Hard pressing & Holding the brake pedal!..

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by iskoos, Dec 1, 2018.

  1. iskoos

    iskoos Active Member

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    I found out this by a chance the other day. I was at a stop light holding the brake pedal down. I (was bored I guess) and pressed the brake pedal a little harder than usual and kept it like that for a few seconds and a light came up on the dash. It is the Amber color square light on the top left hand corner.
    I removed my foot from the brake pedal and the car didn't move (normally it should have started crawling). Then the traffic light changed to green and I press the gas pedal and continued driving. The amber light went off.

    I tried it again when I got home and what happened is that when you do this (hard pressing & holding the brake pedal while the transmission is on "D"), it holds the brake after you let off the brake. But it did it only for a second or two and then it went off and the car started moving slowly (me without touching the gas pedal).

    I checked this on the owners manual and did some online research. I couldn't find any info.
    Is this a known behavior or something weird happening to my car?
     
  2. Raytheeagle

    Raytheeagle Senior Member

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    It’s the hill start assist feature;).

    Normal behavior (y).
     
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  3. iskoos

    iskoos Active Member

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    It is good to know. I was a bit cautious to experiment it any further without confirming first.
     
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  4. tankyuong

    tankyuong Senior Member

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  5. ChapmanF

    ChapmanF Senior Member

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    Now that you know what it's called, have you checked the Owner's Manual again to figure out how you missed it the first time? Is it just in a different section than you expected?
     
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  6. Mendel Leisk

    Mendel Leisk Underfoot

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  7. The Electric Me

    The Electric Me Go Speed Go!

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    Ah the ol' Hill Keep Assist.
    If you aren't aware of it's existence, then it can scare you.
    But it's totally normal behavior if you have either consciously or unwittingly activated it.
     
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  8. Mendel Leisk

    Mendel Leisk Underfoot

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    We'd had the Prius about a week, someone didn't notice us, tried to merge into us, I tried to lay on the horn, managed to hit the bluetooth phone buttons, started it talking to me. All I needed...
     
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  9. ChapmanF

    ChapmanF Senior Member

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    Rented a car with 4 other undergrad guys to drive from Minneapolis to NYC for spring break. This was back in an age when cars were simpler than today, at least the ones we were used to.

    Alternator flakes out around midnight, somewhere on the Indiana toll road. Car keeps going, with lights dimmer and dimmer, until it doesn't. End up waiting a while in a highway department facility next to a giant salt pile, then getting a lift to a Holiday Inn in Niles, Mich., after the car rental company promises to pick up the tab. Hotel night staff takes our word for it and checks us in to a room. So we get to sleep around, hmm, 5 am, 5:30.

    Phone in the room rings about ten till 7, wakes us all up. Day manager has come in and found out the night staff checked in five college guys with a story about a car rental company going to pay for the room. So we're all marched down to the counter blinking in the light, getting all our IDs photocopied, half expecting to get fingerprinted next, when the phone behind the desk rings. It's the car rental company, saying, hey, if you've got five college guys there from last night, we're paying for the room.

    So we all get handed our IDs back and the hotel gives us a lift to the nearest rental office, twenty minutes back in the wrong direction, and we get shown to our replacement car, some Chrysler thing if I remember right. It's been a weird night, we're on almost 2 hours of sleep, and still wanting to get to NYC, so we pull the car out of the parking space, get mostly across the parking lot and out to the street when this robot voice from nowhere says "ALL MONITORED SYSTEMS ARE FUNCTIONING".

    Just about all jumped out of our seats....

    -Chap

    Edit: "your DOOR is AJAR" wasn't what it said, more of a generic thing to remember cars of that era saying. Thinking more about the story, what it really said came back to me, along with why it was even more surprising, because it wasn't a warning of anything, so it really wasn't even necessary for some robot voice to yell at us about it....
     
    #9 ChapmanF, Dec 1, 2018
    Last edited: Dec 1, 2018
  10. iskoos

    iskoos Active Member

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    You do Not need to if you have Mendel by your side:ROFLMAO:
     
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  11. iskoos

    iskoos Active Member

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    When was this? Just wondering
     
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  12. iskoos

    iskoos Active Member

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  13. ChapmanF

    ChapmanF Senior Member

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    Well, it must have been, right about, then.

    -Chap
     
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  14. Raytheeagle

    Raytheeagle Senior Member

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    Was it a Chrysler LeBaron and did it have a cell phone in it:whistle:?
     
  15. Fubar1764

    Fubar1764 Member

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    I've had my '15 Plug-in for 3 years now. I still can't think of a reason to use the hill-start assist. Living in the a flat coastal area (Houston, Texas), I haven't had occasion to use it. Would anyone mind walking me through how it might be useful? Mind you, I use two pedal driving, so that may obviate the helpfulness of something like hill start assist. . .
     
  16. Grit

    Grit Senior Member

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    you mistakenly made a left turn and now youre in San Francisco. You’re stopped at a red light intersection with car nose pointed up in the air (on a steep grade hill) and there’s a car stopped behind you really close. You have 3 other people in the car and if let go the brake pedal on green, you could roll back into the car behind you if you don’t smash on the accelerator quick enough.
     
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  17. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    I never seem to have any problem with that...... :D
     
  18. Grit

    Grit Senior Member

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    come to sf to experience the steeper grades, you’ll appreciate the hill start
     
  19. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    Nope.
    I have a brother that's doing 20-to life in the Davis area.

    Hard Pass!
     
  20. Fubar1764

    Fubar1764 Member

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    @Grit
    So, I think this assist wouldn't help me since I do two foot driving. But your explanation makes good sense. Thanks!
     
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