I have done several Gen 5 LT series engine swaps with the E92 controlling a fan relay instead of having to utilize a PWM fan. Typically just setting the Hz frequency to 1200Hz holds the relay closed letting the fans come on.
However, today I am having no luck. The factory PWM frequency setting is 100Hz and no matter the change I make in the tune, the signal across the relay remains 100Hz not the 1200Hz I set it to.
Any ideas?