Ignition System Troubleshooting - Yamaha R1 Series 2015 Service Manual

EAS30492
TROUBLESHOOTING
The ignition system fails to operate (no spark or intermittent spark).
TIP
• Before troubleshooting, remove the following part(s):
1. Front side cowling/Front panel
2. Rider seat
3. Fuel tank cover
4. Fuel tank
5. Air filter case
1. Check the fuses.
(Main, ignition and backup)
Refer to "CHECKING THE FUSES"
on page 8-180.
OK
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-181.
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 SPARK
PLUGS" on page 3-4.
NG
5. Check the ignition coils.
Refer to "CHECKING THE IGNI-
TION COILS" on page 8-186.
OK
6. Check the crankshaft position sen-
sor.
Refer to "CHECKING THE CRANK-
SHAFT POSITION SENSOR" on
page 8-187.
OK
7. Check the cylinder identification
sensor.
Refer to "CHECKING THE CYLIN-
DER IDENTIFICATION SENSOR"
on page 8-193.
OK
8. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-177.
OK
Replace the fuse(s).
NG
• Clean the battery terminals.
• Recharge or replace the battery.
NG
Re-gap or replace the spark plug(s).
NG
Ignition system is OK.
OK
Replace the ignition coil(s).
NG
Replace the crankshaft position sensor.
NG
Replace the cylinder identification sensor.
NG
Replace the main switch/immobilizer unit.
NG
8-6
IGNITION SYSTEM