Hill start assist is kinda cool

Discussion in 'Gen 3 Prius Main Forum' started by randallintacoma, Apr 4, 2010.

Page 1 of 3
  1. randallintacoma

    randallintacoma New Member

    Joined:
    Mar 10, 2010
    33
    1
    0
    Location:
    Tacoma
    Vehicle:
    2010 Prius
    Model:
    IV
    I know there have been other threads about the hill start assist feature on the Prius, but those seem to be asking questions like can you use it in reverse and other issues. I didn't see a thread on just how cool this feature is.

    I have need to drive in downtown Tacoma and downtown Seattle a lot. Both are hilly places- particularly Seattle- and holding your car in place during a red light and during the extremely lengthy time that pedestrians in Seattle take to cross the street can be a challenge. My Camry Hybrid did not have this feature and I always hated the gas and brake juggle, it just seemed like it had to be hard on the car. I finally found myself doing what I could to traverse the hills rather than climb them just to minimize hill side holds.

    Now here comes my Prius with another feature I didn't know it had. Hill start assist is intuitive to use and works very well. Toyota warns in the manual not to become too dependent on it or use it on icy hills, but I am sure that was written by the lawyers. Common sense would tell you that stopping on an icy hill would take more than hill start assist can give.

    I have owned my Prius for a month now and I love that I am still finding pleasant surprises. Is hill start assist a new Prius feature or has it been around a while?
     
    #1 randallintacoma, Apr 4, 2010
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    94,734
    42,963
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    it's not on my 08, so it must be new on genIII. can you expound a bit? i have no trouble holding my prius or hycam on hills. sounds like my old manual tranny!:cool:
     
    #2 bisco, Apr 4, 2010
  3. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    42,767
    14,252
    41
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    It's a new feature first introduced in the Toyota lineup in the 4Runner back in 2004. It has since expanded to most new models. It's mostly a convenience feature so that you don't have to do the brake/accelerator juggle (or use the handbrake/footbrake).
     
    #3 Tideland Prius, Apr 4, 2010
  4. hsiaolc

    hsiaolc New Member

    Joined:
    Nov 30, 2009
    617
    46
    9
    Location:
    UK
    Vehicle:
    2010 Prius
    Model:
    N/A
    It is a very cool and handy feature. I used it a lot when at traffic on a very steep hill and gives me a very big confidence of the car not rolling backwards.

    Very neat and nice feature. It comes with all Gen3 Prius.
     
    #4 hsiaolc, Apr 5, 2010
  5. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    15,320
    8,616
    90
    Location:
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
    This feature was on a manual transmission Subaru that my wife test-drove two decades ago, and it wasn't new then. It is missing from later and larger MT Subarus, such as my '97, but is present on recent AT Outbacks that I've driven for events.

    I haven't used this feature on my Prius. Having gone MT-only a quarter century ago, until joining the HSD world, hill starts on cars that easily roll back are now deeply ingrained in the reflexes. Even in the hilly portions of Seattle.
     
    #5 fuzzy1, Apr 5, 2010
  6. vday

    vday Member

    Joined:
    Feb 19, 2010
    312
    21
    0
    Location:
    Israel
    Vehicle:
    2010 Prius
    Model:
    N/A
    Can someone remind me how this is done?
     
    #6 vday, Apr 5, 2010
  7. spiderman

    spiderman wretched

    Joined:
    Jul 5, 2009
    7,543
    1,540
    0
    Location:
    Alaska
    Vehicle:
    2010 Prius
    Model:
    II
    Press the brake pedal very firmly until it beeps and the indicator lights up. Remove foot from brake pedal and place on accelerator pedal. About 2 seconds later you will here another beep and the brakes are released.
     
    #7 spiderman, Apr 5, 2010
    1 person likes this.
  8. Retsyn

    Retsyn New Member

    Joined:
    Feb 4, 2010
    16
    4
    0
    Location:
    New Hampshire
    Vehicle:
    2010 Prius
    Model:
    IV
    Forester has had it on the MT since 2004. I think the legacy got it 2006-ish. It's fully integrated (you don't need to mash the brake or anything). If you're stopped on a hill and you engage the clutch, it will hold till you move forward. Very well done actually.
     
    #8 Retsyn, Apr 5, 2010
  9. randallintacoma

    randallintacoma New Member

    Joined:
    Mar 10, 2010
    33
    1
    0
    Location:
    Tacoma
    Vehicle:
    2010 Prius
    Model:
    IV
    Page 243 of the owners manual for specifics, but after the car is stopped, press further on the brake pedal until there is a beep and an indicator starts flashing on the instrumental panel. When you remove your foot from the brake, the brakes will remain engaged for 2 seconds, giving you plenty of time to move your foot to the gas pedal.
     
    #9 randallintacoma, Apr 5, 2010
  10. qbee42

    qbee42 My other car is a boat

    Joined:
    Mar 2, 2006
    18,058
    3,052
    7
    Location:
    Northern Michigan
    Vehicle:
    2006 Prius
    It is fully integrated on the Prius as well, but the Prius has no clutch. The system needs some way to know when to use it, hence the brake press activation.

    Tom
     
    #10 qbee42, Apr 5, 2010
  11. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    15,320
    8,616
    90
    Location:
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
    I thought this was how the AT Outbacks handled it too.
     
    #11 fuzzy1, Apr 5, 2010
  12. jburns

    jburns Senior Senior Member

    Joined:
    Oct 13, 2005
    829
    111
    0
    Location:
    Archdale, NC
    Vehicle:
    2010 Prius
    Model:
    III
    Not sure what you are saying here. What would hill start assist have to do with stopping, icy or not?
     
    #12 jburns, Apr 5, 2010
  13. qbee42

    qbee42 My other car is a boat

    Joined:
    Mar 2, 2006
    18,058
    3,052
    7
    Location:
    Northern Michigan
    Vehicle:
    2006 Prius
    Could be. I owned a manual Subaru, but have never driven one with an AT.

    Tom
     
    #13 qbee42, Apr 5, 2010
  14. randallintacoma

    randallintacoma New Member

    Joined:
    Mar 10, 2010
    33
    1
    0
    Location:
    Tacoma
    Vehicle:
    2010 Prius
    Model:
    IV

    Just repeating the users manual warning that "hill start assist may not operate effectively...on roads covered with ice" and then adding my own words that I would hope common sense would tell a driver that more care was needed in that circumstance. Sorry if that wasn't clear.
     
    #14 randallintacoma, Apr 6, 2010
  15. vday

    vday Member

    Joined:
    Feb 19, 2010
    312
    21
    0
    Location:
    Israel
    Vehicle:
    2010 Prius
    Model:
    N/A
    I tried it and it works nicely even though I really don't need it too often
    Thanks for the assistance.
    Danny
     
    #15 vday, Apr 6, 2010
  16. hobbit

    hobbit Senior Member

    Joined:
    Mar 23, 2005
    4,089
    459
    0
    Location:
    Bahstahn
    Vehicle:
    2004 Prius
    Model:
    N/A
    The second-gen has it too, but not as any specifically-triggered
    mode. It simply didn't allow the main motor to turn backwards
    other than very very slowly when the car is in "D". No funny
    games with the brake pedal needed. Makes much more sense than
    the way they did it in the genIII, and a lot of you newer 2010+
    owners will probably never experience it being done the right way.
    .
    _H*
     
    #16 hobbit, Apr 6, 2010
    1 person likes this.
  17. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    42,767
    14,252
    41
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    Err what? The Gen 2 doesn't have HSA. I know, because I tried it on the 2005 when it was new because I thought it had it (The marketing material said it did) but it doesn't. What the marketing material meant to say (and what you're saying) is that the motor has a built-in creep function to mimic and automatic transmission.

    HSA in the common sense/knowledge is the use of computers to hold the brakes for 0.8-2 seconds (depending on manufacturer) to allow time for the driver to move the foot from the brake pedal to the accelerator.

    My smart's HSA is fully automatic (I don't have to fully depress the brake pedal like I do on Toyotas).
     
    #17 Tideland Prius, Apr 6, 2010
  18. Radiant

    Radiant New Member

    Joined:
    Nov 18, 2009
    148
    17
    0
    Location:
    NE
    Vehicle:
    2010 Prius
    Model:
    II
    I like HSA. It really helps on the hills, having driven many a car that rolls back on the hills, I really appreaciate the feature.
     
    #18 Radiant, Apr 6, 2010
  19. qbee42

    qbee42 My other car is a boat

    Joined:
    Mar 2, 2006
    18,058
    3,052
    7
    Location:
    Northern Michigan
    Vehicle:
    2006 Prius
    The Gen II has a hill holder. It's not the same hill holder as on the Gen III, but an extension of the automatic creep that you describe. Just as hobbit stated, the Gen II uses the creep to keep the car from rolling backward downhill, or at least limits the speed of the backward roll. It's more aggressive than the normal creep feature, so some sort of feedback is being used to regulate the amount of holding power on a hill.

    Tom
     
    #19 qbee42, Apr 6, 2010
  20. Tideland Prius

    Tideland Prius Moderator of the North
    Staff Member

    Joined:
    Oct 2, 2004
    42,767
    14,252
    41
    Location:
    Canada
    Vehicle:
    2018 Prius Prime
    Model:
    Technology
    Well I'm not willing to debate on the technicalities :D. It's just that to me, a hill start assist system is one that holds the brakes regardless of manufacturer.
     
    #20 Tideland Prius, Apr 6, 2010
(You must log in or sign up to post here.)
Page 1 of 3
Loading...
Similar Threads - Hill start assist
  1. Meghan

    How to drive up steep mile-long hill?

    Meghan, Jul 19, 2018, in forum: Gen 3 Prius Main Forum
    Replies:
    20
    Views:
    5,370
    tpenny67
    Aug 7, 2018
  2. Andrew810

    Hit the incline of a hill hard.

    Andrew810, Oct 11, 2017, in forum: Gen 3 Prius Main Forum
    Replies:
    15
    Views:
    2,594
    bisco
    Oct 24, 2017
  3. hyphz

    About hill starts..

    hyphz, Nov 20, 2010, in forum: Gen 3 Prius Main Forum
    Replies:
    2
    Views:
    1,212
    fuzzy1
    Nov 20, 2010
  4. garytail

    Hill Start Assist HSA- Can it be switched on for longer than 2 secs?

    garytail, Sep 15, 2010, in forum: Gen 3 Prius Main Forum
    Replies:
    10
    Views:
    1,931
    32kcolors
    Sep 16, 2010
  5. randalll

    Hill-Start Assist in Reverse?

    randalll, Nov 25, 2009, in forum: Gen 3 Prius Main Forum
    Replies:
    6
    Views:
    4,931
    hsiaolc
    Mar 9, 2010