5 V Circuit Sensor; Barometric Pressure Sensor; External Sensors; Air Temperature Sensor - Evinrude E-Tec 40 HP Service Manual

5 V Circuit Sensor

Monitors the EMM's 5 V sensor circuit.
If sensor voltage is less than 4.75 volts, the EMM:
Stores service code 78
EMM LED 3: OFF (Cranking)
EMM LED 3: ON (Running)

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
greater tha n 1 19.0 KPa, or the sensor or circu it
fails, the EMM:
Stores service code 44
If the BP se nsor reads less than 70 KPa, the
EMM:
Stores a service code 45
If the BP sen sor reads greater than 105 KPa, the
EMM:
Stores service code 46
ENGINE MANAGEMENT MODULE (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
engine fault codes.
The EMM provides a 5 V DC signal for sensor cir-
cuits. It monitors
compares them to prede
ranges. In puts that fa ll ou tside of the accept able
range create service codes.
13.3 KPa or

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:
Stores service code 47, 48, or 49
EMM LED 3: OFF (Cranking)
EMM LED 3: ON (Running)

Engine Temperature Sensor

Monitors cylinder head temperature.
75 - 90 HP M
If cylinder he ad temperature exceeds 212° F
(100° C) below 3500 RPM, the EMM:
Activates S.A.F.E.
Stores service code 40
EMM LED 4: ON (Running)
Engine Monitor TEMP display: ON
If cylinder he ad temperature exceeds 194° F
(90° C) above 3500 RPM, the EMM:
Activates S.A.F.E.
Stores service code 43
EMM LED 4: ON (Running)
Engine Monitor TEMP display: ON
EXTERNAL SENSORS
all sen sor volt age inpu ts and
termined accept able
ODELS
of all
4
57