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ENGINE MANAGEMENT MODULE (EMM)
EXTERNAL SENSORS
Engine Temperature Sensor
Monitors cylinder head temperature. The sensor
is a negative temperature coefficient thermistor
(NTC).
If cylinder head temperature exceeds 212° F
(100° C), the EMM:
If cylinder head temperature exceeds 248°F
(120°C), the EMM:
The outboard will not restart after a temperature
related SHUTDOWN until the engine temperature
returns to normal. Refer to SHUTDOWN MODE
on p. 94.
If sensor values are below -15°F (-26.1°C) or
above 331°F (166.5°C), the EMM:
If sensor values are below -4°F (-20°C), the EMM:
If engine does not reach operating temperature on
cylinder head (104°F / 40°C below 2300 RPM) in
10 minutes, the EMM:
Low Oil Switch
The low oil switch monitors the oil level in the oil
tank.
If the oil level falls below one-quarter capacity, the
EMM signals:
When the oil level falls below one-quarter, the
EMM begins counting oil pump pulse cycles.
When it reaches 4800 pulses, the EMM:
To recover from S.A.F.E. mode, the oil pump must
cycle for a minimum of three pulses with the oil
level above one-quarter.
If outboard has been run for more than 3 hours
with NO OIL faults (codes 34 & 117), the EMM
Throttle Position Sensor
The throttle position sensor is connected to the
throttle plate shaft. The sensor receives a voltage
signal from the EMM. As the throttle lever is
rotated, the EMM receives a return voltage signal
through a second wire. This signal increases as
the TPS lever is advanced. A third wire provides a
ground circuit back to the EMM.
Refer to TPS Calibration on p. 143.
If the TPS circuit reads above 0.78 volts when the
key is turned to ON, or the recoil starter is pulled,
the EMM:
If the outboard starts, the code is stored.
Activates S.A.F.E.
Stores service code 43
EMM LED 4: ON (Running)
Engine Monitor TEMP display: ON
Activates SHUTDOWN
Stores service code 31
EMM LED 4: FLASHING
Engine Monitor TEMP display: FLASHING
Stores service code 41
EMM LED 3: OFF (Cranking)
EMM LED 3: ON (Running)
Stores service code 42
EMM LED 3: OFF (Cranking)
EMM LED 3: ON (Running)
Stores service code 58
EMM LED 3: OFF (Cranking)
EMM LED 3: ON (Running)
Engine Monitor LOW OIL display: ON
Activates S.A.F.E.
Stores service code 117
EMM LED 4: ON (Running)
Engine Monitor NO OIL display: ON
Activates SHUTDOWN
Stores service code 33
EMM LED 4: FLASHING
Engine Monitor NO OIL display: FLASHING
Creates service code 11
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