my Toyota Highlander Third Generation (2014-2019) has no power to the fuel pump, what could be wrong

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the negative battery terminal to prevent electrical shock.
• Ensure the vehicle is on a flat surface and secure it with wheel chocks.

2. Check and Replace the Fuel Pump Fuse

• Locate the fuse box and identify the fuel pump fuse according to the owner's manual.
• Remove the fuse and inspect for continuity using a multimeter.
• If blown, replace with a new fuse of the same amperage.

3. Inspect and Replace the Fuel Pump Relay

• Locate the fuel pump relay in the fuse box or relay panel.
• Remove the relay and test it by swapping with a similar relay (if available).
• If faulty, replace the relay with a new one.

4. Testing Voltage at the Fuel Pump Connector

• Reconnect the negative battery terminal.
• Turn the ignition key to the ON position (do not start the engine).
• Use a multimeter to check for voltage at the fuel pump connector.
• If no voltage is present, trace back to the relay and wiring harness.

5. Inspect Wiring and Connectors

• Visually inspect the wiring harness for fraying, cuts, or corrosion.
• Clean any corroded connectors with an electrical contact cleaner.
• Repair or replace damaged wiring as necessary.

6. Test the Fuel Pump Functionality

• Locate the fuel pump assembly in the fuel tank.
• Disconnect the fuel lines and electrical connector from the pump.
• Apply battery voltage directly to the fuel pump terminals to check for operation.
• If the pump operates, reassemble the components. If it does not, replace the fuel pump.