BRP E 250 L HO AG B, Service Manual

Page: 84 / 460

Engine and Control Systems
Throttle, Shift and Steering Control Systems
84
RPM Limiter
This feature of EMM programming prevents
engine damage due to excessive RPM.
At 6250 RPM, fuel and ignition to the cylinders is
shut off. Normal operation resumes when engine
RPM returns to the specified range.
Neutral RPM Limiter
This feature prevents engine damage due to
excessive RPM if accelerated in NEUTRAL. Neu-
tral engine speed is limited to 1100 RPM.
Engine Monitor and Warning Systems
Refer to Engine Monitor System on p. 88.
Refer to S.A.F.E. on p. 89.
Refer to Shutdown Mode on p. 89.
Fault Code Creation and Storage
Refer to the Fault Code Chart at the back of this
manual for a complete list of all engine fault
codes.
Throttle, Shift and Steer-
ing Control Systems
Shift and throttle information is transmitted and
received between the
EMM and ICON II remote
control system via a dedicated Controller Area
Network (CANbus), known as the remote control
network, or private network. For safety, informa-
tion is also shared on a
NMEA 2000 network as
backup.
Sensor inputs and internal EMM controllers are
used to control the operation of the outboard’s
shift and throttle functions.
Use Evinrude Diagnostics software to trouble-
shoot the sensors. Refer to the Fault Code Chart
for a complete list of all control system fault codes.
Reprogramming or replacement may be required
to resolve
EMM related issues.
Electronic Throttle Controller
The EMM receives inputs from the remote control
via the remote control network. The EMM trans-
mits the input signals to the Electronic Throttle
Controller (ETC). The ETC processes the inputs
and sends signals to the Electronic Throttle Body
(ETB). The ETB converts the signals to movement
of the throttle plate. The ETB consists of a motor
assembly, throttle plate and two Throttle Position
Sensors (TPS), “TPS A” and “TPS B”.
Each TPS receives a voltage signal from the
EMM . As the throttle lever is rotated, the EMM
receives a return voltage signal through a second
wire. A third wire provides a ground circuit back to
the
EMM .
TPS A and TPS B voltages are correlated. As the
throttle plate opens, TPS A voltage increases and
TPS B voltage decreases. As the throttle plate
closes, TPS A voltage decreases and TPS B volt-
age increases.