Troubleshooting - Yamaha VMAX 2009 Service Manual

EAS27140

TROUBLESHOOTING

The ignition system fails to operate (no spark or intermittent spark).
TIP
• Before troubleshooting, remove the following part(s):
1. Top cover
2. Right side cover
1. Check the fuses.
(Main and ignition)
Refer to "CHECKING THE FUS-
ES" on page 8-133.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-134.
OK ↓
3. Check the spark plugs.
Refer to "CHECKING THE SPARK
PLUGS" on page 3-10.
OK ↓
4. Check the ignition spark gap.
Refer to "CHECKING THE IGNI-
TION SPARK GAP" on page 8-140.
NG ↓
5. Check the ignition coils.
Refer to "CHECKING THE IGNI-
TION COILS" on page 8-139.
OK ↓
6. Check the crankshaft position sen-
sor.
Refer to "CHECKING THE CRANK-
SHAFT POSITION SENSOR" on
page 8-140.
OK ↓
7. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-129.
OK ↓
8. Check the engine stop switch.
Refer to "CHECKING THE
SWITCHES" on page 8-129.
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 sen-
sor/stator assembly.
NG →
Replace the main switch/immobilizer unit.
NG →
Replace the right handlebar switch.
8-4
IGNITION SYSTEM