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Bosch MED17.1.1 - TC1796

Bosch MED17.1.1 - TC1796 FAQ & Error Solutions

Bosch MED17.1.1 - TC1796

Errors

Quickly identify common issues and communication errors encountered when working with the Bosch MED17.1.1 control unit.

7F-34-22 : UDS RequestDownload RX error

This error indicates an OBD writing restriction typically found on newer protected vehicle models.

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Files not found

The specific software version for your ECU is currently missing from our cloud database.

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Concerns vehicles from

Audi Bentley Lamborghini Porsche Volkswagen

7F-34-22 : UDS RequestDownload RX error

Method: OBD

Issue: You are attempting to write to the ECU via OBD, but the vehicle's security protocols are blocking the download request.

Solution
  • Currently, there is no known OBD solution for this specific error on these protected models.
  • If the vehicle is a brand-new model, it likely features updated OBD protection.
  • For further assistance or to check for future updates, please Contact our technical support.
To understand more

The error code 7F-34-22 is a UDS (Unified Diagnostic Services) negative response indicating that the RequestDownload service was rejected. This is a clear sign that the ECU's security gateway or internal OBD protection is preventing unauthorized memory modifications on newer VAG group vehicles.

Files not found

Method: OBD / Recovery: Bench

Issue: bFlash was unable to find the virtual read or matching calibration files on the server for your ECU version.

Solution
  • Switch your connection method and perform a BENCH read of the ECU.
  • Save the full backup file generated by the bench read.
  • Send the file to support@bflash.eu along with your vehicle details.
  • Our team will analyze and add the file to the server to enable future OBD operations.
To understand more

When bFlash reports "Files not found," it means the unique software ID of your MED17.1.1 is not yet in our master database. By performing a Bench read, you extract the physical data directly from the ECU pins, allowing us to map the file and support your specific vehicle version.