Van Wagon 2WD L4-2237cc 2.2L (4Y-E) (1989)
Circuit Opening Relay: Description and Operation
Circuit Opening Relay Schematic
The Circuit Opening Relay, located under the dash panel, is responsible for providing power to the Fuel Pump. Power is applied to the STA terminal of
the relay from the starter when the ignition switch signals cranking mode. This allows the fuel pump to operate until the engine starts and runs under its
own power. A signal from the Air Flow Meter (FC), keeps the relay closed until the ignition switch is turned OFF and de-energizes the EFI Main Relay.
The fuel pump operation is then interrupted.