Yamaha TMAX 2020 Service Manual

8-49FUEL PUMP SYSTEMEAS30514TROUBLESHOOTINGIf the fuel pump fails to operate.TIP• Before troubleshooting, remove the following part(s):1. Front cowling assembly2. Storage box3. Fuel tank1. 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 ANDCHARGING THE BATTERY” onpage 8-94.NG • Clean the battery terminals.• Recharge or replace the battery.OK3. Check the engine stop switch.Refer to “CHECKING THESWITCHES” on page 8-91.NG The engine stop switch is faulty. Replacethe 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 FUELPRESSURE” 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” onpage 8-45.NG Properly connect or replace the wire har-ness.OKReplace the ECU and/or remote con-trol unit.