81
SYSTEM ANALYSIS
IGNITION OUTPUT TESTS
5
Crankshaft Position Sensor (CPS)
Test
When the CPS is working properly , EMM LED 2
turns on while the outboard is being started.
Use the Evinrude Diagnostics software CPS Sync
and engine RPM displays to confirm a valid CPS
signal while the outboa rd is cranking or running.
An RPM display higher than zero indicates a CPS
signal to the EMM.
If the Monitor screen says “Check CPS Sync,”
refer to Crankshaft Position Sensor (CPS) Test
on p. 94.
System Voltage Test
The ig nition system is po wered by the 55 V sys-
tem.
Use the Evinrude Diagnostics so ftware Monitor
screen to check system voltage.
Results:
• EMM ON (not running) - 30 V ± 2, system volt-
age is GOOD.
• EMM ON (not ru nning) - less tha n 30 V ± 2,
check 12 V power to EMM. Repair conne ction
or wiring. Possible fault in EMM SAC circuit.
• RUNNING - 55 V ± 2, system voltage is GOOD.
• RUNNING - less tha n 55 V ± 2, check st ator
output to EMM. Rep air connection o r wirin g.
Possible faulty stator or EMM. Refer to STATOR
TESTS on p. 96.
IMPORTANT: The EMM must be ON for voltage
to be present on the system voltage (55 V) circuit.
Power is normally supplied to the EMM when the
key switch is turned ON. The EMM is also turned
ON when it begins to receive AC voltage from the
stator while the outboard is being cranked.
Engine Monitor Screen, Engine RPM display 008566
Engine Monitor Screen, System Voltage 008566
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