Yamaha YZF-R1 1998, Service Manual

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ELEC
ELECTRIC STARTING SYSTEM
EB803020
TROUBLESHOOTING
Check:
1. main and ignition fuses
2. battery
3. starter motor
4. starting circuit cutoff relay
5. relay unit
6. starter relay
7. main switch
8. engine stop switch
9. neutral switch
10. sidestand switch
11. clutch switch
12. start switch
13. wiring
(of the entire starting system)
NOTE:
• Before troubleshooting, remove the
following part(-s):
1) rider seat
2) fuel tank
3) air filter case
4) front cowling inner panel (left)
5) windshield
• Troubleshoot with the following spe-
cial tool(-s).
The starter motor fails to turn.
Pocket tester
90890-03112
EB802400
YES
NO
1.Main and ignition fuses
• Check the main and ignition fuses for
continuity.
Refer to “CHECKING THE FUSES” in
chapter 3.
• Are the main and ignition fuses OK?
Replace the fuse(-s).
EB802401
YES
NO
2.Battery
• Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.
Open-circuit voltage
12.8 V or more at 20 ˚C
• Is the battery OK?
• Clean the battery
terminals.
• Recharge or
replace the battery.
EB803400
YES
NO
3.Starter motor
• Connect the battery positive terminal 1
and starter motor lead 2 with a jumper
lead 3 .
• Does the starter motor turn?
Repair or replace
the starter motor.
WARNING
WARNING
• A wire that is used as a jumper lead
must have at least the same capacity of
the battery lead, otherwise the jumper
lead may burn.
• This check is likely to produce sparks,
therefore make sure that no flammable
gas or fluid is in the vicinity.