Yamaha FJR13AG Service Manual page 483

EAS30492
TROUBLESHOOTING
The ignition system fails to operate (no spark or intermittent spark).
TIP
• Before troubleshooting, remove the following part(s):
1. Side cowlings
2. Front cowling assembly
3. Fuel tank
4. T–bar
5. Storage compartment
6. Side covers
7. Air filter case
1. Check the fuses.
(Main, ignition, and fuel injection
system)
Refer to "CHECKING THE FUS-
ES" on page 8-250.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-251.
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 SPARK GAP" on page 8-258.
NG ↓
5. Check the ignition coils.
Refer to "CHECKING THE IGNI-
TION COILS" on page 8-257.
OK ↓
6. Check the crankshaft position sen-
sor.
Refer to "CHECKING THE CRANK-
SHAFT POSITION SENSOR" on
page 8-258.
OK ↓
7. Check the cylinder identification
sensor.
OK ↓
NG →
Replace the fuse(s).
NG →
• Clean the battery terminals.
• Recharge or replace the battery.
NG →
Re-gap or replace the spark plug(s).
OK →
Ignition system is OK.
NG →
Replace the ignition coil(s).
NG →
Replace the crankshaft position sensor.
NG →
Replace the cylinder identification sensor.
8-6
IGNITION SYSTEM