Question about 2002 Chevrolet TrailBlazer

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Temp reading on rearview mirror always says 0C

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OC means open connection. Check connector at temperature sensor under the hood, it is located along the radiator support about at center position.

Posted on Oct 12, 2010

  • Tdanielsah Nov 05, 2010

    Mine has been showing "OC" for years now. Wish I'd known it was that simple. I'll look for that this weekend. I miss that little feature :)

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The interior rear view mirror has temperature and compass displays, but only work for a short time at start- up.I have tried unplugging the harness on the back of the mirror and cleaning contacts. It`s...


Temperature Display
The inside rearview mirror supplies a 5 volt signal circuit and low reference circuit to the ambient air temperature sensor. The inside rearview mirror monitors and records the voltage on the signal circuit of the ambient air temperature sensor. The inside rearview mirror uses this recorded voltage to display the temperature on the temperature display portion of the compass/temperature display. The temperature display will show "ICE" when the ignition is first turned on and the current temperature is 3°C (37°F) or below. The display will toggle between "ICE" and the actual outside temperature for approximately 4 minutes.
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the mirror will display a "SC" if the mirror senses a temperature of greater than 112°C (143°F).



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