Yamaha YP250 Service Manual page 253

YP******
TROUBLESHOOTING
IF THE AUTO CHOKE FAILS
TO OPERATE.
Procedure
Check:
1. Fuse (Main)
2. Battery
3. Main switch
4. Engine stop switch
NOTE:
D Remove the following parts before trouble-
shooting.
1) Fuel tank
2) Footrest board
3) Cowling body
D Use the special tools specified in the trouble-
shooting section.
Pocket tester:
90890-03112
YP******
1. Fuse
Refer to "CHECKING SWITCHES" section.
YP******
2. Battery
S Check the battery condition.
Refer to "BATTERY INSPECTION" section
in CHAPTER 3.
YP******
3. Main switch
Refer to "CHECKING SWITCHES" section.
YP******
4. Engine stop switch
Refer to "CHECKING SWITCHES" section.
CONTINUITY
CORRECT
CONTINUITY
CONTINUITY
:
AUTO CHOKE SYSTEM
5. Thermo switch
6. Auto choke unit resistance
7. Voltage
8. Wiring connection
(entire auto choke system)
NO CONTINUITY
Repalce the fuse.
INCORRECT
S Clean battery terminals.
S Recharge or replace battery.
NO CONTINUITY
Replace the main switch.
NO CONTINUITY
Replace the right handlebar switch.
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