I have a grand cherokee, but i have one problem. The coolant temperature sensor faulty is flashing most of the time, activating the chime. I searched the pinout on the ECU and tested it and found that i get the 14Kohm signal back there, same as on the sensor. Anybody know what is causing this or have stumbled upon similar problems? Could it be a cold solder on the ECU PCB? Thank you