So I have had my car parked for 3 days without turning it on once, and I go to start it yesterday, turn it on for about 30 seconds just to let it run (not long enough to even heat up) turn it off... and my fan kicks in and runs for about ten minutes....I know I have a "delayed" fan in my model integra which can kick on after it shuts down but it shouldnt kick on until my car has been heated up right... I just need to know if it is a sensor that might need replacing or maybe a crappy ground somewhere??? thanks h-t

P.s. the car is not throwing any codes, the coolant is full, and the temperature was about 35 degrees when it happened

 

i'd probably check your coolant temp sensor first, but i believe that there is a cooling fan control module which takes over when the car is off. i know the da's have one. at least, i think it was a module

 

The fan switch is coming on too soon. It's above the oil filter, and has two pins side-by-side. Replace with new OE for about $40.

There was originally black rubber boot over the connector. If it's still there, you'll likely need to cut the boot off, as it will be rock-hard by now.

 

is the temp sensor on the thermostat housing? the wire thing connected to the top bolt (kinda like a ground wire)? and if thats not it, then what is it? or is the temp sensor right under the dizzy?.... god I need a helms manual...

cutting that boot wont hurt anyting im guessing?? or do I have to cut it to replace it.. sorry not near my car right now.

 

no, i apologize. the temp sensor has nothing to do with the fan circuit. dunno why i wrote that.
as mentioned, it's likely the switch. you can test its resistance with an ohmmeter to confirm. if you suspend it in hot water, say 40-50* and it reads 0 ohms, switch is closing early and should be replaced

the boot will probably just crumble anyways due to age and location. you may be able to get one from honda still. or just get creative. maybe some shields for the bullet connectors. it's just there to protect the terminals

 

It's the sensor under the distributor. Your Integra does not have any kind of sensor at the thermostat housing; the ECU grounds through that thermostat wire.

The boot is not necessary.
You will need to cut the boot open in order to get it off the sensor so you can get the sensor off the engine. Just be careful when cutting it off not to damage anything around it (such as the wires). Use a fresh, SHARP knife blade, and use many light strokes to cut through the boot rather than a few heavy ones. Be patient; the boot will be hard. Once you have a slit in the boot, you should be able to use a screwdriver to make a gap in the boot.

You may need to crimp on new connectors, so be prepared for that. They are bullet-type connectors. I cannot remember what size; take the new sensor to the auto parts place so as to help you find the right size connectors. Space is really tight under there, and you may find it easier to remove the oil filter before starting work.

Also, when you remove the sensor, coolant will begin dribbling out of the block. So have the car overnight-cold, and leave the rad cap on. Have the new sensor ready to hand so you can put it in really quickly before the coolant makes a mess on your driveway.

DO NOT overtorque! The sensor has tapered pipe threads.

 

little bit of teflon on the threads wouldn't be a bad idea either

 

Thanks a bunch guys. When the weather warms up a little bit I'll tackle this.

 

That's fine. There's no real harm in the fan running too much, except for extra wear on the fan motor, and the annoyance of the sound of the fan.

 

Actually I think it is the EOTS, [engine oil temperature switch] that triggers the RFCM, [rad fan control module] when ign. switch is off, so either it is NG or the RFCM is bad.

To test, unplug the EOTS and see if rad fan still turns on, [runs] once ign. is turned off.

It is located at the back of the block a little to the left, [drivers side] of oil filter, green 2pin plug, [white/green and black] 94