Filtered Ram-Air Heated air Throttle body Alternate air door (Normally closed) Filter Induction system balance tube Induction manifold Left hand bank Induction manifold Right hand bank Turbocharger Waste gate controller Waste gate actuator Waste gate Throttle body Alternate air door (open) Filter Induction system balance tube Induction manifold Left hand bank Induction manifold Right hand bank Turbocharger Waste gate controller Waste gate actuator Waste gate CODE Ram air Ram filtered air Compressed air Heated air Mechanical linkage Oil pressure Oil return Figure 3-17.  A turbocharger air induction system.  supply hose from the rear of the oil cooler directs oil to the  turbocharger center housings and bearings. Oil hoses return  oil from the turbochargers to the oil scavenge pump located  on the rear of the engine. The one-way check valve in the oil  supply line prevents oil from draining into the turbocharger  of the compressor and the amount of intake boost (upper  deck pressure) is controlled. Engine oil is also used to cool  and lubricate the bearings that support the compressor and  turbine in the turbocharger. Turbocharger lubricating oil is  engine oil supplied through the engine oil system. An oil  3-12