engine temp management system
Club Member
Joined: Apr 2013
Posts: 7,675
Likes: 8,401
From: Utah
As posted earlier, this is from the 2015 Electrical Diagnostic manual, pg 6-2, the most current I believe.
On Pg 6-73 under Cooling Relay Diagnostics : Description and Operation
the manual continues to show that the fans are controlled by a thermistor that monitors coolant temp. Fig B-16 Schematic shows the same, ECM output at 78A-3 #15 Coolant temp.
The 2014 owners manual states the same but the 2015 owners manual mentions ambient temp but no specific temp.
I'll see if I can get an answer tomorrow, it would be nice to think the manual was up to date.
Club Member
Joined: Apr 2013
Posts: 7,675
Likes: 8,401
From: Utah
Must have been up too late last night to have brought the fans into question.....
Called the HD Tech line and they confirmed that the AAT > 80* will activate EITMS on Faired Models, Non-Faired continue to use ET > 288*f
The tech said they will make note of the omission of the AAT control in the Manuals.
Called the HD Tech line and they confirmed that the AAT > 80* will activate EITMS on Faired Models, Non-Faired continue to use ET > 288*f
The tech said they will make note of the omission of the AAT control in the Manuals.
Club Member
Joined: Jan 2007
Posts: 3,554
Likes: 1,932
From: NE Florida
Picked up my 15 SGS last week and I saw in the Info screen it's disabled. I haven't turned it on but maybe I will before leaving work today. I didn't realized until I saw that screen that it could be turned on and off.
Cruiser
Joined: Apr 2009
Posts: 228
Likes: 1
From: Shelby, N.C.
I founded out pretty quick that my 14 was different than my 09. Every time I stopped it ran rough. Disabled it!! I have my own heat management, If I get stuck and sitting too long I cut the engine off. Works great.
Road Master
Joined: Oct 2007
Posts: 925
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From: Memphis, TN via NoVA
Air cooled = Air moving
Air moving = Bike moving
Bike moving = Staying off congested roads
Staying off congested roads = Better ride!!!!
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Stage III
Joined: May 2015
Posts: 3
Likes: 0
From: Virginia
Aat>80
AAT>80, that's the key to all of this. I've had the rear cylinder drop out at engine temps just over 200. Never saw anything stating that AAT>80 or ETS>280 would trigger the rear cylinder drop out. I only saw data referencing ETS>300.