outside temp.
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Senior User
Joined: Nov 2007
Posts: 494
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From: Guelph
outside temp.
Hi everyone. I am usly over on the fatfender side of this site. But need a little help with my daily driver. I have a 02 f150. The outside temp on the upper display always show a way different temp. then what it is. Is there a sensor thats out of whack? Thanks
Tuned
Joined: Nov 2004
Posts: 423
Likes: 8
The sensor is mounted to the underside of the top of the radiator support behind the grill. You take the plastic radiator cover filler piece off to get to it. I bought a new sensor, and it didn't fix mine. It still reads about 30deg. low. (Yes it's set to F) Fortunately, I was able to return it. It was abotu $80 at O'Reilleys. I haven't had time to deal with it, so don't have a clue as to what else it could be. hopefully someone else might have a suggestion.
Tuned
Joined: Nov 2004
Posts: 423
Likes: 8
Anyone know what else might cause the temperature to not read correctly? I actually swapped my consoles guts out with one I had from an explorer, and have a tough time believing both displays are bad. Is there anything between the sensor and display? a resistor maybe?
Tuned
Joined: Nov 2004
Posts: 423
Likes: 8
Thanks! Figured someone would have a schematic for it.
Not being an electrical guru, Is that the symbol for a resister in the console labeled VREF?
It appears there is something in the console there. Maybe I do have two bad consoles.
Not being an electrical guru, Is that the symbol for a resister in the console labeled VREF?
It appears there is something in the console there. Maybe I do have two bad consoles.
Postmaster
Joined: May 2003
Posts: 3,310
Likes: 9
From: E.Lincoln County, NC
VREF = Reference Voltage. A dedicated circuit that provides an approximately 5.0 volt signal used as a reference by certain sensors.
Temperature, Outside Air
The thermometer sensor (15A022) is attached to the radiator frame behind the grille. The temperature can be displayed in Celsius or Fahrenheit by pressing the MODE switch.
If the outside temperature falls below 3.3°C (38°F), the display will alternate from "ICE" to the outside temperature at a two second rate for one minute.
The outside air temperature reading can be affected by engine heat when the vehicle is idling or has been off for less than two hours. The compass and thermometer (19A548) will limit the increase of the displayed temperature to one degree per minute at very low speeds or immediately after the ignition is turned on. After two minutes at a sustained speed of at least 53 km/h (33 mph), effects of engine heat are minimal and the compass will display the current outside temperature reading. Temperature decreases are always updated immediately.
If the outside air temperature sensor is short or open circuited, then the display will show 60°C (140°F) or -40°C (-40°F) respectively in place of temperature.
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