Ignition Control Circuit Tests; Ignition Coil Tests - BRP Evinrude E-TEC Series Service Manual

Ignition Control Circuit Tests

Use a digital multimeter to test the following:
•
System voltage supply to ignition coil.
•
Ignition control signal from EMM.
•
Engine harness resistance.
Disconnect ignition coil connector.
Supply voltage test:
Use an appropriate adapter to connect the red
meter lead to pin 3 (white/red) of the engine har-
ness connector and the black lead to ground. With
EMM ON, voltage should be approximately 1 V
less than battery voltage.
Control signal test:
Set meter to the Hz scale to check ignition control
signal.
Use an appropriate adapter to connect the red
meter lead to pin 2 (orange) of the engine harness
connector and the black lead to ground. Activate
diagnostics software Static Ignition test and
observe meter for consistent reading (approxi-
mately 2 Hz).
If control signal is present, connect black meter
lead to pin 1 and repeat test to confirm harness
ground.
Harness resistance test:
If control signal is NOT present, calibrate multime-
ter to low ohms scale. Use appropriate adapters
on meter leads to avoid damaging harness con-
nectors.
With EMM OFF, remove the EMM J1-A connector
and test the continuity of each ignition control cir-
cuit (orange). Check resistance between J1-A
connector and ignition coil connector. Refer to
engine wiring diagram.
If circuits test good, replace EMM.

Ignition Coil Tests

There are no simple ignition coil tests available.
Before replacing an ignition coil, be sure:
•
55 V is supplied to the white/red wire of the igni-
tion coil connector
•
A control signal is present on the orange wire of
the ignition coil connector. Refer to Ignition
Control Circuit Tests on p. 77.
•
The black wire of the ignition coil connector pro-
vides continuity to ground.
•
The secondary spark plug lead provides conti-
nuity.
If all of the above tests are good, and a cylinder
does not have spark, replace the ignition coil with
a known good coil.
007399
SYSTEM ANALYSIS
IGNITION OUTPUT TESTS
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