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Question: What is a common cause of premature ABS brake application?

2018-08-27

Answer: Premature ABS applications are mostly caused by speed sensor issues. Rust build up under the speed sensors is one common cause as seen on General Motors light-duty trucks. The speed sensor output voltage drops as it moves away from the tone wheel and is interpreted as a slipping wheel. Then as it moves a little further, an ABS variable voltage speed sensor code can be set.

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