2003 Chevy Malibu Circulating Fan

Tiny
PATRICIA.WELD
  • MEMBER
  • 2003 CHEVROLET MALIBU
Engine Performance problem
2003 Chevy Malibu 6 cyl Automatic 93,000 miles

Circulating fan does not come on when driving in warm/hot weather when I come to a stop

BUT


Circulating fan does vome on when I run the AC
Wednesday, May 12th, 2010 AT 3:04 PM

5 Replies

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
I assume you are talking about the radiator cooling fan, you may want to check the engine coolant temp. Sensor.
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Wednesday, May 12th, 2010 AT 3:18 PM
Tiny
PATRICIA.WELD
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  • 3 POSTS
How would I check it
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Wednesday, May 12th, 2010 AT 3:20 PM
Tiny
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To test an ECT sensor you will need a volt meter. You can test the ECT by back probing the harness while reading the voltage returning to the EEC. Or you can removing the connector completely and test the resistance between the 2 pins on the ECT. The engine temperature must be greater than 50F to pass the Key On Engine Off Self-Test and greater than 180F to pass the Key On Engine Running Self-Test. To accomplish this, the engine should be at normal operating temperature.


https://www.2carpros.com/forum/automotive_pictures/261618_1_166.jpg



Let me know what temp. you tested at and what the voltage and resistance was .
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Wednesday, May 12th, 2010 AT 3:31 PM
Tiny
PATRICIA.WELD
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Just where under the hood is the ECT sensor?
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Wednesday, May 12th, 2010 AT 3:39 PM
Tiny
BLUELIGHTNIN6
  • MECHANIC
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ECT sensor is at the top rear of the engine
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Wednesday, May 12th, 2010 AT 3:44 PM

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