A specialized software kit for repairing certain Audi/Volkswagen (VAG) ABS control units that use the Texas Instruments TMS570LS3135 processor.
Key Features Explained:
- EEPROM Reading/Writing via CPU: The primary function is to read and write the data on the EEPROM chip (type 95256) by connecting directly to the main processor (CPU), rather than by removing the memory chip from the circuit board. This is useful when the memory chip is difficult to access physically.
- C123EF0 Error Code Calculator: This is a significant bonus feature. It addresses a specific, common problem:
- The Problem: After multiple vacuum pump errors, the ABS unit permanently stores a “C123EF0” error code that cannot be erased with standard diagnostic tools, forcing a costly replacement of the entire ABS unit.
- The Solution: The included calculator tool allows a technician to reset the internal counter for this error. Once reset, the error can then be cleared using a normal diagnostic scanner, saving the ABS unit from being replaced.
- What’s Included in the Kit: The kit is sold on a USB flash drive and contains:
- Software for reading and writing the EEPROM data (“dumps”);
- Wiring diagrams showing how to connect to the CPU;
- DTC C123EF0 clear calc;
- A bonus binary file editor for modifying the data dumps.
Important Clarification / Disclaimer:
The text includes a critical note (marked with an asterisk *):
- The kit only provides the software for EEPROM access.
- To actually read and write the data to the processor, you need to use a separate program called “JLinkZReader” and the corresponding hardware (a J-Link debug probe), which must be purchased separately from another source. This kit does not include it.