Troubleshooting - Yamaha YFM7FGPW Service Manual

EBS01045

TROUBLESHOOTING

The ignition system fails to operate (no
spark or intermittent spark).
Check:
1. main and ignition fuses
2. battery
3. spark plug
4. ignition spark gap
5. spark plug cap resistance
6. ignition coil resistance
7. main switch
8. engine stop switch
9. crankshaft position sensor resistance
10.lean angle sensor
11.wiring connections (of the entire ignition
system)
NOTE:
_
• Before troubleshooting, remove the following
part(s):
1. seat
2. battery cover
3. right side panel
4. V-belt cooling duct 2
• Troubleshoot with the following special
tool(s).
Ignition checker
90890-06754
Opama pet-4000 spark checker
YM-34487
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
IGNITION SYSTEM
EBS01043
1. Main and ignition fuses
• Check the main and ignition fuses for con-
tinuity.
Refer to "CHECKING THE FUSES" in
chapter 3.
• Are the main and ignition fuses OK?
YES
EBS01044
2. Battery
• Check the condition of the battery.
Refer to "CHECKING AND CHARGING
THE BATTERY" in chapter 3.
Minimum open-circuit voltage
12.8 V or more at 20 °C (68 °F)
• Is the battery OK?
YES
9 - 11
– +
ELEC
NO
Replace the fuse(s).
NO
• Clean the battery
terminals.
• Recharge or re-
place the battery.