Suzuki DF200/DF225/DF250 V6 4-Stroke Outboards Service Manual, Page 120Get this manual
ENGINE CONTROL SYSTEM
MAP SENSOR OUTPUT VOLTAGE CHANGE09917-47011: Vacuum pump gauge 09930-89340: 26-pin34-pin test cord 09930-99320: Digital testerTester range: DCV (See chart for range 1Remove ring gear cover and silencer case(See page 6-2 2Remove bolts and MAP sensor from collector assembly3Connect vacuum pump gauge (with hose) to MAP sensor as shown in figure4Turn ignition switch ON5While applying negative pressure (vacuum) to MAP sensor, measure "12" terminal voltage(See page 3-49 and 3-50 for procedure