GB 45672-2025On-board accident emergency call system (English PDF)

1 Scope

GB 45672-2025 is the Chinese national standard on on-board accident emergency call system, in the field of road vehicles engineering. It carries no /T suffix, which in the Chinese system means compliance is mandatory: a product or a practice within its scope has to meet it to be lawfully made, sold or carried out in China. It was issued on 25 April 2025 by the State Administration for Market Regulation; Standardization Administration of China, and takes effect on 1 July 2027. Classification: ICS 43.020, CCS T04. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This document specifies the technical requirements and identical type determination requirements for on-board accident emergency call systems, and describes the corresponding test methods. This document is applicable to the on-board accident emergency call system of M1 and N1 vehicles.

2 Normative references

The provisions of the following documents constitute the essential clauses of this document through normative references in this text. Among them, for referenced documents with dates, only the versions corresponding to the dates are applicable to this document; for referenced documents without dates, the latest versions (including all amendments) are applicable to this document.

GB 11551-2014 The protection of the occupants in the event of a frontal collision for motor vehicle

GB/T 15089 Classification of power-driven vehicles and trailers

GB 16735 Road vehicle - Vehicle identification number (VIN)

GB 20071-2025 The protection of the occupants in the event of a lateral collision

GB 20072-2024 The requirements of safety in the event of rear-end collision for passenger car

GB/T 20913-2007 The protection of the occupants in the event of an off-set frontal collision for passenger car

GB 34660-2017 Road vehicles - Requirements and test methods of electromagnetic compatibility

GB 39732-2020 Vehicle event data recorder system

GB/T 43187-2023 On-board wireless communication terminal

GB/T 45086.1-2024 Technical requirements and test methods for on-board positioning system - Part

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 on-board accident emergency call system; AECS A system that is automatically activated by the vehicle's internal strategy when an accident occurs, or manually triggered by someone in the vehicle, and synchronously sends the vehicle's location and vehicle-related status information to the emergency call service platform and establishes a voice communication.

3.2 on-board wireless communication terminal An electronic device installed in a vehicle that can establish connections and exchange information through technologies such as cellular mobile communications. NOTE. The on-board wireless communication terminal is usually composed of components such as a transmitter, receiver, antenna, controller, and cables. [Source: GB/T 43187-2023, 3.1]

3.3 emergency call service platform A service platform that responds to or transmits emergency call information issued by vehicles.

3.4 power supply The component that supplies power to the AECS.

3.5 back-up power supply The component that supplies power to the AECS in the event of a power supply failure.

3.6 on-board satellite positioning system A system installed on a vehicle, which uses radio signals transmitted by artificial satellites for positioning, velocity measurement and timing. [ Source. GB/T 45086.1-2024,3.1]

3.7 control module A module in AECS that is used to confirm the functions of all its modules.

5 Instructions

AECS-related content is described in the vehicle's "Instructions for the use of power- driven vehicles", which shall include but not be limited to. -- AECS automatic trigger type and trigger conditions; -- Instructions on AECS manual triggering method and prevention of false triggering; -- Data items recorded and sent by AECS and description of their uses; -- Explanation of AECS warning signals and information signals and related processing methods.

6 Identical type determination

6.1 For the automatic triggering requirements for AECS, if the following provisions are met, they are considered to be of the same type.

a) The vehicle's kerb mass changes by less than 8% (relative to the base vehicle type, the same below);

b) The vehicle's outer dimensions remain unchanged, and the vehicle's ground clearance remains the same or increases;

c) The structure, dimensions, profile and material of the passenger compartment side wall remain unchanged;

d) The layout (transverse or longitudinal) and position (front, middle or rear) of the drive motor or engine are the same;

e) The model, manufacturer and software version number of the AECS (its control module) and the module that generates the automatic triggering signal (e.g., airbag electronic control unit, etc.) remain unchanged, or the change of its software version number does not affect the AECS automatic triggering requirements;

f) The AECS triggering threshold remains unchanged. If the test is carried out using a slide, only

f) are used for the identical type determination.

6.2 For the information and functional requirements for AECS, if the following provisions are met, they are considered to be of the same type.

a) The model, manufacturer and software version number of the AECS (including at least the control module, on-board satellite positioning system and on-board wireless communication terminal) remain unchanged, or the change of its software version number does not affect the AECS information and functional requirements;

b) The electronic architecture and layout of AECS remain unchanged;

c) The manufacturer of the back-up power supply (if any), the capacity remains unchanged or increases (if the capacity of the back-up power supply decreases, additional tests shall be performed in accordance with 4.1.5);

d) The models and manufacturers of the warning signal devices and information signal devices of the AECS remain unchanged;

e) The AECS automatic triggering conditions [i.e. a)~f) in 6.1] remain unchanged.