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Open the folder where you installed E-Sys (usually C:\EC-Apps\Data ).

If you are using a significantly newer or older PSdZData version, matching the E-Sys release date is essential. For instance, a PSdZData from 2015 (like v3.55.0) pairs best with E-Sys 3.26.1, while versions from around late 2020 (such as v.4.27.20) work smoothly with E-Sys 3.27.1. By late 2025, releases like PSdZData 4.56.32 require E-Sys 24.06.01 to avoid calculation errors. v42720 psdzdata lite download install

(changing options and features) on F, G, and I-series vehicles. Open the folder where you installed E-Sys (usually

Note: Always ensure your battery charger is connected to the vehicle before performing any diagnostics or coding sessions using ISTA. v42720 psdzdata lite download install