Quote:
Originally Posted by Isaac Zachary
Interesting.
However, the guy making the video does mention that this method is "not as good" as using the scan tool.
It might get the fluid through all the ABS pump parts, but what about the parts that hold back fluid during regen?
|
"Best" is to use a diagnostic / service tool to activate all the circuits to fully flush out the old brake fluid.
"Good Enough" is to manually bleed the brakes and replace 95% or so of the brake fluid. If you really want to get that last bit then after you bleed and replace the fluid then head out and do some full-on emergency stops to cycle the ABS to cycle new fluid through the ABS module. Then you can bleed the brakes again.
Personally, I do the manual bleed / replacement and then cycle the ABS and call it good. You will always have some residual brake fluid in the circuit unless you bleed / replace multiple times.
The purpose of replacing the brake fluid is two-fold.
A. Brake fluid absorbs water of time and that moisture can cause corrosion and can also boil at high temps and cause brake failure.
B. Old brake fluid will gum up the ABS module - especially for those that never activate the ABS and cycle fresh fluid through. The more complicated the ABS / stability control system the more important it is to replace the brake fluid as recommended in the service manual.