Does Anyone know how to check the fan relays, to see if they are bad? Tom, tuned my car and has it to where the fans should kick on 20%@ 191deg. and 30%@192deg. and above. My problem is, the fan's wont kick on at the set temp, but when i turn the a/c on they will kick right on? Me and tom are kinda lost, with this. So any ideas?

 

E-fan relays are typically fail-closed. If the relay was bad, the fan would run all the time. The cooling fan is set to kick on at some ridiculously hi coolant temp like 225°F.

 

The fans don't work this way. They are either on or off - you can't change them to be a certain percentage on. You are changing the wrong table values to get the fans to come on when you want. You need to change the fan percent tables back to stock setting then change the value under the 0->1 and 1->2 to be one less then the desired temp you want to come on.

i.e. = table looks like:

You change 0->1 to 29 = first fan kicks on at 192
change 0->1 to 39 = first fan kicks on at 203
change 1->2 to 57 = both fans come on at 221

Also - if you change 0->1 to 40 the fans will not kick on until 207 (hence why the values must be one LESS then the value in the table when you want the fan to come on)

Don't forget to change the 2->1 and 1->0 tables to appropriate values as well or the fans won't turn off correctly either.

 

Thanks man, im not the one doing it, so ill pass this info on.

 

That's how it is set up rnjmur.... I even flashed the same fan settings to my car and it is fine. His fan settins came from my fan settings originally.

 

have u talked to brian yet?

 

No, but I got ahold of chad. He hasn't had a fan issue either that he knows of

 

has he let it idle? hey tom did i tell u bought a heatexchanger? lol jp

 

you can always try reflashing. Sometimes that will fix some strange problems.

 

That's my last idea. Just reflash the tune.