Recreating Unobtainable Diagnostic Tools For The Jaguar XJ220

An owner of a rare Jaguar XJ220 (chassis #50) reverse engineered the obsolete Zytek ECU diagnostic interface after his original SPD-1039 tool became irreplaceable and impossible to open due to potting. By capturing serial traffic with a logic analyzer, he built a replacement interface using an FT232RNL USB-to-serial bridge, reusing the original DOS-based diagnostic software running in an emulator rather than rewriting it. He now distributes these modules for free to owners of XJ220, XJ220S, and XJR-15 models via a webform on Port220.com, believing it preserves and increases the value of these classic supercars.

Source: https://hackaday.com/2026/09/16/recreating-unobtainable-diagnostic-tools-for-the-jaguar-xj220. 8 Sync News only summarizes and links out; content copyright belongs to the authors and original sources.