Internal Emm Functions - Evinrude E-Tec 40 HP Service Manual

ENGINE MANAGEMENT MODULE (EMM)

INTERNAL EMM FUNCTIONS

INTERNAL EMM
FUNCTIONS
ROM Verification
The EMM perfo rms a se lf-test of programming
every time it is tu rned ON. Service code 15 ind i-
cates a programming (software) issue. Re pro-
gram the EMM with the correct software program
to correct the problem.
Idle Controller
The idle controller reacts to engine operating con-
ditions. Fu el an d ign ition timings are a ltered to
maintain a specific RPM when e ngine is cold or
warm. The contro ller is inactive when TPS is
advanced from idle position.
RPM Limiter
This fea ture of EMM p rogramming prevents
engine dama ge due to excessive RPM. At 62 50
RPM, fuel and ignition to the cylinders is shut off.
Normal op eration resumes when engine RPM
returns to the specified range.
Neutral RPM Limiter
This featu re prevents engine damage due to
excessive RPM if accelera ted in NEUTRAL. Neu-
tral engine speed is limited to 1800 RPM.
60
Exhaust Water Valve Activation
(60 - 65 HP)
During acceleration, the EMM opens a valve that
injects water into the exhaust housing. This wa ter
changes the tuning of the
engine to develop more midra nge horsepower as
the boat comes on plane.
Two conditions must be met to activate the valve:
Throttle opening above 80%
•
RPM between 2500 to 4600.
•
The valve may not activate if the engine is acce l-
erated slowly.
Engine Monitor and Warning
Systems
Refer to ENGINE MONITOR SYSTEM on p. 61.
Refer to S.A.F.E. WARNING SYSTEM on p. 62.
Refer to SHUTDOWN MODE on p. 62.
Fault Code Creation and Storage
Refer to the EMM Service Code Chart at the
back o f this ma nual for a complete list
engine fault codes.
exhaust, allowing the
of all