63
Engine Management Module (EMM)
External Sensors
4
Crankshaft Position Sensor
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:
•
Below 2000 RPM:
5 occurrences
•
Above 2000 RPM:
1 occurrences
the
EMM
:
Approximate air gap between CPS and flywheel
encoder ribs is 0.073 (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.
Knock Sensor
Knock sensors (one per cylinder head) detect the
presence of knock (pre-ignition or detonation)
during the combustion cycle.
When knock is detected, the
EMM
temporarily
increases fuel flow and retards ignition timing for
the affected cylinder.
If knock continues, the
EMM
:
If the sensor circuit is OPEN, the EMM:
Neutral/Shift Interrupt Switch
A switch mounted on the powerhead signals the
EMM
when the shift linkage is moved from FOR-
WARD or REVERSE into NEUTRAL.
A cam on the powerhead shift arm closes the
switch in NEUTRAL, completing a ground circuit
to the
EMM
. This signal is used to control:
•
Neutral RPM limit
•
Shift Interrupt function.
The shift interrupt function shuts off fuel and spark
to three cylinders for approximately one second to
reduce drivetrain loads and ease shifting, then
immediately restores normal engine operation.
The switch must be released to its open position
before the shift interrupt function can be activated
again. This circuit does not function above 2500
RPM.
If the switch is stuck in the closed position, the
EMM
:
Stores service code 16
EMM
LED 2: OFF (Cranking)
EMM
LED 3: ON (Running)
Activates
S.A.F.E.
Stores service code 1-6 (code indicates cyl)
Engine Monitor CHECK ENGINE display: ON
Stores service code 7 (port sensor)
Stores service code 8 (stbd sensor)
EMM
LED 3: OFF (Cranking)
EMM
LED 3: ON (Running)
Engine Monitor CHECK ENGINE display: ON
1.
Switch, neutral/shift interrupt
2.
Cam
008366
Stores service code 28
EMM
LED 3: ON (Running)
1
2
Summary of Contents for EVINRUDE E-TEC BE225HGXABA
Page 163: ...Oiling System Oil Supply Diagrams 163 8 008208R Port Side View Starboard Side View ...
Page 165: ...Oiling System Oil Supply Diagrams 165 8 008432R Port Side View Starboard Side View ...
Page 167: ...Oiling System Oil Recirculation Diagrams 167 8 008207R Starboard View Port View ...
Page 251: ...Powerhead Powerhead Views 251 11 Powerhead Views Port Hose Routings 3 3 L models 007153 ...
Page 252: ...252 Powerhead Powerhead Views Starboard Hose Routings 3 3 L models 007154 ...
Page 253: ...Powerhead Powerhead Views 253 11 Port Hose Routings 3 4 L models 008503 ...
Page 254: ...254 Powerhead Powerhead Views Starboard Hose Routings 3 4 L models 008502 ...
Page 255: ...Powerhead Powerhead Views 255 11 Port 3 3 L models 008448 ...
Page 256: ...256 Powerhead Powerhead Views Starboard 3 3 L models 008449 ...
Page 257: ...Powerhead Powerhead Views 257 11 Port 3 4 L models 008441 ...
Page 258: ...258 Powerhead Powerhead Views Starboard 3 4 L models 008442 ...
Page 259: ...Powerhead Powerhead Views 259 11 Front 3 3 L models 008450 ...
Page 260: ...260 Powerhead Powerhead Views Front 3 4 L models 008439 ...
Page 261: ...Powerhead Powerhead Views 261 11 Rear 3 3 L models 007142 ...
Page 262: ...262 Powerhead Powerhead Views Rear 3 4 L models 008440 ...
Page 263: ...Powerhead Powerhead Views 263 11 Top 008438 ...
Page 264: ...264 Powerhead Powerhead Views Starboard ICON models 008504 ...
Page 269: ...Midsection Service Charts 269 12 Muffler 004117R ...
Page 320: ...S 322 ...