Toolbox / IECS Tools

Unlock Challenge Builder

Build IECS Unlock request challenges from an ECU ID — set unlock level, seed bytes, and optionally batch up to 100 with incrementing sequence numbers.

Configure

ECU ID as 32-char hex or Base64. Each challenge is 32 bytes on the wire.

Seed ECU ID

Unlock level (byte 0)

Default 1 (0x01 — Level 1); decimal or 0x hex

Challenge count (optional)

1–100; increments ECU sequence bytes

Seed bytes 17–31

Base URL (optional — for full request link)

Sample ECU IDs

One example per ECU ID format — click to load as the seed ECU.

Generated challenges appear here

Set ECU ID and options on the left, then click Generate challenges.