How to fix fuel pump failure Toyota Corolla

Toyota Corolla E170 (2013-2019)

Error Codes

3-4 hours

Time

medium

Difficulty

high

Severity

3 min read

594 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix fuel pump failure in a Toyota Corolla E170 (2013-2019) with detailed steps and required tools.

Affected Component

fuel pump

Estimated Time

3-4 hours

Symptoms

•Engine sputtering at high speeds
•Loss of power under stress
•Engine not starting or hard to start
•Sudden engine stalls
•No sound from fuel pump when ignition is turned on

Diagnostic Steps

1
Check for fuel pump noise
2
Inspect fuel pump relay and fuse
3
Fuel pressure test
4
Check for electrical issues

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Multimeter
•Fuse puller
•Fuel pressure gauge
•Socket set
•Screwdriver
•Pliers
•Safety goggles
•Gloves

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Solution

Fixing Fuel Pump Failure on a Toyota Corolla E170 (2013-2019)

Symptoms of Fuel Pump Failure:

Engine sputtering at high speeds
Loss of power under stress (e.g., driving uphill, accelerating)
Engine not starting or hard to start
Sudden engine stalls
No sound from fuel pump when ignition is turned on

Diagnostic Steps:

Check for Fuel Pump Noise:
- Tools Needed: None
- Procedure:
  - Turn the ignition key to the "ON" position without starting the engine.
  - Listen for a humming noise from the rear of the vehicle, which indicates that the fuel pump is operational.
Inspect Fuel Pump Relay and Fuse:
- Tools Needed: Multimeter, Fuse puller
- Procedure:
  - Locate the fuel pump fuse and relay in the engine compartment fuse box.
  - Check the fuse for continuity using a multimeter.
  - Swap the fuel pump relay with a similar one to check for relay issues.
Fuel Pressure Test:
- Tools Needed: Fuel pressure gauge
- Procedure:
  - Locate the fuel rail and attach the fuel pressure gauge to the Schrader valve.
  - Turn the ignition on and check if the fuel pressure matches the specifications in the vehicle's manual (typically around 50-55 psi).
  - A low or no reading indicates a faulty pump or blockage.
Check for Electrical Issues:
- Tools Needed: Multimeter
- Procedure:
  - Access the fuel pump connector under the rear seat or trunk.
  - Use a multimeter to check for voltage at the connector when the ignition is turned on.
  - No voltage indicates an electrical issue upstream.

Repair Instructions:

Prepare for Fuel Pump Replacement:
- Tools Needed: Socket set, Screwdriver, Pliers, Safety goggles, Gloves
- Procedure:
  - Disconnect the battery to prevent electrical shocks.
  - Relieve the fuel system pressure by removing the fuel cap and disconnecting the fuel pump relay while the engine is running until it stalls.
Access the Fuel Pump:
- Procedure:
  - Fold down the rear seats and remove the trunk liner or rear seat cushion to access the fuel pump cover.
  - Remove the screws securing the fuel pump access cover.
Remove the Fuel Pump Assembly:
- Procedure:
  - Disconnect the electrical connector and fuel lines from the pump assembly. Use pliers to remove hose clamps if necessary.
  - Unscrew the retaining ring or bolts securing the pump assembly in the tank.
  - Carefully lift the pump assembly out of the fuel tank, taking care not to damage the float arm or sending unit.
Install New Fuel Pump Assembly:
- Procedure:
  - Compare the new pump assembly with the old one to ensure compatibility.
  - Install the new fuel pump into the tank, ensuring the float arm is correctly positioned.
  - Secure the pump with the retaining ring or bolts.
  - Reconnect the fuel lines and electrical connector.
Reassemble and Test:
- Procedure:
  - Reinstall the fuel pump access cover and trunk liner or rear seat cushion.
  - Reconnect the battery terminal.
  - Turn the ignition key to the "ON" position to prime the fuel system. Check for leaks around the fuel pump assembly.
  - Start the engine to verify successful installation.

Tips:

Always work in a well-ventilated area and avoid open flames or sparks.
Dispose of old fuel and components responsibly according to local regulations.
Consider replacing the fuel filter if it hasn't been done recently to ensure optimal performance.

By following these steps, you can effectively diagnose and replace a faulty fuel pump in a Toyota Corolla E170.