Title: Perform an ABS operational system self-test (chuff test).
Course: Diesel Equipment Technology I (20107-I) > Section: Preventive Maintenance and Inspection: Servicing Air Brakes

Performance should include inspecting and testing, based on

- DOT guidelines
- the description of normal operation.

Process/Skill Questions:

- What may cause the ABS not to perform a system self-test?
- What should be done when the vehicle fails an operational self-test?