• 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 The previous version was outdated and no longer supported.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!

TPS Resetting, why needed?

Apri11

Apri11

Husqvarna
A Class
Coming home from a ride this arvo, bike could not idle nor accelerate and just kept dying. Pulled over, performed the TPS reset and all good. Question is, why and how does it get muddled up in the first place?
 
ELECTRONICS! Have you ever had to reset anything electronics.....it's a signal,,,maybe 4 to 20 milli amps..
As least that how the stuff I work on is,,,lowest signal is = to 0 and highest = 100. The signal gets misread or garbled
Then device is reading 0 or 100 incorrect, so throttle position is incorrect in relation to timing and fuel delivery...
 
This is my opinion but I do have years of experience working with battery powered systems with computers on board.

Our bikes are based upon race bikes and in order to save weight the battery and battery cables are marginal.

While starting the engine sometimes the starter will stall and draw enough current to cause the voltage at the ECU to drop below the reset point and the TPS and odometer are inadvertently reset and the TPS may be at the wrong position. Also because the ground connections for the entire electrical system are marginal the system may be susceptible to electrical interference which could raise havoc with the ECU.

As I said this is just my theory but by upgrading the battery and cables I have so far eliminated this problem on my bike.
 
Londin said:
After earthing the throttle body, does people still see the issue?
Click to expand...

I actually had the throttle body earthed, though I took it off before yesterdays event only because of a few throttle weirdness issues in the past couple of days. I think though that that was probably more to do with fuelling than the muddled up throttle positioning. I'll put it back on again, reset Air Bypass to factory, reset TPS and see how I go today.
 
I was riding out in the desert one night and I saw a bright light. Before I knew it, we, my bike and I were aboard an alien ship. They poked and prodded my bike, but could not figure out what made it so powerful. I came to hours later, but my tps was acting weird. After doing a TPS reset, I was on my way once again.
 
Well, just got back from today's ride and TPS started acting up again even though the throttle body was earthed. It died going down a hill, wouldn't idle properly and would die immediately when the throttle was opened either slowly or fast. Disconnected battery, discharged circuit by pressing starter, pulled plug from ECU and pulled the power up plug. Plugged ECU back in, reconnected battery, performed TPS reset and started bike. Plugged in power up plug when bike was running, even though the dash LCD threw a 'fail' the bike ran fine. Pulled over turned off then back on again, the 'fail' error disappeared and bike ran fine for rest of the ride. Man these bikes are temperamental with regards to the electronics! With what happened today, I'm not entirely sure by earthing the throttle body cures the woes with the TPS weirdness.
 
Radar said:
As I said this is just my theory but by upgrading the battery and cables I have so far eliminated this problem on my bike.
Click to expand...

Upgraded cables? Please explain. I know that my Hypermotard had shit cablening to/from the battery. I found an upgrade kit and installed it. Bike started LOTS better after that.
 
Tinken said:
Sometimes when you load an OS onto a computer, it's buggy. I think these eproms are the same way. After reloading my ecu, the bugginess disapeared.
Click to expand...

I tend to agree with that statement. The troubles I am having points to the software in my opinion. Hopefully my dealer can load the BMW map 3 and then I'll see how everything goes.
 
Londin said:
Upgraded cables? Please explain. I know that my Hypermotard had shit cablening to/from the battery. I found an upgrade kit and installed it. Bike started LOTS better after that.
Click to expand...

I increased the size of the battery positive and negative cable, and the starter cable, to 8 gage. I also shortened the ground wires by moving them to the sub-frame bolt nearest the battery.

If you have modified the exhaust you may need the "open exhaust map" in your ECU.

Although I don't understand what that will have to do with the TPS needing to be reset.

My exhaust is stock and it works okay.
 
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