Power Commander PC III wiring to the TPS - Ducati.ms

**cassos** · Oct 2nd, 2009, 12:34 am

I think I am also going to buy the PCIII. Looking at the install guide of the PCIII for the Hypermotard, they seem to have done a clean job with connectors without cutting any stock wires, however why did they NOT also plug nicely at the TPS connector cleanly instead of that:
9 Locate the stock Throttle Position Sensor. This sensor is located on the left side of the throttle bodies.
10 Cut a 1” slit in the sheathing for the TPS harness. This allows access to the wires.
11 Using the supplied wire tap crimp the ORANGE wire (Fig. G).
12 Connect the GREY wire from the PCIII harness to the wire tap (Fig. G).

GMP · Oct 2nd, 2009, 7:28 am

Thats real ghetto to me. I don't know about Cali where you live but here where rain is hard to avoid unless everything is sealed up good your asking for trouble. Before I added one of those, I'd run the bike on a dyno or ride it with a wideband sensor and get an AFR curve, then have the ECU remapped like Brainfry did. Thats a great solutiom IMO, keeps things simple and inherently more reliable.

orion8419 · Oct 2nd, 2009, 8:53 am

yeah i don't know why they do that. there must be a reason as its like that with all the bikes i've seen. defiantly get it tuned on a dyno. it will run much better then the generic maps they supply. when i first put one on my gsxr600 i fooled with the maps it gave you untill i found one i like. found out it wasn't adding any power over stock and i had a bunch of mods. took it to the dyno guy and he got 11hp over stock out of it and it ran much much better

hyperdookie · Oct 2nd, 2009, 10:04 am

That wire tap is very cheesy.I wouldn't use one to install a neon licence plate frame on an 86' Hyundai let alone for this application. With a little time and ingenuity, it could be done cleanly(preferably soldered).

**cassos** · Oct 2nd, 2009, 10:42 am

No worries about dyno runs to get the perfect maps, we have great local dynojet support with at least John Nichols, Kyle Racing, and Leo Vinci all certifed dynojet dealers and equipped to flash the perfect maps to your PCIII from a set of tune ups and dyno runs.

My real question is indeed about the crappy TPS wire tap. There are many guys here with the PCII installed (Todd, Alex and way more), I would like to see how it was done on their bike.

I also would like to understand why they did not provide an inline connector based Y wiring at the TPS connector (where ever that is), as they did for altering the injector's signal. Perhaps such TPS connector does not exist, perhaps the wire would be too long, perhaps signal loss????

Akkutz · Oct 2nd, 2009, 11:17 am

I've installed PC on Aprilia and Ducati, that is about the only way to tie into the TPS... What would you suggest? Add a whole new wiring harness for each TPS??

**cassos** · Oct 2nd, 2009, 11:29 am

Quote:

Originally Posted by Akkutz

I've installed PC on Aprilia and Ducati, that is about the only way to tie into the TPS... What would you suggest? Add a whole new wiring harness for each TPS??

Of course not a new harness

But I imagine that TPS wire goes to a connector somewhere at which point one could make a Y cable with a female and male versions of that connector to insert inline, and a TPS wire going to the PCIII

But again, I did not check the harness wiring to find out where such connector would be, perhaps it simply does not exist and the TPS wire may go straight from TPS sensor on one side, to the ECU and whatever on the other side

GMP · Oct 2nd, 2009, 12:22 pm

I suspect its all about cost. While all the fuel injector connectors I've seen are the same, others like the TPS are not. While its a standard type connector, its not the same on all bikes.

I'd track that connector down, get a couple, and make a "Y" cable.

**cassos** · Oct 2nd, 2009, 12:34 pm

Quote:

Originally Posted by GMP

I suspect its all about cost. While all the fuel injector connectors I've seen are the same, others like the TPS are not. While its a standard type connector, its not the same on all bikes.

I'd track that connector down, get a couple, and make a "Y" cable.

My point exactly.

John, here is a new project for your friend Bernard now that he masters the turn signal connectors

I bet most people with PCIII would be * very intersted * not to touch any of the stock wires...

dave2riff · Oct 2nd, 2009, 1:30 pm

I agree, the tapping into the TPS wire and sheathing was a disappointing
weakness in an otherwise clean installation for the PCIII. The 3M crimp
taps have proven to be reliable for quite a few years now, but to me
it does seem a little hokey.

Since the Throttle Position Sensor must
work accurately down at fractions of a volt (for idle throttle plate position),
I'm wondering if the added contact resistance of stacking connectors might
have been a concern, possibly requiring a TPS reset on the bike, or even
adding low level noise on the TPS signal under vibration. Just speculating
here... (but one would think a high quality connector would be OK to insert
in line as was mentioned).