Hello all,

1991 Honda Accord H22A Swapp
I have 2 ecu's, I'm unsure of which one I had on the car when I heard the fans kick on. ECU's: P13, P06 (Tuned to a P28? By teknotik). Currently using P13 (92-95 ECU?)

I was just wondering if neone could tell me if the engine coolant temperature sensor would cause the radiator fans to NOT click on? I'm referring to a problem I have been having with a choked/dieing/overheating/whatever the craping ol' hell is wrong with her now (and for a while apparently), This only happens when the car is warm. I was told by a user here to check my ECT but I was told there is no checking, they will look alright but function otherwise.. I'm gearing to buy this, just don't know where.

Video:
http://www.youtube.com/watch?v=BuzqRUt-7Dw

 

Damnit wrong forum, can a mod move this please?

 

Find a wiring diagram for your car. There should be 2 wires coming from the ect sensor. One will be a low input, which is usually a ground and should read 0 volts, and a signal wire which usually pulses between .9v and 5v. Depending on how hot/cold the engine is will make the voltages vary. ECT sensor are negative temperature coefficient sensor, which basically means when the voltage is low the engine is hot and vise versa. To determine whether it is the sensor or some sort of faulty wiring. Set your mulltimeter to ohms and measure the resistance across the sensor. At operating temperature it should read around 350 ohms. To measure voltage, backprobe the sensor and do what's call a voltage drop, at operating temperature it should read .74 - .64 volts.

If everything checks out to be within specifications you can then assume that it is the wiring from the sensor to the pcm.

 

Ask and you shall receive.