Yamaha TT-R90E Owner's Service Manual page 326

CHARGING SYSTEM
EC624000
COUPLERS AND LEADS CONNECTION
INSPECTION
1. Check:
CHARGING VOLTAGE INSPECTION
2
1. Start the engine.
2. Inspect:
W B
R Y/R
1
Tester (+) lead → Red lead 1
Tester (–) lead → Black lead 2
3. Inspect:
1
W Sb
Tester (+) lead → White lead 1
Y B
Tester (–) lead → Black lead 2
2
6 - 15
Couplers and leads connection
G
Rust/dust/looseness/short-circuit →
Repair or replace.
Charging voltage
G
Out of specification → If no failure is
found in checking the source coil resis-
tance, replace the rectifier/regulator.
Charging
voltage
14.0 ~ 15.0 V at
5,000 r/min
Lighting coil resistance
G
Out of specification → Replace.
Lighting coil
resistance
0.64 ~ 0.96 Ω at
20 ˚C (68 ˚F)
– +
ELEC
Tester selector
position
DCV-20
Tester selector
position
Ω × 1