Troubleshooting - Yamaha YXR70FX Service Manual

TROUBLESHOOTING

The fuel pump fails to operate.
Check:
1. main, ignition, and fuel injection system
fuses
2. battery
3. main switch
4. fuel injection system relay
5. fuel pump
6. wiring connections
(the entire fuel pump system)
TIP:
_
• Before troubleshooting, remove the following
part(s):
1. rear console
• Troubleshoot with the following special
tool(s).
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
EBS01043
1. Main, ignition, and fuel injection system
fuses
• Check the main, ignition, and fuel injection
system fuses for continuity.
Refer to "CHECKING THE FUSES" in
chapter 3.
• Are the main, ignition, and fuel injection
system fuses OK?
YES
FUEL PUMP SYSTEM
NO
Replace the fuse(s).
9 - 51
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
EBS01041
3. Main switch
• Check the main switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the main switch OK?
YES
– +
ELEC
NO
• Clean the battery
terminals.
• Recharge or
replace the battery.
NO
Replace the main
switch.