I have my E-fans set-up to be controlled 100% by the PCM. The fans are working fine with the tempter set points. I can't get the fans to come on high when the the A/C high side pressure get above 200psi set point. I was told that the 02-03 pcm can not control those set-point even know these set-point are in that 02-03yr tune file. I was also told if I get a 04 PCM that it was wired internally able to work those set-points. Can anybody verify this info for me?
Thanks

 

Well after doing alot reading the 02 truck doesn't have any a/c pressure sensor. So guess i answer my own question.

 

But!!!

You can set it up so the fans come on with the AC if the coolant temp is above a set Temp..

Ill find the table tonight when i get home.

 

You can use the ac clutch signal to turn the fans on....and if you swap to an 04 you have to convert to a DBW throttle body and pedal.

 

when my ECT is above 70* and my AC is on, my fan 1 is turned on.
it keeps the ac cool and the coolant doesnt rise but about 5*.

 

Yes I know I can run the fans off the clatch signal and I've burned up two relays over the past three yrs because of the cycleing of the a/c in 90* weather. Maybe 04 pcm is out of the question. I know the 03 truck have the pressures sensor in the high side of A/c. Can I just upgrade the os to an 03. Can i just flash a 03 over my 02 os ? Thanks guys.

 

Now it gets tricky...i think some of the vans had a cable TB up to 05, but im not sure of their numbers. If you can find one of those, you may could make it work.

 

Do you use EFI LIVE?

 

So 03 trucks are drive by wire too?

 

Yes I do.