Xprog-M read Mercedes W203 mask 4J74Y
When using Xprog-M to read the Mercedes W203 mask 4J74Y (which is typically an MC68HC908AZ60A or MC68HC05 series MCU), users have had mixed experiences, depending on the version of Xprog-M, their connection setup, and the specific conditions of the chip.
VXDAS.com will show you an overview of typical reviews and challenges:
Success Reports
● Xprog-M V6.50 and earlier: Some users have successfully read and programmed the 4J74Y mask with Xprog-M V6.50, provided that the connections were set up correctly and the software version supported the chip.
● Correct Pinout and Voltage: Those who managed to read the chip often emphasize the importance of using the correct pinout and ensuring proper voltage levels to avoid damaging the chip.
● Crystal Oscillator Connection: Success stories also indicate that the connection of the external crystal oscillator is crucial for stable communication with the 4J74Y chip.
Challenges Reported
● Chip Encryption: One of the major challenges with the 4J74Y chip is that it's an encrypted MCU. Many users report issues when trying to read encrypted data. Xprog-M might need specific security bypass techniques (e.g., lifting certain pins or using a BDM adapter) to successfully access and read data.
W203 1J35D R270 BDM programmer
● Software Bugs/Errors: Some users with V6.50 and lower versions have encountered software bugs that prevented successful reads. This could include communication errors, incomplete reads, or software crashes during the process.
● High-Risk Operations: Some reviewers warn that attempting to read this chip without proper setup can result in "bricking" the ECU or damaging the MCU, especially if voltage settings or connections are wrong.
Alternatives for Reliable Reading
● UPA-USB or Carprog: Users who faced challenges with Xprog-M often switch to tools like UPA-USB, Carprog, or even Orange5, which are said to handle the security and encryption on these Motorola MCUs more effectively.
● Advanced Decryption Tools: For more complex operations, some professionals use additional decryption hardware or software to bypass the encryption on the 4J74Y mask.
Conclusion
Xprog-M V6.50 can potentially read the Mercedes W203 mask 4J74Y, but success highly depends on:
● Correct hardware connections and proper voltage settings.
● Whether the chip is encrypted and how Xprog handles that encryption.
● The version and stability of the Xprog software.
If you're facing difficulties, considering other tools like UPA-USB or Carprog might offer better reliability for this specific task.
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