Evinrude E-Tec 40 HP, Service Manual

Page: 77 / 426

75
SYSTEM ANALYSIS
DIAGNOSTIC PROCEDURES
5
Troubleshooting
Outboard will not crank, starter does not
operate:
•
Check co ndition of batt ery and cables (ma in
battery switch and cables). Make sure battery
cables are not reversed.
•
Confirm that switched B+ is present at “A” termi-
nal (yellow/red wire) of starter solenoid with key
switch in the START position.
•
Check ground at “B” te rminal harness connec-
tion.
•
Refer to
ELECTRIC START TESTS
on p. 102.
Repair starter or start circuit as needed.
Outboard cranks, will not start:
•
Check emergency stop switch and lanyard
•
Check powerhead mounted neutral switch
•
Check the
EMM
LED Indicators for system sta-
tus information. Refer to
EMM LED INDICA-
TORS
on p. 77.
•
Use the
Evinrude Diagnostics
sof tware
Occurred Faults
screen to check for current ser-
vice codes. If there are multiple occurred sensor
codes, inspect all 5 V sensor circuits for broken
or grounded wiring.
•
Perform a Static Ign ition test using
Evinrude
Diagnostics
so ftware and a n ind uctive t iming
light. Refer to
Static Ignition Test
on p. 81.
•
If ignition test indicates steady sp ark, refer to
FUEL DELIVERY TESTS
on p. 84.
Outboard runs, low on power, misfires:
•
Check the
EMM
LED Indicators for system sta-
tus information. Refer to
EMM LED INDICA-
TORS
on p. 77.
•
Use the
Evinrude Diagnostics
software
Monitor
screen to check syste m (55 V) and TPS vo lt-
ages. System volt age should b e steady , a nd
TPS voltage should be between 0.2 and 4.85 V.
IMPORTANT:
Use a digital multimeter to check
voltage on external circui ts only when necessary.
All
EMM
output currents are DC current.
•
Use the diagnostics software
Dynamic Tests
to
isolate a faulty cylinder. See
DYNAMIC TESTS
on p. 76.
•
Use an inductive timing light to check ig nition
and fuel injector circuits. Refer to
Running Igni-
tion Tests
on p. 82 and
Running Fuel System
Tests
on p. 85.
•
Use the diagn ostics software
Fuel Control
Adjustment
test to help identify a cylind er that
may be too rich or too lea n. Refer to
Fuel Con-
trol Adjustment
on p. 76.
•
Use an inductive amp meter to monitor injector
circuit current. Compare readings of all circuits
to identify possible failure.
•
Check fuel quality and that fuel is present at
injectors.
•
Use the diagnostics software
Logging
fun ction
to record engine data as a problem is occurring.
•
AFTER all the above inspections, if the cause of
a running quality problem still cannot be identi-
fied, perform a compression test to check for
internal powerhead damage.
IMPORTANT:
Remove a cylinder head or disas-
semble the engine only as a last resort.
Logging Screen
008574