Pump, Water, AFTERRUN - 1.4L Turbocharged Engine (EAF): Operation: Operation
Hot, pressurized coolant can cause serious burns. Allow the system to cool down and decrease pressure prior to any service being performed.
The after-run pump is used to circulate coolant though the cooling system when the key is off and a predetermined temperature is reached. The primary reason for the pump is to help cool the turbocharger to help prevent damage due to heat soaking. The after-run pump is free spinning in the Key ON, Engine ON condition and activated during Key OFF, Engine OFF condition for up to 10 minutes. The pump draws coolant in from the thermostat housing and sends it to the turbocharger when activated. The Powertrain Control Module (PCM) controls the operation of the pump. The inputs to determine pump operation include engine coolant temperature, throttle position and engine off time.