Check:
- 1. main, and ignition fuses
- 2. battery
- 3. main switch
- 4. engine stop switch
- 5. starting circuit cutoff relay (fuel pump relay)
- 6. fuel pump
- 7. wiring (of the entire charging system)
Note: Before troubleshooting, remove the following part (-s):
- 1) battery cover
- 2) rider's seat
- 3) fuel tank
- 4) tool box cover
- 5) left side cover
- Troubleshoot with the following special tool (-s).
- Pocket tester: 90890-03112
1. Main, and ignition fuses
Check the main, and ignition fuses for continuity. Refer to "Checking the fuses".
Are the main, and ignition fuses OK?
NO: Replace the fuse(-s).
YES:
2. Battery
Check the condition of the battery. Refer to "Checking and charging the battery".
Open-circuit voltage: 12.8 V or more at 20°C
Is the battery OK?
NO: Clean the battery terminals. Recharge or replace the battery.
YES:
3. Main switch
Check the main switch for continuity. Refer to "Checking the switches".
Is the main switch OK?
NO: Replace the main switch.
YES:
4. Engine stop switch
Check the engine stop switch for continuity. Refer to "Checking the switches".
Is the engine stop switch OK?
NO: Replace the right handlebar switch.
YES:
5. Starting circuit cutoff relay (fuel pump relay)
Remove the relay unit from the wire harness.
Connect the pocket tester (Ω x 1) and battery (12 V) to the relay unit terminals.
- Battery (+) terminal → Red/Black terminal (1)
- Battery (-) terminal → Blue/Red terminal (2)
- Tester (+) lead → Red/Black terminal (1)
- Tester (-) lead → Blue/Black terminal (3)
![](https://motoinstruction.ru/img/yamaha/16/122641.jpg)
Does the fuel pump relay have continuity between red/black and blue/black?
NO: Replace the starting circuit cutoff relay.
YES:
6. Fuel pump resistance
Disconnect the fuel pump coupler from the wire harness.
Connect the pocket tester (Ω x 1) to the fuel pump coupler terminals.
- Tester (+) lead → Blue/Black terminal (1)
- Tester (-) lead → Black terminal (2)
![](https://motoinstruction.ru/img/yamaha/16/122642.jpg)
Measure the fuel pump resistance.
- Fuel pump resistance: 1.6-2.2 Ω at 20°C (68°F)
Is the fuel pump OK?
NO: Replace the fuel pump.
YES:
7. Wiring
Check the entire fuel pump system's wiring. Refer to "Circuit diagram".
Is the fuel pump system's wiring properly connected and without defects?
NO: Properly connect or repair the fuel pump system's wiring.
YES: Replace the ignitor unit.