Auxiliary Coolant Pump

Auxiliary Coolant Pump

The auxiliary coolant pump is an electric pump that ensures there is a satisfactory flow rate through the heater core at low engine speeds. The auxiliary coolant pump is installed in the engine compartment, in a rubber mounting attached to the side of the LH (left-hand) suspension turret. Operation of the auxiliary coolant pump is controlled by a power supply from the ATC (automatic temperature control) module.