ECUHELP KT200II ECU Programmer has been successfully tested for OBD read/write the EDC16U31 ECU in the Audi A3 8P 1.9 TDI 105, and EGR Off ok.

Look at these images of reading edc16u31 100% with KT200II.

Meanwhile, KT200II is possible to read/write edc16u31 on Bench.
Please click on “Info” for the wiring diagram, applied to BOSCH EDC16 U31 [ MPC563/4 ] – Audi, VW, Seat, Skoda [Diesel]:
Connect the multifunction cable as follows, use the Bench Box:

To read and write use the following driver:
→ BENCH MODE
→ [brand]
→ MPC563/4 – [brand]
→ EDC16 U31

Conclusion:
ECUHELP KT200II ECU Programmer provides a reliable solution for OBD and bench operations on the EDC16U31 A3 8P 1.9 TDI 105 ECU, including EGR Off.