why is my Toyota Highlander Third Generation (2014-2019) not getting power to the fuel pump

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

608 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 power issues in Toyota Highlander 2014-2019. Step-by-step guide with diagnostic procedures 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 systems.
•Allow the engine to cool before opening the fuel system to prevent burns.

Symptoms

•Check engine light illuminated
•Engine cranks but does not start
•No sound from fuel pump when the ignition is turned on
•Fuel gauge may indicate empty despite having fuel
•Potential fuel odor if there is a leak

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related trouble codes.
2
Check the fuel pump relay by inspecting and testing for continuity.
3
Inspect the fuel pump fuse for any signs of damage or blown fuse.
4
Use a multimeter to test for voltage at the fuel pump connector while the ignition is in the ON position.
5
Inspect wiring and connectors from the fuel pump to ensure there are no breaks or corrosion.
6
Check the fuel pump control module (if equipped) for proper operation.

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
•Socket set
•Fuel pressure gauge
•Screwdrivers

Parts Required

•Fuel pump relay
•Fuel pump fuse
•Fuel pump (if necessary)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related trouble codes.
2
Check the fuel pump relay by inspecting and testing for continuity.
3
Inspect the fuel pump fuse for any signs of damage or blown fuse.
4
Use a multimeter to test for voltage at the fuel pump connector while the ignition is in the ON position.
5
Inspect wiring and connectors from the fuel pump to ensure there are no breaks or corrosion.
6
Check the fuel pump control module (if equipped) for proper operation.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Fuel Pump Relay

Locate the fuel pump relay in the fuse box (consult the owner's manual for exact location).
Remove the relay from the socket.
Test the relay with a multimeter for continuity; replace if faulty.
Reinstall the new relay, ensuring it seats properly.

3. Check and Replace Fuel Pump Fuse

Locate the fuse box and identify the fuse for the fuel pump (refer to the owner's manual).
Remove the fuel pump fuse and inspect it visually; replace if blown.
Reinstall the new fuse securely in the fuse box.

4. Test Fuel Pump Voltage

Reconnect the battery.
Turn the ignition to the ON position without starting the engine.
Use a multimeter to measure voltage at the fuel pump connector; it should read around 12V.
If no voltage is detected, trace back to the fuel pump relay and wiring for issues.

5. Replace Fuel Pump (if necessary)

If there is power at the connector but the pump does not operate, replace the fuel pump.
Drain the fuel tank if necessary and disconnect the lines.
Remove the fuel pump assembly from the tank, following safety procedures.
Install the new fuel pump into the assembly, ensuring all connections are secure.
Reinstall the assembly into the tank and reconnect the fuel lines.