The Toyota Tercel fuel pump electronic components consists of: battery, IG switch, EFI main relay, circuit opening relay, fuel pump, ECM, starter relay and starter. The diagram below shows the the Toyota Tercel Fuel Pump Control Circuit.

Toyota Tercel Fuel Pump Control Circuit

When the engine is cranked, current flows from terminal ST of the ignition switch to the starter relay coil and also current flows to terminal STA of ECM (STA signal). When the STA signal and NE signal are input to the TCM, Tr is turned ON, current flows to coil of the circuit opening relay, the relay switches ON, power is supplied to the fuel pump and the fuel pump operates. While the NE signals is generated (engine running), the ECM keeps Tr ON (circuit opening relay ON) and the fuel pump also keeps operating.



Related Post

Chevrolet Lumina Engine Control Module Electrical Diagram (92)
Volvo S80 Wiring Diagram and Electrical Schematic (2001)
1993 Honda Prelude Wiring Diagram Electrical System Schematics
2008 Mercury Sable Passenger Compartment Fuse Panel and Relay Code
2001 Dodge Dakota Headlight System Wiring Diagram