Yamaha YZF-R1P 2001-2003, Service Manual

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ELEC
CHARGING SYSTEM
EAS00774
TROUBLESHOOTING
Check:
1. main fuse
2. battery
3. charging voltage
4. stator coil resistance
5. wiring connections
(of the entire charging system)
NOTE:
_
• Before troubleshooting, remove the following
part(s):
1. seat
2. fuel tank
3. bottom cowling
• Troubleshoot with the following special
tool(s).
EAS00738
EAS00739
EAS00775
The battery is not being charged.
Pocket tester
YM-03112
1. Main fuse
• Check the main fuse for continuity.
Refer to “CHECKING THE FUSES” in
chapter 3.
• Are the main fuse OK?
YES NO
Replace the fuse.
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
NO
• Clean the battery
terminals.
• Recharge or
replace the bat-
tery.
3. Charging voltage
• Set the engine tachometer to the ignition
coil of cylinder #1.
• Connect the pocket tester (DC 20 V) to the
battery as shown.
Positive tester probe
→
positive battery terminal
Negative tester probe
→
negative battery terminal
• Start the engine and let it run at approxi-
mately 5,000 r/min.
• Measure the charging voltage.
Charging voltage
14 V at 5,000 r/min
NOTE:
_
Make sure the battery is fully charged.
• Is the charging voltage within specifica-
tion?
NO
YES
The charging circuit
is OK.