Originally Posted by
blindsquirrel
I've seen other Camaro OSes that were originally relay/discrete fans that would not do a PWM output no matter what settings were used. That was on a 2011 and I was able to find a Corvette file with the same OS ID and swap in the 'System' segment, and it then worked.
Problems here are:
- no way to verify whether there's a PWM signal coming out, other than 'it doesn't work'. That's not good enough to say one way or the other.
- by 2014, Corvettes were D.I. and using E92 so I don't know where a donor for the segment swap would come from. 2014 CTS-V is E67. 2014 Caprice is E38 but a different OS ID.
I suppose, since all the 2011-up E38s had a single Service Number, you could swap it out to a 2011 Camaro OS, which is probably easiest/cheapest to just get another ECM pre-programmed to a 2011 VIN. Unless you have the stuff to do SPS flashing yourself. It can't be reflashed to a different year like that in HP Tuners even if you wanted to spend the credits to license a different file (8 segments in the ECM but HPT only reads/writes 6 of them).
Brett from SPAL has posted here in the past, and somewhere described the defaults for the different fans' control strategies. I believe it was in another of those extremely frustrating "I bought the wrong fans and have no choice but to keep digging the hole I'm in please help" threads.