sae j2174标准 

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Copyright 2002 Society of Automotive Engineers, Inc.All rights reserved.

Printed in U.S.A.

SAE J2174 Revised FEB2002

2.2.2

TMC PUBLICATION—Available from American Trucking Associations, 2200 Mill Road, Alexandria, VA 22314.TMC RP 110—Low Tension Cable for Heavy Duty Truck-Trailer Wiring Systems (sizing and color only)TMC RP 114 – Wiring Harness Protection

TMC RP 137 – Antilock Electrical Supply from Tractors through the SAE J560 Seven Pin ConnectorTMC RP 141—Trailer ABS Power Supply Requirements

2.2.3

TTMA PUBLICATION—Available from Truck Trailer Manufacturers Association, 1020 Princess Street,Alexandria, VA 22314.

TTMA RP97-97 – Trailer Antilock Braking System Wiring

TTMA RP111 – Electrical System Maintenance and Repair for Trailers Without Sealed Wiring Harness

Systems

TTMA RP119 – Electrical Interface for Truck-Trailer InterconnectionDesign and Installation of Lighting Systems for Trailers

2.2.4

MILITARY SPECIFICATION—Available from Global Engineering Documents, 15 Inverness Way East,Englewood, CO 80112-5704.

MIL-STD-1344A—Test Methods for Electrical Connectors

3.3.1

Definitions

Connector—A coupling device which provides an electrical and mechanical junction between twomulticonductor cables, or between a cable and an electrical component.

Terminal—A device attached to a wire or cable to provide the electrical interface between two cables or acable and an electrical component.

Dolly—A chassis equipped with one or more axles, a fifth wheel and/or equivalent mechanism, and drawbar,the attachment of which converts a semitrailer to a full trailer.

Electrical Distribution System—The electrical wiring system includes all cables and wiring, connectors andterminations, coverings, seals, any other incorporated items to maintain the integrity and performance of theelectrical system, and the connector to any mating device with the exception of the SAE J560 connector whereonly the electrical performance requirements apply. The electrical wiring system does not include thefunctional devices to which the wiring system is attached such as lamps, ABS electronic control modules orsensors.

Sealed—A condition which provides a nonleaking union between two mechanical components or any placewithin an electrical distribution system. A sealed union is defined as one which does not allow the ingress ofmoisture.

3.2

3.3

3.4

3.5

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SAE J2174 Revised FEB2002

4.4.1

Tests

Test Procedures—Conformance to the requirements of this document shall be determined by subjecting eachdevice to each test procedure listed in this document. Unless otherwise stated, the tests are to be performedat 25 °C ± 5 °C and at 12.5 V DC ± 0.1 V DC or per the manufacturers recommendations. Sample sizes shallbe statistically valid. The tests shall be conducted in the sequence as follows:

4.1.1Voltage Drop

4.1.2Connector Durability4.1.3 Salt Fog

4.1.4Thermal Cycle4.1.5Thermal Shock4.1.6Oil Absorption

4.1.7Salt Water Immersion4.1.8 Spray Wash4.1.9Vibration

4.1.10Insulation Resistance - Multiconductor Assemblies4.1.11Tensile Strength - Wire to Terminal4.1.12 Tensile Strength – Wire to Wire4.1.13 Connector Pull Force

4.1.14 Connector Misengagement Force4.1.15 Connector Terminal Retention Force

4.1.1

VOLTAGE DROP—The measurement of connection voltage drop shall be per SAE J163 and Figures 1 and 2.The voltage drop of the cables shall be subtracted from the measured values. Except for connectors specifiedby SAE J560, the voltage drop shall be measured at the current specified in Table 1 of this document.

FIGURE 1—CABLE TO CABLE ASSEMBLY

FIGURE 2—CABLE TO COMPONENT ASSEMBLY

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SAE J2174 Revised FEB2002

4.1.2

CONNECTOR DURABILITYa.b.

4.1.3

An assembled connector with terminals shall be mated and unmated 25 times.

Using the procedure described in 4.1.1, measure the millivolt drop of the mated terminal pair.

SALT FOG—Testing shall be performed per ASTM B 117-73 test method for 96 h. During the test, each circuitshall be operating at the test currents specified in Table 1.

THERMAL CYCLE—Connector and cable assemblies shall be connected to their mating parts. Theassemblies shall be exposed to 25 cycles of the thermal cycle profile shown in Figure 3. The assembliesshall be energized with test voltage commencing at point “A” of Figure 3 and de-energized at point “B” ofeach cycle. The current shall be limited to 1.0 A.

4.1.4

FIGURE 3—THERMAL CYCLE PROFILE

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SAE J2174 Revised FEB2002

4.1.5

THERMAL SHOCK—The cable to cable or cable to component connector assemblies shall be subjected to10cycles of thermal shock. One cycle shall consist of 30 min at a temperature of –40 °C ± 2 °C followed by30 min at a temperature of 80 °C ± 2 °C with a transfer time of 2 min maximum.

OIL ABSORPTION—Connectors shall be capped prior to testing to prevent entry of oil into the connectorcavities during the test. The wiring assembly shall be immersed in ASTM D 471, IRM-902 engine oil at 50 °C± 3 °C for a period of 20 h. After removal from the engine oil, remove excess oil from the surface and allowsufficient time for excess oil trapped in the assembly to drain completely.SALT WATER IMMERSIONCable to Cable Assemblya.b.c.d.e.

4.1.7.2

Immerse the assembly at a minimum depth of 300 mm in a 5% solution of salt (sodium chloride) water.Extend the cable ends out of the solution.

Connect the assembly to a source set at test voltage. The current flowing shall be a minimum of 1.0 A.Energize the assembly for 30 min each hour.Terminate test after 60 h.

4.1.6

4.1.74.1.7.1

Cable to Component Assemblya.b.c.d.e.

Immerse the assembly at a minimum depth of 300 mm in a 5% solution of salt (sodium chloride) water.Extend the ends of the cable assembly out of the solution.

Connect the assembly to a source set at component rated voltage or test voltage.Energize the assembly for 30 min each hour.Terminate test after 60 h.

4.1.8

SPRAY WASH—Conduct testing per SAE J1455. The addition of detergents or other additives to the water isrecommended. The sample should be oriented in an as installed condition, simulating normal operatingconditions.VIBRATION

Applicability—It is difficult to subject a complete trailer wiring system to a vibration test due to its size. Toaccomplish a meaningful test, individual sections need to be tested alone or along with other sections.Each connector system as well as each mounting support location must be tested. Unsupported sectionsrouted around tight corners or passing through cutouts should also be tested.

Test Set Up—The section of wiring under test shall be attached to the shaker table simulating the actualinstallation. The remainder of the wiring shall be free and unsupported for a minimum of one verticalmeter, draped off the test table. If the section under test may accumulate ice during actual usage, a 2 kgweight shall be added to the free wiring, one half meter below the surface of the shaker table.

Test Method—Alternative test methods, 4.1.9.3.1 or 4.1.9.3.2, may be applied depending upon availabilityof equipment. Method 4.1.9.3.1 is recommended.

With 100 mA flowing through the circuits under test during the last thirty minutes of the test, monitor eachcircuit for discontinuities.

Measure millivolt drop at the termination of the test using the procedure described in 4.1.1.

4.1.94.1.9.1

4.1.9.2

4.1.9.3

4.1.9.3.1Vibration testing shall be performed by the procedure described in SAE J2139.

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