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2008 Hihy with c1391 error code.
So my highlander has the dreaded accumulator pressure low, internal leak code. I'm sorta of puzzled what part that needs to be replaced. Is it the block actuator thing or the pump / accumulator? I have access to Techstream and would like to fix this problem on the cheap.
I don't wan't to throw a 800 dollar part at the issue just to find out i need to spend 1000 more. I hear that it could be the pump or the actuator assembly. I read about the active brake test in TechStream but don't fully understand what exactly i am looking at/for. Can some one explain the troubleshooting process that i go though in the Tech stream software?
I really cant afford to spend 3k to get this issue fixed right now, but i can afford some used parts and a bit of tinkering.