SYSTEM DIAGRAM *1 ECM *2 Engine Coolant Temperature Sensor *3 Air Fuel Ratio Sensor (for Bank 1 Sensor 1) *4 Heated Oxygen Sensor (for Bank 1 Sensor 2) *5 Crankshaft Position Sensor *6 Intake Manifold *7 Manifold Absolute Pressure Sensor *8 EGR Valve Assembly