Evinrude E-tec 75 HP, Service Manual

Page: 92 / 344

92
ENGINE MANAGEMENT MODULE (EMM)
S.A.F.E. WARNING SYSTEM
S.A.F.E.
WARNING
SYSTEM
The
EMM
activates
S.A.F.E.
(
Speed Adjusting
Failsafe Electronics
) and the dash-mounted
Sys-
temCheck
gauge and horn to alert the operator of
abnormal operating conditions and to prevent
engine damage that could result from:
•
Loss of oil flow
•
Engine overheat
•
Excessive
EMM
temperature
•
Excessive or reduced alternator output
IMPORTANT:
The LOW Oil sender is not moni-
tored by the
EMM.
This sender connects directly
to the
SystemCheck
gauge.
Activation
When a sensor or switch provides the
EMM
with a
specific fault signal, it responds by interrupting
fuel injector and ignition operation. This results in
a gradual reduction in engine RPM until the
engine speed reaches 1200 RPM. The warning
horn sounds and the appropriate
SystemCheck
light turns on. As long as
S.A.F.E.
is activated, the
engine will run normally below 1200 RPM. Above
1200 RPM, the engine will vibrate excessively.
Conditions that initiate
S.A.F.E.
Recovery
The engine will operate in
S.A.F.E.
as long as the
fault condition exists. To recover from
S.A.F.E.
,
two conditions must be satisfied: sensor or switch
parameters must be back within limits; and engine
RPM must be reduced to idle. The system will
immediately recover and engine operation will
return to normal.
SHUTDOWN MODE
Outboard “shutdown” will occur if specific faults
are detected by the
EMM
.
Conditions that initiate shutdown
To recover from shutdown mode, the
EMM
must
not detect the related fault at start-up.
IMPORTANT:
Shutdown related to code 57
requires the removal of the stored service code.
Use the diagnostic software program to erase a
code 57.
Code 57 occurs when the
EMM
detects abnor-
mally high RPM relative to the TPS position. This
condition could be caused by uncontrolled fuel
entering the combustion cycle. Before removing
the code and STARTING the outboard, seek out
and repair the cause.
•
Perform Fuel System Pressure Test on
p. 165. Seek out possible external fuel leakage
that could allow fuel and/or vapor to enter the
combustion cycle through the air intake (air
silencer).
•
Seek out possible internal fuel leakage from a
leaking injector and/or vapor separator vent
hose.
Code 17 Alternator 55 V below expected range
Code 18 Alternator 55 V above expected range
Code 25
EMM
temperature above expected
range
Code 34 Oil injector open circuit
Code 38 No oil pressure feedback
Code 43 Engine temperature sensor above
expected range
Code 29 Excessive
EMM
temperature
Code 31 Excessive engine temperature
Code 33 Excessive no oil condition
Code 57 High RPM with low TPS setting
WARNING
If the engine shuts OFF and the “CHECK
ENGINE” or “CHK ENG” or EMM SENSOR
FAULT LED light is flashing, the engine
cannot be restarted. A hazardous fuel con-
dition may exist which could potentially
result in a fire or explosion.