UNECE WP.29 R156 7.2.2.1.2: Execute updates only with enough power to complete or recover

What does 7.2.2.1.2 require?

Software updates can only be executed when the vehicle has enough power to complete the update process, including recovery to the previous version or reaching a safe state; evidenced by a description of the measures and a demonstration or physical test (ISO 24089 7.3.4.3).

Maintained by Gerard BlokdykVerified against the published standard 31 May 2026Control text last updated 21 May 2026

Other controls in Paragraph 7.2: Requirements for the vehicle type – UNECE WP.29 R156

7.2.1.1 7.2.1.1 Protect the authenticity and integrity of software updates on the vehicle
7.2.1.2.1 7.2.1.2.1 Each RXSWIN uniquely identifiable and updated on extension or new approval
7.2.1.2.2 7.2.1.2.2 RXSWIN or software versions readable through a standard interface
7.2.1.2.3 7.2.1.2.3 Protect RXSWINs and software versions on the vehicle against unauthorised modification
7.2.2.1.1 7.2.2.1.1 Restore the previous version or reach a safe state after a failed or interrupted update
7.2.2.1.3 7.2.2.1.3 Technical means ensure safe execution where an update may affect safety
7.2.2.2 7.2.2.2 Inform the user before execution: purpose, changes, duration, unavailable functions, instructions
7.2.2.3 7.2.2.3 Prevent driving and unsafe functions where execution while driving may be unsafe

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