Got a 2012 prius v with 337k and the brake pump actuator is bad,Seatbelt beep won’t stop beepin

Discussion in 'Prius v Main Forum' started by Andycab204, May 14, 2018.

  1. Andycab204

    Andycab204 New Member

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    Got a 2012 prius v 337k it has a bad brake pump actuator been driving like that for a month and yesterday the seatbelt beeper won’t stop beeping while driving and yes wearing the seatbelt plugged in. Any ideas?
     
  2. rjparker

    rjparker Senior Member

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    Probably a bad brake booster and bad contact on the seat belt switch. Did you buy this car with 300k miles? By the way, spend a couple of years back in the late fifties in La Mesa, California on Mariposa including time at Lemon Ave Elementary.
     
  3. bisco

    bisco cookie crumbler

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    congrats and welcome!

    replace the brake actuator, and change the seatbelt setting to off.
     
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  4. Robertto09

    Robertto09 Junior Member

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    The brake actuator is the same of accumulator abs with master cylinder?


    Posted via the PriusChat mobile app.
     
  5. bisco

    bisco cookie crumbler

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  6. Robertto09

    Robertto09 Junior Member

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    The battery is 12.5v. The car shows c1252, c1253 and c 1256 and beep constantly. The techstrem dont erase the codes

    Posted via the PriusChat mobile app.
     
  7. bisco

    bisco cookie crumbler

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    if you have tech stream, it is time to start troubleshooting. log into tech info.toyota.com for the service manual with troubleshooting tree
     
  8. bisco

    bisco cookie crumbler

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    sounds like you might need a brake actuator, but not sure. poly best not to drive it
     
  9. Robertto09

    Robertto09 Junior Member

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    Do you know where is the abs relay location?

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  10. bisco

    bisco cookie crumbler

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    no, you could find it in the on line service manual
     
  11. Robertto09

    Robertto09 Junior Member

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  12. Robertto09

    Robertto09 Junior Member

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  13. ChapmanF

    ChapmanF Senior Member

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    There is a beep alarm in the car to tell you that brake pressure isn't holding up. If you already know there's a pump issue, that's probably the beep you're hearing; "seat belt" is probably a red herring.

    If a v is like a gen 3 liftback, the accumulator and the actuator are not the same part. (In gen 2, they were. In gen 1, they were not. The history is complicated.) Problems like you're seeing can start in either one, so it's worthwhile to get sorry if intimate with the repair manual troubleshooting steps to narrow it down to one or the other before deciding which to replace.

    -Chap
     
  14. Robertto09

    Robertto09 Junior Member

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    The diagnosis was that the brake booster pump with Master cylinder had an internal leak, and it did not send enough pressure, and the code 1391 came out as a fault in the accumulator but in reality the accumulator was good. I am waiting for the spare part to change it, once it is ready I will update the information

    Posted via the PriusChat mobile app.
     
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  15. ChapmanF

    ChapmanF Senior Member

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    I take it you mean the "brake booster with master cylinder" (that's a real part) had the internal leak.

    The "brake booster pump" (just one pesky word extra!) is also a real part, but a different one, also known as the accumulator assembly. That part does not include the master cylinder.

    Did I mention the nomenclature is tricky? :)

    -Chap
     
  16. Robertto09

    Robertto09 Junior Member

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    Hello everybody!! I want to tell you that my Prius is on the road again. As I mentioned earlier, we changed the brake booster with the Master cylinder, we bleed the brakes and the diagnostic codes disappeared. Here in Costa Rica the Toyota wanted to charge me $ 2250 for this part plus labor, however I bought the spare part on Ebay for $ 150 and the labor cost me $ 110. I will definitely have a happy Christmas. Regards!!

    Posted via the PriusChat mobile app.
     
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  17. SFO

    SFO Senior Member

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    Congrats!

    How does your EGR circuit look at 337k :whistle:
     
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