I have a 7th gen Accord that has recently started to overheat at stoplights. I believe the issue is the radiator fan. When I run my a/c both the radiator fan and the condenser fan come on so I know they both work. However, when I turn off the a/c the radiator fan never comes on. I have an OBDII scanner and I can see that the Engine Coolant Temp gets up to as high as 232 degrees F. The fan should trigger at around 200 degrees. I know that there are 2 sensors for engine coolant in the 7th gen Accords, one at the bottom of the radiator (ECT2) and one in the back of the block (ECT1). My question is which one of these triggers the radiator fan? Or it is most likely a bad relay?