Ambient air temperature reading is stuck
06-16-2011, 02:24 PM
#1
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Ambient air temperature reading is stuck
For the past few days my outside air temperature gauge on the panel hasn't changed. The air temperature outside is 80-90° but the reading on the gauge is stuck at 63°. Any ideas where to start the trouble shooting?
2010 Jeep Wrangler X Unlimited
Thanks for your help.
2010 Jeep Wrangler X Unlimited
Thanks for your help.
06-16-2011, 03:18 PM
#2
JK Jedi Master
If you have been driving the Jeep, it should have updated to the ambient temperature.
The only thing an owner can check is the resistance of the temperature sensor, and the wiring for damage.
With it removed, and at approx. 20° C (68°F), the sensor resistance should be between 9-11 Kilohms.
Other than that the problem can be in the Totally Integrated Power Module (TIPM), the Controller Area Network (CAN) data bus circuit, or the instrument cluster.
06-16-2011, 03:25 PM
#3
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Originally Posted by ronjenx
Still under warranty?
If you have been driving the Jeep, it should have updated to the ambient temperature.
The only thing an owner can check is the resistance of the temperature sensor, and the wiring for damage.
With it removed, and at approx. 20° C (68°F), the sensor resistance should be between 9-11 Kilohms.
Other than that the problem can be in the Totally Integrated Power Module (TIPM), the Controller Area Network (CAN) data bus circuit, or the instrument cluster.
06-16-2011, 03:27 PM
#4
What I would do is after checking the wiring for damage, I would un mount it from the cross bar in front behind grille, and stick it so it runs outside the grille in the open, and drive it and see if it works...
06-16-2011, 04:13 PM
#5
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Well never mind for now guys. Haven't even touched it yet and it just started working again. Ill let you know if it happens again, and what was done to fix it. Thanks again.
06-16-2011, 05:53 PM
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I dont remember exactly how this works so hopefully someone will chime in with exact info. But there is something about the speed you drive for a certain amount of time.
I know when I am running a trial up in the mountains the temp gets stuck until we are back out on the highway and moving at a faster speed.
Its something like, if you drive under 30mph for 10 minutes it locks, or something to that effect. Again hopefully someone will chime in with better info.
I know when I am running a trial up in the mountains the temp gets stuck until we are back out on the highway and moving at a faster speed.
Its something like, if you drive under 30mph for 10 minutes it locks, or something to that effect. Again hopefully someone will chime in with better info.
06-16-2011, 06:00 PM
#7
JK Jedi Master
Vehicle with the key off for more than 4 hours...The CCN will update the ambient temperature reading immediately.
Vehicle with key off for more than 2 hours but less than 4 hours....The CCN will update the ambient temperature reading immediately after vehicle reaches above 20 mph (with no duration constraint) and will update every 500 ms thereafter.
Vehicle with the key off for less than 2 hours...The CCN will display the last temperature reading (which is stored in memory) just prior to the ignition being turned off. The CCN will not update the value in the display until the car has been driven at 20 MPH or above for 3 consecutive minutes.
If the vehicles speed and drive time doesn't meet the criteria the CCN will
continue to display the stored value until the criteria is met.
Once the criteria is met, then the CCN will update the display every 500 ms based off of the ambient temperature sensor output.
Vehicle with key off for more than 2 hours but less than 4 hours....The CCN will update the ambient temperature reading immediately after vehicle reaches above 20 mph (with no duration constraint) and will update every 500 ms thereafter.
Vehicle with the key off for less than 2 hours...The CCN will display the last temperature reading (which is stored in memory) just prior to the ignition being turned off. The CCN will not update the value in the display until the car has been driven at 20 MPH or above for 3 consecutive minutes.
If the vehicles speed and drive time doesn't meet the criteria the CCN will
continue to display the stored value until the criteria is met.
Once the criteria is met, then the CCN will update the display every 500 ms based off of the ambient temperature sensor output.
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06-16-2011, 06:29 PM
#8
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Originally Posted by ronjenx
Vehicle with the key off for more than 4 hours...The CCN will update the ambient temperature reading immediately.
Vehicle with key off for more than 2 hours but less than 4 hours....The CCN will update the ambient temperature reading immediately after vehicle reaches above 20 mph (with no duration constraint) and will update every 500 ms thereafter.
Vehicle with the key off for less than 2 hours...The CCN will display the last temperature reading (which is stored in memory) just prior to the ignition being turned off. The CCN will not update the value in the display until the car has been driven at 20 MPH or above for 3 consecutive minutes.
If the vehicles speed and drive time doesn't meet the criteria the CCN will
continue to display the stored value until the criteria is met.
Once the criteria is met, then the CCN will update the display every 500 ms based off of the ambient temperature sensor output.
Vehicle with key off for more than 2 hours but less than 4 hours....The CCN will update the ambient temperature reading immediately after vehicle reaches above 20 mph (with no duration constraint) and will update every 500 ms thereafter.
Vehicle with the key off for less than 2 hours...The CCN will display the last temperature reading (which is stored in memory) just prior to the ignition being turned off. The CCN will not update the value in the display until the car has been driven at 20 MPH or above for 3 consecutive minutes.
If the vehicles speed and drive time doesn't meet the criteria the CCN will
continue to display the stored value until the criteria is met.
Once the criteria is met, then the CCN will update the display every 500 ms based off of the ambient temperature sensor output.
06-16-2011, 06:42 PM
#9
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When I did my grille mod, I noticed that one of the wires were pinched, when they installed the grille at the factory. Not sure if this is your situations But had to wrap both wires with a little electrical tape, to ensure no grounding contact. This happened due one of the metal clips from the grille pinching the 2 wires. Figured I would post my personal expierence.
SLIM
SLIM
10-24-2016, 08:36 AM
#10
JK Enthusiast
Vehicle with the key off for more than 4 hours...The CCN will update the ambient temperature reading immediately.
Vehicle with key off for more than 2 hours but less than 4 hours....The CCN will update the ambient temperature reading immediately after vehicle reaches above 20 mph (with no duration constraint) and will update every 500 ms thereafter.
Vehicle with the key off for less than 2 hours...The CCN will display the last temperature reading (which is stored in memory) just prior to the ignition being turned off. The CCN will not update the value in the display until the car has been driven at 20 MPH or above for 3 consecutive minutes.
If the vehicles speed and drive time doesn't meet the criteria the CCN will
continue to display the stored value until the criteria is met.
Once the criteria is met, then the CCN will update the display every 500 ms based off of the ambient temperature sensor output.
Vehicle with key off for more than 2 hours but less than 4 hours....The CCN will update the ambient temperature reading immediately after vehicle reaches above 20 mph (with no duration constraint) and will update every 500 ms thereafter.
Vehicle with the key off for less than 2 hours...The CCN will display the last temperature reading (which is stored in memory) just prior to the ignition being turned off. The CCN will not update the value in the display until the car has been driven at 20 MPH or above for 3 consecutive minutes.
If the vehicles speed and drive time doesn't meet the criteria the CCN will
continue to display the stored value until the criteria is met.
Once the criteria is met, then the CCN will update the display every 500 ms based off of the ambient temperature sensor output.
I know this is an old thread, but holy cow that clears up a lot of confusion. We were in Moab this last week and the temp. on the trail was always 51°, even when it wasn't! lol. Thanks for this info.