Ignition System Troubleshooting - Yamaha FZ8NA Service Manual

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. Left inner panel (FZ8SA)
4. Right inner panel (FZ8SA)
5. Left side panel (FZ8SA)
6. Right side panel (FZ8SA)
7. Front cowling (FZ8SA)
8. Fuel tank
9. Radiator
1. Check the fuses.
(Main and ignition)
Refer to "CHECKING THE FUSES"
on page 8-185.
OK↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-186.
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 8-192.
NG↓
5. Check the ignition coils.
Refer to "CHECKING THE IGNI-
TION COILS" on page 8-192.
OK↓
6. Check the crankshaft position sen-
sor.
Refer to "CHECKING THE
CRANKSHAFT POSITION SEN-
SOR" on page 8-193.
OK↓
NG→
Replace the fuse(s).
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
NG→
Re-gap or replace the spark plugs.
OK→
Ignition system is OK.
NG→
Replace the ignition coils.
NG→
Replace the crankshaft position sen-
sor.
8-7
IGNITION SYSTEM