Crankshaft position sensor : V-Twin Forum: Harley Davidson Forums
» Sponsors

» Insurance
Go Back   V-Twin Forum : Harley-Davidson Motorcycle Forums > Technical Discussion Forums > Twin-Cam 88" Engine Technical Discussion
New User? Register Forgot Password

Reply
 
LinkBack Thread Tools Display Modes
Old 03-04-2007, 05:08 PM   #1 (permalink)
Lifetime Premium
 
Join Date: Sep 2002
Location: League City TX
Posts: 314
PhilRKC wants to know Dino or Syn?
Question Crankshaft position sensor

It has been some time since i have been to this site. Originally i got a lot of good information and it helped in the purchase of my 2003 Road King Classic.
Since then have enjoyed the bike. Did Texas to Sturgis in 2005 and looking for more of the same.
Anyway, the reason for the thread.
I changed the oil yesterday, the oil filter was VERY tight. As a result all the filter wrenches i had would not get it off, so i used to old fashion method, a screwdriver........ As a result of the damage to the oil filter, the wires to the Crankcase Position Sensor (CPS) were stretched..... possibly damaged.
When the oil change was completed the bike would not fire, it turns over, but not fire. The only difference in this oil change to any others was the stretched wires on the CPS. I have searched multiple locations and could not find the answer to my question.
What should the resistance be when measuring the wires to the CPS. I am getting 0, not knowing exactly how the CPS works, meaning is it normally open or normally closed (or otherwise), i am not sure if "0" resistance is good or bad.

The bike was running fine several hours prior as i took it for a run to warm up the engine and oil.

Any thoughts, or information on what should be the reading when testing the continuity of the CPS circuit, or anything else that may help resolve the problem is appreciated.

Oh, how do i pull the codes on the 2003 FLHRCI, do i need anything special to get this information.

Thanks in advance.

PhilRKC
__________________
2003 FLHRCI (Vivid Black)
The Great State of TX

PhilRKC is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 03-04-2007, 08:39 PM   #2 (permalink)
Registered User
 
Join Date: Nov 2005
Location: northern cal.
Posts: 483
jim t wants to know Dino or Syn?
Sounds like you severed the wires inside the insulation. A new sensor is about $50.00 here. The only electrical malfunction I have had on my bike and it did not go out completly just started running shitty. I can't tell you the ohm value of a functioning sensor but the one I removed reads open and was just functioning poorly. I have spoken with guys that do a lot of long distance riding and they say they always cary a spare. A tip on oil filter removal. When I run into a tight filter I use a large channel -loc plier and it has never failed me or caused any dammage. Cars, bikes, boats et al. Jim
jim t is offline   Reply With Quote
Old 03-05-2007, 08:28 AM   #3 (permalink)
Seasoned Rider
 
Join Date: Mar 2007
Location: Texas
Posts: 40
AmarilloDano wants to know Dino or Syn?
I've come across a bad crank sensor before, it showed open on the ohm meter. The new one showed a minimal resistance, 3 or 5 ohms, if I remember right. After all, it's just a coil. Now don't go counting on my antique memory! It's had over half a century of abuse.

As for oil filters, I bought a nylon strap stlye filter wrench some years ago and haven't come across a filter that could whup me yet. A few that got a might crushed in the process, but they all came off in the end.
AmarilloDano is offline   Reply With Quote
Old 03-05-2007, 10:52 AM   #4 (permalink)
IronButt
 
Join Date: Mar 2003
Location: Ohio
Posts: 601
Ragnar wants to know Dino or Syn?
A screwdriver in the oil filter makes a nice mess, too, doesn't it? Your symptoms are exactly those of a bad sensor. Just replace it. I also agree with the giant channel locks if you don't have the right wrench.

Ragnar
Ragnar is offline   Reply With Quote
Old 03-05-2007, 11:03 AM   #5 (permalink)
IronButt
 
PosseRider's Avatar
 
Join Date: Sep 2006
Location: Ohio
Posts: 884
PosseRider wants to know Dino or Syn?
Aww , but the strap is easier, You just use a rachet to turn. Dont have such a hard time getting that large channel lock in there.
PosseRider is offline   Reply With Quote
Old 03-05-2007, 05:52 PM   #6 (permalink)
Lifetime Premium
 
Join Date: Sep 2002
Location: League City TX
Posts: 314
PhilRKC wants to know Dino or Syn?
Guys,

Thanks for the responses, i had order a new sensor anyway. When something like this goes wrong you just have to look at what you were working on.

What better way to learn more about the bike, less the $50....

Will let you know the outcome.

Thanks again

PhilRKC
__________________
2003 FLHRCI (Vivid Black)
The Great State of TX

PhilRKC is offline   Reply With Quote
Old 03-05-2007, 06:00 PM   #7 (permalink)
IronButt
 
Ride's Avatar
 
Join Date: Dec 2004
Location: Wyoming
Posts: 353
Ride wants to know Dino or Syn?
I just carefully pull my crank position sensor before changing the oil, wrap it in a paper towel and move it out of the way. Check J&P cycles...they make a filter wrench with a cut out in it to work around the crank sensor if you don't want to take it out.

I can tell you that when that sensor decides to quit your not going anywhere. Mine died 70 miles from home and cost me a tow. Lucky for me I had two weeks left on the extended warranty and got all but $100 back.
__________________
If you wanna blend in...take the bus.
Ride is offline   Reply With Quote
Old 03-05-2007, 08:40 PM   #8 (permalink)
FNG :)
 
Join Date: Mar 2007
Location: Tennessee
Posts: 1
fuel wants to know Dino or Syn?
Hello all. I'm new to this forum and I don't own a Harley yet, but I'm looking to buy one soon. But I think I might be able to help out with this problem.

Like jim t said, I also think that you probably broke a wire. You can't check a the crank sensor with an ohm meter. The way to check it is with a digital volt meter. I'm not sure how many wires Harley uses for the sensor, but most sensors use three wires. One is a ground, one is power and the other wire is the signal wire. First thing to check is to see if your getting voltage to the sensor from the ECU (could be anywhere between 5 and 12 volts). Unplug the wires from the sensor and turn on the ignition. Then probe each of the wires to see if there is one of them that has voltage, if not there is a problem with the wires.

If your getting voltage then it could be the ground wire if it has one. If it has one then back probe the ground to see if it has resistance. If it has resistance then more than likely it is the sensor. But to make sure, plug the sensor back up and then you will need to probe the signal wire with the volt meter while you are cranking the motor. The voltage should fluctuate some where between 0.4 and 4 volts. But it could be different voltages, but regardless the voltage should fluctuate.

Good luck.

Joe
fuel is offline   Reply With Quote
Old 03-05-2007, 11:23 PM   #9 (permalink)
IronButt
 
Fourcats's Avatar
 
Join Date: Apr 2005
Location: Longview, Washington
Posts: 1,718
Fourcats wants to know Dino or Syn?
If you run the "codes" it should tell you whats up...
Having experienced the CPS going bad, I carry a spare.
You can take a new oil filter to a auto parts place and get a good {3/8 drive "cup style"} wrench for six bucks, they come in a bunch of sizes.
Fourcats is offline   Reply With Quote
Old 03-06-2007, 08:49 PM   #10 (permalink)
Registered User
 
Join Date: Nov 2005
Location: northern cal.
Posts: 483
jim t wants to know Dino or Syn?
You know, I did that but it doesn't clear the sensor. What I intended on doing is taking my die grinder and cutting a section of the tool off to get clearence. Even with that mod I suspect one would have to be very careful not to break the wires. Jim
jim t is offline   Reply With Quote
Old 03-06-2007, 09:05 PM   #11 (permalink)
IronButt
 
Fourcats's Avatar
 
Join Date: Apr 2005
Location: Longview, Washington
Posts: 1,718
Fourcats wants to know Dino or Syn?
Its easy to pull the CPS {as mentioned} and move it out of the way while changing the filter. Don't over tighten the filter or the screw for the sensor...just snug them up.
Fourcats is offline   Reply With Quote
Old 03-10-2007, 09:33 PM   #12 (permalink)
DILLIGAF
 
berserker's Avatar
 
Join Date: Sep 2003
Location: Straight jacket memories and sedative highs
Posts: 17,659
berserker is still riding a stock bike berserker is still riding a stock bike
I troble shoot elec systems for aliving, 125vdc, I have learned there are no coicidences. I used to tell myself, everything has to die someday, that has never been true. Of course first time for anything.

What about elec manual? I got one but haven't looked at. Hard to thumb through. If this has not reslved it self, by the time I sober up,I will look.

I have nicked mine a few times when chageing oil, so far so good. For $50, change it, one less thing to worry about.
__________________
Lets not turn on each other, unless we have to.
The only thing that counts in the end is power! Naked merciless force! -Ursus
The Devil made me do it the first time, the second time I did it on my own-Waylon
Helmets are like rubbers you know you should wear one, but its so much better when you don't.-Me
Sometimes I think its a sin, when I feel like I am winning when I am losing again.-GL
2001 FLHR, 98"
2007 FLHTCU
berserker is offline   Reply With Quote
Old 04-03-2014, 09:33 PM   #13 (permalink)
Seasoned Rider
 
Roadkingjoey's Avatar
 
Join Date: Sep 2013
Location: Summit MS
Posts: 33
Roadkingjoey wants to know Dino or Syn?
Do you have to take the cover of the motor . Mine has three wires
Roadkingjoey is offline   Reply With Quote
Old 04-03-2014, 10:40 PM   #14 (permalink)
DILLIGAF
 
berserker's Avatar
 
Join Date: Sep 2003
Location: Straight jacket memories and sedative highs
Posts: 17,659
berserker is still riding a stock bike berserker is still riding a stock bike
This thread is 7 years old, so hopefully he got it by now.
__________________
Lets not turn on each other, unless we have to.
The only thing that counts in the end is power! Naked merciless force! -Ursus
The Devil made me do it the first time, the second time I did it on my own-Waylon
Helmets are like rubbers you know you should wear one, but its so much better when you don't.-Me
Sometimes I think its a sin, when I feel like I am winning when I am losing again.-GL
2001 FLHR, 98"
2007 FLHTCU
berserker is offline   Reply With Quote
Old 04-16-2014, 10:59 PM   #15 (permalink)
IronButt
 
Join Date: Jun 2005
Location: Peabody Ma.
Posts: 630
HDTC882000 wants to know Dino or Syn?
Quote:
Originally Posted by Roadkingjoey View Post
Do you have to take the cover of the motor . Mine has three wires
Quote:
Originally Posted by berserker View Post
This thread is 7 years old, so hopefully he got it by now.
poor guy, all he was doing was avoiding starting a new thread..
__________________
2005 FLTRI

NOW IT'S A 120R

V&H Pro Pipe HO
Barnett Scorpion Clutch
HPI 58mm TB
5.3 gps FI
SERT, Tuned by Big Boyz

Seacoast HD Dyno #'s

133 hp
127 ft lbs tq


HDTC882000 is online now   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 08:57 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
(C)2001-2012 V-twinForum.com All Rights Reserved (C)2001- V-twinForum.com All Rights Reserved
Motorcycle News, Videos and Reviews
Honda Grom Forum Harley Davidson Forum Honda 600RR Kawasaki Forum Yamaha R6 Forum Yamaha FZ-09 Forum
1199 Panigale Forum Roadglide Forum Honda CBR1000 Forum Vulcan Forum Yamaha R1 Forum Yamaha R3 Forum
Ducati Monster Forum Harley Forums Honda CBR250R Forum ZX10R Forum Star Raider Forum Yamaha Viking Forum
Suzuki GSXR Forum V-Rod Forums Honda Shadow Forum Kawasaki Motorcycle Forum Star Warrior Forum KTM Duke 390 Forum
SV650 Forum BMW S1000RR Forum Honda Fury Forum Kawasaki Versys Forum Drag Racing Forum Ducati 899 Panigale Forum
Suzuki V-Strom BMW K1600 Triumph Forum Victory Forums Sportbikes BMW NineT Forum
Volusia Forum BMW F800 Forum Triumph 675 Forum MV Agusta Forum HD Street Forum Suzuki GW250 Forum
Yamaha Motorcycles Victory Gunner Forum Honda Vultus Forum HD LiveWire Forum Ninja H2 Forum