Yamaha Scorpio Service Manual page 220

7.Source coil resistance
Disconnect the CDI magneto coupler from
G
the wire harness.
Connect the pocket tester (Ω × 100) to the
G
source coil.
Tester (+) lead → Brown 1 terminal
Tester (–) lead → Green 2 terminal
3 CDI magneto
Measure the source coil resistance.
G
Source coil resistance:
688 ~ 1,032 Ω at 20°C
8.Pickup coil resistance
Disconnect the CDI magneto coupler from
G
the wire harness.
Connect the pocket tester (Ω × 100) to the
G
pickup coil.
Tester (+) lead → Red 1 terminal
Tester (–) lead → White 2 terminal
3 CDI magneto
Measure the pickup coil resistance.
G
Pickup coil resistance:
248 ~ 372 Ω at 20°C
9.Wiring connection
Check the entire ignitions system for con-
G
nections.
Refer to the "WIRING DIAGRAM" section.
CDI unit is faulty. Replace it.
*
C0NTINUITY
MEETS
SPECIFICATION
MEETS
SPECIFICATION
CORRECT
IGNITION SYSTEM
OUT OF SPECIFICATION
Replace source coil.
OUT OF SPECIFICATION
Replace pickup coil.
POOR CONNECTION
Correct.
7 - 12
– +
ELEC