: If Ktag reads a backup but fails to show ID, it may be due to an incorrect protocol version or a clone hardware limitation.
: You generally need to solder a grey wire to a specific boot point on the ECU's internal board to put it into boot mode. How to read Mercedes EDC17CP57 with Ktag 7.020 GPT cable
The EDC17CP57 is typically a metallic box. You can identify it by the sticker on the top casing. Look for the Bosch part number, often starting with . : If Ktag reads a backup but fails
The is a Bosch ECU used in Mercedes-Benz diesel engines (e.g., OM651, OM642 post-2012). KTAG 7.020 (clone) is a common tool for boot mode reading/writing. GPT cable — in this context — likely refers to the 20-pin GPT (General Purpose Trigger) adapter used for connecting to the ECU’s programming port, not a “ChatGPT cable.” You can identify it by the sticker on the top casing
The GPT cable is not a simple passthrough. It adjusts voltage levels for the Tricore. Connect – do not connect CAN-H or CAN-L for reading.
: Connect these to the designated pins (often Pin 1 and Pin 10 on specific connectors) to facilitate password decryption. Communication and Decryption
Once the password is found, the reading process for the Micro (Flash) and EEPROM will begin.