Japan: New regulation on Tire Pressure Monitoring System and Remote Keyless Entry System

 

Japan has published an amendment to the Ordinance for Enforcement of the Radio Act which defines the frequency for Tire Pressure Monitoring System and Remote Keyless Entry System in vehicles.

In the new Ordinance for Enforcement of the Radio Act and Relevant Public Notice, the frequency band from 433.795 MHz to 434.045MHz is added to the classification of Specific low power radio station and the band is used for Tire Pressure Monitoring System (TPMS) and Remote Keyless Entry (RKE) System.

Regarding the transmission time limit, the total amount per hour shall not be more than 360 seconds. In the case of periodic transmission, it is required to stop the emission of radio wave within one second after emitting radio wave, and to set the pause time to 1 millisecond or more.

The new Ordinance on Radio Equipment and Relevant Public Notice specifies the technical regulations of TPMS and RKE System.

Japan is amending the current technical regulations because:

・In TPMS and RKE System, the use of the 433 MHz band is advancing internationally.

・433 MHz band has become a global standard frequency for the use of TPMS and RKE System.

・The domestic demand of those systems is expected to increase in Japan

The proposed date of adoption and the proposed date of entry into force is February, 2025.

To find out more about automotive regulations in Japan, please do not hesitate to contact the Institute for Global Automotive Regulatory Research Directly.