A current truck or trailer ABS system is required to have FMVSS 121 redundancy.What does redundancy mean in this context?
A) superfluous
B) shuts down if a failure occurs
C) ability to apply brakes immediately when a system fault is detected
D) revert to full pneumatic circuit control in the event of ABS electronic failure

Question

Quizplus · Accepted Answer

Redundancy in the context of FMVSS 121 for truck or trailer ABS systems means that the system is designed to revert to full pneumatic circuit control if there is an electronic failure in the ABS, ensuring that basic braking functionality is maintained.

A Current Truck or Trailer ABS System Is Required to Have