No voltage on TPS?

[Mark Rivera <marr@xxxxxxxx>]

Hi. Had a little run in with a truck the other day -- no collision, 
except for me having to go wide on a RH turn and semi hitting the far 
curb with the bike. I came off (still had one hand on the bars) but the 
bike stayed upright and we only traveled about 3 meters or so together 
like that. Thanks to the plastic head protector, the sides of the 
centerstand and shifter, and the generously-tall cement curb, the bike 
as a whole came through unscathed. Me, too. Safety gear is good.


My question is about the TPS / throttle position sensor (aka 'throttle 
switch' in the parts fiche)...

The four-wire cable came unplugged without damage; I guess maybe my toe 
pulled it out. In the moment, I didn't realize it, and after I got back 
on rode for a bit with it still unplugged.

Right now, with the cable attached the bike nearly always dies when I 
release the throttle. (Sometimes it does idle on it's own, but very, 
very slowly; sub-300rpm.) The 'choke' lever is helping in this regard, 
as it keeps the bike running enough to sit through a stoplight. At 
highway speeds the bike doesn't feel any different that usual.

I noticed that the TPS looked like it had been rotated somewhat, so I 
measured it, looking for the ~370-400mV DC on the red/white wire. I 
don't get any voltage on it at all. (My meter is a known-good digital 
Fluke, and I did later verify conductivity between where I pierced the 
wire and the pins in the socket itself.)

So, with no voltage does that mean I need to replace the TPS? What about 
measuring the other wires?

Thanks,
Mark
R1100R '97

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