chris-p-duck
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| posted on 21/10/09 at 07:13 PM |
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GSXR TPS wiring
Hi All,
I am trying to wire up my TPS from my GSXR TBs to the MS. The wires from the MS are nice and clearly identified however the wires from the TPS are a
mystery to me. I thought of just taking a guess and wiring it up and then trying to identify the signal wire. However I have no idea what range or
sort of output I was going to look for. The wires are red, black and yellow. So is it a fair guess to say black = earth, red = 5v feed and yellow =
signal wire??
Any advice welcome..........
Cheers
Chris
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flak monkey
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| posted on 21/10/09 at 07:35 PM |
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From the MS website
quote:
To hook up your throttle position sensor (TPS), disconnect the TPS, and use a digital multi-meter. Switch it to measure resistance. The
resistance between two of the connections will stay the same when the throttle is moved. Find those two - one will be the +5 Vref and the other a
ground. The third is the sense wire to the MegaSquirt® controller. To figure out which wire is the +5 Vref and which is the ground, connect your meter
to one of those two connections and the other to the TPS sense connection.
If you read a high resistance which gets lower as you open the throttle, then disconnected wire is the one which goes to ground, the other one which
had the continuous resistance goes to the +5 Vref from the MegaSquirt® EFI Controller, and the remaining wire is the TPS sense wire.
Sera
http://www.motosera.com
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motorcycle_mayhem
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| posted on 21/10/09 at 07:42 PM |
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Yep, that's about right.
For some reason on my earlier K1-K2 the TPS potentiometer has the blue/yellow/black straight out the unit and into loom plugs. The K3-K4's on
the kitchen table now have a plug that goes straight into the TPS, colours Red/Pink/Brown and Black/Brown, respective connections.
The (thin) Black/Brown ground goes around JUST the bike sensors, straight into the ECU. Confusingly there's another that splices that further
down the tree from the ECU, but on the other side of the SET... you can guess how I found that out when I pilled the downstream pin the wrong side...
Red is 5V live, straight out the ECU to all sensors. Yellow is 'signal', i.e Vout, changing to Pink/Brown on the loom.
By the way, there's another yellow on that end of the TB's, from the STV. It stays yellow all the way to the ECU.
Anyway, go ahead and play.
GSXR - There really is NO substitute.
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matt_gsxr
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| posted on 27/10/09 at 08:50 AM |
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When it is right you should get around 57 when the throttle is closed and around 225 when wide-open.
Fiddle away, just be careful not to short the live to the earth on the leads from the MS (it might not like it!).
Matt
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stevebubs
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| posted on 27/10/09 at 12:13 PM |
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http://www.locostbuilders.co.uk/photos.php?action=showphoto&pho
to=TSP.jpg
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