General Category > Engine related issues

Q: TPS Adjustment procedure

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beemer:
As far as i know you should adjust TPS when the throttle is closed,ignition on,engine off>idle actuator is in basic position,idle switch inside idle actuator is on.When you start the engine,idle actuator is constantly slightly moving so the bar will be red,engine has to be off to adjust TPS.Is the Idle switch working?That could be causing your problem.I had similar problem before and i had to cut two threads of the spring under the rubber cover to make the switch work every time.

Seppo:
Beemer: Thanks for the comment. Now what is "idle switch", how do you know it is working? I see only one switch in the TB-setup. The one cancelling cruise control, being at the "end" of throttle closing cable. Is this the switch you mean? If so - it works...

But as said

- engine off
- idle actuator in place (physically)
- power on
- TPS Adjustement -> "Start"

You can hear the actuator driving a moment and then the bar goes about 1" on the red right side. When I turn the throttle to close-direction that couple of mm's it goes (to cancel the possible cruise) by activating the micro switch at the lower end of the cable, the bar decreases to the middle. If i now start the test again, it might complete with "OK" or sometimes it gives "Idle actuator out of limits" or something like that...

And the bike idles from 1400 - to (in best case) 1150RPMs.

To make the case even more complicated I ran the same test in another LT and it behaved differently. The bar went on the right side (red) but did not decrease on the green area even if one closed the throttle. And the bike idles like a dream :-(

beemer:
Idle switch is actually in the idle actuator it is not the cruise control cancel switch,check continuity between pin 3 and 4 in idle actuator connector,when the throttle is closed switch should be on,when is throttle open switch should be off.

Seppo:

--- Quote from: beemer on May 25, 2013, 09:39:06 PM ---Idle switch is actually in the idle actuator it is not the cruise control cancel switch,check continuity between pin 3 and 4 in idle actuator connector,when the throttle is closed switch should be on,when is throttle open switch should be off.

--- End quote ---

Thanks! Another day with learning something new  :)

Alan T. Butler:
Has anybody seen a step-by-step demo of how to do the idle actuator calibration on a GS (or GS Adv)?  My bike is running fine, but I would like to try this feature.  Unfortunately I have read on some forums where folks have tried this and now their bikes idle very poorly, if at all.  The typical response from other posters is that the person probably didn't follow the procedure perfectly.  I would like to see this done before I try it on my bike. 

Thank you.
 ATB

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