| Author | Message | ||
     Shawns |
What is the normal reading for he AT? Mine starts at -5 degrees and then goes to 78 and stays there for the ride. | ||
| Froggy |
Normal reading would be it matching the outside air temperature. The only time it is truly accurate is right at startup, as the second the fans kick on they start blowing hot air on the sensor giving higher readings. If yours is reading -5° in August in New York, regardless if it is Celsius or Fahrenheit, something is wrong, I'd get the sensor replaced. | ||
| Shawns |
Thats what I figured. Is HD the only place to get one? I have heard that you can replace it with a ford IAT sensor. | ||
| Froggy |
It is a common automotive part, if you brought it to Autozone or similar shop they could match it up. Worst comes to worst it is $12.33 at a Harley shop. http://www.americansportbike.com/shoponline/ccp0-p rodshow/17503.html | ||
| Shawns |
Popped it out and it doesn't meter......I'm going with time to replace. | ||
| Hybridmomentspass |
"The only time it is truly accurate is right at startup" i disagree - ive noticed that if im consistently riding 50mph+ for a few miles then it'll read the same as weather channel and local temp gauges and for reading -5....wow. ive seen 130 on it (at a light in traffic), and ive seen 20s, but never negative five ha | ||
| Shawns |
Yep.... every startup. Just changed it with a sensor from Autozone part#su2004. Exact match. When I turn on the key it reads the correct temp now. | ||
| Stirz007 |
Since the IAT is in the inlet snorkel, above the front exhaust header, it is generally only "accurate" at start-up. (BTW, a good way to check your sensor is that Ambient and Coolant temps should be virtually identical at cold start-up, like after sitting overnight). Comparing IAT temps to bank signs, etc., as you go down the road should not considered very accurate, as signs are often wrong, temp over roadway is usually hotter than the shaded bank thermometer, etc. Thanks for posting Autozone equivalent - curious as to what the "car" applications are. Please post in Knowledge Vault the part number cross-reference. (Message edited by Stirz007 on August 21, 2013) | ||
| Shawns |
I'm just glad mine isn't reading -5 degrees at startup now. | ||
| Hybridmomentspass |
is the weather channel and local news reports accurate? alright.... maybe its different in NC, but if im cruising at normal speeds (45+) mine reads the same as TWC/local reports/time-temp signs and thats good enough for me also, at least on mine - at start up it doesnt show CT until it trips 150*, just reads "COLD" | ||
| Stwings |
Before you spend money, try disconnecting/reconnecting the battery. I've had electrical gremlins that were resolved by doing this, ie incorrect AT as well as security mode. | ||
| Northernyankee |
AT on the cluster is kind of confusing...its not Ambient Temp, its Air Temp and really Intake Air Temp. Which is used by the ECU for proper fueling...it was discussed here before when someone wanted to move it to some other location thinking he was getting a false reading. I will see if I can find the thread. | ||
| Northernyankee |
Here it is...its a good read http://www.badweatherbikers.com/buell/messages/290 431/558128.html | ||
| Shawns |
Mine was definately bad. The sensor didn't even meter. The new one does | ||
| Sir_wadsalot |
It's a question of semantics.... It's called "Ambient Temp", because it's measuring the air temperature, plus road heat and the heat being dumped in from the fans & header. "Air temp" generally refers to the actual temperature of the air outside, and nothing else. They would have to put a sensor on the tail or the top of the wind screen to get an accurate air temperature reading, just to have a readout on the dash for the rider. When you start the bike, it is actually reading the air temperature, as soon as the header heats up though.... That's why it's called "Ambient" in the display, and not "Air". Of course you could easily swap "Ambient" for "Air" in any number of settings and it's the same thing. That's why (as in the above referenced thread) it doesn't matter if you move the sensor, because the engine's still getting the same hot air. You would have to reroute the snorkel itself to cold air, and then remount the sensor there. The "definition" of ambient temp is basically room temperature....but in say, a server farm setting, you can't just set a room to a temp setting and walk away. The "room temp" may be 73F, but once you kick on the servers, it's going to be higher, and it's going to vary a great deal between the hot side of the racks and the cold side. "Ambient" as a technical term is the average of these temperature gradients at the measured point. An "air temp" of 70F, combined with shed heat from the servers may create an ambient temp of 80F......just like an "air temp" of 95F sitting in DC traffic with the fans screaming, and heat radiating off the pavement, creates an "ambient temp" of 110-115F. Semantics...it's all just hot air. | ||
| Oldog |
perhaps IAT is better and it stands for intake air temperature. | ||
| Stwings |
Mine will read pretty close to actual air temperature while I'm moving at around freeway speeds. It will read higher at slower speeds or if I get stuck behind a slower vehicle. Of course stop lights we all know!!! |
