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5.
Engine Alarms and Instrumentation
Digital Alarms
If, for any reason, one or more of these sensors or associated
wiring malfunctions, the ECM's built in self-diagnostic system sets
a trouble code and turns on the Malfunction Indicator Light (MIL)
or sounds a buzzer to alert the operator of a malfunction.
The MIL, buzzer and gauges can signal that something is wrong
before it becomes serious enough to cause an expensive repair.
Paying attention to the MIL, buzzer and gauges could also save
you or others from injury. The MIL may be replaced by verbiage
such as "Service Required" on boats equipped with electronic
instrumentation.
The MIL or "Service Required" notice comes on when there is a
problem with an engine function. Gauges can also indicate when
there is a problem with an engine functions. Often gauges and the
MIL (Service Required) work together to let you know that there is
a problem with your engine.
In most cases, when the "MIL" is on, the engine(s) may lose some
performance and/or efficiency, but remain running adequately.
Also, the light may go out or become intermittent, but a trouble
code will be logged for future diagnosis. In any case, the operator
must obtain service by an authorized dealer to determine and
repair the exact cause of the malfunction.
The engine ECM is programmed to control the engine alarm
system. This system is configured to turn on an instrument
panel mounted indicator ("MIL" or "Check Engine") light, and,
optionally, an audible ("buzzer") alarm to warn the operator of
engine problems.
10
If the "MIL" lights and/or the "buzzer" sounds during opera-
tion, the operator should scan the instrument panel readings for
possible sources of trouble. Conditions that may cause alarm ac-
tivation include:
• Low Oil Pressure
• Engine Overheat (High Temperature)
• Electronic Throttle Malfunction
• Engine Misfire
See Section 11: Engine Diagnostics and Codes for more
information.
If the boat is equipped with CAN-Buss Messaging (Electronic
Instrumentation), the main screen will likely display a "Service
Required" message when the ECM records an active trouble code.
IMPORTANT: A failure with the Electronic Throttle will result in
idle only operation of the engine. In some cases, the throttle may
be reset by turning the key off and then restarting the engine.
The operator should contact his servicing dealer to determine the
exact cause of the failure.
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