Just a question. Anybody else's external temp gauge not working very well? Mine typically only works when it wants to, maybe after I've been driving for 1/2 hour. (This is the type of problem I was expecting, not the Crank pulley)

 

Mine seems to work okay. I have never really checked it over time . I will start doing that . Where is the sensor for tis anyhow ? Anybody know ?

 

I think it is that small sphere near the glass in the middle of the dash (inside). My Lexus has the same thing.

 

I have also noticed it takes some time for it to adjust to the outside temp.

 

Usually takes 15-20 minutes to adjust to outside temps.

 

Does that seem normal to you guys? My Lexus starts changing temps the second I leave the garage and has pegged the real temp by the end of my community (about 1 mile).

 

How does a small sphere in the middle of the dash (inside) measure outside temperature? Should be in front grill area to avoid engine heat throwing off temp reading.

 

The outside air temperature sensor is located on the right hand side of the vehicle, just in front of the radiator, under the fascia. If parked it will register higher temps due to the heat soak up from the ground and from the engine compartment; very noticeable in the summer and if parked in a black-topped parking lot). Usually takes a mile or two for it to cool down to the actual (or close to actual) outside temp. Easy to service if ever required.
The small sphere in the top, middle of the I/P, just to the left of the speaker, is the sunload sensor. The sunload sensor provides the HVAC control module a measurement of the amount of light shining on the vehicle. Bright, or high intensity, light causes the vehicles inside temperature to increase. The HVAC system compensates for the increased temperature by diverting additional cool air into the vehicle. If sensor is open or shorted, no sunload condition occurs.
The sunload sensor also doubles as the light sensor for the auto headlamps. When the sunlight diminishes to a specified level, the HVAC controller signals the BCM to turn on the headlamps and turn off the DRLs. (In previous Corvettes, there was a separate sensor for this function.)
There are also four other sensors in the HVAC automatic system. Two sensors for each side of the car; an upper on each side, and a lower on each side, and these are located in the air ducts.
There is also an inside temperature sensor located just to the left of the ignition button, behind the little grille.

 

What he said...

 

Way cool info!!!! Thanks. Obviously, I'm not a mechanic. But you say a mile or two, (just like my Lexus). So if it takes 1/2 hour before the temp starts to move, I have a problem?

 

I have not noticed a problem with my temp sensor and readout. Mine also reads within seconds of a change in temp... (as far as I can tell)...

 

Mine starts to go down during the first block after leaving the garage.

 

Doesn't anyone read the owner's manual? Pg. 3-28 tells you that if the outside temp. goes up, the displayed temperature will not change until: The vehicle's speed is above 10 MPH five minutes ; The vehicle's speed is above 32 MPH for two and a half minutes.

If the temperature goes down, the outside temperature will be shown when you start the vehicle.

The outside sensor is behind the front bumper.

 

I've checked my a couple of times this winter and it usually take less the five minutes for mine to adjust to the outside temp after exiting the garage.

 

I've been every speed from Sunday and it still takes over 1/2 hour to change temps. Last Sunday, I took it to Blockbuster to return some flicks. The gauge read 42 degrees. It was in the sixties. The whole trip over and back it never changed, until just before I pulled back into the garage. Of course, I planned on taking pictures of the gauge and an external thermometer and it started moving.

 

I was going to say basically the same thing but you beat me to it.

 

I have noticed the same problem of it seeming to be stuck for about 20 minutes after starting to drive. I didn't realize the manual said it would not change the reading for a few minutes after starting. I have seen the problem when the temperature is higher than when I parked the car, so it seems like a bug related to the delay mentioned in the manual.

Seems pretty strange to have it intentionally do this, but it seems like a software bug that is delaying the readout a lot longer than it is supposed to.

 

 

LOL...I guess Im guilty of not reading the owners manual (and spoil the fun!!!) - Ive yet to find the external temperature gauge ;-)