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Bosch MEVD17.2.2 - TC1797

Bosch MEVD17.2.2 - TC1797 Support Guide

Bosch MEVD17.2.2 - TC1797

Errors

Quick access to common technical issues and their solutions for the MEVD17.2.2 control unit.

Processor ID incorrect

This error occurs during cloning operations when critical memory ranges or file end-bytes are improperly modified.

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Checksum is invalid. error code : 0x00000001

A common warning indicating that file integrity checks failed, often due to third-party modifications.

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Concerns vehicles from

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Processor ID incorrect

Method: OBD & BENCH / Recovery: BENCH

Issue: The system detects a mismatch in the processor's identification during file writing or cloning procedures.

Solution
  • Ensure that the memory range 0x17F00-0x17FFF remains strictly unchanged in your modified file.
  • Verify that the last 16 bytes of the file are identical to the original read.
  • Avoid modifying these specific sectors during a 1:1 ECU copy or cloning operation.
To understand more

When performing a clone, the TC1797 processor relies on specific security signatures located at the end of the memory map. If the range 0x17F00-0x17FFF is altered, the BENCH access protocol can be permanently disabled, resulting in a locked ECU that cannot be accessed via standard flashing methods.

Checksum is invalid. error code : 0x00000001

Method: BENCH

Issue: The ECU reports that the mathematical integrity of the file is compromised or the file format is not recognized.

Solution
  • In most scenarios involving BOSCH MEDC17 architecture, you can safely ignore this warning and proceed with the write process.
  • Confirm if the ECU was previously modified by another tuning tool, as this is the primary cause of the warning.
  • If the error persists or prevents programming during the write phase, Contact our technical support immediately.
To understand more

The 0x00000001 code indicates that the tool has detected a pre-existing invalid checksum within the ECU's memory. This typically happens when a previous tuner used a tool that didn't properly recalculate all signatures; bFlash detects this discrepancy but can usually overwrite it successfully with a corrected file.