2009-2010 Suzuki DF70A DF80A DF90A Outboard Service Manual, Page 97Get this manual
Engine Electrical Devices: Cylinder Temperature Sensor The cylinder temperature sensor is installed on the cylinder (top side) and is used to detect the cylinder temperatureThis is thermistor type sensor (resistance of which changes depending on temperature) and inputs signal to the ECM as voltage valueThis signal is used to compensate the fuel injection duration, ignition timing, etcThis sensor is also used to detect engine over-heat as the ECM detects both the temperature and temperature change rate (gradient temptemperature rise vstime) 1C-3
Exhaust Manifold Temperature Sensor The exhaust manifold temperature sensor is installed on the exhaust manifold and used to detect exhaust manifold temperatureThis sensor is the same type as the cylinder temperature sensor, and inputs signal to the ECM as voltage valueThis signal is also used to detect engine over-heat