Yamaha YZF-R1S Service Manual - Elec
8-26
CHARGING SYSTEM
ELEC
YES
NO
5. Stator coil resistance
S Remove the generator cover.
S Connect the pocket tester (Ω 1) to the sta-
tor coils as shown.
Replace the stator
coil assembly.
EAS00776
Positive tester probe
! white
Negative tester probe
! white
Positive tester probe
! white
Negative tester probe
! white
1
1
2
3
S Measure the stator coil resistances.
Stator coil resistance
0.14
X 0.18 Ω at 20_C (68_F)
S Is the stator coil OK?
YES
NO
6. Wiring
S Check the wiring connections of the entire
charging system.
Refer to “CIRCUIT DIAGRAM”.
S Is the charging system’s wiring properly con-
nected and without defects?
Properly connect or
repair the charging
system’s wiring.
EAS00779
Replace the rectifi-
er / regulator.
4. Stator coil lead
S Disconnect stator coil lead coupler.
S Connect the pocket tester (Ω 1) to the sta-
tor coil lead coupler as shown.
Positive tester probe
!
white
Negative tester probe
!
ground
3
Positive tester probe
!
white
Negative tester probe
!
ground
1
Positive tester probe
!
white
Negative tester probe
!
ground
No
continuity
2
YES
NO
Replace the stator
coil lead.
S Are the tester readings correct?