2006-2010 Suzuki DF150 / DF175 4-Stroke Outboards Service Manual, Page 106Get this manual
ENGINE CONTROL SYSTEM
INSPECTION FOR ECM CIRCUIT VOLTAGE
# ECM cannot be bench checkedIt is strictly prohibited to connect any tester (voltmeter or ohmmeter) to an ECM which has been disconnected from the engine wiring harness! 09930-89340: 26-pin34-pin test cord 09930-99320: Digital testerTester range: DCV (See chart for range 1Turn ignition switch OFF2Connect the 26-pin34-pin test cord between ECM and wire harness as shown in figure3Turn ignition switch ON4Connect the tester probe ("-", Black) to body ground, and measure voltage according to the "CIRCUIT VOLTAGE TABLE"