Suzuki DF25/DF30 Four Stroke Service Manual, Page 66Get this manual
ENGINE CONTROL 3-15
CYLINDER TEMPERATURE SENSOR
FUNCTION The cylinder temperature sensor is installed on cylinder and used to detect the cylinder temperatureThis is thermistor type sensor (resistance of which changes depending on the temperature) and inputs signal to the CDI unit as voltage valueThis input signal is used to detect engine over-heat as the CDI unit detects both the temperature and temperature change gradient (temperature rise VS time)FAILURE SYMPTOMS No over heat detection function
TESTING CYLINDER TEMPSENSOR
09930-99320Digital tester Tester range(Resistance) 1Remove the cylinder tempsensor from cylinder2Connect tester probe to sensor lead wires as shownTester probe connection Red (+) Violet Black () Black