Latest batch of software updates for the HCH-II (June 2010)

Discussion in 'Honda Hybrids' started by msantos, Jun 21, 2010.

  1. racer

    racer Member

    just to confirm about the ECU update, I don't see any obvious decrease in FE so far and assist/regen do seem to be less aggressive now.

    after rush hour lunch trip of 7 miles, my FE is still around 48Mpg.

    update for whole day: 28Miles, around 50F temp, FE 49Mpg, tires 32psi
     
    Last edited: Dec 11, 2010
  2. pcope

    pcope Well-Known Member

    hi MSantos,
    I've not kept up with my reading! I just saw your latest advice about care and feeding for the HCHII. A couple of quick questions, if you don't mind--

    Based on what I (thought I) read in a previous thread, I've been putting my 2008 HCHII into neutral when stopped at a light (but not in autostop); it definitely drops the LOD a bit, though not as much as before the 2009 software upgrade. Why is putting the car into L recommended instead? Is this another strategy to force regen a bit?

    And regarding the need to unplug the Scangauge when parking more than 1 hr. Do you mean that it needs to be unplugged from its power cord, or that the power cord itself needs to be unplugged from the socket beneath the dashboard? The latter would become a real PIA-- I hope that's not what's recommended. And I should know this already, but won't unplugging and re-plugging the scangauge on a daily basis require constant re-setting of its parameters to match the HCH II?

    thanks

    Philip
     
  3. msantos

    msantos Eco Accelerometrist

    Hi Phillip;

    These suggestions were offered primarily for those who've had the latest software updates and want to give the software a helping hand. ;)

    Placing the vehicle in L while it is not moving will provide a steady boost charge of 3-4 bars of regen with much less stress to the engine than the customary revving of the engine to 3500 RPM (like the dealers are told to do). Still, this is an FE killer since it places far more load on the engine than just having it in neutral or auto-stopped, but on the positive side that extra load only causes the engine to hit the 1000-1100 rpm - which in my books is a good trade-off especially when auto-stop is still not present in the current warm-up stage.

    We have found the scangauges to interfere with the latest software updates often causing random and even erroneous codes to be reported. Also, on the HCH-II the scangauge is always live on the ODB-II port and always pillaging little bits of power even when the car is powered OFF. In some cases we've seen the Scangauges lighting up just like that and staying on for a short while before going "back to sleep".
    Just to be sure, it is best that we unplug the scangauges at the RJ-45 end and leave it that way until the car is powered up again. WE should not need to unplug the cable at the OBD-II port under the dash.

    When unplugged, the scangauge does not forget your settings at all. So, we're good on this front too.

    Cheers;

    MSantos
     
  4. pcope

    pcope Well-Known Member

    well, thanks, as usual.

    As you may have guessed, I haven't gotten the latest software update yet. I've been so frustrated with the effects of last year's update (which really nailed my winter MPG) that I'm leery of yet another update that will probably make my car's efficiency even worse. And with my 2008, I've been lucky not to have experienced the battery frustrations of owners with older models, although I recognize that this may simply be a matter of time.

    Aside from whining, here's a question that I don't remember seeing on earlier posts. When I leave work (the car's cold), I sometimes take a route that has a long steep downhill. I'm obviously not getting much (if any) regen from my braking before I've warmed things up. But I did discover that if I drop into S instead of D, this gives me a couple of bars of regen (as well as slowing the descent a bit). Is there any reason NOT to do this? Does it add undue stress to the engine while it's still cold?

    thanks

    Philip
     
  5. msantos

    msantos Eco Accelerometrist

    Hi Phillip;

    I usually do not like to stress the engines when it is cold and I often opt for low RPM conditions if I want to add some charge to the pack.

    Side note: Unlike the Prius, the HCH-II actually has an innate tendency to suppress the rougher colder ICE operation with the application of electric assist as a vibration dampener. So it makes some sense to wonder about the extra stress and weather it is justified.

    However, in your particular situation I see it as a good thing to do since the warm stage you are in does not allow for coasting or braking regen and it would be a waste to not pick that extra regen up with a descent in S. ;)


    Cheers;


    MSantos
     
  6. rhwinger

    rhwinger Well-Known Member

    Quote: We have found the scangauges to interfere with the latest software updates often causing random and even erroneous codes to be reported. Also, on the HCH-II the scangauge is always live on the ODB-II port and always pillaging little bits of power even when the car is powered OFF. In some cases we've seen the Scangauges lighting up just like that and staying on for a short while before going "back to sleep".

    Msantos, I'd like to hear a little more specifics on this. I never unplug my SG, and have never seen error codes. Yeah, the SG display "blinks" on shutdown sometimes, but I can't see this as a problem.

    Thanks,

    Bob
     
  7. msantos

    msantos Eco Accelerometrist

    Hi Bob;

    So far we've had a handful of reports that pretty much point to the scangauge being a contributing problem. To be more specific, the car can operate flawlessly for several months and then the DTC events appear without warning. They appear not only when the car is being powered up but also while it is being operated under steady throttle and speed.

    Obviously, the first thought many owners have is that of impending doom and they just book an appointment with their dealer right away. In some cases the dealer will see the codes and ASSUME that it is a genuine problem requiring correction when in fact no real failure has taken place.

    That is why we have always suggested that whenever we encounter such warning lights that we first perform a power reset and then take it to the dealer if and only if, the IMA and CE warning lights re-appear while the scangauge is unplugged.

    Anyway, the earlier suggestion was primarily directed at folks who use a scangauge II and fit both of the following conditions:
    - Received the June 2010 (or newer) software batch update
    - Experienced DTC events that cause IMA and CE warnings



    Cheers

    MSantos
     
  8. Kets_One

    Kets_One New Member

    @MSantos
    The other day you mentioned that Honda is currently writing a new software update for the HCH-ii. This update should fix or (to some extent) alleviate the adverse effects that the June 2010 update caused.

    Since I have the June 2010 update installed I am keen on installing any improvements.
    Do you have any information on a future release date for this update?
     
  9. msantos

    msantos Eco Accelerometrist

    Hi Kets_One:

    There have been a couple of versions produced after the 2010 "Big" update but none has added too much in terms of significant changes over what the 2010 baseline offers.

    I believe that by now one of the newer rewrites should be available especially if your dealer is authorized to get it for you. If you are one of those folks who have been having issues with the 2010 update then it may help to let your dealer know about it as that will help them secure and install the newer updates onto your car.


    Cheers

    MSantos
     
  10. Kets_One

    Kets_One New Member

    I consider myself fortunate not experiencing the dreaded battery deterioration and lack of power described by others. Therefore I have not contacted my dealer yet. The reason I had them install the June 2010 update was that they told me that I would probably not be eligible for battery replacement (if that was ever necessary) within the 8 yr warranty period of the IMA system.

    However, I do notice some reduced power and more frequent forced regen. That´s the reason for me to look for this rumored upcoming update. Am I correct if I conclude that you have no information on this upcoming update?
     

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