SAE J2657-2019

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SURFACE VEHICLE
RECOMMENDED PRACTICE
J2657™
DEC2019
Issued 2004-12
Reaffirmed 2019-12
Superseding J2657 DEC2004
Tire Pressure Monitoring Systems for Light Duty Highway Vehicles
RATIONALE
Committee recommends to reaffirm. Method is relevant and in common use.
Foreword
The field of application of this document is as listed below:
a. Light truck and passenger car tires
b. Tubeless conventional and run-flat tires
Normal tire maintenance procedures must be followed regardless of whether a tire pressure monitoring
system (TPMS) is used or not. Tire pressure adjustments must be performed even in the absence of any
TPMS indication in order to have the optimum tire performance. A TPMS acts only as an aid to the driver
detecting pressure changes during operation.
All trademarks used are owned by their respective owners.
1. Scope
To establish overall performance guidelines, test methods, and minimum performance levels for a TPMS.
The system shall visually indicate the tire inflation pressure status. These guidelines include, but are not
limited to:
a. A test methodology for a device which monitors tire inflation, that is located in/on the tire/wheel
environment.
b. Recommended performance guidelines for a TPMS.
1.1 Rationale
Not Applicable.
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2. References
2.1 Applicable Documents
The following publications form a part of this recommended practice to the extent specified herein.
Unless otherwise specified, the latest issue of SAE publications shall apply.
2.1.1 SAE PUBLICATIONS
Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, www.sae.org
SAE J551/1—Performance Levels and Methods of Measurements of Electromagnetic Radiation from
Vehicles and Devices (60 Hz to 18 GHz)
SAE J1211—Recommended Environmental Practices for Electronic Equipment Design
SAE J1113/1—Electromagnetic Compatibility Measurement Procedures and limits for Components of
Vehicles, Boats (up to 15 m), and Machines (Except Aircraft) (50 Hz to 18 GHz)
SAE J1113/2—Electromagnetic Compatibility Measurement Procedures and Limits for Vehicle
Components (Except Aircraft)—Conducted Immunity, 30 Hz to 250 kHz—All Leads
SAE J1113/3—Conducted Immunity, 250 kHz to 5000 MHz, Direct Injection of Radio Frequency (RF)
Power
SAE J1113/4—Immunity to Radiated Electromagnetic Fields—Bulk Current Injection (BCI) Method
SAE J1113/11—Immunity to Conducted Transients on Power Leads
SAE J1113/12—Electrical Interference by Conduction and Coupling—Coupling Clamp and Chattering
Relay
SAE J1113/13—Electromagnetic Compatibility Measurement Procedure for Vehicle Components—Part
13—Immunity to Electrostatic Discharge
SAE J1113/21—Electromagnetic Compatibility Measurement Procedure for Vehicle Components—Part
21—Immunity to Electromagnetic Fields, 10 kHz to 18 GHz, Absorber-Lined Chamber
SAE J1113/22—Electromagnetic Compatibility Measurement Procedure for Vehicle Components—Part
22—Immunity to Radiated Magnetic Fields from Power Lines
SAE J1113/24—Immunity to Radiated Electromagnetic Fields; 10 kHz to 200 MHz—Crawford TEM Cell
and 10 kHz to 5 GHz—Wideband TEM Cell
SAE J1113/25—Electromagnetic Compatibility Measurement Procedure for Vehicle Components—
Immunity to Radiated Electromagnetic Fields, 10 kHz to 1000 MHz-Tri-Plate Line Method
SAE J1113/26—Electromagnetic Compatibility Measurement Procedure for Vehicle Components—
Immunity to AC Power Line Electric Fields
SAE J1113/27—Electromagnetic Compatibility Measurements Procedure for Vehicle Components—Part
27—Immunity to Radiated Electromagnetic Fields
SAE J1113/42—Electromagnetic Compatibility—Component Test Procedure—Part 42—Conducted
Transient Emissions
SAE J2402—Road Vehicles-Symbols for Controls, Indicators, and Tell-Tales
2.1.2 ASTM PUBLICATIONS
Available from American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken,
PA, 19428-2959, www.astm.org
ASTM B 117—Salt Spray (Fog) Testing
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2.2 Related Publications
The following publications are provided for informational purposes only and are not required as part of
this document. Unless otherwise specified, the latest issue of the publications shall apply.
2.2.1 TIRE AND RIM YEAR BOOK
Available from The TIRE and RIM ASSOCIATION, INC., 175 Montrose West Avenue, Suite 150, Copley,
OH 44321, www.us-tra.org
2.2.2 ETRTO STANDARDS MANUAL
Available from European Tyre and Rim Technical Organization, Secretariat, Avenue Brugmann, 32/2, B.–
1060 Bruxelles, www.agency.be/etrto
2.2.3 JATMA YEAR BOOK
Available from the Japanese Automobile Tire Manufactures Association, Inc., No. 33 Mori Bldg. 8th Floor,
3-8-21 Toranomon, Minato-Ku, Tokyo, Japan 105-0001, www.jatma.or.jp
2.2.4 ISO PUBLICATIONS
Available from ANSI, 25 West 43rd Street, 4th Floor, New York, NY 10036-8002, www.iso.org
ISO 7000—Graphical symbols for use on equipment—Index and synopsis
ISO 2575—Road Vehicles—Symbols for controls, indicators and tell-tales
2.2.5 FEDERAL PUBLICATIONS
Available from Federal Communications Commission, 445 12th Street SW, Washington, DC 20554,
www.fcc.gov
FCC Part 15
Available from the Federal Register, National Highway and Traffic Safety Administration, 400 Seventh
Street, SW, Washington, DC 20590, www.nhtsa.dot.gov
Title 49 Code of Federal Regulations
FMVSS 138—Tire Pressure Monitoring Systems
FMVSS 101 S5.2.3—Controls and Displays
FMVSS 110—Tire Selection and Rims
3. Definitions
3.1 Conventional tire
All pneumatic tires not defined as run-flat.
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3.2 Cold inflation pressure
Tire inflation pressure at the prevailing atmospheric temperature that does not include any tire inflation
pressure build-up due to vehicle operation.
3.3 Functionality
Operation within the parameters as defined by the specification of the device under test.
3.4 Gross vehicle weight rating
The value specified by the vehicle manufacturer as the maximum loaded weight of a single vehicle.
3.5 Lightly loaded
Unloaded vehicle weight plus 180kg, including test driver and instrumentation.
3.6 Run-flat tire
A tire, which is capable of running a certain, limited distance under prescribed conditions in the event of a
complete loss of inflation pressure. A run-flat tire is similar to a conventional tire in that it is inflated to the
cold inflation pressure.
3.7 Test inflation pressure
The tire pressure at which the system is to be activated to indicate a low tire pressure condition on a
vehicle.
3.8 Tire placard
A placard, permanently affixed to the vehicle as required by FMVSS110. The placard displays, among
other information, the vehicle manufacturer's recommended cold tire inflation pressure.
3.9 Tire Pressure Monitoring System
A system that measures the tire inflation pressure or a parameter(s) that adequately correlates to tire
inflation pressure.
3.10 Symbols and Abbreviations
DUT—Device Under Test
EMC—Electromagnetic Compatibility
IRI—International Roughness Index
p-p—Peak–to-peak
RF—Radio Frequency
TPMS—Tire Pressure Monitoring System
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