Tag: UDS
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Discovery 3 CAN Bus, Part 10: The EXML Files and What We’re Still Hunting
SDD stores diagnostic configuration in EXML — JLR’s proprietary encrypted XML format. We cracked the Triple DES encryption, decrypted 2,033 EXML files, and found the RLM’s diagnostic data map. But the real prize — the calibration amplitude vs offset parameters — is still out there.
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Discovery 3 CAN Bus, Part 7: Cracking the Ford Security Algorithm
Before you can write calibration data to an ECU, you need to pass Security Access. We found the Ford KeyGenMkI algorithm, confirmed the 24-bit LFSR seed in SecAlg.dll, and extracted the RLM’s secret diagnostic keys from SDD’s encrypted Security.exml.
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Discovery 3 CAN Bus, Part 9: Building Our Own UDS Diagnostic Tool
Building a Python UDS diagnostic tool for the Discovery 3 air suspension RLM module. Using a LilyGO ESP32 CAN board with full ISO-TP transport, Ford KeyGenMkI security unlock, auto CAN-ID scanning across HS-CAN and MS-CAN, and an interactive UDS shell.