The record — where SUMS is decided
Which software runs on each vehicle, which block combinations are approved, who approved every update — and can you prove it (RXSWIN)?
Checklist · UN R156
R156-ready? Fourteen questions decide.
UN R156 requires a Software Update Management System for type approval. The mechanism is the easy half — the record is the hard one. This checklist asks the fourteen questions your approval authority will ask, across record, mechanism, security and process.
14 questionsrecord · mechanism · security · process
From the articleECU flash programming over UDS
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Inside the checklist
The mechanism and its security
The full UDS sequence, interrupted-flash recovery, flash driver in RAM, signed images verified by the bootloader with keys anchored in hardware.
One process — not three tools
End-of-line, workshop and OTA as one managed process with one record, per ISO 24089 — with the supplier evidence your authority will ask for.