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Bosch MED17.5 - TC1766

Bosch MED17.5 - TC1766 | bFlash FAQ

Bosch MED17.5 - TC1766

Errors

Find quick solutions to common programming issues encountered with the Bosch MED17.5 control unit.

Checksum is invalid. error code : 0x00000001

This warning signifies that the file contains mathematical inconsistencies or is unrecognized by the ECU logic.

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[UART_CAN API] No data to read : KWP Ping Rx error

Communication failure caused by high security levels (TPROT) preventing BENCH protocol access.

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Concerns vehicles from

Audi Seat Skoda Volkswagen

Checksum is invalid. error code : 0x00000001

Method: BENCH

Issue: The system detects an integrity error in the file data or a modification that the Bosch MED17.5 hardware does not validate.

Solution
  • On most BOSCH MEDC17 units, you can safely ignore this warning.
  • Proceed with the programming phase normally.
  • If the error persists or re-appears during the actual writing process, stop immediately and Contact our technical support.
To understand more

This typically occurs when a file was previously modified by a different flashtool that calculated the checksums differently. While bFlash identifies the discrepancy, the internal logic of the TC1766 processor often allows the write to proceed if the main data blocks are correct.

[UART_CAN API] No data to read : KWP Ping Rx error

Method: BENCH / Recovery: BOOT

Issue: The ECU refuses to respond to the KWP (Keyword Protocol) ping request over the BENCH connection.

Solution
  • Switch the programming method from BENCH to BOOT mode.
  • Follow the specific wiring diagram for TC1766 in Boot mode to bypass security restrictions.
  • Directly access the processor for reading and writing to overcome the protocol blockage.
To understand more

Certain Infineon Tricore TC17x6 variations utilize a high level of TPROT (Tuning Protection). This security layer actively blocks external flashtools from using standard diagnostic-based protocols like BENCH, requiring a hardware-level BOOT connection for successful data transfer.