Fuel pump

Good evening.

The pump will only run for two seconds with the key on. When you crank the engine it will turn on full time.

Have you checked the voltage cranking?

The EFI relay sends power to the load side of the fuel pump relay. The control side goes from the ignition switch to the starter relay and then through the park/neutral switch then to the control side of the fuel pump relay.

You will need to test for voltage for the control side while cranking.

Roy

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

The fuel pump relay is also called circuit opening relay.

The Circuit Opening Relay is located at the right kick panel directly above the Engine Control Module (ECM).

The EFI Main Relay is located in the under hood fuse/relay box mounted at the right fender-well.

Toyota has a handy spot to test for power for the pump and it lets you apply power to test the pump. The Data Link Connector under the hood attached to the relay box. Pin number 1 is the fuel pump feed, if you put a meter or test light there and it lights up when the key is turned on the EFI main relay and the circuit opening relay (fuel pump relay) are both working. If the pump is not operating then you can test for power at the actual pump connector.
Or you can test the pumps operation by jumpering battery voltage to that same pin (1) and seeing if the pump operates.
If the pump turns on with the jumper but not with the key and you don't have power at the pin with the key "on" check at pin 12 for battery power. It gets its power from the EFI main relay, if it has power the circuit opening relay is suspect.
The attached pictures are the DLC, The v6 and the four cylinder engine control wiring.