how to check fuel pump in Toyota Corolla E170 (2013-2019)

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

576 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 issues in Toyota Corolla E170 (2013-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Fuel System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the fuel system to depressurize before connecting or disconnecting fuel lines.

Symptoms

•Engine cranks but does not start
•Intermittent stalling while driving
•Loss of power during acceleration
•Check engine light illuminated
•Unusual whining noises from the fuel tank

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for fuel system related codes.
2
Inspect the fuel pump fuse and relay for continuity using a multimeter.
3
Measure fuel pressure at the fuel rail using a fuel pressure gauge.
4
Listen for the fuel pump operation by turning the ignition key to the 'ON' position without starting the engine.
5
Check for voltage at the fuel pump connector while the ignition is in the 'ON' position.

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

•OBD-II scanner
•Multimeter
•Fuel pressure gauge
•Basic hand tools (sockets and wrenches)

Parts Required

•Fuel pump (if replacement is necessary)
•Fuel filter (if replacement is necessary)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for fuel system related codes.
2
Inspect the fuel pump fuse and relay for continuity using a multimeter.
3
Measure fuel pressure at the fuel rail using a fuel pressure gauge.
4
Listen for the fuel pump operation by turning the ignition key to the 'ON' position without starting the engine.
5
Check for voltage at the fuel pump connector while the ignition is in the 'ON' position.

Solution

1. Preparation

Tools Required: OBD-II scanner, multimeter, fuel pressure gauge, basic hand tools (sockets and wrenches).
Disconnect the negative terminal of the battery to avoid electrical shock.

2. Inspect Fuel Pump Fuse and Relay

Sub-steps:
- Locate the fuse box under the dashboard and the engine compartment.
- Remove the fuel pump fuse and inspect it for any signs of damage.
- Use a multimeter to check the continuity of the fuse.
- Locate the fuel pump relay, remove it, and perform the same continuity check.

3. Measure Fuel Pressure

Sub-steps:
- Connect the fuel pressure gauge to the fuel rail service port.
- Turn the ignition to the "ON" position without starting the engine and observe the pressure reading.
- Compare the reading with the manufacturer's specifications (typically around 40-50 psi).
- If the pressure is low, it indicates a faulty fuel pump or blocked fuel filter.

4. Check Fuel Pump Voltage

Sub-steps:
- Reconnect the electrical connector to the fuel pump.
- Use a multimeter to measure voltage at the fuel pump connector while the ignition is in the "ON" position.
- Verify that the voltage reading is within the acceptable range (usually around 12 volts).
- If no voltage is present, trace back to the fuel pump relay and fuse.

5. Test Fuel Pump Operation

Sub-steps:
- If all checks are satisfactory and the pump is suspected to be faulty, access the fuel pump by removing the rear seat or accessing the fuel tank.
- Connect a 12V power supply directly to the fuel pump terminals to check if it operates.
- If the pump runs, the issue may lie in the wiring or relay; if it does not, the fuel pump likely needs replacement.