Yamaha TMAX 2020, Service Manual

Page: 404 / 688

8-49
FUEL PUMP SYSTEM
EAS30514
TROUBLESHOOTING
If the fuel pump fails to operate.
TIP
• Before troubleshooting, remove the following part(s):
1. Front cowling assembly
2. Storage box
3. Fuel tank
1. Check the fuses.
(Main, ignition, backup and fuel in-
jection system)
Refer to “CHECKING THE FUS-
ES” on page 8-93.
NG

Replace the fuse(s).
OK

2. Check the battery.
Refer to “CHECKING AND
CHARGING THE BATTERY” on
page 8-94.
NG

• Clean the battery terminals.
• Recharge or replace the battery.
OK

3. Check the engine stop switch.
Refer to “CHECKING THE
SWITCHES” on page 8-91. NG

The engine stop switch is faulty. Replace
the handlebar switch (right).
OK

4. Check the ignition system relay.
Refer to “CHECKING THE RE-
LAYS” on page 8-94. NG

Replace the ignition system relay.
OK

5. Check the fuel injection system re-
lay.
Refer to “CHECKING THE RE-
LAYS” on page 8-94.
NG

Replace the fuel injection system relay.
OK

6. Check the fuel pump.
Refer to “CHECKING THE FUEL
PRESSURE” on page 7-12. NG

Replace the fuel pump assembly.
OK

7. Check the entire fuel pump sys-
tem’s wiring.
Refer to “CIRCUIT DIAGRAM” on
page 8-45.
NG

Properly connect or replace the wire har-
ness.
OK

Replace the ECU and/or remote con-
trol unit.