Charge Air Coolant Pump

Electrical power for the charge air coolant pump is supplied from the PCM  relay, located in the EJB  . When the relay is energized, it connects power from the startup battery to the charge air coolant pump. Operation of the charge air coolant pump is controlled by the PCM  with a PWM  signal.

When the charge air coolant pump is running, engine coolant flows from the charge air coolant pump outlet through the charge air cooler. Afterwards to the charge air radiator and back to the charge air coolant pump inlet connection.