Troubleshooting - Yamaha FZS1000N Service Manual

EAS00737

TROUBLESHOOTING

The ignition system fails to operate (no
spark or intermittent spark).
Check:
1. Main and ignition fuses
2. Battery
3. Spark plugs
4. Ignition spark gap
5. Spark plug cap resistance
6. Ignition coil resistance
7. Main switch
8. Engine stop switch
9. Pickup coil resistance
10. Wiring connections
(of the entire ignition system)
NOTE:
Before troubleshooting, remove the following
part(-s):
1) Seat
2) Fuel tank
3) Side cover
S Troubleshoot with the following special
tool(-s).
Dynamic spark tester
YM-34487
Pocket tester measurement
YU-03112-C
EAS00738
1. Main and ignition fuses
S Check the main and ignition fuses for conti-
nuity.
Refer to "CHECKING THE FUSES" in
CHAPTER 3.
S Are the main and ignition fuses OK?
YES
NO
Replace the fuse(s).
8-14
IGNITION SYSTEM
EAS00739
2. Battery
S Check the condition of the battery.
Refer to "CHECKING THE BATTERY" in
CHAPTER 3.
Minimum open-circuit voltage
12.8 V or more at 20_C (68_F)
S Is the battery OK?
YES
EAS00741
3. Spark plugs
The following procedure applies to all of the
spark plugs.
S Check the condition of the spark plug.
S Check the spark plug type.
S Measure the spark plug gap.
Refer to "CHECKING THE SPARK PLUGS"
in CHAPTER 3.
Standard spark plug
CR9E (NGK)
U27ESR-N (DENSO)
Spark plug gap
0.7 X 0.8 mm (0.028 X 0.031 in)
S Is the spark plug in good condition, it is of the
correct type, and is its gap within specifica-
tion?
YES
ELEC
NO
S Clean the battery
terminals.
S Recharge or replace
the battery.
NO
Re-gap or replace
the spark plug.