ISO 15638-23:2025

Overview

ISO 15638-23:2025 - "Intelligent transport systems - Framework for collaborative telematics applications for regulated commercial freight vehicles (TARV) - Part 23: Tyre pressure monitoring (TPM)" defines a common framework for transmitting, accessing and managing tyre pressure monitoring (TPM / TPMS) data for regulated commercial freight vehicles. The standard specifies the form and content of TPM transmission data, access methods, application and communication profiles, and the roles and responsibilities of jurisdictions, service providers and in-vehicle systems (IVSs).

Key topics and technical requirements

• TPM data structure and naming: Defines how tyre pressure monitoring data must be named, packaged and represented to support consistent exchange between IVSs, application service providers and inspection systems.
• Application profiles (A1–A4):
  • A1 (TPM-C) - cyclical/transmitted by on‑board equipment;
  • A2 (TPM-E) - exceptional/event-driven transmissions;
  • A3 (TPM-R) - data provided in response to an off‑board request;
  • A4 (TPM-O) - roadside/off‑board reading of tyre pressures from potentially unequipped vehicles.
• Communication profiles (C1–C5): Support for multiple transport layers, including
  • ITS-station mediated downloads,
  • cellular networks (3G/4G/5G),
  • short‑range wireless interrogation for roadside inspection,
  • in‑road equipment reads.
• Quality of service, conformance and testing: Requirements for data quality, storage, test procedures, approval of IVSs and service providers, and quality monitoring.
• Security and access control: Data access control policies, approval authorities and auditing processes to protect integrity and privacy.
• Operational and regulatory aspects: Service elements covering regulation setup, contracts between operators and service providers, software upload procedures, and sequence of operations for inspection and reporting.
• Unique wheel identification and TPMS types: Provisions for uniquely identifying wheels and accommodating different TPMS technologies.

Applications and practical value

• Enables regulatory compliance for jurisdictions that mandate TPM reporting for commercial freight.
• Supports fleet safety and maintenance by standardizing remote tyre pressure data exchange for predictive maintenance and fault detection.
• Facilitates roadside inspections and remote audits using interoperable communication profiles.
• Useful for vehicle manufacturers, fleet operators, telematics providers, inspection authorities, and regulators designing or approving TPM services and IVS implementations.
• Promotes interoperability across jurisdictions and technology stacks (cellular, ITS‑station, short‑range).

Related standards

• Part of the ISO 15638 TARV series; references ISO 15638‑2 / ISO 21217 for ITS‑station communication models and other TARV framework documents.

Keywords: ISO 15638-23, tyre pressure monitoring, TPM, TPMS, TARV, intelligent transport systems, vehicle telematics, regulated commercial freight vehicles, TPM data profiles, communication profiles, remote inspection.