Yamaha YQ50 Service Manual page 160

TROUBLESHOOTING
NOTE :
• Remove the following parts before proceeding with the troubleshooting:
1) Side covers (left and right)
2) Footrest boards
3) Front panel
4) Handlebar cover
• For accurate troubleshooting use the following special tools:
Pocket tester :
90890-03112
1.Fuse
• Remove the fuse.
• Connect the pocket tester (Ω x 1) to the fuse.
• Check the fuse for continuity.
2.Battery
• Check the condition of the battery.
Refer to "BATTERY INSPECTION" in CHAP-
TER 3.
Open circuit voltage :
12.8 V or more at à 20
3.Starter motor
• Use a jumper lead E * to connect the (+) Q
terminal of the battery to the starter motor
terminal W.
M
• Check the starter motor operation.
IGNITION AND STARTING SYSTEM
STARTER MOTOR DOES NOT WORK
CONTINUITY
° °
C (68 F)
MEETS
SPECIFICATION
+ -
WORKS
8-10
NO CONTINUITY
Defect © Replace fuse.
DOES NOT MEET
SPECIFICATION
• Clean battery terminals.
• Charge or replace the battery.
*
CAUTION:
• If the gauge of the jumper lead is smaller
than that of the battery leads, the jumper
lead might melt or burn.
• This test could cause sparks. Never perform
it near a gas source or near flammable
products.
DOES NOT WORK
Starter defect © Repair or replace.
ELEC