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  #1  
Old 12-26-2011, 06:12 AM
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Thermometer

Hi all

Can someone tell me where the sensor for the outside temp is.
Yesterday I was driving in a snowstorm when suddenly the thermometer gave 32 degrees celcius when it was -2.
I think it was the heat from the engine so I would like to put something over it so it wont happend again.


Merry Christmas to everyone.
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Old 12-26-2011, 08:46 AM
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Re: Thermometer

I believe it is on the passenger side, just inside the grille.
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Old 12-26-2011, 09:47 AM
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Re: Thermometer

Quote:
Originally Posted by PeterB16 View Post
I believe it is on the passenger side, just inside the grille.
Confirm. You can see it just inside the passenger side grill.
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Old 12-26-2011, 01:45 PM
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Re: Thermometer

I would not expect a temperature of 32 C due to engine temperature, when driving in a snowstorm. You most probably have an almost short in the thermometer wires/connector or a problem with the sensor itself. I would start cleaning connector(s) and checking the wiring for shaving. A completely shorted temp sensor wire gives a temperature of 54 C in the EVIC.
Here some test values:

DIAGNOSIS AND TESTING - AMBIENT
TEMPERATURE SENSOR
(1) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Disconnect the ambient temperature sensor wire harness
connector.
(2) Measure the resistance of the ambient temperature
sensor. At 40 C (40 F), the sensor resistance
is 336.6 kilohms. At 60 C (140 F), the sensor
resistance is 2.49 kilohms. The sensor resistance
should read between these two values. If OK, refer to
Diagnosis and Testing - Ambient Temperature

Sensor Circuit
in this group. If not OK, replace the
faulty ambient temperature sensor.


DIAGNOSIS AND TESTING - AMBIENT


TEMPERATURE SENSOR CIRCUIT




(1) Turn the ignition switch to the Off position.


Disconnect and isolate the battery negative cable.
Disconnect the 2-way ambient temperature sensor
wire harness connector and the 22-way Body Control
Module (BCM) wire harness connector.
(2) Connect a jumper wire between the two terminals
in the body half of the 2-way ambient temperature
sensor wire harness connector.
(3) Check for continuity between the sensor return
circuit and the ambient temperature sensor signal
circuit cavities of the 22-way BCM wire harness connector.
There should be continuity. If OK, go to Step
4. If not OK, repair the open sensor return circuit or
ambient temperature sensor signal circuit to the
ambient temperature sensor as required.
(4) Remove the jumper wire from the body half of
the 2-way ambient temperature sensor wire harness
connector. Check for continuity between the sensor
return circuit cavity of the 22-way BCM wire harness
connector and a good ground. There should be no
continuity. If OK, go to Step 5. If not OK, repair the
shorted sensor return circuit as required.
(5) Check for continuity between the ambient temperature
sensor signal circuit cavity of the 22-way
BCM wire harness connector and a good ground.
There should be no continuity. If OK, refer to

Diagnosis and Testing - Electronic Vehicle Information

Center
in this group. If not OK, repair the

shorted ambient temperature sensor signal circuit as

required.
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Old 12-26-2011, 05:35 PM
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Re: Thermometer

Quote:
Originally Posted by PeterB16 View Post
I believe it is on the passenger side, just inside the grille.
I was curious about where it was located. Thanks for the tip.

Quote:
Originally Posted by DrLocke View Post
Confirm. You can see it just inside the passenger side grill.
I Thank you as well
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Old 12-27-2011, 01:47 PM
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Re: Thermometer

Well Im positive its because of the engine heat because as soon as I could turn into another angel the temp was alright.
Yesterday I drove for two hours and it was still OK.
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Old 12-28-2011, 03:51 PM
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Re: Thermometer

I suddenly started having problems with mine a few weeks ago. One day i Started it up and it read -40 and has been at that temp ever since. Would this mean the sensor is bad?
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Old 12-28-2011, 05:46 PM
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Re: Thermometer

The temperature indication goes to -40 when the sensor circuit is open. So that can mean a broken sensor, or an open wire. The sensor resistance is mentioned in my answer above.
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Old 12-31-2011, 10:03 AM
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Re: Thermometer

Could be the heat throwing it off a lil due to the low temp. I know people that have had false readings in low temps such as yours.
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