Mechanics

COOLANT FANS DON'T WORK WITHOUT TURNING ON A/C.

2002 Oldsmobile Alero • 160,000 miles

Just replace intake manifold gaskets Upper & lower. No leaks engine runs fine. Fans comeon with A/C, & can turn them on with my scanner two speeds low & high. With car idling without A/C on. Fan don't come on. Could the engine computer be the problem?
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Kewanttoknow
May 28, 2012.




Check and test the coolant temperature sensor


Tiny
Rasmataz
May 28, 2012.
I replace the coolant temp sensor, sensor below thermostat housing. Is that the sensor your replying to?


Tiny
Kewanttoknow
May 28, 2012.
For what liter engine?


Tiny
Rasmataz
May 28, 2012.
3.4L V6
AD


Tiny
Kewanttoknow
May 28, 2012.
See below


Tiny
Rasmataz
May 28, 2012.
Yes I replace the coolant temp sensor. I check the voltage at the connector 5 volts on one and complete ground on the other one.


Tiny
Kewanttoknow
May 28, 2012.
Could be the computer or a relay, have it further checked and tested


Tiny
Rasmataz
May 29, 2012.

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