2009-2010 Suzuki DF70A DF80A DF90A Outboard Service Manual, Page 64Get this manual
1A-12 Engine General Information and Diagnosis: Failed Item Neutral switch RectifierRegulator (Over-charging) Oil pressure switch Trim sensor Condition While the shift sensor outputs forward or reverse signal, the ECM receives neutral signal from the neutral switch Receiving 16 volts or higher signal While the engine is stopped and the ignition switch is on, the ECM receives an "off" signal from the oil pressure switch Receiving an out of range "0.2 4.8 V" signal Fail-Safe System Description
The fail-safe system is closely related to the self-diagnostic systemWhen an abnormality occurs in sensor signal, the ECM ignores the out-of-range signal and assumes preprogrammed value for the failed sensorsThis allows the engine to continue running under the fail-safe conditionPre-Programmed Value for Fail-Safe System Failed Item MAP sensor Air intake system Cylinder tempsensor IAT sensor Exhaust manifold tempsensor Throttle position sensor Shift position sensor Trim sensor NOTE There is no back-up system for the ECM itselfThe engine will stop if it has failed