Evinrude & Johnson E75DPLSCB, Service Manual

Page: 112 / 349

110
SYSTEM ANALYSIS
IGNITION OUTPUT TESTS
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 outboard 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. 124.
System Voltage Test
The ignition system is powered by the 55 V sys-
tem.
Use the Evinrude Diagnostics software Monitor
screen to check system voltage.
Results:
•
KEY ON (not running) - approximately 1 V less
than battery voltage, system voltage is GOOD.
•
KEY ON (not running) - no voltage, check 12 V
power to
EMM. Repair connection or wiring.
•
RUNNING - 55 V ± 2, system voltage is GOOD.
•
RUNNING - less than 55 V ± 2, check stator
output to
EMM . Repair connection or wiring.
Possible faulty stator or EMM. Refer to
STA-
TOR TESTS
on p. 126.
IMPORTANT:
The EMM must be ON for volt-
age 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 volt-
age from the stator while the outboard is being
cranked.
Engine RPM and CPS Sync displays
006539
Monitor Screen, System voltage
006539