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Perfect PCIII install

75K views 290 replies 139 participants last post by  Roldas  
#1 ·
Updated 8-04-06

This install covers ALL years of Warriors to date.

If your Warrior cuts out, has dead spots, a wacky throttle response off idle or a dyno tuner that goes nuts trying to get you a good custom map follow these instructions. It will fix 99% of these issues unless you have a broken CPS.


Many people have experienced that the PCIII setup as described in its manual is not perfect. The TPS read out in particular is a problem. Instead of a steady TPS signal the PCIII (regular and USB) jumps around pretty wild. This causes not only shops to do custom maps to take a lot longer to get it right but can also lead to less than perfect throttle response of your Warrior.

The solution is very simple and is highly recommended for EVERY Warrior PCIII owner.

IMPORTANT: When looking for the right wires please make sure that the first color is the base color and the second on is the strip on it. So black/blue for example is a black wire with a blue strip.

Start with the gray PCIII TPS hookup wire: Pull it back through the insulation to have it come out pretty close of the PCIII. Depending on where you install the PCIII you only need a few inches of gray wire. Check first before you cut it too short.
Now locate the solid yellow wire that runs into the ECU. Be aware that there are several wires that have a least part yellow marking on them. There is only one solid yellow wire (it might have some gold markers on it as all the wires).
Cut that wire, take the insulation off both ends, twist the gray wire around one of those ends, push a piece of shrink tubing over the other yellow end and solder the connection back together. Last but not least push the shrink tubing back over the solder joint and heat shrink it.
The second connection that is even more important is the PCIII digital ground. The Warrior uses a digital ground wire for all its sensors to reduce noise. The PCIII comes with a digital ground wire but unfortunately as it is sold it is connected to regular ground. When you pull back the insulation of the PCIII ground wire you will find two wires ending at the ground connector: One is black (regular ground) and the other one is black/white (digital ground). Cut the black/white wire and pull it back to the same exit you used to run the gray wire. The black/white wire will need to be approximately the same length as the gray wire. Now find the black/blue wire that runs into the ECU. There is only one.
Do the same thing as before but now splice the black/white (PCIII) wire into the black/blue (ECU) wire and heat shrink the solder joint.
Install the PCIII in its final location and you are done.

Now when you hookup a laptop of dyno computer to the PCIII the TPS signal on a running Warrior should be rock steady and the bike should run cleaner and very crisp. If not you might adjust the map you are currently running.

Hope this helps!

Oliver
 
#137 ·
oliver , iv been reading all the questions on this tps signal , my question for you is , my midnight 05 with vh longshots and a pc3 i installed last summer worked like a champ , i also istalled the ais plates the same time . now that im useing the bike again after winter its not running as good as last summer . im backfireing quite a bid , and when i get the rpms up high it acts like its breaking up or hitting the rev limiter . its hard to tell if its a lean pop or running to rich pop . i pulled the plugs and they look great . at the moment i still have the pc3 hooked up with the scotch lock on the tps wire , so to you dose this seem like my popping problem , or do you think someting else, thanks for your help biker b
 
#141 ·
For those of you who have wondered if Dynojet is aware of the digital ground issue, the answer is yes, when I took my bike in for the custom map the tech couldn't get a steady tps signal. He called Dyno jet and was told to hook up the ground as covered in this post. I had not done the perfect install before going in since my bike ran fine for over a year without it. It has been done now.
 
#142 ·
I would even call it a product defect/shortcomming. The digital ground is available at the TPS sensor. Instead of the crimp on connector they should have added 1 male and 1 female connector to go in between the TPS and the stock wiring, just like for the injectors. DIgital Ground is there and a good TPS connection could have been made AND that thing would be true plug and play.
The PCIII on the Roadliner/Startoliner has this issue taken care off. You also don't need a 9V adapter as the hookup get 12V switched power form the bikes wiring.
 
#143 ·
I installed the PCIII yesterday and just want to say thanks Oliver for info on the prefect install. Also thanks to Jody/amospro for the map it's running much better than the tunning I had done to the ECU. I could not get enough lack to solder the yellow wire back together so I just added a short piece and soldered in. BTW for you guys that maybe a little color blind like myself, the the Black/Green wire is NOT the Black/Blue. Keep looking. Cu$tom map is in the near future.
 
#149 ·
Thanks Frankenstein,
did the perfect install on my 06' today, after seein a couple of posts about problem with 06' installs I was kinda bummed after I had already ordered it online. No worries it turned out perfect, runs smooth throughout. I just loaded one of the maps off the PC as I still haven't decided on pipes yet. It had a slip on muffler on the stock header when I bought it. I've installed thr BAK. Maybe I'll fool around with some other maps after I've put some more seat time on this one. It's so easy to play with. Anyway sure am glad I found this forum. Thanks again, good luck and ride on.
 
#151 ·
Ok...I think or at least I'm pretty sure that I understand what wires to cut and splice together. I will probably do this "Perfect Install" this weekend and see what it does for my bike. I have an 05' Midnight Warrior that came with a PCIII USB already installed. I'm sure it's not a "Perfect Install"...So I'll definitely do the install since what I have read here so far, it sounds like it is the mod to do, if you have the PCIII.

One question, though...And I hope someone can help me out with the answer. What is this thing about setting the TPS to zero after you do the "Perfect Install"? Or am I reading something different or that doesn't apply?

Any help with this question would be greatly appreciated...

Thanks!

Mark aka Mad Man