Yamaha 5YF2-AE1 Service Manual page 240

EBS01060
10.Diode
• Remove the diode from the coupler.
• Connect the pocket tester (Ω × 1) to the
diode terminals as shown.
• Check the diode for continuity as follows.
Positive tester probe →
green/yellow 1
Negative tester probe →
black/yellow 2
Positive tester probe →
black/yellow 2
Negative tester probe →
green/yellow 1
1
2
NOTE:
_
When you switch the tester's positive and
negative probes, the readings in the above
chart will be reversed.
• Are the testing readings correct?
YES
ELECTRIC STARTING SYSTEM
Continuity
No
continuity
G/Y
B/Y
NO
Replace the diode.
EBS01059
11.Wiring
• Check the entire starting system's wiring.
Refer to "CIRCUIT DIAGRAM".
• Is the starting system's wiring properly
connected and without defects?
The starting system
circuit is OK.
8 - 18
ELEC
YES
Properly connect or
repair the
system's wiring.
– +
NO
starting