Yamaha MT-01 Service Manual page 749

Manuals by Motomatrix / www.motomatrix.co.uk
EAS27150
TROUBLESHOOTING
The ignition system fails to operate (no spark or intermittent spark).
NOTE:
• Before troubleshooting, remove the following part(s):
1. Seat
2. Fuel tank
3. Air filter case
4. Battery box
5. Engine
1. Check the fuses.
(Main, ignition, and ECU)
Refer to "CHECKING THE FUS-
ES" on page 7-93.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 7-94.
OK ↓
3. Check the spark plugs.
Refer to "CHECKING THE SPARK
PLUGS" on page 3-8.
OK ↓
4. Check the ignition spark gap.
Refer to "CHECKING THE IGNI-
TION SPARK GAP" on page 7-100.
NG ↓
5. Check the spark plug caps.
Refer to "CHECKING THE SPARK
PLUG CAPS" on page 7-99.
OK ↓
6. Check the ignition coils.
Refer to "CHECKING THE IGNI-
TION COILS" on page 7-99.
OK ↓
7. Check the crankshaft position sen-
sor.
Refer to "CHECKING THE CRANK-
SHAFT POSITION SENSOR" on
page 7-101.
OK ↓
Email: info@motomatrix.co.uk
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 spark plug cap(s).
NG →
Replace the ignition coil(s).
NG →
Replace the crankshaft position sensor.
7-3
IGNITION SYSTEM