Yamaha YZF-R15, Service Manual

Page: 267 / 338

8-10 8-9
ELECTRIC STARTING SYSTEM ELECTRIC STARTING SYSTEM
TROUBLESHOOTING
The starter motor fails to turn.
NOTE:
• Before troubleshooting, remove the following part(s):
1. Seat
2. Right side panel
NG →
OK ↓
NG →
OK ↓
OK →
NG ↓
NG →
OK ↓
NG →
OK ↓
NG →
OK ↓
NG →
OK ↓
NG →
OK ↓
1. Check the fuse.
Refer to “CHECKING THE FUSE”
on page 8-61. Replace the fuse.
2. Check the battery.
Refer to “CHECKING AND
CHARGING THE BATTERY ” on
page 8-61. • Clean the battery terminals.
• Recharge or replace the battery.
3. Check the starter motor operation.
Refer to “CHECKING THE START-
ER MOTOR OPERATION ” on page
8-69.
Starter motor is OK. Perform the electric
starting system troubleshooting, starting
with step 5.
4. Check the starter motor.
Refer to “CHECKING THE START-
ER MOTOR” on page 5-35. Repair or replace the starter motor.
5. Check the starting circuit cut-off re-
lay.
Refer to “CHECKING THE RE-
LAYS” on page 8-64.
Replace the starting circuit cut-off relay.
6. Check the diode.
Refer to “CHECKING THE DIODE”
on page 8-66. Replace the diode.
7. Check the starter relay.
Refer to “CHECKING THE RE-
LAYS” on page 8-64. Replace the starter relay.
8. Check the main switch.
Refer to “CHECKING THE
SWITCHES” on page 8-57. Replace the main switch.
NG →
OK ↓
NG →
OK ↓
NG →
OK ↓
NG →
OK ↓
NG →
OK ↓
9. Check the engine stop switch.
Refer to “CHECKING THE
SWITCHES” on page 8-57.
The engine stop switch is faulty. Replace
the right handlebar switch.
10.Check the neutral switch.
Refer to “CHECKING THE
SWITCHES” on page 8-57. Replace the neutral switch.
11.Check the clutch switch.
Refer to “CHECKING THE
SWITCHES” on page 8-57. Replace the clutch switch.
12.Check the start switch.
Refer to “CHECKING THE
SWITCHES” on page 8-57.
The start switch is faulty. Replace the right
handlebar switch.
13.Check the entire starting system
wiring.
Refer to “CIRCUIT DIAGRAM” on
page 8-5. Properly connect or repair the starting sys-
tem wiring.
The starting system circuit is OK.