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

2002 Oldsmobile Alero

Tiny

kewanttoknow

May, 28, 2012 AT 3:11 PM

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?

7 Answers

Tiny

rasmataz

May, 28, 2012 AT 3:16 PM

Check and test the coolant temperature sensor

Tiny

kewanttoknow

May, 28, 2012 AT 3:44 PM

I replace the coolant temp sensor, sensor below thermostat housing. Is that the sensor your replying to?

Tiny

rasmataz

May, 28, 2012 AT 3:58 PM

For what liter engine?

Tiny

kewanttoknow

May, 28, 2012 AT 10:23 PM

3.4L V6

Tiny

rasmataz

May, 28, 2012 AT 10:54 PM

See below

Tiny

kewanttoknow

May, 28, 2012 AT 11:58 PM

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

rasmataz

May, 29, 2012 AT 9:56 AM

Could be the computer or a relay, have it further checked and tested

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