06 Sonata intermittent wiper delay

Discussion in 'Hyundai Sonata' started by Matt Whiting, May 19, 2006.

  1. Matt Whiting

    Matt Whiting Guest

    What are folks seeing for the delay times on your 2006 Sonata's
    intermittent wipers? Mine seemed to have a pretty short delay compared
    to my other vehicles, so today I timed them. My Chrysler minivan and
    Chevy truck run 20+ seconds on max delay (the truck is probably closer
    to 30 seconds, the van is 20). And even on min delay, they still take a
    short pause between wipes, maybe a second or slightly less. You can
    easily tell the difference between min delay on intermittent and
    continuous on low speed.

    My Sonata delay is only 9 seconds on max delay, and on min delay the
    wipers run continuously with no discernible delay between wipes. I
    can't tell the difference between min delay on the intermittent setting
    and the continous wipe position. This doesn't seem right to me and is a
    pain in light mist conditions as the wipers run way more often than
    necessary. What are you other 06 Sonata owners seeing?

    Matt Whiting, May 19, 2006
  2. Matt Whiting

    hyundaitech Guest

    Here's the specs on the intermittent wipers:

    Shortest period, T = 2.6 +/- 0.7 sec

    Longest period, T = 18.0 +/- 1.0 sec

    The manual makes the implication that the longest period can only be
    achieved if the vehicle is not moving.

    I had to get this out of the hard copy of the manual. I'm not sure why
    it's not available online.
    hyundaitech, May 19, 2006
  3. Matt Whiting

    Matt Whiting Guest

    I was traveling between 55 and 60 when I timed it this morning, but the
    shortest period wasn't even close to 2.6 seconds, or even 1.9 seconds.
    It was zero, or at best a few milliseconds. Less than what I could
    perceive as any delay at all. I'll time it setting still sometime.

    Matt Whiting, May 19, 2006
  4. Matt Whiting

    Darby OGill Guest

    My observation would be closer to HT's numbers, with the exceoption of the
    shortest cycle...I'd guesss it to be one second at most.
    Darby OGill, May 19, 2006
  5. Matt Whiting

    Matt Whiting Guest

    Is this at a stop or while at highway speed?

    Matt Whiting, May 19, 2006
  6. Matt Whiting

    Eric G. Guest

    I have to agree. That manual is either wrong, or our cars are "broken".
    On the fastest setting there is no perceivable "stop" at all, but as you
    said, it could be a few milliseconds at most.

    Eric G., May 20, 2006
  7. Matt Whiting

    Eric G. Guest

    Below 20 MPH perhaps, but even in a residential area (25 MPH by me) the
    stop time was nothing.
    Eric G., May 20, 2006
  8. Matt Whiting

    Matt Whiting Guest

    It has been a while since I studied human factors stuff, but I think
    most humans can perceived events that last even 50 milliseconds, 100 for
    sure. I can't perceive any delay on the S end of the range, so I'm
    pretty sure it is less than 50 ms.

    Matt Whiting, May 20, 2006
  9. Matt Whiting

    Eric G. Guest

    Holy sh*t. We actually agree on something :p

    Eric G., May 20, 2006
  10. Matt Whiting

    Matt Whiting Guest

    Well, random chance says that should happen from time to time. :)

    Matt Whiting, May 20, 2006
  11. Matt Whiting

    art.obrien Guest

    If the new sonata is set up like my 03 Santa Fe the delay time is
    related to what speed the transmission is moving. Once you hit third
    gear the shortest delay pretty much becomes a continuous wipe. Below
    3rd gear or at a stop there is a brief pause when on the shortest

    The assumption is that there will be more mist as you go faster. It is
    supposed to work like those car stereos in other makes that raise or
    lower the volume with the car's speed.

    Check it out... Is the new Sonata set up the same way?
    art.obrien, May 20, 2006
  12. Matt Whiting

    Matt Whiting Guest

    Yes, I will check it out next time I drive the car. I was going 55 or
    higher when I did the first check so that may explain the short delays.
    However, 9 seconds is still too short for the longest delay setting,
    even at cruise speed.

    Matt Whiting, May 20, 2006
  13. Matt Whiting

    Darby OGill Guest

    Time for me to eat crow! timed the intermittent wipers with a "thousand"
    count last night......8 for longest notch, 4 for the next, 1 for the third,
    ....2 more notchs with no perceivable delay from "on"........I did this at
    modest hi-way speeds (55-65 mph)......don't mind the 1st 3 settings at
    all-seem good to me, but the useless last two are a bit odd.
    Darby OGill, May 20, 2006
  14. Matt Whiting

    Matt Whiting Guest

    That sounds pretty much like my timing, although I did use my trusty
    Timex rather than counting. :)

    I think only my last notch was "useless", but I did think once that both
    of the last notches gave continuous operation as you say. However, I
    tried it on the way home and couldn't replicate what I thought I saw on
    the way into work, so I'll need to check again to be sure.

    Matt Whiting, May 20, 2006
  15. Matt Whiting

    hyundaitech Guest

    If the 2006 Sonata intermittent wipers are like the prior Sonatas, I
    believe there's a two- or three-tier timing system based on vehicle speed.

    I believe once you reach a predetermined speed, the fastest setting
    becomes constant operation, and when you reach the next predetermined
    speed, the fastest two settings become constant operation.

    I actually had to replace the time and alarm control unit (basically a
    "dumb" body control module) in a 2003 Sonata because the customer noticed
    it wasn't changing speed as it was intended. I don't think technical
    assistance was even able to provide me with the exact details of how the
    delay changed other than that there were tiers as described above.

    Sounds to me like they may be operating normally. Check 'em again when
    not moving and compare with the specs.
    hyundaitech, May 20, 2006
  16. Matt Whiting

    Matt Whiting Guest

    Thanks, will do.

    I honestly can't understand the logic of having the fastest speed or,
    worse yet, two speeds be continuous operation when you already have a
    continuous operation level position. That is just nuts. What was
    Hyundai thinking when they designed these wipers?

    Matt Whiting, May 20, 2006
  17. Matt Whiting

    Matt Whiting Guest

    I just checked my wiper delay with the car sitting still in my driveway.

    The shortest period is 1.0 to maybe 1.2 seconds. Appears to be well
    below the spec.

    The longers period is 17 seconds plus or minus a little, so that's
    probably pretty close to spec.

    Is there any adjustment to this? I'm assuming the delay is set by a
    varistor (or set of resistors) in the switch itself and thus non adjustable.

    Matt Whiting, May 20, 2006
  18. Matt Whiting

    hyundaitech Guest

    I'm guessing that they intended for you to set them when sitting still and
    then the delay lessened as you sped up.

    Speed sensitive wipers. It's the latest thing. Haven't you heard? All
    the big-guy cars have it, so Hyundai needs it, too. Well, I'm sure you
    already know the logic behind this.
    hyundaitech, May 20, 2006
  19. Matt Whiting

    hyundaitech Guest

    Your body control module reads the resistance of the wiper switch and then
    sets the delay accordingly.

    What's worse, the shortest delay being out of spec isn't necessarily a
    problem, either. Those sorts of things get changed all the time during
    the manufacturing run (for who knows what reasons) without anyone telling
    the people who work on the cars.
    hyundaitech, May 20, 2006
  20. Matt Whiting

    Matt Whiting Guest

    Yes, design by MBA or design by marketing.

    I'm not against the speed sensitive wipers, I just think that it is dumb
    to have the shortest period go to a point that it overlaps a setting
    already available. This is just poor design. The short setting should
    always maintain some delay regardless of speed. Maybe it is 3 seconds
    when standing still and 1 second at 70, but having the short period go
    to zero just makes no sense to me.

    Personally, I'm more tha happy with my conventional intermittent wipers
    that let me set the delay from a second or so up to 30 seconds. Works
    great, no surprises!

    Matt Whiting, May 20, 2006
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