Barometric Pressure Sensor; Exhaust Pressure Sensor; External Sensors; Air Temperature Sensor - BRP E250DHLSCS Service Manual

Barometric Pressure Sensor

Supplies the EMM with barometric pressure read-
ing to compensate for changes in altitude and air
density.
If the BP sensor reads less than 13 KPa or greater
than 119.0 KPa, or the sensor or circuit fails, the
EMM:
Stores service code 44
If the BP sensor reads less than 70 KPa, the
EMM:
Stores service code 45
If the BP sensor reads greater than 105 KPa, the
EMM:
Stores service code 46

Exhaust Pressure Sensor

The exhaust pressure sensor monitors exhaust
pressure during all running conditions to compen-
sate for engine loads.
If the sensor reads less than -85 in. water, or
greater than 85 in water, or the sensor or circuit
fails, the EMM:
Stores service code 87
EMM LED 3: ON (Running)
If exhaust pressure is less than 40 in. water, the
EMM:
Stores service code 88
EMM LED 3: ON (Running)
If exhaust pressure is greater than 80 in. water,
the EMM:
Stores service code 89
EMM LED 3: ON (Running)
ENGINE MANAGEMENT MODULE (EMM)

EXTERNAL SENSORS

Sensor inputs and internal EMM controllers are
used to control outboard operation. Use Evinrude
Diagnostics software to troubleshoot the sensors.
Refer to the EMM Service Code Chart at the
back of this manual for a complete list of all
engine fault codes.
The EMM provides a 5 V DC signal for sensor cir-
cuits. It monitors all sensor voltage inputs and
compares them to predetermined acceptable
ranges. Inputs that fall outside of the acceptable
range create service codes.

Air Temperature Sensor

The air temperature sensor monitors the air tem-
perature at the throttle body.
If the AT sensor voltage is out of the expected
range, or the sensor or circuit fails, the EMM:
Stores service code 47
EMM LED 3: OFF (Cranking)
EMM LED 3: ON (Running)
Engine Temperature Sensor
Monitors cylinder head temperature.
If PORT cylinder head temperature is greater than
212°F (100°C) below 2000 RPM, or greater than
194°F (90°C) above 2000 RPM, the EMM:
Activates S.A.F.E.
Stores service code 43
EMM LED 4: ON (Running)
Engine Monitor TEMP display: ON
If STBD cylinder head temperature is greater than
212°F (100°C) below 2000 RPM, or greater than
194°F (90°C) above 2000 RPM, the EMM:
Activates S.A.F.E.
Stores service code 69
EMM LED 4: ON (Running)
Engine Monitor TEMP display: ON
EXTERNAL SENSORS
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