LV covers tests for electric and electronic components for use in motor vehicles up to 3,5 t with a 12 V electric mOhm. Tolerances & standard values. LV Automotive test standard bij Hielkema Testequipment. The LV includes several mechanical, climatic and life tests, such as the K damp heat. ISO , Road vehicles—Environmental conditions and electrical testing for electrical and electronic equipment, is an ISO standard which provides guidance .

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Deviations from the LV are listed on the cover sheet of this standard. If ztandard to individual test sections become necessary in individual cases, these must be agreed upon separately between the responsible specialized department and the relevant manufacturer.

Acceptance of the test reports does not automatically result in a release. Previous issues VW This electronically generated standard is authentic and valid without signature. The English translation is believed to be accurate. In case of discrepancies the German version shall govern. Page 1 of 1. Jens Luhmann Uwe Girgsdies Tel.: No part of this document may be transmitted or reproduced without prior permission of a Standards Department of the Volkswagen Group. Parties to a contract can only obtain this standard via the B2B supplier platform www.

Additional or deviating requirements, test conditions and tests must be defined in the respective Component Performance Specifications. The represented tests do not serve for component qualification or a qualification of the manufacturing process.

Abbreviations for voltages and currents 2. Other definitions Ri Terminal designations f Internal resistance of the voltage source Acc. Tolerances of envelopes must always be considered unilaterally as, otherwise, the requirement is mitigated. Tolerances refer shandard the required measured value. All measured values with all maximum values peaks must be recorded.

It must be ensured that occurring voltage peaks do not lead to an overflow or cannot be measured in the case of an insufficient resolution. Operating voltage ranges Enco ding UBmin UBmax a 6V 16 V b 8V 16 V Description For functions that must retain their performance during starting of the engine For functions that do not have to retain their performance during starting of the engine Note: This encoding must only be used if the component cannot staneard classified in the encoding a, c or d.

For functions that must retain their performance when the engine is not running For functions that must retain their performance when the engine is running c d 9V 16 V 9,8 V 16 V Test voltages, especially for over- and undervoltage tests may deviate significantly from the voltage ranges mentioned above and will be specified individually.

Functional status A must always be fulfilled within the voltage range applicable for the component. The functional status of the DUT is to be specified for each test. Additional requirements must be defined and documented in the Component Performance Specifications. Memory functions must always remain in functional status A.


The integrity not up-to-dateness of the non-volatile memories must be ensured at any time. The time sequences of the functional statuses must be specified in the Component Performance Specifications. Permissible event log entries must stsndard coordinated with the purchaser and must be stipulated. The functional status A must also be achieved in the case of deviations of the designed performance function limitation at high and low temperatures when the operating voltage is fallen below or exceeded, if this is described in the Component Performance Specifications as permissible derating.

After the exposure to the test parameters, the DUT must fulfill all functions as specified. Lv1224 functions are not permitted. The device under test DUT must comply with the requirements for nonflammability acc.

LV Test equipment at SIBO Electronic

Details concerning the operating modes, operating loads e. The DUT must be operated in a way that minimal self-heating occurs e. The DUT must be operated in a way that maximum self-heating occurs e. Sample operating modes Operating mode II. Follow-on current stopped T. Anti-theft alarm No operation system when vehicle is running. Brake control system Component as in parked vehicle.

Sample component Operating mode II. Vehicle interior is monitored while vehicle is parked. Stadnard without brake Driving with frequent actuation. Prior to testing and after each test, it must be checked whether these parameters meet the specifications.

The basic functionalities of the components must be measured and documented in the test report. For components with event log, the event log must be monitored continuously and the entries must be documented. The data resulting from the continuous parameter monitoring must be examined for trends and drifting to detect irregularities, dtandard or standdard of the component.

X-ray examinations and metallographic examinations of the assembly and joining technology must be coordinated between purchaser and contractor.

Xtandard description serves as a basis for the evaluation of the test results and, thus, must be available in detail.

All test equipment used for measuring must be calibrated acc. The test equipment, setups and test methods used must be documented in Notes on Procedure.

LV-124/ LV-148 tests with the eTS one

The purchaser reserves the right to check the laboratories and the laboratory procedures. Test selection table Test Applicable to Additional specifications E Long-term overvoltage E Transient overvoltage E Transient undervoltage E Jump start E Load dump E Superimposed alternating voltage Components supplied via the 12V electric system Components supplied via the 12V electric system Components supplied via the 12V electric system Components supplied via the 12V electric system Components supplied via the 12V electric system Components supplied via the 12V electric system – for devices directly connected to battery plus: A generator control fault during driving operation is simulated.

A distinction is made between: Functional status B If required, an emergency mode must be defined. The corresponding derating strategy must be described in the Component Performance Specifications.

These overvoltages are simulated by means of this test. This test may be used for the electrical life test. Short test 3x test pulse within 10 s 2. Endurance test 1 x test pulse at intervals of 9 s Both tests are carried out in succession. At least 6 Figure 1: Test pulse E Transient overvoltage 4.


These undervoltages are standadr by means of this test. Test pulse E Transient undervoltage 4. Lv24 maximum test voltage results from commercial vehicle systems and their increased power supply voltage.

Test pulse E Jump start 4. Functional status B The sensors must deliver valid values over the whole time or safeguarded by means of replacement tables in the components. This pulse is simulated by means of this test. Test pulse E Load dump 4. In addition, the event log of the component must be read out. The superimposed alternating voltage may be applied during the entire running time of the engine. This situation is simulated by means of this test. For high-power loads, a linear decrease of the peak-to-peak voltage starting with a defined frequency must be provided in the Component Performance Specifications.

Test pulse E Superimposed alternating voltage 4. Event log entries are not permitted.

At least 6 Figure 7: Test pulse E Slow decrease, quick increase of the supply voltage 4. A distinction is made between the ranges: Functional status A b Outside of the defined operating voltage of the component: Test boundary conditions e.

The reset behavior is represented by a voltage variance and a time variance. Two different test sequences are required to simulate different switch-off times. A component must always undergo both sequences. U1 UBmin to 6 V? Undefined operating statuses must not occur under any circumstances.

It must be verified and documented that the specified threshold as of which voltage level the component leaves functional status A for the first time is complied with. Test parameters E Short interruptions The component’s behavior at short interruptions of different durations is simulated. The following sequence must be complied with for this purpose: The artificial vehicle network must be coordinated with the engineering department.

This results in a diagram as shown in Figure 9. Test pulses E Short interruptions Figure Schematic circuit E Short interruptions 4. The test is passed if the DUT achieves functional status A in the range up to ? A deviating value for the permissibility of functional status C must be defined in the Component Performance Specifications. Most components are activated directly before starting for a short period, then deactivated during starting and activated again after starting when the engine is running.

This test serves to verify normal operation under these conditions. The starting process may be performed under different vehicle starting conditions, cold start and warm start. In order to cover both cases, two different test sequences are required.