There was a thread with the same problem, but I cannot find it.
I cannot even find diagnosing procedures in FSManual.
It seems like the only coolant sensor is installed in thermostat cover and has 2 wires.
Computer turns on electrical fan, I only have temp light in instrument cluster, bulb is on in start position. I keep engine running, but fan doesn't work and light is not on.

No codes.
Haynes manual says 7 K ohms cold,
less than 1000 operating temperature

 

Your radiator fan will come on when the engine is running and the coolant temp reaches 218 degrees F or above. I see that your light does not come on - is there a reason you suspect there is something wrong with your fan?

 

everything is OK.
Thanks.

 

So its normal to run 218ish at arbys drive thru?

 

218 is the upper coolant temp parameter set by the design engineers for when the efan turns on. Has nothing to do with Arby's drive thru. It might have something to do with a bad/weak fan clutch, even cooling system maintenance neglect in general.

 

Gotta be fan clutch short squeal at start.

 

I used 150 Ohms resistor to check computer turning fan on.
I guess, if mechanical fan works fine, there is no need for electrical fan usually, that is why I couldn't see it working.
Well, if I decide to drive my Jeep on Everest, I'll need electrical fan.

 

I kept engine idling and didn't see fan working, so I panicked.

 

You should use a 450 Ohm resistor to check the fan operation. The 450 Ohm resistor will simulate approximately 230* F, well over the design setting but it's a quick check. To really check it you would need a 5K Ohm variable resistor plugged into the ECT sensor connector and while running the rsistance up monitoring a scanner to check the fan setting of the PCM.

 

Thanks, CCKen!