• 4 Stroke Husqvarna Motorcycles Made In Italy - About 1989 to 2014
     TE = 4st Enduro & TC = 4st Cross

  • Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

449/511 ECU Protection?

bigmo

bigmo

Husqvarna
AA Class
I was doing some testing last night with my new de-catted pipe (I introduced a rattle somehow). Anyway, what is clear now is that I ran the bike out of gas.

Before I noticed I was empty, I had a series of no start attempts - maybe 4-5 in a row, a typical out of gas light, stutter stumble etc.. Then the weirdest thing happened - the whole bike shut off. Zero, no fuel pump, lights, nothing.

I was like "uh oh". I looked around the pipe making sure I didnt clip a wire of any kind. Looked it over well and gave it another try (about 90 secs had elapsed). Now it fired - same thing, about 3-4 series of stumbles. On the 5th one it shut off again totally.

I freaked for a second as I wasn't tweaking with anything with juice and while looking over the bike, I noticed the tank was bone dry. I put about 1/2 gallon in as I figured I might as well fix one easy thing before I figured out how I fried the electrical system.

I tossed the bike on my jack, and for grins, pulled the clutch and hit the button (no key on the 13) and all was normal. Now, zero issues.

So there must be some kind of automated protection on multiple failed start attempts. I did get several of the "out of gas backfires" - which should have made me think the bike was actually out of gas.

Anyone discovered that? I ASSUME this is normal and not some oddity I uncovered.
 
I had a similar symptom but not out of gas. It was an intermittent contact in the main (30 AMP) fuse holder.
 
Radar said:
I had a similar symptom but not out of gas. It was an intermittent contact in the main (30 AMP) fuse holder.
Click to expand...


I looked that over afterwards - but the manner in which it shut down twice under identical circumstances made me think it was a planned protection. No surprise, but I cannot find any mention of it in the service manual.

I will look the fuse block over carefully. I would think that if I had fuse issues, I would have running issues too - and none to date (other than flameouts early on).
 
After the bike starts it will run with the fuse out. Try it. That is what the big capacitor is for.
 
Weird - I will look that fuse area over well. I do have some dilectic grease - may need to check things over.

What did you find wrong with yours? Was it that the blade was not contacting well?
 
The blade had not been making very good contact for a while. The arcing had eroded a grove in the fuse blade. I bent the fuse socket a little with a dental pick and put the new fuse in with some "Copper Shield" to enhance the connection. The plastic in the fuse holder may have been preventing a solid contact, I scraped a little plastic away to allow more metal to metal contact. I was prepared to replace the fuse holder-relay assembly but so far so good.
 
Hi Bigmo,

If you have an earthX battery, that is your issue. It has a self-preservation circuit. If you wait like 30 sec it will reset.
 
N4544D said:
Hi Bigmo,

If you have an earthX battery, that is your issue. It has a self-preservation circuit. If you wait like 30 sec it will reset.
Click to expand...

Bingo! I DO have an EarthX.

Never thought that a battery would be that smart!
 
I sent this thread to EarthX for comment - I still cannot find any info in any of the tech docs about this self protection mode. They mention charging protection and low voltage protection quite a bit but zip on this. My total crank time was < 5 secs - that seems really odd to me.
 
If the battery shuts off for self protection it will cause the ECU and odometer to reset. That is not a good.
 
Keep us posted; I never saw anything written about this either (didn't bother looking), but after I installed my earthX and I had the same issue as you. Scared me at first as I was in the middle of Baja, but it reset and all was good (thankfully). Never had any cranking limitations with the stock battery, previously.
 
Seriously - what a GREAT company. Add EarthX to my list of A+ products and services!

I sent an email (to busy to call) and got this back from the lady that handles their correspondence.

Thank you for the detailed description and if it is okay with you, I can answer this question.

We advertise and talk about our BMS for over discharge, over charge and cell balancing features but our patent pending technology actually does many other features as well that is pretty technical so we don’t “market” it with all the features it really has. J


We do have multiple failed start protection built into our battery for several reasons: It protects your starter, your starter solenoid , your electrical system and the battery from damage and it will do exactly as you say if the combinations of attempts are more than 9.6 seconds in a minute time frame. (to be exact) I know you say it was no more than 5 seconds but the reality was it had to be at least 9.6 seconds to trigger the safety feature and when someone is stranded and trying to start their bike, cranking for 5 seconds more is easily done without realizing they did it. And then it will reset all on its own after you wait 2 minutes. I know this doesn’t seem like a lot of time but the bike should fire within a second if there is no issues and this disconnect feature saved the battery, your electrical system and your starter possibly as you might had continued to try and start the bike before the “out of gas” realization happened. This feature was added due to 1,000’s of batteries on the market and real world examples of what really happens to the battery and vehicle if someone tries to crank too much. People do it all the time without realizing it and the 9.6 seconds will prevent damage done to anything. This time is based on a lot of research and development and it not random.
 
I have never heard of this self protection mode in the Earthx battery before. I would be happy to know it has one, I would much rather prefer a reliable battery over my odometer being reset. I do know that this self protection exists inside the Keihin ecu's on the KTM's and though I have never ran one of my Husky's dry before, it wouldn't surprise me if it is built into them as well. I would stress that running fuel injected bikes completely dry is not a good thing. The fuel pump obtains its lubrication from fuel and air bubbles in the injector line are a head ache.
 
bigmo said:
Seriously - what a GREAT company. Add EarthX to my list of A+ products and services!

I sent an email (to busy to call) and got this back from the lady that handles their correspondence.

Thank you for the detailed description and if it is okay with you, I can answer this question.

We advertise and talk about our BMS for over discharge, over charge and cell balancing features but our patent pending technology actually does many other features as well that is pretty technical so we don’t “market” it with all the features it really has. J


We do have multiple failed start protection built into our battery for several reasons: It protects your starter, your starter solenoid , your electrical system and the battery from damage and it will do exactly as you say if the combinations of attempts are more than 9.6 seconds in a minute time frame. (to be exact) I know you say it was no more than 5 seconds but the reality was it had to be at least 9.6 seconds to trigger the safety feature and when someone is stranded and trying to start their bike, cranking for 5 seconds more is easily done without realizing they did it. And then it will reset all on its own after you wait 2 minutes. I know this doesn’t seem like a lot of time but the bike should fire within a second if there is no issues and this disconnect feature saved the battery, your electrical system and your starter possibly as you might had continued to try and start the bike before the “out of gas” realization happened. This feature was added due to 1,000’s of batteries on the market and real world examples of what really happens to the battery and vehicle if someone tries to crank too much. People do it all the time without realizing it and the 9.6 seconds will prevent damage done to anything. This time is based on a lot of research and development and it not random.
Click to expand...

Wow, that is awesome!
 
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