GB 15740-2024 Protective device against unauthorized use of motor vehicles
1 Scope
This document specifies general requirements, special requirements and test methods of protective device against unauthorized use of motor vehicles.
This document is applicable to device to prevent unauthorized use for Class M and Class N motor vehicles and immobilizer for Class M1 and Class N1 motor vehicles with a maximum design total mass of not more than 20,000 kg.
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB 12676 Technical requirements and testing methods for commercial vehicle and trailer braking systems
GB/T 19951 Road vehicles - Disturbances test methods for electrical/electronic component from electrostatic discharge
GB 21670 Technical requirements and testing methods for passenger car braking systems
GB/T 28046.4-2011 Road vehicles - Environmental conditions and testing for electrical and electronic equipment - Part 4: Climatic loads
GB 34660-2017 Road vehicles - Requirements and test methods of electromagnetic compatibility
GB/T 40428-2021 Electromagnetic compatibility requirements and test methods of conductive charging for electric vehicles
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
device to prevent unauthorized use
device comprising a system designed to prevent illegal normal starting of an engine or other main power source of a vehicle and at least one of the systems listed below:
a) steering mechanism locking system;
b) drive system locking system;
c) shift mechanism locking system;
d) brake locking system.
3.2
steering
steering wheel, steering column and its cover, steering shaft, steering gear and all components that directly affect the effectiveness of the device to prevent unauthorized use
3.3
combination
various combinations of specially designed and manufactured start locking systems
3.4
key
device corresponding to a mechanical and/or electronic solution for operating the locking system, and the locking system can only be operated by it
3.5
digital key
keys designed to be authorized by the primary user and transmitted to multiple units or devices through dedicated programs
Note: The primary user refers to the user who can authorize the vehicle to use the digital key, and the vehicle has one or more primary users.
3.6
rolling code
combination of several elements and electronic code that changes randomly after each operation of the transmitting unit
3.7
immobilizer
device that prevents a vehicle from running normally by its own power, as part of device to prevent unauthorized use
3.8
set state
state of the immobilizer when the vehicle cannot run normally by its own power
3.9
unset state
state of the immobilizer when the vehicle can run normally by its own power
3.10
override
design feature in which the immobilizer can still be locked in the unset state
4 General requirements
4.1 The device to prevent unauthorized use shall be designed to complete the following operations when it is not functional:
a) starting the vehicle power system in a normal manner;
b) steering, driving or advancing the vehicle with its own power.
4.2 Before or simultaneously with the actions described in a) and b) in 4.1, the device to prevent unauthorized use shall be able to function properly.
4.3 Using the same key shall meet the requirements of 4.1 and 4.2.
4.4 Except in the case described in 5.1.5, for a system that operates by inserting the key into the lock, the key shall not be pulled out until the vehicle state described in 4.1 has started or is in the starting position.
4.5 The device to prevent unauthorized use and the parts of the vehicle related to its operation shall be designed to ensure that the device to prevent unauthorized use will not be quickly and unintentionally opened or damaged or invalid by low-cost, easily concealed, easily carried or manufactured tools.
4.6 The device to prevent unauthorized use shall be installed on the vehicle as an original component. It shall be installed in such a way that it cannot be disassembled when it is in a locked state, even when its housing is removed, without the use of special tools. If a device to prevent unauthorized use is invalid by removing the screw, the screw shall be covered by the parts fixed to the device or the anti-removal screw shall be used.
4.7 The keys used in the mechanical locking system shall include no less than 1,000 different combinations. If less than 1,000 vehicles are manufactured in a year, the number of combinations shall be at least equal to the number of vehicles. For all vehicles of the same model, the occurrence rate of the same combination shall not be greater than 1/1,000.
4.8 For Classes M1 and N1 motor vehicles with electric/electronic locking systems (such as remote control locks), there shall be at least 50,000 variations with rolling codes and/or a minimum scanning time of 10d or at least 24h to scan 5,000 variations.
4.9 The motor vehicles equipped with digital keys [including but not limited to Bluetooth communication, near field communication (NFC), ultra-wideband communication (UWB), cellular mobile communication, etc.] shall meet:
a) The digital key shall be bound to the physical carrier;
b) The digital key and the device to prevent unauthorized use shall be able to be matched and authenticated;
c) The digital key shall have measures to prevent replay attacks:
d) Unlocking the device to prevent unauthorized use shall ensure that the digital key is detected to be in the vehicle or within 6m of the vehicle. This requirement is not applicable to Remote Metering and Control (RCM) and Remote Control Parking (RCP) functions;
e) Unlocking the immobilizer shall ensure that the digital key is detected in the vehicle, or the driver consciously triggers the operation within 6m of the vehicle. The distance limit to unlock the immobilizer shall be within 2m of the vehicle after the digital key is detected inside the vehicle. This requirement is not applicable to Remote Metering and Control (RCM) and Remote Control Parking (RCP).
Contents Foreword ii Introduction iii 1 Scope 2 Normative References 3 Terms and Definitions 3 Dimensions 4 Marking 5 Technical Conditions 6 Mass of Riveted Nuts Annex A (Informative) Mass of Flat Head Riveted Nuts Bibliography
