Suzuki 2003-2007 DF60 DF70 Outboard Motors Service Manual, Page 85Get 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 separated from the engine wiring harness09930-89950: 44-pin test cord 09930-99320: Digital tester Tester range: (DC voltage) 1Connect the 44-pin test cord between the ECM and the wire harness as shown in the figure2Turn the ignition switch ON3Connect the tester probe(Black) to the body ground, and measure the voltage according to the "CIRCUIT VOLTAGE TABLE"