Yamaha TZ250M1 Owner's Service Manual page 252

CHARGING SYSTEM
EC624000
COUPLERS AND LEADS CONNECTION
INSPECTION
1. Check:
• Couplers and leads connection
Rust/ Dust/ Looseness/Short-circuit ≥
Repair or replace.
EC682000
CHARGING VOLTAGE INSPECTION
1. Start the engine.
2. Inspect:
• Charging voltage
% Out of specification ≥ If no failure is found
in checking the source coil resistance,
check the voltage regulator.
Tester (+) lead ≥
≥ Black lead 2 2
Tester (-) lead ≥
?
Charging
voltage
14.2~15.2 V
at 5,000 r/min
EC683000
VOLTAGE REGULATOR INSPECTION
1. Check:
• Voltage regulator conduct
Use pocket tester (tester selection posi-
tion Ω X 1).
Tester (+)
W1
lead
Tester
1
(-) lead
W1 1
W2 2
X
R 3
X
B 4
D
"D" indicates continuity and "X" non-continu-
ity.
In case of continuity for "X" ≥ Replace.
In case of non-continuity for "D" ≥ Replace.
6-8
ELEC
≥ Red lead 1 1
Tester selector
position
DCV-20
W2 R B
2 3 4
X D X
D X
X X
D D