2008 Evinrude E-TEC 55MFE Technical Manual, Page 79Get this manual
ENGINE MANAGEMENT MODULE (EMM) INTERNAL SENSORS
INTERNAL SENSORS
Sensor inputs and internal EMM controllers are used to control outboard operationUse the Evinrude Diagnostics software to troubleshoot the sensorsRefer to EMM Service Code Chart at the back of this manual for complete list of all engine fault codesInternal sensors are NOT serviceableReprogramming or replacement may be required to resolve EMM related issues
If sensor reads less than -71F (-57.4C) or greater than 313F (156C), sensor circuit fault is detected and the EMM: Stores service code 23 EMM LED 3: OFF (Cranking) EMM LED 3: ON (Running)
55 Circuit Sensor
Monitors the EMM's 55 alternator circuitIf system voltage exceeds 57 volts, the EMM: Stores service code 18 EMM LED 1: ON (Running) Engine Monitor CHECK ENGINE display: ON If system voltage is below 45 volts with outboard running 500 to 1000 RPM or is below 52 volts with outboard running above 1000 RPM, the EMM: Stores service code 17 EMM LED 1: ON (Running) Engine Monitor CHECK ENGINE display: ON