Troubleshooting - Yamaha XVZ13TF 1999 Service Manual

EAS00816

TROUBLESHOOTING

If the fuel pump fails to operate:
Check:
1. Main and ignition fuses
2. Battery
3. Main switch
4. Engine stop switch
5. Starting circuit cut-off relay
(the fuel pump relay)
6. Fuel pump
7. Wiring connections
(the entire fuel system)
NOTE:
S Before troubleshooting, remove the following
part(-s):
1) Rider seat
2) Side cover (left)
3) Fuel tank
Troubleshoot with the following special tool(-s).
Pocket tester
YU-03112, 90890-03112
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
EAS00739
2. Battery
S Check the condition of the battery.
Refer to "CHECKING THE BATTERY" in
CHAPTER 3.
Open-circuit voltage
12.8 V or more at 20_C
S Is the battery OK?
YES
FUEL PUMP SYSTEM
NO
Replace the fuse (-s).
NO
S Clean the battery
terminals.
S Recharge
or re-
place the battery.
EAS00749
3. Main switch
S Check the main switch for continuity.
Refer to "CHECKING THE SWITCHES".
S Is the main switch OK?
YES
EAS00750
4. Engine stop switch
S Check the engine stop switch for continuity.
Refer to "CHECKING THE SWITCHES".
S Is the engine stop switch OK?
YES
EAS00759
5. Starting circuit cut-off relay
S Disconnect the starting circuit cut-off relay
coupler from the wire harness.
S Connect the pocket tester (Ω
tery (12 V) to the starting circuit cut-off relay
coupler as shown.
Battery positive terminal ! red/black
Battery negative terminal ! blue/red
Tester positive probe ! red/black
Tester negative probe ! blue/black
S Does the starting circuit cut-off relay have con-
tinuity between red/black and blue/black?
YES
8-45
ELEC
NO
Replace the main
switch.
NO
Replace the right
handlebar switch.
1) and bat-
1
2
3
4
NO
Replace the starting
circuit cut-off relay.