Toyota 23221-0A030 Fuel Pump

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To check fuel pressure, remove the fuel line after relieving system pressure, turn on the ignition, and check the gauge. If pressure isn't within specifications, check the fuel pressure regulator or other causes. You can inspect the EFI fuse and wiring to the pump.

To remove the fuel pump/Fuel Level Sensor from a vehicle, first, relieve the fuel system pressure and disconnect the cable from the negative terminal of the battery. Then, remove the rear seat from inside the passenger compartment and the fuel pump/sending unit floor service hole cover. Disconnect the electrical connector and fuel line, and remove the retaining bolts before carefully withdrawing the assembly from the fuel tank. Disconnect the electrical connector from the fuel pump and remove the pump from the assembly, either by sliding the hose clamp up the hose or by removing the fuel-sending unit and fuel filler and prying up the housing snap-retainers in sequence. Finally, remove the clip securing the inlet strainer to the pump and inspect it for contamination before replacing it if necessary. To install the fuel pump/sending unit assembly, reassemble it in the reverse order of disassembly and connect the fuel line and electrical connector before completing the remainder of the installation in reverse.

Possible causes include a clogged fuel filter, restricted fuel line, leaking fuel injectors, or defective fuel pressure regulator or fuel pump.

To remove the plastic support on the bottom of the pump, you can release the clips with a screwdriver.

Replace it.

If there is no response from the fuel pump, you should check the fuel pump's electrical circuit.

After testing, you should relieve the fuel pressure and remove the fuel pressure gauge.

Remove the plastic support on the bottom of the pump by releasing the clips with a screwdriver, then pull off the rubber isolator, the fuel sock filter clip, and the electrical connector.