hey bro...no idea I am sure it is due to removal of thermostat and making a direct connection between fan and battery. This is done to make sure that engine remains cool at all times. I had done this before on my old wira as I used to face overheating problems. The only drawback is fan will kong in 3-4 years and you cannot keep keep the car in ignition mode for long i.e; you immediately need to start the engine to make sure battery is not discharged completely.