Ignition Output Tests; Required Ignition Systems; Wiring Inspection - Evinrude E-Tec 40 HP Service Manual

IGNITION OUTPUT
TESTS
A
DANGER
The electrical system presents a serious
shock hazard. Allow outboard to sit for
two minutes after running before handling
capacitor or 55 V electrical components.
Failure to handle capacitor properly can
result in uncontrolled electrical discharge
and possible electrical shock to humans.
DO NOT handle primary or secondary igni-
tion components while outboard is run-
ning or flywheel is turning.
Use the Evinrude Diagnostics sof tware Occurred
Faults screen to check for current service code s
before troubleshooting. Correct any problems and
clear the codes FIRST.

Required Ignition Systems

Following is a comp lete list of circuit s required for
ignition output:
Stop Circuit
Black/yellow wire NOT
•
stop switch lanyard in place).
Neutral Switch
Powerhead mounted neutr al switch provides a
•
switched ground circuit to EMM. The circu it
enables spe cialized co ntrol fu nctions such as
neutral st art prot ection and RPM limiting in
NEUTRAL.
Stator Output Voltage
Provides A/C voltage to EMM J2 co nnector:
•
Outboard cranking, typ ical range is 20-40 VAC
(AC output voltage is related to cranking RPM
Outboard running, approximately 55 VAC.
EMM
Controls ignition grounds, injector grounds, and
•
engine timing.
grounded (eme rgency
;
)

IGNITION OUTPUT TESTS

Crankshaft Position Sensor
Provides EMM with input.
•
Outboard cranking sp eed exceeds 300 RPM
•
and a steady CPS signal is generated.
Alternator Output/System Voltage
System voltage from EMM (white/red) provides
•
55 VDC to the high pressure fu el pump, the oil
injection pump, th e fue l injectors, and the igni-
tion coils.
Capacitor
Connected to 55 V circuit (white/red) to stabilize
•
current on 55 V circuit
Negative terminal
•
grounded.
Ignition Coil
Primary circu its are powered by system (55 V)
•
voltage
EMM provides control signal to ignition coil
•
Output from ignition coil secondary winding and
•
high tension spark plug wire.

Wiring Inspection

Visually inspect all wi
grounds.
Use a digit al ohmmete r to test resist ance on all
ground circuits and connections. Ohmmeter read-
ings should be approximately 0.0 W.
Check that all engine wire harness g rounds have
continuity to the cylinder/crankcase.
1
1. Main engine harness ground
Clean or repair all ground circuits, wiring, and con-
nections as needed.
SYSTEM ANALYSIS
of cap acitor mu st be
ring, con nections, and
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