EITMS & Cooling Fans
Thread Starter
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Road Warrior
Joined: Mar 2012
Posts: 1,522
Likes: 351
From: Holly Springs, North Carolina
EITMS & Cooling Fans
Hey folks, saw this question on a Harley Ultra Limited forum & no one gave a clear answer. If you have the updated water pump or even the original OEM pump, if you have EITMS Disabled,
do the fans still kick on when they are supposed to? I have the updated pump, I have EITMS Disabled, & I never hear the fans come on. I have tested them & I know they work. Just curious to the EITMS setting & it's effects.
Thanks,
do the fans still kick on when they are supposed to? I have the updated pump, I have EITMS Disabled, & I never hear the fans come on. I have tested them & I know they work. Just curious to the EITMS setting & it's effects.
Thanks,
Grand HDF Member
Joined: Oct 2012
Posts: 3,758
Likes: 196
From: Boise, ID
Disclaimer: I don't know for sure...
Cooling fans should be on a separate activating system. Based on coolant temps not the EITMS. It would defeat the purpose of having fans if they do not help cool down the coolant. They are there for that purpose & that purpose only. Just as a fan activates on a car when the temps require it.
Cooling fans should be on a separate activating system. Based on coolant temps not the EITMS. It would defeat the purpose of having fans if they do not help cool down the coolant. They are there for that purpose & that purpose only. Just as a fan activates on a car when the temps require it.
Grand HDF Member
Joined: May 2008
Posts: 4,585
Likes: 673
From: Rolla
Unless the coolant temp reaches the fan "on" threshold, the fan won't come on.
Under normal riding conditions, the fans will rarely (if ever) come on.
The only time my fans ever come on is if I get stuck in a long line of traffic.
Just sitting at a normal red light cycle isn't long enough for it to get hot enough to kick them on.
I purposely let it sit and idle in front of my garage, just to see when the fans kicked on.
They did, but it took longer than I thought it would.
From page C.2 in the 2015 service manual:
Table C-3 Coolant Temperatures
Thermostat initially opens: 165°F
Thermostat fully open: 190°F
Engine Temperature lamp: 266°F
Antifreeze protection: -34°F
Table C-4 Fan Operation
On (below 15 mph): 221°F
Off (below 15 mph): 203°F
On (above 15 mph): 244°F
Off (above 15 mph): 230°F
Under normal riding conditions, the fans will rarely (if ever) come on.
The only time my fans ever come on is if I get stuck in a long line of traffic.
Just sitting at a normal red light cycle isn't long enough for it to get hot enough to kick them on.
I purposely let it sit and idle in front of my garage, just to see when the fans kicked on.
They did, but it took longer than I thought it would.
From page C.2 in the 2015 service manual:
Table C-3 Coolant Temperatures
Thermostat initially opens: 165°F
Thermostat fully open: 190°F
Engine Temperature lamp: 266°F
Antifreeze protection: -34°F
Table C-4 Fan Operation
On (below 15 mph): 221°F
Off (below 15 mph): 203°F
On (above 15 mph): 244°F
Off (above 15 mph): 230°F
Thread Starter
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Road Warrior
Joined: Mar 2012
Posts: 1,522
Likes: 351
From: Holly Springs, North Carolina
Unless the coolant temp reaches the fan "on" threshold, the fan won't come on.
Under normal riding conditions, the fans will rarely (if ever) come on.
The only time my fans ever come on is if I get stuck in a long line of traffic.
Just sitting at a normal red light cycle isn't long enough for it to get hot enough to kick them on.
I purposely let it sit and idle in front of my garage, just to see when the fans kicked on.
They did, but it took longer than I thought it would.
From page C.2 in the 2015 service manual:
Table C-3 Coolant Temperatures
Thermostat initially opens: 165°F
Thermostat fully open: 190°F
Engine Temperature lamp: 266°F
Antifreeze protection: -34°F
Table C-4 Fan Operation
On (below 15 mph): 221°F
Off (below 15 mph): 203°F
On (above 15 mph): 244°F
Off (above 15 mph): 230°F
Under normal riding conditions, the fans will rarely (if ever) come on.
The only time my fans ever come on is if I get stuck in a long line of traffic.
Just sitting at a normal red light cycle isn't long enough for it to get hot enough to kick them on.
I purposely let it sit and idle in front of my garage, just to see when the fans kicked on.
They did, but it took longer than I thought it would.
From page C.2 in the 2015 service manual:
Table C-3 Coolant Temperatures
Thermostat initially opens: 165°F
Thermostat fully open: 190°F
Engine Temperature lamp: 266°F
Antifreeze protection: -34°F
Table C-4 Fan Operation
On (below 15 mph): 221°F
Off (below 15 mph): 203°F
On (above 15 mph): 244°F
Off (above 15 mph): 230°F
Cruiser
Joined: Apr 2018
Posts: 197
Likes: 23
From: Chicago
I also have it disabled on my 2014 FLHTK and the fans do come on but as others have said, it takes longer than expected.
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Club Member
Joined: Aug 2008
Posts: 21,763
Likes: 22,964
From: North Carolina
Hey folks, saw this question on a Harley Ultra Limited forum & no one gave a clear answer. If you have the updated water pump or even the original OEM pump, if you have EITMS Disabled,
do the fans still kick on when they are supposed to? I have the updated pump, I have EITMS Disabled, & I never hear the fans come on. I have tested them & I know they work. Just curious to the EITMS setting & it's effects.
Thanks,
do the fans still kick on when they are supposed to? I have the updated pump, I have EITMS Disabled, & I never hear the fans come on. I have tested them & I know they work. Just curious to the EITMS setting & it's effects.
Thanks,
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Road Warrior
Joined: Sep 2014
Posts: 1,271
Likes: 246
From: Columbia SC
EITMS is solely for rider comfort
Thread Starter
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Road Warrior
Joined: Mar 2012
Posts: 1,522
Likes: 351
From: Holly Springs, North Carolina
Yes, I know what the fans are for & what the EITMS for. That wasn't the subject of my question.