BRP E250DHLSCS, Service Manual

Page: 123 / 396

121
SYSTEM ANALYSIS
FUEL DELIVERY TESTS
6
If the pump does not run:
•
The
EMM
controls power to the fuel pump (pur-
ple/black wire). Check voltage at pin 1 of fuel
pump connector. Voltage should be 12 V when
KEY is first ON, when fuel pump test activated,
or when outboard is cranking or running.
•
Use an ohmmeter to check continuity between
pin 2 of fuel pump connector and ground.
•
Refer to
Circulation Pump Resistance Test
on p. 172.
If the pump runs:
•
Refer to
Fuel System Pressure Test
on
p. 170.
•
Refer to
Running Fuel System Tests
on
p. 121.
Fuel Injector Static Test
Use the
Evinrude Diagnostics
software Fuel Injec-
tor Static Test to activate each fuel injector. Listen
for an audible “click” from each injector when it is
actuated. If the injector activates, the
EMM
and
injector circuits are not at fault.
IMPORTANT:
This test is operating the injec-
tors with 30 V on the system voltage (55 V) circuit.
The start assist circuit (SAC) of the
EMM
converts
battery voltage (12 V) to 30 V of system voltage.
Battery must be fully charged and connections
must be clean and tight. Injector activation should
be carefully confirmed.
Results:
No injectors actuate:
•
Use the
Monitor
screen of the diagnostics soft-
ware to make sure voltage is present on the
system voltage circuit.
•
Refer to
Running Fuel System Tests
on
p. 121.
Some injectors actuate; some do not:
•
Test the resistance of individual injector circuits
between the injector connector and injector con-
trol wire at the
EMM
.
•
See
Fuel Injector Resistance Test
on p. 172.
All injectors actuate:
•
Refer to
Running Fuel System Tests
on
p. 121.
Running Fuel System Tests
Run or crank the outboard.
Use the
Evinrude Diagnostics
software
Monitor
screen to check system voltage. If voltage is low,
or drops as RPM increases, refer to
Stator Volt-
age Output Test
on p. 132.
Use an inductive timing light to monitor the injec-
tor control wire (connector pin 2) for each injector.
Make sure the pickup is attached to only one wire.
Flashes on the timing light indicate current in the
circuit is being switched by the
EMM
. The
Dynamic Tests
screen allows the control signal to
be turned off to a particular injector.
IMPORTANT:
Some timing lights may not flash
consistently at cranking speeds. Always check the
orientation of the timing light pickup and the oper-
ation of the timing light.
Static Tests Screen
006813