BRP E250DHLSCS, Service Manual

Page: 99 / 396

97
ENGINE MANAGEMENT MODULE (EMM)
EXTERNAL SENSORS
5
Throttle Position Sensor
The throttle position sensor receives a voltage sig-
nal 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
.
If TPS voltage is greater than 0.65 V when the key
is turned to ON, the
EMM
:
If the outboard is started, the code is stored.
If the key ON voltage is greater than 0.78 V when
the engine is started, speed is limited to idle.
If code 11 is present as both a Hard Fault and a
Stored Fault, refer to
Control Cable Installation
on p. 53.
If the TPS or TPS circuit fails (less than 0.14 volts
or greater than 4.92 volts), the
EMM
:
IMPORTANT:
When a TPS circuit fault has
been detected, the outboard will not accelerate
above idle speed. To reset, stop the outboard and
correct the fault.
If the TPS circuit reads below 0.2 volts, the
EMM
:
If the TPS circuit reads above 4.85 volts, the
EMM
:
Crankshaft Position Sensor
The CPS is a magnetic device. It is mounted on
the reed plate, next to the flywheel.
Ribs spaced on the flywheel mark crankshaft posi-
tion. As the ribs pass the magnetic field of the
CPS, an AC voltage signal is generated. The
EMM
uses this signal to identify crankshaft posi-
tion and speed, generate a tachometer signal, and
control fuel and ignition timing.
If the sensor is damaged or the signal is intermit-
tent (10 instances), the
EMM
:
Approximate air gap between CPS and flywheel
encoder ribs is .073 (1.85 mm).
Use the
Evinrude Diagnostics
software
Monitor
screen to check CPS operation. The software
should show an RPM reading while the outboard
is cranking. If the CPS or its circuit fails, no RPM
reading will appear and the outboard cannot run.
Creates service code 11
Stores service code 12
Limits engine RPM to IDLE
EMM
LED 3: OFF (Cranking)
EMM
LED 3: ON (Running)
Engine Monitor CHECK ENGINE display: ON
Stores service code 13
EMM
LED 3: OFF (Cranking)
EMM
LED 3: ON (Running)
Engine Monitor CHECK ENGINE display: ON
Stores service code 14
EMM
LED 3: OFF (Cranking)
EMM
LED 3: ON (Running)
Engine Monitor CHECK ENGINE display: ON
Stores service code 16
EMM
LED 3: OFF (Cranking)
EMM
LED 3: ON (Running)