Radiator fans Not working properly

Daniel370

I've had my 370z for about 8 months and I haven't been able to fix the problem with my radiator fans. They are constantly running on the highest setting regardless of temp. Even in accessory mode, the fans kick on full blast. I've replaced the thermostat (which was faulty), coolant temp sensor, fan control module, ECU (fixed other problems), the radiator fan fuse, PWM relay, and the fan motors themselves. All that is left is the wiring. According to the Nissan dealer, the ECU I provided tested fine. Is there another control module that can be tuned other than the ECU so that the fans stay on all the time? Nissan tech says that my car doesn't let his Nissan diag tool connect due to lack of voltage since the fans are on during accessory mode. Also, there was never any CEL regarding the fans. I also forgot to mention that I replaced the IPDM fuse box. Any ideas? Appreciate the feedback