Featuring brushless, no-leak, low-noise design with integrated microcontroller, ATCP Electric Auxiliary Thermal Coolant Pump provides continuous flow of coolant through auxiliary circuits. When engine is running, microcontroller communicates directly with engine controller to maintain optimum speed for engine conditions, from 0–100% depending on application. When engine is off, ATCP transmits heat to heater core to keep auxiliary systems working at optimal temperatures.