DTC trouble code PO117

[No Cents]

PO117 is...engine temperature sensor voltage low.
anyone one had this code before. I put a brand new battery in today and the bike wouldn't run. I checked for spark and I had spark. I checked the fuses and all were good. I unplugged the IAC connector off the t/body four or five times...still wouldn't start.
I checked the speedo DTC codes and it showed the PO117 code.
I google searched that code and seen it was the engine temp sensor. I wiggled the connector on it a few times and the bike fired up...but it didn't idle as normal in the cold start up mode. It idled around 1100-1200 rpm's cold...which it usually idles higher on a cold start up. I went back to the speedo DTC's and cleared the PO117 code. I started the bike back up and the check engine light stayed on. I went back to the speedo DTC's and the PO117 code was back again.
Any thoughts?

[Bike31]

Did you move the ECM or any of its plug in connections at battery changeout? Find the ECM plug that carries the ETS (wiring diagram elsewhere here) and reestablish a good connection. Make sure the sensor wiring isn't compromised.

[ViennaHog]

Two options: sensor faulty or wiring short/open incoming or outgoing. EDM required to trace this

[sfmichael]

 

[No Cents]

I read today to pull the ET sensors plug in connector off. Bend a small paper clip into a U...and insert it into the clip connector. Turn the ignition switch on and test the voltage from the paper clip to the battery ground. It should read 5 volts. If it reads lower...trace the wiring backward to find the problem. If it reads 5 volts...the Engine Temperature Sensor is bad.
I'll give this a try when I get home from work today.

[ViennaHog]

I read today to pull the ET sensors plug in connector off. Bend a small paper clip into a U...and insert it into the clip connector. Turn the ignition switch on and test the voltage from the paper clip to the battery ground. It should read 5 volts. If it reads lower...trace the wiring backward to find the problem. If it reads 5 volts...the Engine Temperature Sensor is bad.
I'll give this a try when I get home from work today.

yes, easiest way to do it. Check the supply voltage from the ECM to the ET first to make sure you interpret your finding with the clip inserted correctly

[No Cents]

I guess I've found my problem. I put two small paper clips into the engine temperature connector and had 5.1 volts...so I have good voltage to the sensor...I'm glad of that. I hate chasing bad wiring. 
  I checked for resistance across the two pins on the sensor and it had "zero/none"...and from what I could find searching on the net...it should have an ohm's reading of between 2K-5K ohms.

[Scotty]

900-10,000 Ohms with the vehicle and sensor at room temperature

[No Cents]

can the sensor be tested off the bike...or does it have to stay screwed into the head?
off the bike I get an ohm reading of 0.0 to 0.1 at room temperature.

[rbabos]

can the sensor be tested off the bike...or does it have to stay screwed into the head?
off the bike I get an ohm reading of 0.0 to 0.1 at room temperature.

Yes, and it sounds pooched.
Ron

[No Cents]

 
thanks Ron...I appreciate it!
I plan on testing the new sensor when it gets here...to compare against this one. I bought this ET sensor new when I built this 124.
Weird that it went bad so fast 

[rbabos]

thanks Ron...I appreciate it!
I plan on testing the new sensor when it gets here...to compare against this one. I bought this ET sensor new when I built this 124.
Weird that it went bad so fast 

Yes that blows considering you made the effort to start with a fresh one.
Ron

[Scotty]

With multimeter set at 20k Ω I get 2.23 Ω tested of the bike.

[rbabos]

With multimeter set at 20k Ω I get 2.23 Ω tested of the bike.

That's close to what I remember when I tested one on the bench. Damn things are really temp sensitive and readings change quite a bit.
Ron

[Ohio HD]

thanks Ron...I appreciate it!
I plan on testing the new sensor when it gets here...to compare against this one. I bought this ET sensor new when I built this 124.
Weird that it went bad so fast 

That old temp sensor is working just great!   

[No Cents]

thanks Ron...I appreciate it!
I plan on testing the new sensor when it gets here...to compare against this one. I bought this ET sensor new when I built this 124.
Weird that it went bad so fast 

That old temp sensor is working just great!   

I tested the sensor at home with my digital Fluke meter and got 0.0- 0.1 readings. I took it to work with me today and used a digital milli-meter on it set at the 20 ohm scale. It read 0.0- 0.1 again.

Brian....go ahead and rub it in  ...I know that 117"er has good karma with it! It was an excellent engine when I had it...and I haven't heard you complain about it yet...so I figure it's making you smile like it did me...every time I rode it 
I'm glad it's winter at least when the sensor decided to take a crap and not in the spring...it makes it a little easier to deal with 

[Ohio HD]

thanks Ron...I appreciate it!
I plan on testing the new sensor when it gets here...to compare against this one. I bought this ET sensor new when I built this 124.
Weird that it went bad so fast 

That old temp sensor is working just great!   

I tested the sensor at home with my digital Fluke meter and got 0.0- 0.1 readings. I took it to work with me today and used a digital milli-meter on it set at the 20 ohm scale. It read 0.0- 0.1 again.

Brian....go ahead and rub it in  ...I know that 117"er has good karma with it! It was an excellent engine when I had it...and I haven't heard you complain about it yet...so I figure it's making you smile like it did me...every time I rode it 
I'm glad it's winter at least when the sensor decided to take a crap and not in the spring...it makes it a little easier to deal with 

Well... if it weren't winter, I'd have brought you a temp sensor. I have a spare here.   117 is doing OK, she might be getting tired of me putting the hammer on her...  we'll see though.   

[No Cents]

 
she's a glutton for punishment!
glad to hear she is doing OK

[No Cents]

my new engine temperature sensor arrived today. I tested it on the 20 ohm scale and it showed a steady 5.0 ohm's...the bad one tested 0.0- 0.1.
I installed it and it allowed me clear the PO117 DTC code on the speedo this time.
It fired right up with the new "Big Crank" battery and it was only 15* outside. It idled thru the cold start up perfectly.
Now if we can get rid of all this damn snow and warm up a little. Another 3-5" of snow is forecasted and it's only a few miles away according to the radar 
Thanks for the help men...I appreciate it.