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Buell Forum » Big, Bad & Dirty (Buell XB12X Ulysses Adventure Board) » Archive through April 21, 2016 » ECM/Battery « Previous Next »

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Anfear
Posted on Thursday, January 07, 2016 - 12:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Anyone know if changing the battery will require a TPS zeroing?
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Timinnc
Posted on Thursday, January 07, 2016 - 12:56 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Changed my battery last week, and did not need to to reset mine. I was wondering the same thing. I did take the time to clean the ground contact to the frame and all the surfaces in between there and the battery post. BIG difference, no hesitation even in this chilly weather.
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Anfear
Posted on Thursday, January 07, 2016 - 02:46 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
I'll do that, thanks.
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651lance
Posted on Thursday, January 07, 2016 - 06:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
You do not need to reset your TPS when you change your battery.
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Reepicheep
Posted on Thursday, January 07, 2016 - 08:04 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Correct. The TPS reset is simply accounting for mechanical and manufacturing slop in the throttle position sensor (which is just a potentiometer connected to the throttle butterfly).

Basically, you are dialing the idle screw all the way out (so the butterfly is completely closed), snapping the throttle shut a few times (to make sure the butterfly is completely closed), then pushing a digital button to tell the ECM that the current potentiometer value is "as low as it will ever get, so call it zero".

The ECM then takes this value, and loads it into flash memory, which is memory that is not lost when the ECM looses power.

(A potientiometer is simply a resistor that changes resistance proportionally to the position of the knob)
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Teeps
Posted on Thursday, January 07, 2016 - 11:27 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Reep,
Excellent explanation.
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Anfear
Posted on Thursday, January 07, 2016 - 04:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Thanks.
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