Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[stealth]

Anyone know if the fans are supposed to run together, or are they separately controlled? My right fan does not run nearly as much as the left. I only see one temp sensor, its in the bottom of the left radiator according to the service manual.

[grc]

My understanding is that with the stock calibration from Harley the fans are staggered, as in the first fan kicks on at one temperature, then the second fan joins in when the temperature rises to a second level.  There's a thread around here somewhere in which Steve Cole, the TTS MasterTune expert, explained how they are set up from Harley, and how he sets them up differently in the TTS calibrations (maps).

Btw, having the fans staggered like that isn't unusual.  Many cars have been set up that way from the factory, with two radiator fans and the secondary only runs under certain conditions.

Jerry

Update:  It seems I have that backward, according to Steve Cole.  Harley has them set up to run together, but the TTS is set up to have them run staggered, with the left coming on first and the right only coming on if the temperature continues to go up.  Sorry about the bad info.

[HOGMIKE]

FYI:
I believe fans are set from the factory at
L
98 on
91 off
R
102 on
91 off

I set mine at
L
85 on
90 off
R
95 on
90 off


centigrade of course.
Left fan is the primary one.

They seem do do a fine job at these settings and I have my ETIMS "off".
Works for me.
 

[grc]

Mike, take another look at your post, I think you got a typo on the left fan.  Should be 95 on and 90 off instead of 85 on and 90 off if I'm not mistaken.

Jerry

[HOGMIKE]

Right you are~

[stealth]

Sorry I ignored your responses, I was on the road for a couple weeks. I appreciate the information you all provided. What is your source for the stock setup, TTS? I have a TTS, but I have someone else do the actual tuning, Doc's Performance in Minneola, Fl. He did not do anything with the fans to my knowledge, so I guess I should ask him if he can.

I actually had a bad fan and the dealer replaced it before my trip. The new one runs more, but still on their own schedule as my 2 week ride proved and your replies indicate. The dealer told me the fans are both supposed to run at the same time, which is apparently not true. I did not think anything about the fans being programmable. Thanks, I think I will take your advice and change the settings. 

[Sarhan]

Are these number C or F ?? Is there way to test the fans if they are operating.

Have noticed that my friend ultra The ETIMS kicks on before the fans? Is that normal..

Thanks

Sarhan

[grc]

Are these number C or F ?? Is there way to test the fans if they are operating.

Have noticed that my friend ultra The ETIMS kicks on before the fans? Is that normal..

Thanks

Sarhan

Those numbers are Celcius.  Yes, you can test the fans easily, the procedure is in the tech tip I'll attach to this post on page 3, highlighted in yellow.  And the EITMS system on the new models is triggered by ambient air temperature of 80°F or more, and is no longer triggered by the engine temperature.  So yes, if you have the EITMS enabled and the outside air temp is 80°F or more, when you come to a stop the rear cylinder will shut down.  So this will often happen long before the coolant gets hot enough to turn on the fans.

Jerry

[BigLew55]

.... And the EITMS system on the new models is triggered by ambient air temperature of 80°F or more, and is no longer triggered by the engine temperature.  ....
Jerry

Jerry, this is correct, but, I believe, only for the new Twin-Cooled models, not all new models. 

[grc]

Jerry, this is correct, but, I believe, only for the new Twin-Cooled models, not all new models.

You're right Lew.  This is the way Harley explained it in one of their service bulletins.  Leave it to H-D to muddy the whole thing by referring to model designations rather than just saying Twin Cooled and not Twin Cooled:
----------------------------------------------------------------
M-1351                Service Bulletin               September 17, 2013
 
EITMS does not operate within the first four minutes after starting the
engine. 
 
Activation:
 
•Touring (except FLHR, FLHRC, FLHRCVO, FLHRSE) and FLHTCUTG: 
AAT sensor exceeds 80°F (27°C).
 
•FLHR, FLHRC, FLHRCVO, FLHP and FLHTP: ET sensor exceeds 288°F
-----------------------------------------------------------------

ET = Engine Temperature
AAT = Ambient Air Temperature

Jerry

[Sarhan]

Thank you Jerry, this explain a lots of things

[RonandJanet]

I may have missed this but how to adjust the temp setting to turn the fans on and off?

[grc]

I'm not sure what other tuning systems have the capability to adjust those settings, the only one I've seen mentioned so far is the TTS.  The settings are in the ECM and not normally adjustable.

Jerry

[skreminegul07]

You're right Lew.  This is the way Harley explained it in one of their service bulletins.  Leave it to H-D to muddy the whole thing by referring to model designations rather than just saying Twin Cooled and not Twin Cooled:
----------------------------------------------------------------
M-1351                Service Bulletin               September 17, 2013
 
EITMS does not operate within the first four minutes after starting the
engine. 
 
Activation:
 
•Touring (except FLHR, FLHRC, FLHRCVO, FLHRSE) and FLHTCUTG: 
AAT sensor exceeds 80°F (27°C).
 
•FLHR, FLHRC, FLHRCVO, FLHP and FLHTP: ET sensor exceeds 288°F
-----------------------------------------------------------------

ET = Engine Temperature
AAT = Ambient Air Temperature

Jerry

Where does my FLHXS fit?

[grc]

Where does my FLHXS fit?

That bulletin came out shortly after the launch of the 2014 models, so any changes to model designations for 2015 wouldn't be there.  Notice that they didn't mention the FLHX either, which was in the 2014 lineup.  Another Harley OOPS.  It would have been much easier and less confusing if they had just said that all Twin Cooled bikes use ambient air temperature, and all others use engine temperature.  That's why I was poking fun at them in my earlier post.

Since your Street Glide Special doesn't have Twin Cooling, your EITMS would be triggered by engine temperature.

Jerry