, Cadillac, BMW |
| Denso (16-bit / 32-bit) |
16-bit: SH7055, SH7058, SH7059, 175822, MB275800 (Toyota, Mazda, Lexus, Nissan Primera/X-Trail) 32-bit: SH72531, SH72543, SH72546 (Mazda MX-5, Mazda 6) Multiple file sizes: 0x3C000 to 0x800000 | Renesas SH705x (16-bit) / Renesas SH725xx (32-bit) | Binary, Hex |
• Toyota checksum algorithm • Wide file size range support • Japanese OEM specific variants | Toyota (all models), Mazda, Lexus, Subaru, Suzuki, Nissan, Ford |
| Transtron (Isuzu / Hino) | Transtron 4JJ1, 4HK1, 4HE1 engine families, Isuzu NPR, Isuzu NQR commercial trucks | Renesas SH725xx 32-bit | Binary, Hex (multiple file sizes) |
• Commercial truck diesel ECUs • Multiple engine family support | Isuzu commercial trucks, Hino trucks |
| 🚜 Phoenix (John Deere Agricultural) |
L-Series: L11, L12, L14, L15, L16, L21 (0x200000), L33 (0x100000, 0x400000) P-Series: P210, P273, P292 J-Series: J341 Other: VP44, EST50, Phoenix CR (Common Rail), Phoenix MPC/ST10 variants | Freescale MPC5xx (MPC555/561) / ST10F275 | Serial, OBD2, Byteshooter, CMD/Dimsport formats |
• Multiple file format support • Agricultural/construction equipment specialized • Complete Phoenix ECU family coverage File formats: Serial readouts, OBD2 (ST10), Byteshooter, CMD Flash/Dimsport files | John Deere tractors, harvesters, combine harvesters, forage harvesters, cotton pickers, backhoe loaders, excavators, wheel loaders, motor graders, dozers, sprayers, planters, tillage equipment |
| TRW (Volvo Trucks) |
EMS Series: EMS2, EMS2.2, EMS2.3 (RSA protected), EMS2.4, EMS3.2, Mack MP7 EMS2 ACM: Aftertreatment Control Module (EMS2.3 variants) File sizes: 0x840000, 0x844000 | Freescale MPC561 / MPC555 / MPC5566 | Binary, Hex, Serial |
• Commercial truck diesel ECUs • Aftertreatment module support Warning: EMS2.3 cannot be checksummed due to RSA signature protection | Volvo Trucks, Renault Trucks, Mack Trucks |
| Opel / GM Delco (E-series) |
Engine ECUs: E37, E39, E67, E69, E78, E80, E82, E83, E87, E88, E92, E98, E99 TCU: E41 (Transmission Control Unit) | Freescale MPC55xx / MPC56xx | Binary, Hex (2-6MB) |
• CVN fix (switchable) • Bootloader checksum • Operating system checksum • Code area checksum • Transmission control support Critical: Requires unmodified original or properly corrected original as basis | Opel, Vauxhall, Chevrolet, Buick, Cadillac, Holden, GMC, Colorado |
Get pre-verified, ready-to-flash ECU files with professional checksum correction. Avoid write failures, limp mode, and ECU errors.
🚜 Agricultural & Construction Equipment Coverage
TuningBot supports Phoenix ECU family used in John Deere agricultural tractors, harvesters, and construction equipment. This includes full checksum correction for all L-series (L11 through L33), P-series (P210, P273, P292), J-series (J341), VP44, and EST50 controllers across multiple file formats (Serial, OBD2, Byteshooter, CMD/Dimsport).
⚠️ Important Technical Notes
- RSA Checksums: Bosch MDG1/MG1/MD1, EDC17/MED17, and some Siemens ECUs may contain RSA checksums that cannot be calculated. Resulting files require tools that disable RSA verification. Always use genuine, unmodified original files as basis.
- EEPROM Requirements: EEPROM checksum correction only works with an unmodified original or properly corrected original as project basis. Modified or cloned files will produce incorrect checksums.
- Experimental Features: DCM7.xx uses patch-based correction (not traditional checksum). SIM2K RSA patch is in beta. These features are provided as-is and may not work with all flashing tools.
- Helper 3 Algorithm (GM/Delco): Requires an unmodified or properly corrected original file. Using modified files as basis may brick the ECU.
- Agricultural ECUs: Phoenix controllers support multiple file acquisition methods (Serial, OBD2, Byteshooter, CMD/Dimsport). Ensure correct file format when ordering.
About ECU Checksum (Quick Technical Overview)
- When it’s required: after map changes, cloning/immo off, OS or segment swaps, EEPROM edits.
- Common issues with bad checksum: write aborted, no-start, fan always on, MIL on, limp mode.
- Where it applies: main flash and often EEPROM (Bosch MED/EDC17, MD1/MG1; Marelli IAW/MJD; Delphi DCM/MT; Siemens/Continental SID/SIMOS/EMS; Denso/Transtron; TRW; Phoenix agricultural ECUs; Opel/GM Delco).
Best practice: always validate checksums before flashing. If you are unsure, add the
Checksum Correction add-on and we will return a pre-verified file ready to write.
Additional ECU Coverage (Legacy ECUs)
The following legacy ECUs are also supported by our checksum correction service. All of them can be handled as an optional service when you purchase a tuning file.
- Bosch EDC PLCC
- Bosch EDC15 29F400
- Bosch Alfa CR
- Bosch BMW CR
- Bosch PSA HDi
- Bosch VW 115cv
- Siemens BMW MS41/MS42
- Bosch Smart E2/E3/E4
- Bosch Fiat E3 JTD
- Bosch Merc 1MEG
- Bosch Mer Gasoline
- Volvo V70 F400/F800
- Siemens F200/F400
- Bosch VAG ME7 F400/F800
- Bosch EDC15 29F400 V2
- Bosch ME 3.2 / 7.3
- Bosch Nissan TDDI
- Siemens HDI
- Siemens Renault 29F200/29F400
- Siemens Volvo T4
- Siemens MS43
- Siemens Rover
- Bosch ME7 Alfa/Hyundai
- Cherokee CDI
- Siemens Ford SIM
- Ford TDCi
- Bosch BMS46
- Bosch Peugeot ME7
- Bosch Volvo CR2 (2003)
- Bosch Smart CDI E3
- Bosch BMW ME7
- Bosch Porsche ME7.8
- Siemens Ford TDCi (2004)
- IAW 4AF/59F/5AF
- Marelli 5NF E4
- Delphi Ford TDCi
- Ford EECV / EECVI
- Siemens Truck F400
- Marelli MJD
- Marelli 6LP
- Siemens BMW MSS5x
- Siemens Mini/Rover v5
- Siemens SIM4KLE
- Delphi CR / Euro4 CR
- Delco Opel
- Fiat IAW 4SF/4DF/5SF
- Bosch Alfa JTS E4
- Bosch PSA M7.4.5
- Temic Mercedes CDI / Axor
- Sagem S2000/S3000
- Bosch Fiat ME7.9.x
- Bosch Alfa MED7.6.1
- Bosch PSA/Toyota M7.9.5
- Bosch Smart 2007 ME7.7
- Bosch VAG ME7.1.1 / ME7.5.x
- Visteon DCU
- Hitachi ECUs
- Siemens SIM82 / SIMTEC75/76
- Siemens EMS200
- Bosch PSG16
- Bosch TDI v2
- EFI Lotus
- Siemens PPD
- Delphi DCM3.x
- Bosch M3.x
- Bosch Opel ME7.x
- Generic 16-bit / 8-bit ECUs
Coverage is updated frequently. If your ECU is not listed, contact support and include your flash/EEPROM readout.