Let’s try again!

Discussion in 'Newbie Forum' started by Forde002, Jan 20, 2018.

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  1. Forde002

    Forde002 New Member

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    Hello all!
    This is my first Prius and it is a 2007! We are learning how to fix it as we go. I recently have started having problems with the brakes. The back passenger brake is not engaging. All types of brake lights are on and will not go off. We took it apart and when we push on the brake pedal, there is. I pressure in the line and it spins freely. We have checked the codes and there is nothing relating to the brakes. We are in need of ideas on what is wrong with it. We are trying to do the work ourselves and save the money! Thank you in advance for the help!
     
  2. bisco

    bisco cookie crumbler

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    how many miles on her?
     
  3. Forde002

    Forde002 New Member

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    She is close to 260,000
     
  4. bisco

    bisco cookie crumbler

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    nice, i guess you can expect brake issues by then. when lights are on, there are codes. are you using tech stream to read them?
     
  5. bisco

    bisco cookie crumbler

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    could just be frozen, but before you take anything apart, always disconnect the 12 volt battery.
     
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  6. Robbski

    Robbski Junior Member

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    How did you determine that the one brake was not working? My understanding (which is somewhat limited) is that the actual mechanichal braking only happens when the Prius is traveling very slowly.

    That question aside, based on what you have written I'd take a close look at the wheel cylinder.

    I DIYed the rear brakes on my newly acquired 240k mile, '05 a few months ago. I bought the car from a relative for short money because the brakes were in such terrible condition and raising a huge racket.

    I ended up changing both rear brake wheel cylinders as a visual inspection revealed the seals were shot and leaking. I did the rears about 2 weeks after doing the fronts. Before I did the rears I thought the car stopped pretty well but I only drove it about 100 miles or so with no hard stops.

    So I did the rears, changing the shoes, drums, hardware, springs and wheel cylinders. Then I went to a dealer to have the brakes bled. This was essential after removing the wheel cylinders which, of course, opens the brake lines.

    (I suggest that if you do this that you use liberal amounts of PB blaster and turn the cylinder itself while holding the brake line nut rather than turning the brake line nut which will likely collapse the brake line.)

    The other possibility I would check is air in the brake lines. If the wheel cylinders are leaking air could be getting in. Is the fluid resevoir full? Has the system been bled? My understanding of the Prius braking system is that the computerized braking can mask air in the line. Peddle might feel OK but localized air pockets might exist. You'll need to go to a specialist or dealer to get the brakes bled.
     
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