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Scott K
Scott K, ASE Master Tech/Instructor
Category: Chevy
Satisfied Customers: 1569
Experience:  20 yrs Experience; GM factory Training ASE Master Certified with L1 advanced engine diagnostics
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where is the ambient air temperature sensor located on ...

Resolved Question:

where is the ambient air temperature sensor located on the 2002 chevy trailblazer ltz
Submitted: 8 years ago.
Category: Chevy
Expert:  Scott K replied 8 years ago.

HiCustomer

Welcome to Just answer,

Just to clarify,

Which temperature sensor are you looking for?

Customer: replied 8 years ago.
Reply to Scott K's Post: The ambient air sensor or the one that controls the external tmeperature reading on the digital readout
Expert:  Scott K replied 8 years ago.

The location is behind the front grille before the condensor. The resistance of the sensor should change with temperature, the higher the temperature the lower the resistance. It can be tested with an ohm meter by placing it in freezer and holding a flame very briefly near the sensor.

Object Number: 740917  Size: SH

Object Number: 713860  Size: SH

Object Number: 769370  Size: SH

Scott K and 3 other Chevy Specialists are ready to help you
Customer: replied 8 years ago.
Reply to Scott K's Post: Does this affect the performance of the automatic climate control system because my external temperature shows -19 degrees at first and the air condition blows hot but after about 15 minutes the reading gradually moves up to the accurate outside temperature and the air starts to cool
Expert:  Scott K replied 8 years ago.
Yes it does, it is also an input to the Auto climate control, If it sees -19 no need to turn on compressor.