Auxiliary Coolant Pump
The auxiliary coolant pump is an electric pump attached on a bracket, at the front right side of the engine.
When the engine is turned off the auxiliary coolant pump provides engine coolant flow to prevent engine coolant boiling:
- In the turbocharger
- And in the integrated exhaust manifold.
The auxiliary coolant pump has a 3-pin connector. The first pin receives a permanent power supply from a fused output from the Battery Junction Box (BJB). The second pin has a hardwired connection to the PCM and the third pin has a ground connection.