BRP EVINRUDE E-TEC BE50DPLABA, Service Manual

Page: 89 / 422

89
SYSTEM ANALYSIS
FUEL DELIVERY TESTS
5
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. 89.
Some injectors actuate; some do not:
•
For non-working injectors, test the resistance of
injector circuit between the injector connector
and injector control wire at the
EMM .
•
See Fuel Injector Resistance Test on p. 143.
All injectors actuate:
•
Refer to Running Fuel System Tests on p. 89.
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. 101.
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.
Results:
No light activation on any injector wires (outboard
cranks and starter turns flywheel):
•
Check stator input to EMM , CPS operation, and
all grounds and wiring connections.
•
Eliminate all other possibilities to isolate a faulty
EMM .
Irregular or no light activation on some injector
wires:
•
Test the resistance of individual injector circuits
between the injector connector and injector con-
trol wire at the
EMM .
•
Check battery cable connections.
•
Make sure all grounds are clean and tight.
•
See Fuel Injector Resistance Test on p. 143.
Steady light activation on all injector wires and
consistent voltage readings,
EMM injector control
function is good:
•
Use the diagnostics software Dynamic Fuel Test
to isolate a faulty cylinder. See DYNAMIC
TESTS on p. 80.
•
Refer to Fuel Injector Pressure Test on p. 142.
•
Refer to Fuel System Pressure Test on p. 141.
Dynamic Tests Screen 008570A