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International Automotive Technicians Network
Re: Why replace both of these parts? (Prius, C1391)
Posted to Technical Discussion Forum on 8/1/2025

I made a pressure tester out of some brake line and a ball valve so that I could pressure the master cylinder assembly and watch the scan tool to see bleed off when I close the ball valve and isolate the master cylinder. On the scan tool 150 psi is about .69vo... Login to read more.