GB 15740-2024 PDF English
US$320.00 · In stock · Download in 9 secondsGB 15740-2024: Protective device against unauthorized use of motor vehicles Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedureStatus: Valid GB 15740: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 15740-2024 | English | 320 |
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Protective device against unauthorized use of motor vehicles
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| GB 15740-2006 | English | 115 |
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Protective devices against unauthorized use of motor vehicles
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| GB 15740-1995 | English | 199 |
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Motor vehicle--Protective devices against unauthorized use--Performance requirments
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GB 15740-2024: Protective device against unauthorized use of motor vehicles---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB15740-2024
GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 43.040.60
CCS T 26
Replacing GB 15740-2006
Protective device against unauthorized use of motor vehicles
Issued on. SEPTEMBER 29, 2024
Implemented on. JANUARY 1, 2026
Issued by. State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 General requirements... 7
5 Special requirements... 10
6 Special requirements for electromechanical or electronic devices to prevent
unauthorized use... 13
7 General requirements for immobilizers... 13
8 Special requirements for immobilizers... 14
9 Requirements for additional equipment... 16
10 Identical type determination... 16
11 Implementation of the Standard... 17
Appendix A (Normative) Wear cycle test... 18
Appendix B (Normative) Strength test... 23
Appendix C (Normative) Environmental test... 26
Appendix D (Normative) Electromagnetic compatibility test... 31
1 Scope
This document specifies the general requirements, special requirements and test
methods for devices to prevent unauthorized use of motor vehicles.
This document applies to devices to prevent unauthorized use for M category and N
category vehicles, and to immobilizers for M1 vehicles and N1 vehicles with a maximum
design gross mass not exceeding 2000 kg.
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 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/T 30038 Road vehicles - Degrees of protection (IP-Code) - Protection of
electrical equipment against foreign objects, water and access
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
The following terms and definitions apply to this document.
3.1 device to prevent unauthorized use
A device consists of a system that is designed to prevent the unauthorized starting of
the engine or other main power source of the vehicle and at least one of the following
systems jointly.
3.2 steering
The steering wheel, steering column and its covering parts, steering shaft, steering gear
and all parts that directly affect the effectiveness of the device to prevent unauthorized
use.
3.3 combination
Specially designed and manufactured combination of starter locking systems.
3.4 key
A device corresponding to mechanical and/or electronic solutions for operating a
locking system, which can only be operated by means of this device.
3.5 digital key
A key designed to be transferred to multiple devices or equipment through a dedicated
procedure, authorized by a primary user.
NOTE. A primary user refers to a user who can authorize the vehicle to use the digital key. A vehicle has
one or more primary users.
3.6 rolling code
An electronic code consisting of a combination of several elements that changes
randomly after each operation of the transmitting unit.
4 General requirements
4.1 The device to prevent unauthorized use shall be designed to ensure that the
following operations can be completed only when it is inoperative.
4.2 Before or simultaneously with the actions described in a) and b) of 4.1, the device
to prevent unauthorized use shall be able to operate normally.
4.3 The use of the same key shall be able to meet the requirements of 4.1 and 4.2.
4.4 Except as provided in 5.1.5, for systems that operate by inserting a key into a lock,
the key shall not be removed until the vehicle has been started or is in the starting
position as provided in 4.1.
4.5 The design of the device to prevent unauthorized use and the parts of the vehicle
related to its operation shall ensure that the device to prevent unauthorized use cannot
be opened quickly and accidentally or damaged or rendered ineffective by low-cost,
easily concealed, easy to carry or manufacture tools.
4.6 The device to prevent unauthorized use shall be installed on the vehicle as an
original part. Its installation method shall ensure that when it is in a locked state, it
cannot be disassembled without the use of special tools even if its housing is removed.
If the removal of the screws makes the device to prevent unauthorized use ineffective,
the screws shall be covered by parts fixed to the device to prevent unauthorized use, or
anti-disassembly screws shall be used.
4.7 The keys used in the mechanical locking system shall include no less than 1,000
different combinations. If fewer than 1,000 vehicles are manufactured in a year, the
number of combinations shall be at least equal to the number of vehicles. The
occurrence rate of the same combination in all vehicles of a certain model shall not be
greater than 1/1000.
4.8 For M1 and N1 vehicles with electric/electronic locking systems (such as remote
control locking), there shall be at least 50,000 variations programmed into rolling codes
and/or a minimum scanning time of 10 days or at least 24 hours to scan 5,000 variations.
4.9 Motor vehicles equipped with digital keys (including but not limited to those using
Bluetooth communication, near field communication (NFC), ultra-wideband
communication (UWB), cellular mobile communication, etc.) shall meet the following
requirements.
4.10 There shall be no visible codes on locks and keys.
4.11 For mechanical key devices to prevent unauthorized use, the design, manufacture
and installation of the lock shall ensure that when it is in the locked position, the lock
cylinder cannot be turned with a torque less than 2.45 N • m using any key other than
the key provided, and.
4.12 When the vehicle is in motion, the device to prevent unauthorized use shall not be
locked due to any accidental operation error or accidental locking that may endanger
safety, and shall meet the following requirements.
unauthorized use. The device to prevent unauthorized use shall be able to remain in the
locked position without the need for auxiliary power.
4.14 Before the device to prevent unauthorized use is released, the vehicle's power
system cannot be started in the normal way.
4.15 For devices to prevent unauthorized use equipped with brake locking systems, the
release of the locking device shall not automatically release the brakes against the
driver's intention when the brakes are locked. For devices to prevent unauthorized use
equipped with brake locking systems that prevent the release of vehicle brakes, the
working part acting on the brake is only allowed to maintain the locked position by
purely mechanical means. In this case, the provisions of 4.14 do not apply.
4.16 For devices to prevent unauthorized use equipped with a driver reminder function,
when the driver's door is opened, if the device to prevent unauthorized use is not
activated or the key is not removed, the reminder function shall be activated.
4.17 Motor vehicles of M1 and N1 with a maximum design gross mass not exceeding
2000 kg shall be equipped with an immobilizer and shall comply with the requirements
of Chapter 7 and Chapter 8.
4.18 Electromechanical and electronic devices to prevent unauthorized use (such as
electronic steering locking system, electronic transmission locking system, electronic
shift mechanism locking system and electronic brake locking system) shall comply with
the special requirements of Chapter 4, Chapter 5 and Chapter 6.
5 Special requirements
5.1 Devices to prevent unauthorized use acting on the steering mechanism
5.1.1 The device to prevent unauthorized use acting on the steering locking system shall
be able to disable the steering. The steering function shall be able to be restored before
the power system starts normally.
5.1.2 When the anti-theft function is disabled, the device to prevent unauthorized use
shall not hinder the steering function of the vehicle.
5.1.3 The devices to prevent unauthorized use of M1 and N1 vehicles shall comply with
the requirements of 4.12, 5.1.1, 5.1.2 and 5.1.4 after being subjected to a wear test of
2500 locking cycles in each direction according to the test method specified in A.2.1 of
Appendix A. The devices to prevent unauthorized use of other types of vehicles shall
comply with the requirements of 4.12, 5.1.1, 5.1.2 and 5.1.4 after being subjected to a
wear test of 2500 locking cycles in each direction according to the test method specified
in A.2.2.
5.1.4 When the device to prevent unauthorized use is in the locked position, it shall
meet one of the following requirements.
5.1.5 If the mechanical key of the device to prevent unauthorized use can be pulled out
from a position other than the position for locking the steering mechanism, the design
shall ensure that the manual operation to reach the position and the action of pulling out
the mechanical key shall not be achieved unintentionally.
5.1.6 For M1 and N1 vehicles, if the steering system remains locked and some
components fail when the torque specified in 5.1.4a), 5.1.4b) or 5.1.4c) is applied, the
system complies with the requirements.
5.2 Devices to prevent unauthorized use acting on the transmission locking system
or brake locking system
5.2.1 The device to prevent unauthorized use acting on the transmission locking system
shall be able to prevent the vehicle's driving wheels from rotating.
5.2.7 Under the condition that the transmission system does not suffer damage that
endangers safety, the device to prevent unauthorized use shall be tested according to the
test method specified in B.2.3 and shall be able to withstand a static torque of 1.5 times
the maximum torque applied in both directions under static conditions of the
transmission system locking system. The maximum torque that can be transmitted by
the clutch or automatic transmission is taken as the maximum torque.
5.2.8 For devices to prevent unauthorized use acting on the brake locking system, the
vehicle shall be tested according to the test method specified in B.2.4 and the vehicle
shall remain braked.
5.2.9 For vehicles equipped with a device to prevent unauthorized use acting on the
brake locking system, even if the device to prevent unauthorized use fails, the
requirements of GB 12676 or GB 21670 shall be met.
5.2.10 The device to prevent unauthorized use acting on the brake locking system shall
adopt mechanical protection devices without affecting the braking performance of the
vehicle.
5.3 Devices to prevent unauthorized use acting on the shift mechanism
6 Special requirements for electromechanical or electronic
devices to prevent unauthorized use
6.1 Electromechanical or electronic devices to prevent unauthorized use shall be able
to prevent adverse effects such as cyber attacks, cyber threats and vulnerabilities.
6.2 Electromechanical or electronic devices to prevent unauthorized use shall be
designed and manufactured so that failure of the device will not affect the performance
and operational safety of the vehicle.
6.3 While the vehicle is in motion, the electromechanical or electronic device to prevent
unauthorized use shall not enter the locked state, nor shall it affect the performance and
operational safety of the vehicle. If the vehicle has a remote control function, the device
to prevent unauthorized use shall not be controlled while the vehicle is in motion.
7 General requirements for immobilizers
7.1 The immobilizer shall be able to be set and released according to the requirements of 7.2~7.9.
7.2 When the key is in the position that the engine or main drive motor runs, the
immobilizer shall not be able to enter the set state, except in the following cases.
7.3 The immobilizer shall not be permanently in the override state.
7.4 The immobilizer shall be installed on the vehicle so that even if a failure occurs, it
will not affect the performance and operational safety of the vehicle.
7.5 The immobilizer shall be installed on the vehicle in accordance with the
manufacturer's requirements and shall not be damaged or rendered ineffective quickly
and unnoticed (such as by using tools, equipment or devices that are easily available to
the public, low-cost and easy to hide); the immobilizer shall not be easily or quickly
rendered ineffective by replacing major components or assemblies.
7.7 The immobilizer may be combined or integrated with other systems on the vehicle
(such as the engine management system and alarm system).
7.8 The immobilizers shall not restrict the release of vehicle brakes, except for the
immobilizers that restrict the release of pneumatic spring brakes. The immobilizers that
restrict the release of pneumatic spring brakes shall comply with the technical
requirements of GB 12676 or GB 21670, whether in normal or failed state. The
immobilizers that restrict the release of pneumatic spring brakes shall also comply with
the technical requirements of this document.
7.9 The immobilizer shall not be used to brake the vehicle.
7.10 The immobilizer shall be able to prevent the adverse effects of cyber attacks, cyber
threats and vulnerabilities.
8 Special requirements for immobilizers
8.1 Scope of failure
8.1.1 The immobilizer shall prevent the vehicle from moving normally under its own
power by at least one of the following means.
8.1.2 When an immobilizer is installed on a vehicle equipped with a catalytic converter,
it shall not cause unburned fuel to enter the exhaust pipe.
8.2 Operational reliability
The immobilizer shall be able to operate reliably under the special environmental
conditions of the vehicle (see 7.6, Appendix C and Appendix D).
8.3 Operational safety
After the tests in Appendix C and Appendix D are carried out, the immobilizer shall
ensure that its working state (set state/unset state) does not change.
8.4 Set status of immobilizers
8.4.1 The immobilizer shall be able to enter the set state in at least one of the following
ways without additional operation by the driver.
8.4.2 If the immobilizer can enter the set state when the ignition key is in the power
system operating state specified in 7.3, the immobilizer shall also be able to enter the
set state when the driver's door is opened and/or the authorized user consciously
operates it.
8.5 Unset status of immobilizers
The immobilizer shall be released by one of the following methods or a combination
thereof, or other devices with equivalent safety and working effect shall be used.
9 Requirements for additional equipment
9.1 It is permitted to install an audible or visual alarm device on the device to prevent
unauthorized use, or to install an optional and additional device to prevent the vehicle
from being stolen, but the additional device shall be activated by an independent method.
9.2 If the device to prevent unauthorized use is equipped with an acoustic or optical
alarm device, the alarm device shall emit an acoustic or optical signal, of which the
acoustic signal shall last for 25 s~30 s and the optical signal shall last for 25 s~300 s.
The signal shall only start again when the alarm device is activated again.
9.3 If acoustic signals are used, they shall be emitted by an audible alarm device or
other device installed on the vehicle.
9.4 If optical signals are used, they shall be emitted by flashing the vehicle's hazard
warning signals and/or the lights in the passenger compartment (including lights in the
same circuit).
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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