• There are no items in your cart

ISO 11451-4:2022



The latest, up-to-date edition.

Road vehicles Vehicle test methods for electrical disturbances from narrowband radiated electromagnetic energy Part 4: Harness excitation methods

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users



Published date


This document specifies harness excitation methods for testing the electromagnetic immunity of electronic components for passenger cars and commercial vehicles regardless of the propulsion system (e.g. spark-ignition engine, diesel engine, electric motor).

The bulk current injection (BCI) test method is based on current injection into the wiring harness using a current probe as a transformer where the harness forms the secondary winding. The tubular wave coupler (TWC) test method is based on a wave coupling into the wiring harness using the directional coupler principle.

The TWC test method was developed for immunity testing of automotive components with respect to radiated disturbances in the GHz ranges (GSM bands, UMTS, ISM 2,4GHz). It is best suited to small (with respect to wavelength) and shielded device under test (DUT), since in these cases the dominating coupling mechanism is via the harness.

The electromagnetic disturbance considered in this document is limited to continuous narrowband electromagnetic fields.

ISO11451-1 gives definitions, practical use and basic principles of the test methods.

International Organization for Standardization

Standards Relationship
SS-ISO 11451-4:2022 Identical

SAE J2284/4:2022 High-Speed CAN (HSC) for Vehicle Applications at 500 kbps with CAN FD Data at 2 Mbps
SAE J2284/2:2016(S2023) High-Speed CAN (HSC) for Vehicle Applications at 250 kbps(STABILIZED May 2023)

View more information
Excluding VAT

Access your standards online with a subscription


  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.