Yamaha FZR400 Fuel Pump Circuit Diagram (1989). The fuel pump circuit consists of the fuel pump relay, fuel pump, “ENGINE STOP” switch and digital ignition unit. The digital ignition unit includes the control unit for the fuel pump. The fuel pump starts and stops as indicated in the chart below. The following schematic illustrates the Yamaha FZR400 Fuel Pump Circuit Diagram.

Yamaha FZR400 Fuel Pump Circuit Diagram

1. To main fuse and battery
2. Main switch
3. “ENGINE STOP” switch
4. Digital igniter unit
5. Fuel pump relay
6. Fuel pump

FUEL PUMP TEST

The diaphragm is pulled in by the plunger allowing fuel to be sucked into the fuel chamber. Fuel is pushed out from the pump until carburetor float chamber is filled with fuel, and then the cut-off switch cuts off the circuit. When the spring pushes the diaphragm further to the end, the cut-off switch turns on and the solenoid coil pulls the plunger with the diaphragm forcing fuel into the fuel chamber.



Related Post

BMW R80GS R100R Wiring Diagram and Electrical System
Honda VTR1000 Ignition System Circuit and Wiring Diagram (2000)
2005 Honda Goldwing GL1800 Cooling Fan Schematic Diagram
Honda CB750 SOHC Engine Diagram
Triumph Daytona 675 Lighting Circuit and Wiring Diagram