Checking The Engine Ecm Circuit - Yamaha F30B 2018 Service Manual

f. Connect the positive battery lead to the
connector "a", and the negative battery
lead to the connector "b", and then check
for continuity between the connectors "c"
and "d". Replace the relay if out of specifi-
cation.
Do not reverse the battery leads.
1
1 2 3 4 5 6 7 8
a
R
Y
P
W
b
Test harness FWY–6 "2"
90890-06872
Test harness FWY–6 "2"
YB-06872
Relay terminals continuity
"c"
g. Turn the engine start switch to OFF.
h. Connect the positive battery lead to the
connector "a", and the negative battery
lead to the connector "b", and then check
for continuity between the connectors "c"
and "d". Replace the relay if out of specifi-
cation.
Do not reverse the battery leads.
2
B
d
L
Br
O
c
"d"
5-18
Engine control unit and component
b
1 2 3 4 5 6 7 8
R
Y
P
W
Relay terminals continuity
"c"
i. Disconnect the special service tool.
j. Connect the main relay coupler.
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Checking the engine ECM circuit

1. Disconnect:
• Engine ECM coupler "a" and "b"
a
d
B
a
L
Br
O
c
"d"
b