2001 Chrysler Sebring Q&A
2001 Chrysler Sebring Question: How can i tell if the ecm/pcm is whats keeping the fans from coming on?
Have a 2001 Chrysler Sebring 2.7 convertible. Fans don't cycle when they should. Original problem was that the bleeder housing just exploded one day while driving. No warning! The temp gauge didn't register hot or anything. When I replaced the bleeder housing and bled the system everything seems fine until the temp gets up to around 210-215 then the overflow tank starts to bubble and bucking sound. No Fans. I can take the relay out Hi/lo and the fans go on and the car seems to cool. I can unplug the sensor on the bleeder housing and get the fans to come on too. There were compromises in the cooling system which I took care of. I know that the system, according to previous research, has to hold 16 lbs. of pressure before the fan relay gets the signal/pulse to come on and I'm sure with no compromises it's reaching that. Still no automatic fan activity. I replaced the thermostat, toggle up at the top, the water pump seems fine, and the sensor is new, came with new bleeder housing. I replaced rad cap. I'm thinking that the ecu/pcm is not sending a signal to the fan relay. What would I check to know for sure. Oh I checked with an ohm meter the activity of the sensor with the engine running unplugged and the numbers were going down on the sensor, don't know what that means exactly. I know a little about the two wire and one wire sensors So what can you tell me? I hope the answer is deserving of the charge. Thanks Don - dwhitehead042
Since this advice is FREE, I suggest having a scan test so live data can be viewed to determine what the PCM is seeing as engine temperature at the time of overheating! ... As well as a lot of other useful info and functional test that can be obtained from a 'real' scan tool!!! - pushrod