The TagFlash ECU Programmer is confirmed to work perfectly with the VAG Simos 3.3A ECU for reading, writing, and performing checksum operations Full mode.

TagFlash Connection to ECU:
Refer to the image below for a visual guide on how to connect TagFlash to the VAG Simos 3.3

TagFlash Reads and Writes VAG Simos 3.3:
Refer to the image below for the writing process.

Wiring Diagram:
1.VAG SIEMENS SIMOS 3xx HW01 (Gasoline)

2.VAG SIEMENS SIMOS 3xx HW02 (Gasoline)

Conclusion:
The TagFlash ECU Programmer is a reliable tool for working with the VAG Simos 3.3A ECU, ensuring smooth and accurate read, write, and checksum operations on bench. Proper connection and driver selection are crucial for optimal performance.