Technician A says the metering valve delays full application of the front disc brakes until the rear brake shoes are applied. Technician B says the power booster uses pressure generated by the engine. Who is correct?

Question

Quizplus · Accepted Answer

Technician A is correct. The metering valve is responsible for delaying the full application of the front disc brakes until the rear brake shoes are applied, to prevent the front brakes from locking up. Technician B is incorrect, as the power booster does not use pressure generated by the engine. Instead, it uses vacuum pressure created by the engine to assist with pedal force.

Technician a Says the Metering Valve Delays Full Application of the Front