VW TL 934 Wiper Systems - Functional and Material Requirements

VW TL 934 Wiper Systems - Functional and Material Requirements

The “ VW TL 934 Wiper Systems - Functional and Material Requirements” standard, developed by the Volkswagen automotive company , describes the requirements and test methods applied to the following elements of a wiper system:

VW TL 934 Wiper Systems - Functional and Material Requirements

  • Windshield wiper system:
    • Wiper motor with windshield wiper linkage
    • Wiper arm and blade assembly
    • Windshield wiper motor
  • Rear window wiper system:
    • Rear window wiper motor
    • Rear window wiper arm, blade and cover assembly

The processes and systems specified in this standard must be used for numerical and other simulations. The full functional capacity of the entire system of components must be ensured in all vehicle operating conditions, over the entire temperature range from -40°C to +90°C, and under all ambient conditions. All parameters must be within specification after testing. Sections marked with a documentation bar are subject to mandatory documentation. Documentation must be retained for 15 years.

The following basic requirements must be met:

  • Dimensional stability under heat and torsional stiffness, plastic deformation should not (excluding crash test)
  • There should be no traces of collapse or undulation (constant gap contours with adjacent parts)
  • There should be no discoloration (no creaking, rattling, squeaking, crackling, deep buzzing, or similar noise during rest or wiping)
  • There should be no contact with adjacent parts (e.g. A-pillar)
  • It must fit securely to the body (guaranteed without any squeaking or rattling noises)
  • There should be no loosening of parts or fasteners (should not fall below the limits)
  • There must be no breakage in fasteners, carriers, films or assemblies.
  • There should be no separation or paint damage to the decorative material.
  • There should be no clumping or embrittlement of the material.
  • There should be no change on the surface
  • No shrinkage on lids, no leaks
  • There should be no cracks
  • There should be no corrosion
  • There should be no impairment of function

The part must be in perfect condition after testing. The appearance and tactile characteristics of the parts must comply with the component performance specification and Volkswagen quality standards. All general test requirements form the basis of the functional requirements. Among all tests, Volkswagen is responsible for the road tests and endurance road tests, as well as for verifying the functional target specifications. The supplier is responsible for performing all other tests defined in the performance specification and test catalogs.

Project-based deviations from the testing requirement (e.g. country-specific requirements) must be defined in an additional testing catalogue together with the buyer.

Corrosion testing is used to monitor and evaluate the corrosion characteristics of components or corrosion protection solutions when subjected to static loads. This test simulates component loading that might occur in winter road conditions, such as salt air or water containing deicing salts.

The tests required for the windshield wiper system according to the VW 80000 standard are listed in the table titled "Testing according to VW 80000." These requirements apply to the entire operating voltage and temperature range. The functions and test conditions required for each test must be continuously monitored and documented. Furthermore, the test order must be adhered to.

The VW TL 934 standard describes electrical requirements and tests on the following basis:

  • E-01 Long-term overvoltage
  • E-02 Transient overvoltage
  • E-03 Temporary undervoltage
  • E-04 Jump start
  • E-05 Unloading
  • E-06 Surge voltage
  • E-07 Slow decrease and increase of supply voltage
  • E-08 Slow decrease and rapid increase of supply voltage
  • E-09 Reset behavior
  • E-10 Short interruptions
  • E-11 Starting pulses
  • E-12 Voltage curve with smart alternator control
  • E-13 Pin interruption
  • E-14 Connector outage
  • E-15 Reverse polarity
  • E-16 Ground potential difference
  • E-17 Short circuit in signal circuit and load circuits
  • E-18 Insulation resistance
  • E-19 Steady current
  • E-20 Dielectric strength
  • E-21 Feedbacks
  • E-22 Overcurrents

In this standard, mechanical requirements and tests are described on the following basis:

  • M-01 Free fall
  • M-02 Stone impact test
  • M-03 Dust test
  • M-04 Vibration test
  • M-05 Mechanical shock
  • M-06 Mechanical shock resistance test

In this standard, climatic requirements and tests are described on the following basis:

  • K-01 High/low temperature aging
  • K-02 Incremental temperature test
  • K-03 Low temperature operation
  • K-04 Repainting temperature
  • K-05 Thermal shock (component)
  • K-06 Working with salt spray test, outdoor
  • K-07 Working with salt spray test, interior
  • K-08 Moist heat, cyclic
  • K-09 Damp heat, cyclic (with freezing)
  • K-10 Water protection - IPX0 to IPX6K
  • K-11 High pressure cleaning / steam jet cleaning
  • K-12 Thermal shock with splashing water
  • K-13 Thermal shock, immersion
  • K-14 Moist heat, constant
  • Condensation testing with K-15 PCBAs
  • K-16 Thermal shock (without body)
  • K-17 Solar radiation
  • K-18 Harmful gas test

In this standard, chemical requirements and tests are described on the following basis:

  • C-01 Chemical tests

In this standard, service life tests are described on the following basis:

  • L-01 Service life test - mechanical / hydraulic durability test
  • L-02 Service life test - high temperature endurance test
  • L-03 Service life endurance test - temperature cycling test

The VW TL 934 standard is a Volkswagen technical standard that outlines the functional and material requirements for wiper systems used in vehicles. This standard ensures that components such as wiper arms, blades, motors, and linkages meet stringent performance, durability, and environmental criteria.

Our organization, which has been supporting businesses across all sectors for years through a wide range of testing, measurement, analysis, and evaluation activities, has a strong team of employees who closely follow global developments in science and technology and are constantly improving themselves. In this context, we also provide testing services to businesses in accordance with the "VW TL 934 Wiper Systems - Functional and Material Requirements" standard.

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