Checking The Engine Ecm; Checking The Ignition Coil - Yamaha F30B 2018 Service Manual

Checking the engine ECM

1. Measure:
• Engine ECM output peak voltage
Out of specification  Checking the pulser
coil.
Engine ECM output peak voltage
(reference data)
#1: Black/Orange (B/Or)–Black (B)
#2: Black/White (B/W)–Black (B)
#3: Black/Yellow (B/Y)–Black (B)
r/min
DC V
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a. Disconnect the ignition coil coupler "a".
b. Connect the special service tool "1".
c. While cranking the engine, measure the
peak voltage.
R/Y
B/Or
R/Y
B/W
B/Y
a
1
Unloaded
Cranking
100.0
Or
1
a
d. Disconnect the special service tool.
e. Connect the ignition coil coupler.
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Checking the ignition coil

1. Measure:
• Ignition coil resistance
Out of specification  Replace.
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a. Disconnect the ignition coil couplers.
a
b. Disconnect the spark plug caps from the
spark plugs.
c. Remove the spark plug caps from the igni-
tion coil.
d. Measure the ignition coil resistance.
B
A. Primary coil
B. Secondary coil
e. Install the spark plug caps to the ignition
coil.
f. Connect the spark plug caps and ignition
coil couplers.
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5-29
Ignition unit and component
Test harness SM6195043
90890-06861
Test harness SM6195043
YB-06861
Primary coil resistance
0.180–0.240 
Secondary coil resistance
3.26–4.88 k
B
A
B/Or
B/W
B/Y