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ENGINE MANAGEMENT MODULE (EMM)
EXTERNAL SENSORS
4
5 V Circuit Sensor
Monitors the EMM’s 5 V sensor circuit.
If sensor voltage is less than 4.75 volts, the EMM:
Barometric Pressure Sensor
Supplies the EMM with barometric pressure read-
ing to compensate for changes in a ltitude and air
density.
If the BP sensor reads less than 13.3 KPa or
greater tha n 1 19.0 KPa, or the sensor or circu it
fails, the EMM:
If the BP se nsor reads less than 70 KPa, the
EMM:
If the BP sensor reads greater than 105 KPa, the
EMM:
EXTERNAL SENSORS
Sensor inpu ts and intern al EMM controllers a re
used to contro l outboard operation. Use Evinrude
Diagnostics software to troubleshoot the sensors.
Refer to the EMM Service Code Chart at the
back o f this ma nual for a complete list of all
engine fault codes.
The EMM provides a 5 V DC signal for sensor cir-
cuits. It monitors all sen sor volt age inpu ts and
compares them to prede termined accept able
ranges. In puts that fa ll ou tside of the acceptable
range create service codes.
Air Temperature Sensor
The air te mperature sensor monitors the a ir tem-
perature at the throttle body.
If t he A T se nsor voltage is out of th e expecte d
range, or the sensor or circuit fails, the EMM:
Engine Temperature Sensor
Monitors cylinder head temperature.
75 - 90 HP MODELS
If cylinder he ad temperature exceeds 212° F
(100° C) below 3500 RPM, the EMM:
If cylinder he ad temperature exceeds 194° F
(90° C) above 3500 RPM, the EMM:
Stores service code 78
EMM LED 3: OFF (Cranking)
EMM LED 3: ON (Running)
Stores service code 44
Stores a service code 45
Stores service code 46
Stores service code 47, 48, or 49
EMM LED 3: OFF (Cranking)
EMM LED 3: ON (Running)
Activates S.A.F.E.
Stores service code 40
EMM LED 4: ON (Running)
Engine Monitor TEMP display: ON
Activates S.A.F.E.
Stores service code 43
EMM LED 4: ON (Running)
Engine Monitor TEMP display: ON
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