2007 Evinrude E-Tec 75, 90 HP outboards Service Manual, Page 87Get this manual
ENGINE MANAGEMENT MODULE (EMM) SENSORS AND FUNCTIONS
SENSORS AND FUNCTIONS
Sensor inputs and internal EMM controllers are used to control outboard operationUse the Evinrude Diagnostics Software program to troubleshoot the sensorsRefer to Evinrude EMM Service Code Chart at back of manual for complete list of all engine fault codes
Sensor indicates less than -71F (-57.4C) or greater than 314F (156.9C) sensor circuit fault is detected and the EMM: Stores service code 23 Initiates EMM NO OILOVERHEAT LED
55 Circuit Sensor
Monitors the EMM's 55 alternator circuitIf system voltage exceeds 57 volts, the EMM: Activates S.A.F.EStores service code 18 Initiates EMM CHARGING FAULT LED Initiates the SystemCheck CHECK ENGINE light 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: Activates S.A.F.EStores service code 17 Initiates EMM CHARGING FAULT LED Initiates the SystemCheck CHECK ENGINE light
Internal Sensors