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Hydraulic brake booster troubleshooting - accumulator failure?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by ZColorado, Feb 28, 2024.

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Feb 28, 2024 at 5:57 AM

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ZColorado [OP] Well-Known Member

Joined:

Nov 6, 2020

Member:

#345998

Messages:

1,143

Gender:

Male

Near Boulder Colorado

Vehicle:

13 DCSB OR 6MT

35's,Kings, NWF, 488, Harrop, SPC, Archive, Method, RCI, C4

I have a '13 TRD-OR with the electronic/hydraulic brake booster.

Symptom: Brakes are extremely touchy, and I run 35s. If I turn key on (engine off), I can hear the brake booster motor run just about every time I push the pedal about 1/2-3/4 of the way down. This lines up with the touchy brake feeling I get while driving.

Question 1: I seem to remember I should be able to push the pedal a couple times before that motor should run, right?

Question 2:Can i simply replace the accumulator? or do I need to replace the entire expensive assembly?

I have techstream - so I can run some tests, but I don't know what to look for.

Here is a link to an ebay page for the accumulator:https://www.ebay.com/p/735889026

Parts diagram:https://partsouq.com/en/catalog/genuine/unit?c=TOYOTA00&ssd=%24%2AKwFKfm9FHxM3Gjo1ExFwdhIGJiE_TkFMTV9wQwsNPio2MjAzdmFNJwkNCTguNyZgfXdKQyo-OzYzPV9BcwNbCl1CWyReDQ1QWkNMAgYMFxhhVBEbEBpdQktSXkdGV1pDXEtPSUxeDQ1aFltEXUxOSk0UH3taBAAJER0-BwNMUFpDXl1OTkpIFh8RVFlcFgxbRFwDf3IqODNdVFlcEUINCVhbOS02S0pJbQJjKj86NDlbUlwDWVBaQ15dSkxHKwMDE1ofFxtaQ15JXAAAAAAsqH3X%24&vid=0&cid=2&uid=345359&q=

Brake booster looks like this:

This site contains affiliate links for which the site may be compensated.

ZColorado, Feb 28, 2024

#1

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