2006-2010 Suzuki DF150 / DF175 4-Stroke Outboards Service Manual, Page 82Get this manual
ENGINE CONTROL SYSTEM
HIGH PRESSURE FUEL PUMP CONTROL SYSTEM
OUTLINE To supply the optimum fuel amount, the ECM controls the fuel pump drive duty cycle, repeated ONOFF signal, at specified rate (1 000 times second)Based on engine speed and battery voltage, the ECM determines the optimum duty (repeating "ON" time rate within cycle) and sends this signal to the fuel pump
CKP sensor: Informs ECM of engine speedBattery voltage Ignition switch: Informs ECM of "START" signalCylinder tempsensor: Informs ECM of cylinder temperatureECM Signal FP Fuel pump
Battery charge coil Rectifierregulator
60A fuse 15A fuse
ECM CPU ECM main relay