Yamaha YW125Y_ Utility Trailer User Manual


 
7-12
-+
ELEC
8 Measure the primary coil resistance.
Primary coil resistance
2.16 ~ 2.64
ΩΩ
ΩΩ
Ω at 20°C (68°F)
8 Connect the pocket tester (Ω × 1k) to the
ignition coil as shown.
Negative tester probe
JJ
JJ
J orange
22
22
2
Positive tester probe
JJ
JJ
J spark plug lead
11
11
1
8 Measure the secondary coil resistance.
Secondary coil resistance
8.64 ~ 12.96 k
ΩΩ
ΩΩ
Ω at 20°C (68°F)
8 Is the ignition coil OK?
YES NO
Replace the ignition
coil.
IGNITION SYSTEM
EAS00748
7. Crankshaft position sensor resistance
8 Disconnect the crankshaft position sensor
coupler from the wire harness.
8 Connect the pocket tester (Ω × 100) to the
crankshaft position sensor coupler as
shown.
Positive tester probe
JJ
JJ
J white/red
11
11
1
Negative tester probe
JJ
JJ
J white/blue
22
22
2
8 Measure the crankshaft position sensor re-
sistance.
Crankshaft position sensor resis-
tance
248 ~372
ΩΩ
ΩΩ
Ω at 20°C (68°F)
(between white/red and white/
blue)
8 Is the crankshaft position sensor OK?
YES NO
Replace the crank-
shaft position sensor/
stator assembly.
1
2
1
2
W/R
W/L
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