How should a rerouted vacuum hose that bypasses a thermal vacuum switch valve be documented in VIS?

A rerouted vacuum hose that bypasses a thermal vacuum switch valve should be documented as "Modified" in the Vehicle Inspection System (VIS) because the alteration involves changing the original configuration of the vacuum system. This modification indicates that the vehicle's emissions control system has been altered from its factory-approved design, which may impact overall emissions performance and compliance with regulations.

Documenting it as "Modified" ensures that the inspection record accurately reflects the current state of the vehicle, making it clear that changes have been made that could affect the vehicle's operation and emissions. Proper documentation is crucial for regulatory compliance and for providing accurate information for future inspections or repairs.

Other options like "Functional," "Repaired," or "Missing" would not accurately capture the nature of the alteration, as the hose is still present but has been changed in a way that affects how it functions within the vacuum system. Recognizing and documenting modifications helps ensure transparency and accountability in vehicle emissions control practices.