68HC16Y5

The Denso ECU inside 2001–2004 Subaru models is built around the Motorola 68HC16Y5 (HC16) 16-bit CPU — not the SuperH chips of the later families. Before release 0.7.6 this family was mislabelled SH7055 (one CPU generation off); the 16-bit units are Motorola HC16, so they are never disassembled as SuperH.

Detection

CAL ID at 0x200, 0x02 0x40 marker before it, CACopyrightDENSO2002 anchor. Proven checksum-free: a full single-byte mutation probe changes no other byte.

Checksums: none — proven checksum-free (full mutation probe).

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