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ENGINE MANAGEMENT MODULE (EMM)
EXTERNAL SENSORS
4
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 0.78 volts when the
key is turned to ON, or the recoil starter is pulled,
the EMM:
If the outboard starts, the code is saved.
If code 11 is present as both a Active Fault and a
Occurred Fault, refer to Control Cable Installa-
tion on p. 23. For tiller models, refer to Throttle
Cable Adjustment on p. 273, or Throttle Cable
Adjustment on p. 284.
If the TPS or TPS circuit fails (below 0.14 volts or
above 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
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 occurrences), the EMM:
Approximate air gap between CPS and flywheel
encoder ribs is 0.073 inch (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.
Neutral Switch
The powerhead mounted neutral switch controls a
ground signal from the EMM to indicate shift link-
age position. This allows the EMM to control idle
speed variations and start in gear protection. Fuel
and ignition functions are turned off if the neutral
switch is not closed.
If the starter is cranked while the outboard is in
gear, or if the switch fails, the EMM:
The Monitor screen of the diagnostics software
displays switch position, NEUTRAL or IN GEAR.
Make sure switch is operating properly.
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 2: OFF (Cranking)
EMM LED 3: ON (Running)
Stores service code 19
EMM LED 3: OFF (Cranking)
Engine Monitor CHECK ENGINE display: ON
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