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Odd behaviour

Discussion in 'Gen 2 Prius Main Forum' started by Has Raf, Oct 3, 2024 at 3:44 PM.

  1. Has Raf

    Has Raf Junior Member

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    I was having an issue with my car. As I would come to a stop, just before, as I was slowing down, the car would jerk and jolt forwards. It’d be worse the faster I was going, and the harsher I’d be braking. (I try to brake slowly and gradually of course, not harshly). It would feel like I was being hit from behind the car. Thankfully, this has now subsided, but I now have the yellow VSC, ABS and (!) on my dash… I’ve ordered a Autel, but hasn’t arrived yet, so can’t read error codes at the moment. Help please!

    upload_2024-10-3_20-42-50.jpeg
     
    #1 Has Raf, Oct 3, 2024 at 3:44 PM
  2. ChapmanF

    ChapmanF Senior Member

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    #2 ChapmanF, Oct 3, 2024 at 3:57 PM
  3. Has Raf

    Has Raf Junior Member

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    Thank you. This seems awfully complex and time consuming for me. I’ll wait for my Autel. I wasn’t really asking about the error codes. In more curious about the odd behaviour.
     
    #3 Has Raf, Oct 3, 2024 at 4:07 PM
  4. pasadena_commut

    pasadena_commut Senior Member

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    Looks like the car is doing its best to tell you: problem with the braking system.
     
    #4 pasadena_commut, Oct 3, 2024 at 4:21 PM
  5. ChapmanF

    ChapmanF Senior Member

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    It even wants to tell you what problem with the braking system, but you have to ask it.
     
    #5 ChapmanF, Oct 3, 2024 at 6:12 PM
  6. Has Raf

    Has Raf Junior Member

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    Again, this post wasn’t so much about the error codes. What about the physical issue, which has now resolved, but error codes instead?
     
    #6 Has Raf, Oct 4, 2024 at 12:08 AM
  7. rjparker

    rjparker Tu Humilde Sirviente

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    Your car is brake by wire meaning a computer is opening and closing valves in the master cylinder to allow a hydraulic pump and accumulator to pressurize the brake calipers. In most cases regenerative braking where the wheels are driving a generator do most of the braking. So your system was failing at the time.
     
    #7 rjparker, Oct 4, 2024 at 12:27 AM
  8. Has Raf

    Has Raf Junior Member

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    But, at the time the car was malfunctioning, there were no warnings on the dash. Now, the car is not malfunctioning when braking, but error cars are displayed as above. Odd?
     
    #8 Has Raf, Oct 4, 2024 at 2:43 AM
  9. rjparker

    rjparker Tu Humilde Sirviente

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    Many failures require multiple trips to code.
     
    #9 rjparker, Oct 4, 2024 at 7:30 AM
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