Yamaha PW50W 2007 Service Manual page 157

5. Pickup coil resistance
9Disconnect the pickup coil coupler from
the wire harness.
9Connect the pocket tester ("Ω×1" range) to
the pickup coil terminal as shown.
Positive tester probe → white/red 1
Negative tester probe → black 2
1
W/R B/R
W
9 Measure the pickup coil resistance.
Pickup coil resistance
18.0–22.0 Ω at 20°C (68°F)
(between white/red and black)
9 Is the pickup coil OK?
YES
2
B W
B
NO
Replace the stator
coil/pickup coil
assembly.
IGNITION SYSTEM
6. Charge coil resistance
9Disconnect the charge coil coupler from
the wire harness.
9Connect the pocket tester ("Ω×100" range)
to the charge coil terminal as shown.
Positive tester probe → black/red 1
Negative tester probe → black 2
1
W/R B/R
9Measure the charge coil resistance.
Charge coil resistance
297–363 Ω at 20°C (68°F)
(between black/red and black)
9Is the charge coil OK?
YES
7-7
ELEC
2
B W
B
W
NO
Replace the stator
coil assembly.