Replacing Fuel Pump In Toyota Celica: Step-By-Step Guide

If you're looking to replace the fuel pump on your 2000 Toyota Celica, there are a few things you'll need to do. Firstly, you'll need to check the fuel pump operation and pressure, which can be done by connecting a TOYOTA hand-held tester to the DLC3 and performing an active test. You can also check the fuel pressure by connecting a fuel pressure gauge to the Schrader valve near the fuel rail. If you find that the fuel pump needs to be replaced, the process involves removing the rear seat cushion, floor service hole cover, and fuel pump & sender gauge connector. You will also need to inspect the fuel pump resistance and operation before reconnecting the fuel pump & sender gauge connector and reinstalling the floor service hole cover and rear seat cushion.

Check fuel pump operation

To check the fuel pump operation of a 2000 Toyota Celica, follow these steps:

Firstly, connect the TOYOTA hand-held tester to the DLC3. Turn the ignition switch on, but do not start the engine. Ensure the TOYOTA hand-held tester main switch is also turned on. If you do not have a TOYOTA hand-held tester, connect the positive (+) lead from the battery to terminal 4 of the connector and the negative (-) lead to terminal 5.

Next, select the active test mode on the TOYOTA hand-held tester. Refer to the TOYOTA hand-held tester operator's manual for further details.

Now, check for pressure in the fuel inlet pipe from the fuel line. If there is fuel pressure, you will hear the sound of fuel following. If there is no pressure, check the following parts: Fusible link, Fuses, EFI Main relay, Fuel pump, ECM, and Witting connector.

Turn the ignition switch to LOCK and disconnect the TOYOTA hand-held tester from the DLC3.

To check the fuel pressure, first, ensure the battery positive voltage is above 12 V. Then, disconnect the negative (-) terminal cable from the battery. Purchase a new fuel tube and take out the fuel tube connector from its pipe. Remove the fuel pipe clamp and disconnect the fuel tube from the fuel pipe. Be cautious and observe the precautions as there is retained pressure in the fuel pipe line.

Install the pressure gauge (SST) as shown in the illustration, using the SST and fuel tube connector. Wipe off any splattered gasoline. Reconnect the negative (-) terminal cable to the battery.

Now, reconnect the TOYOTA hand-held tester to the DLC3. If you do not have a TOYOTA hand-held tester, connect the positive (+) lead from the battery to terminal 4 of the connector and the negative (-) lead to terminal 5. Measure the fuel pressure, which should be between 301-347 kPa (3.1-3.5 kgf/cm2, 44-50 psi). If the pressure is high, replace the fuel pressure regulator. If it is low, check the Fuel hoses and connections, Fuel pump, Fuel filter, and Fuel pressure regulator.

Disconnect the TOYOTA hand-held tester from the DLC3 and start the engine. Measure the fuel pressure at idle, which should again be between 301-347 kPa (3.1-3.5 kgf/cm2, 44-50 psi). Stop the engine and check that the fuel pressure remains as specified for 5 minutes after the engine has stopped. The pressure should be 147 kPa (1.5 kgf/cm2, 21 psi) or more. If it is not, check the fuel pump, pressure regulator and/or injectors.

Finally, after checking the fuel pressure, disconnect the negative (-) terminal cable from the battery and carefully remove the pressure gauge (SST) and fuel tube connector to prevent gasoline from splashing. Reconnect the fuel tube and fuel pipe clamp. Reconnect the negative (-) terminal cable to the battery and check for fuel leakage.

Check fuel pressure

To check the fuel pressure in your 2000 Toyota Celica, you will need to connect a fuel pressure gauge to the Schrader valve located near the fuel rail. You can then start the engine and read the fuel pressure on the gauge. The fuel pressure should be between 35-45 psi when the vehicle is idling.

• Check that the battery positive voltage is above 12 volts.
• Disconnect the negative (-) terminal cable from the battery.
• Purchase a new fuel tube and take out the fuel tube connector from its pipe.
• Remove the fuel pipe clamp.
• Disconnect the fuel tube (fuel tube connector) from the fuel pipe. Be careful as there is retained pressure in the fuel pipe line.
• Install a pressure gauge (SST) using the fuel tube connector and the provided illustration.
• Wipe off any splattered gasoline.
• Reconnect the negative (-) terminal cable to the battery.
• Connect a TOYOTA hand-held tester to the DLC3. Alternatively, connect the positive (+) lead from the battery to terminal 4 of the connector and the negative (-) lead to terminal 5.
• Measure the fuel pressure. It should be between 301-347 kPa (3.1-3.5 kgf/cm2, 44-50 psi).
• If the pressure is high, replace the fuel pressure regulator. If it is low, check the fuel hoses and connections, fuel pump, fuel filter, and fuel pressure regulator.
• Disconnect the TOYOTA hand-held tester from the DLC3.
• Start the engine.
• Measure the fuel pressure at idle. It should be within the same range as in step 10.
• Stop the engine.
• Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped. It should be 147 kPa (1.5 kgf/cm2, 21 psi) or more. If it is not, check the fuel pump, pressure regulator, and/or injectors.
• After checking the fuel pressure, disconnect the negative (-) terminal cable from the battery and carefully remove the pressure gauge (SST) and fuel tube connector to prevent gasoline from splashing.
• Reconnect the fuel tube (fuel tube connector) and install the fuel pipe clamp.
• Reconnect the negative (-) terminal cable to the battery.
• Check for fuel leakage.

Remove rear seat cushion

To remove the rear seat cushion of a 2000 Toyota Celica, follow these steps:

Begin by opening the rear doors of your Celica. You'll notice a small cutout or indentation on the rear side of the seat bottom cushion, close to where the seat meets the backrest. This cutout is located near the center of the seat, and it provides access to remove the cushion.

Reach into this cutout with your hand and feel for a lever or a metal rod. This lever is connected to the seat latch mechanism and is used to release the seat cushion. Once you've located this lever, pull it towards the rear of the car. You might need to wiggle the seat or use a flat-head screwdriver for leverage if it's stuck.

With the lever pulled, lift the rear edge of the seat cushion slightly and slide it towards the backrest. The seat cushion is now disengaged from the front hooks or latches that hold it in place. Be careful not to scratch the plastic trim or tear any fabric during this process.

Now, carefully lift and remove the rear seat cushion. There may be a small amount of wiring connected to the seat, likely for the seat belt warning lamp, so make sure to disconnect this carefully before completely removing the cushion. With the cushion removed, you'll have access to the fuel pump service cover, which is located in the rear passenger floorboard area.

If you need to reinstall the rear seat cushion, simply align the hooks or latches at the front of the seat bottom frame with the corresponding holes in the vehicle floorboard, and then lower the rear of the cushion into place, engaging the latch you released earlier. Make sure the cushion is secure and properly latched before allowing anyone to sit on it.

Remove floor service hole cover

Begin by locating the floor service hole cover. It is typically found in the trunk or rear cargo area of the vehicle, often under a carpet or mat. Once you have located the cover, proceed to clear the area of any obstacles or items that may interfere with your work.

Before starting, ensure you have the necessary tools, including a socket wrench or a screwdriver that fits the screws holding the cover in place. Now, identify the retention method of the floor service hole cover. It could be held in place by screws, bolts, or clips. If it is screwed in place, use your socket wrench to carefully remove the screws. Place them in a small container or bowl to avoid misplacing them. If clips are used, carefully pry or pop the cover off using a flat-head screwdriver or a similar tool. Be gentle to avoid damaging the clips or the surrounding trim.

After removing the screws or clips, carefully lift and remove the floor service hole cover. Set it aside in a safe place, ensuring that you don't lose any of the screws or clips. Depending on your vehicle's configuration, there may be additional steps required to access the fuel pump. Refer to your vehicle's repair manual for specific instructions on proceeding with the fuel pump replacement.

It is important to note that working on a fuel system can be dangerous due to the flammable nature of gasoline. Ensure that you take the necessary precautions, work in a well-ventilated area, and avoid any open flames or sparks. Always refer to your vehicle's repair manual for detailed instructions specific to your car's make, model, and year.

Disconnect fuel pump and sender gauge connector

To disconnect the fuel pump and sender gauge connector on a 2000 Toyota Celica, first remove the rear seat cushion. Then, remove the floor service hole cover. You should then be able to access the fuel pump and sender gauge connector and disconnect it.

It is important to note that this procedure requires working within the fuel system, which can be dangerous if not done properly. Always refer to the owner's manual and take the necessary precautions when working with the fuel system to avoid injury or damage to the vehicle.

Once the fuel pump and sender gauge connector is disconnected, you can proceed to inspect the fuel pump resistance and operation, as outlined in the subsequent steps of the fuel pump replacement procedure for the 2000 Toyota Celica.

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