Ignition And Electrical Circuits - BRP Evinrude E-Tec Series Service Manual

SYSTEM ANALYSIS

IGNITION AND ELECTRICAL CIRCUITS

IGNITION AND
ELECTRICAL CIRCUITS
Following is a complete list of circuits required for
ignition output:
Stop Circuit
Outboard running: black/yellow wire NOT
•
grounded (emergency stop switch lanyard in
place).
Battery
Battery switched B+ input to power up EMM
•
Battery B+ input to Start Assist Circuit (SAC) of
•
EMM
Stator Output Voltage
Provides EMM J2 connector with A/C voltage:
•
Outboard cranking, typical range is 20-40 VAC
(AC output voltage is related to cranking RPM
outboard running approximately 55 VAC.
EMM
Start Assist Circuit (SAC) of EMM converts bat-
•
tery voltage (12 V) to 30 V for system circuit
(55 V).
Stator output to EMM provides voltage to
•
EMM's internal power supply.
EMM digital ground, battery grounds, ignition
•
grounds, and injector grounds must be func-
tional.
Crankshaft Position Sensor
Provides EMM with input.
•
Outboard cranking speed exceeds 75 RPM and
•
a steady CPS signal is generated.
126
Alternator Output/System Voltage
System voltage from EMM (white/red) provides
•
55 VDC to the oil injection pump, the fuel injec-
tors, and the ignition module of EMM.
Capacitor
Connected to 55 V circuit (white/red) to stabilize
•
current on 55 V circuit.
Negative terminal
•
grounded.
Ignition Primary Voltage
Output from EMM.
•
EMM provides -200 VDC ± 10 V output to
•
orange ignition primary wires during cranking.
;
)
Engine Monitor Screen, Ignition Voltage
Peak reading voltmeters must be
IMPORTANT:
set to "NEG" and "500" settings to measure igni-
tion voltage.
Ignition Coil
EMM provides input to primary winding of coil.
•
Output from ignition coil secondary winding and
•
high tension spark plug wire.
of capacitor must
005141
be