Yamaha YZFR1Y(C) 2009 Service Manual page 392

EAS27150
TROUBLESHOOTING
The ignition system fails to operate (no spark or intermittent spark).
TIP
• Before troubleshooting, remove the following part(s):
1. Rider seat
2. Passenger seat
3. Air filter case duct
4. Side cowlings
1. Check the fuses.
(Main, ignition and fuel injection
system)
Refer to "CHECKING THE FUSES"
on page 8-109.
OK↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-109.
OK↓
3. Check the spark plugs.
Refer to "CHECKING THE SPARK
PLUGS" on page 3-4.
OK↓
4. Check the ignition spark gap.
Refer to "CHECKING THE IGNI-
TION COILS" on page 8-116.
OK↓
5. Check the ignition coils.
Refer to "CHECKING THE IGNI-
TION COILS" on page 8-116.
OK↓
6. Check the crankshaft position sen-
sor.
Refer to "CHECKING THE
CRANKSHAFT POSITION SEN-
SOR" on page 8-117.
OK↓
NG→
Replace the fuse(s).
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
NG→
Re-gap or replace the spark plugs.
NG→
Ignition system is OK.
NG→
Replace the ignition coils.
NG→
Replace the crankshaft position sen-
sor.
8-5
IGNITION SYSTEM