Yamaha TZ250M1 Owner's Service Manual page 262

FUEL PUMP SYSTEM
2. Inspect:
• Fuel pump relay conduct
Use 12V battery.
&
Battery (+) lead ≥
Battery (-) lead ≥
Tester (+) lead ≥
Tester (-) lead ≥
v
Connected
to battery
Not
connected
to battery
Continuous while connected to the battery ≥
Replace.
Not continuous while not connected to the bat-
tery ≥ Replace.
%
3. Inspect:
• Fuel pump relay resistance
Out of specification ≥ Replace.
Tester (+) lead ≥
Tester (-) lead ≥
?
Fuel pump relay
resistance
72~80 Ω at
20˚C (68˚F)
EC674000
FUEL PUMP OPERATION
C C CAUTION:
Do not operate the fuel pump on an empty
fuel tank because it may damage the pump.
1. Loosen the drain plug (carburetor) and
drain the fuel from the float chamber.
6-18
ELEC
≥ Black lead 1 1
≥ Green lead 2 2
≥ Black/Blue lead 3 3
≥ Brown lead 4 4
B/L Br Tester selector
3 3 4 4
position
Ω X X 1
≥ Green lead 1 1
≥ Black lead 2 2
Tester selector
position
Ω X X 10