89
ENGINE MANAGEMENT MODULE (EMM)
SENSORS AND FUNCTIONS
4
Oil Pressure Switch
The oil pressure switch monitors oil pressure in
the oil distribution manifold. The switch requires
approximately 7 psi (48 kPa) (nominal) to close.
If the switch fails to indicate pressure in the oil dis-
tribution manifold, the
EMM
:
If the switch indicates constant pressure (no
changes) in oil distribution manifold, the
EMM
:
Throttle Position Sensor
The throttle position sensor is a rotary potentiome-
ter connected to the throttle plate shaft. The sen-
sor receives a voltage signal 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
.
Refer to
TPS Calibration
on p. 143.
If the TPS sensor or circuit fails (below 0.15 volts
or above 4.95 volts), the
EMM
:
IMPORTANT:
Once 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 sensor circuit indicates below 0.2 volts,
the
EMM
:
If the TPS sensor circuit indicates above 4.85
volts, the
EMM
:
If the TPS sensor circuit indicates above 0.65
volts when the key is turned to the ON position,
the
EMM
:
If the outboard is started, the code is stored.
If code 11 is present as both a Hard Fault and a
Stored Fault, refer to
Control Cable Adjust-
ments
on p. 54.
Crankshaft Position Sensor
The CPS is a magnetic device. It is mounted in
the throttle body, adjacent to the flywheel.
Encoder rib spacing on the flywheel coincides with
crankshaft position. As the encoder ribs of the fly-
wheel pass the magnetic field of the CPS, an AC
voltage signal is generated. The
EMM
uses this
signal to identify crankshaft position 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 engine
Monitor
screen of the
Evinrude
Diagnostics Software program to check CPS
operation. The outboard should indicate an RPM
reading while cranking. If the CPS or its circuit
fails, no RPM reading will be generated and the
outboard cannot run.
Activates
S.A.F.E.
Stores a service code 38
Initiates
EMM
NO OIL / OVERHEAT LED
Initiates the
SystemCheck
NO OIL light
Stores a service code 32
Initiates
EMM
SENSOR FAULT LED
Stores a service code 12
Limits engine RPM to IDLE
Initiates
EMM
SENSOR FAULT LED
Initiates the
SystemCheck
CHECK ENGINE light
Stores a service code 13
Initiates
EMM
SENSOR FAULT LED
Stores a service code 14
Initiates
EMM
SENSOR FAULT LED
Initiates a service code 11
Stores a service code 16
Initiates
EMM
SENSOR FAULT LED
Содержание E-tec 75 HP
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Страница 16: ...16 INTRODUCTION NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
Страница 84: ...84 MAINTENANCE NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
Страница 122: ...122 SYSTEM ANALYSIS NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
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Страница 238: ...238 POWERHEAD NOTES NOTES Technician s Notes Related Documents Bulletins Instruction Sheets Other ...
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