Dash Clock Loosing 1 minute Per Day???

Discussion in 'Gen III 2010+ Prius Audio and Electronics' started by Hank101, Apr 30, 2012.

  1. Hank101

    Hank101 Member

    Joined:
    Feb 14, 2012
    108
    13
    SC
    Vehicle:
    2012 Prius
    Model:
    Two
    Any ideas as to why this would happen on a new 2012 Prius II?
    Thanks
     
  2. dustoff003

    dustoff003 Blizzard Brigade #003

    Joined:
    Dec 27, 2010
    1,351
    327
    Waianae, HI (Oahu)
    Vehicle:
    2011 Prius
    Model:
    Five
    Interesting mine seems to gain a minute every couple of months.


    Posted from my iPhone via the Tapatalk app.
     
  3. Tech_Guy

    Tech_Guy Class Clown

    Joined:
    Jan 8, 2007
    870
    116
    Silicon Valley, CA --- Land of Fruits & Nuts
    Vehicle:
    2011 Prius
    Model:
    Two
    You're driving so fast that time is running backwards???

    Keith
     
  4. GrumpyCabbie

    GrumpyCabbie Senior Member

    Joined:
    Dec 14, 2009
    6,395
    1,829
    North Yorkshire, UK
    Vehicle:
    2010 Prius
    Model:
    III
    lol, it's all that speeding near 88 mph eh? ;)
     
  5. jdcollins5

    jdcollins5 Senior Member

    Joined:
    Aug 30, 2009
    4,697
    989
    Wilmington, NC
    Vehicle:
    2010 Prius
    Model:
    III
    I have to adjust mine a couple of minutes every few months. I have never bothered to remember whether it was forward or backward.

    The next time you are at the dealer show it to them. If some way you can take a dated picture one day and then a second dated picture the next day then you can verify it for them.
     
  6. Tech_Guy

    Tech_Guy Class Clown

    Joined:
    Jan 8, 2007
    870
    116
    Silicon Valley, CA --- Land of Fruits & Nuts
    Vehicle:
    2011 Prius
    Model:
    Two
    Maybe a bit faster than 88 mph, like something closer to the speed of light (~186,282 miles/sec)

    (That is fast enough where the red stop lights appear green as you approach them.)

    Keith :)
     
  7. prius2010II

    prius2010II Member

    Joined:
    Aug 19, 2010
    224
    12
    us
    Vehicle:
    2010 Prius
    Model:
    III
    Which is more likely? A Prius driving at the speed of light or a flux capacitor equipped Prius able to break the time barrier at 88mph?
     
  8. fuzzy1

    fuzzy1 Senior Member

    Joined:
    Feb 26, 2009
    7,769
    2,045
    Western Washington
    Vehicle:
    2012 Prius
    Model:
    Three
    That is a 700 ppm error on the clock crystal. It is defective, as even a very cheap crystal should be within 50 ppm (parts per million).
     
  9. blane

    blane Carmudgeon

    Joined:
    Apr 10, 2012
    27
    4
    Suburb NW of NYC
    Vehicle:
    2011 Prius
    Model:
    Three
    At least there is a "00" button to zero out the excess minute when you press it on the top-of-the-hour radio station time signal.
     
  10. DetPrius

    DetPrius Active Member

    Joined:
    Apr 24, 2009
    543
    89
    Southeast Michigan
    Vehicle:
    2010 Prius
    Model:
    III
    Mine gains almost a minute a month. I brought this up when it was under warranty and they "checked it" and said it was not off by enough to replace under warranty. This is something I would expect from a clock in a car in the 70's but not in 2010, or 2012. Lowest bidder for parts?
     
  11. KK6PD

    KK6PD _ . _ . / _ _ . _

    Joined:
    Mar 24, 2008
    3,860
    772
    Los Angeles
    Vehicle:
    2008 Prius
    Model:
    Five
    So at what altitude are you driving? It's a known fact the further you get away from Earths Gravity Well, the passage of time changes, relative to Sea Level on the planet!
     
  12. Rebound

    Rebound Senior Member

    Joined:
    Mar 11, 2010
    1,921
    584
    SF Bay Area, California
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    I adjust my clocks twice a year, whether they need it or not.
     
  13. Big Steve

    Big Steve ramblin wreck

    Joined:
    Mar 5, 2012
    401
    38
    Richmond VA
    Vehicle:
    2012 Prius
    Model:
    Four
    A chip that can not keep time for a 24 hr period is scary as the timing signal for everything else the electroincs in htis car do.

    Are you sure it is the car and not the time source you are comparing it to?
     
  14. Eoin

    Eoin Active Member

    Joined:
    Oct 6, 2009
    593
    115
    Long Island
    Vehicle:
    2010 Prius
    Model:
    IV
    On the bright side, a stopped clock will be accurate twice a day.
     
  15. KK6PD

    KK6PD _ . _ . / _ _ . _

    Joined:
    Mar 24, 2008
    3,860
    772
    Los Angeles
    Vehicle:
    2008 Prius
    Model:
    Five
    The clock chip that the clock uses is self contained, does not accept any time synchronizing or external reference. The clock chip timing is usually set by a quartz crystal and a capacitor, sometimes adjustable. In this case I would think the crystal is out of tolerance, or the cap is not the right value.
    The only way to fix this, is 1, take the clock apart, see what clock chip they use, look up the data sheet for that chip, figure out what they are using for reference. Repair, replace components as necessary. Or 2..
    Now we all know that NO dealer anywhere is going to go to that extreme to fix the clock. They are just going to pull a new clock unit off the shelf, and replace the defective one. Assuming you find a sympathetic ear, and a Service Manager who thinks losing a minute a day is worth the efforts to swap out the clock! Of course you have to prove the clock is bad, and out of tolerance.
    At this point I will say good luck, you might just have to bite the bullet and live with it, or buy a clock replacement yourself and do your own swap out!
    Let us know how it goes! :D
     
    1 person likes this.
  16. tach18k

    tach18k Member

    Joined:
    Feb 21, 2012
    406
    36
    SoCal Beach Area
    Vehicle:
    Other Hybrid
    Havent seen and issue with my clock, seems spot on....
     
  17. Big Steve

    Big Steve ramblin wreck

    Joined:
    Mar 5, 2012
    401
    38
    Richmond VA
    Vehicle:
    2012 Prius
    Model:
    Four
    Understood that the clock is separate, just hope the rest of the electronics are better designed and implemented.
     
  18. KK6PD

    KK6PD _ . _ . / _ _ . _

    Joined:
    Mar 24, 2008
    3,860
    772
    Los Angeles
    Vehicle:
    2008 Prius
    Model:
    Five
    I would think so, I would imagine the clock is outsourced to a third party supplier!
     
  19. Big Steve

    Big Steve ramblin wreck

    Joined:
    Mar 5, 2012
    401
    38
    Richmond VA
    Vehicle:
    2012 Prius
    Model:
    Four
    Let us pray! ;-)
     
  20. qbee42

    qbee42 My other car is a boat

    Joined:
    Mar 2, 2006
    18,044
    2,968
    Northern Michigan
    Vehicle:
    2006 Prius
    And is shockingly inexpensive. Even as an electronics designer, I am continually amazed at the low cost of these mass produced items.

    Tom