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A New Way of Trouble Shooting the Wire Harness - From Drawing Board to Service Rack
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English
Abstract
Failures in automobile cable harnesses account for at least 30%of all automotive electronics failures, and contribute over 50% of the electronic control modules (ECUs) returned to the factory and marked “no trouble found.”
This paper discusses the use of Wave Signature Analysis (WSA) and Time Domain Reflectometry (TDR)1 to detect actual and potential failures in cable harnesses. “Failures” here include not only the normal faults of the harness, connectors, sensors, and actuators, but also the loading effects and variability of wires that induce failures in ECUs. The technique can be employed throughout the cycle of harness life -- design and characterization, production testing, and diagnosis in the service bay.
Solving these interconnect problems in the automobile will result in faster prototype development, better assembly line testing, and more accurate service diagnosis. The technology can either be employed as a stand-alone system or incorporated directly into the ECU module.
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Authors
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Citation
Anderson, D., "A New Way of Trouble Shooting the Wire Harness - From Drawing Board to Service Rack," SAE Technical Paper 960394, 1996, https://doi.org/10.4271/960394.Also In
References
- “TDR Fundamentals,” April 1988 Hewlett-Packard Co., Literature Distribution Center
- Seiffert, Ulrich Walzer, Peter “Automotive Technology of the Future,” Society of Automotive Engineers, Inc. 400 Commonwealth Drive, Warrendale PA 15096-0001 ISBN 1-56091-080-1 1991
- Understanding Automotive Electronics 4th Ribbens, William B. Ph. D. Society of Automotive Engineers, Inc. 400 Commonwealth Drive, Warrendale PA 15096-0001 ISBN 0672-2735806