Troubleshooting - Yamaha YZF-R1P Service Manual

EAS00774

TROUBLESHOOTING

The battery is not being charged.
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).
Pocket tester
YM-03112
EAS00738
1. Main fuse
• Check the main fuse for continuity.
Refer to "CHECKING THE FUSES" in
chapter 3.
• Are the main fuse OK?
YES
EAS00739
2. Battery
• Check the condition of the battery.
Refer to "CHECKING AND CHARGING
THE BATTERY" in chapter 3.
CHARGING SYSTEM
NO
Replace the fuse.
8 - 23
Minimum open-circuit voltage
12.8 V or more at 20 °C (68 °F)
• Is the battery OK?
YES
EAS00775
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
– +
ELEC
NO
• Clean the battery
terminals.
• Recharge or
replace the bat-
tery.
YES
The charging circuit
is OK.