Yamaha WR450Fv2008, Owner'S Service Manual

Page: 204 / 220

7-7
ELECTRIC STARTING SYSTEM
CHECKING THE COUPLERS AND
LEADS CONNECTION
1. Check:
•
Couplers and leads connection
Rust/dust/looseness/short-circuit
→
Repair or replace.
CHECKING THE STARTER
MOTOR OPERATION
1. Connect the positive battery ter-
minal "1" and starter motor lead
"2" with a jumper lead "3".
Not operate
→
Repair or replace
the starter motor.
• A wire that is used as a jumper
lead must have at least the same
capacity or more as that of the
battery lead, otherwise the jump-
er lead may burn.
•
This check is likely to produce
sparks, therefore make sure
nothing flammable is in the vicin-
ity.
CHECKING THE STARTING
CIRCUIT CUT-OFF RELAY
1. Remove:
•
Starting circuit cut-off relay
2. Inspect:
• Starting circuit cut-off relay con-
duction
Use 12 V battery.
Not conductive while the battery is
connected
→
Replace.
Conductive while the battery is not
connected
→
Replace.
Set the tester selection position to
"
Ω
× 1".
CHECKING THE STARTER RELAY
1. Remove:
• Starter relay
2. Inspect:
• Starter relay conduction
Use 12 V battery.
Not conductive while the battery is
connected
→
Replace.
Conductive while the battery is not
connected
→
Replace.
Set the tester selection position to
"
Ω
× 1".
CHECKING THE CLUTCH SWITCH
1. Inspect:
•
Clutch switch conduction
Not conductive while it is pulled
→
Re-
place.
Conductive while it is freed
→
Re-
place.
Set the tester selection position to
"
Ω
× 1".
CHECKING THE DIODE
1. Remove the diode from wire har-
ness.
2. Inspect:
• Diode continuity
Use pocket tester (tester selec-
tion position
Ω
× 1)
Incorrect continuity
→
Replace.
CHECKING THE START SWITCH
1. Inspect:
• Start switch conduction
Not conductive while it is pushed
→
Replace.
Conductive while it is freed
→
Re-
place.
Set the tester selection position to
"
Ω
× 1".
Battery (+) lead
→
Blue/Black lead
"1"
Battery (-) lead
→
Brown lead "2"
Tester (+) lead
→
Blue/White lead
"3"
Tester (-) lead
→
Black lead "4"
Result
Conductive (while the
battery is connected)
Battery (+) lead
→
Starter relay
terminal "1"
Battery (-) lead
→
Starter relay ter-
minal "2"
Tester (+) lead
→
Starter relay ter-
minal "3"
Tester (-) lead
→
Starter relay ter-
minal "4"
Result
Conductive (while the
battery is connected)
Tester (+) lead
→
Black lead "1"
Tester (-) lead
→
Black lead "2"
Result
Conductive (while the
clutch lever is pulled)
Tester (+)
→
Blue/Red
terminal "1"
Tester (-)
→
Sky blue
terminal "2"
Continu-
ous
Tester (+)
→
Blue/Red
terminal "1"
Tester (-)
→
Blue/Yel-
low terminal "3"
Continu-
ous
Tester (+)
→
Sky blue
terminal "2"
Tester (-)
→
Blue/Red
terminal "1"
No con-
tinuous
Tester (+)
→
Blue/Yel-
low terminal "3"
Tester (-)
→
Blue/Red
terminal "1"
No con-
tinuous
Tester (+) lead
→
Black lead "1"
Tester (-) lead
→
Black lead "2"
Result
Conductive (while the
start switch is pushed)