Yamaha WaveRunner FX SHO, Service Manual

Page: 290 / 433

E
ELEC
– +
7-13
3. Measure:
• ECM output peak voltage
Within specification
→
Replace the igni-
tion coil.
Below specification
→
Check the pickup
coil.
Refer to
“ Pickup coil. ”
WARNING
When checking the electrical components,
do not touch any of the connections of the
digital tester leads.
Measurement steps:
1. Disconnect the ignition coil couplers
1
.
2. Measure the ECM output peak voltage as
shown.
NOTE:
• If measuring the ECM output peak voltage
under the
“ Cranking ” condition, disconnect
the fuel injector couplers for all cylinders.
• To crank the engine, connect the engine
shut-off cord (lanyard) to the engine shut-off
switch, and then push the engine start
switch.
ECM output peak voltage:
#1 Black/red (B/R) –
Black (B)
#2 Black/white (B/W)
–
Black (B)
#3 Black/yellow (B/Y)
–
Black (B)
#4 Black/green (B/G)
–
Black (B)
r/min
Loaded
Cranking 2,000 3,500
V 2.5 2.6 2.6
B
#1 B/R
#2 B/W
#3 B/Y
#4 B/G
#1 B/R
#2 B/W
#3 B/Y
#4 B/G
R/Y
B
1
Ignition system