my Toyota Highlander Third Generation (2014-2019) fuel gauge is stuck on empty, what should I do

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a level surface, and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Access the Fuel Sending Unit

• Tools Required: Socket set, flathead screwdriver
• Locate the access panel for the fuel pump/sending unit, typically found under the rear seat or in the trunk.
• Remove the access panel screws with a socket or screwdriver.
• Carefully lift the panel to expose the fuel sending unit.

3. Inspect the Fuel Sending Unit

• Disconnect the electrical connector from the fuel sending unit.
• Use a multimeter to measure the resistance across the sending unit terminals.
  • Normal resistance should vary from approximately 0 to 90 ohms depending on the fuel level.
• If resistance is outside this range, replace the fuel sending unit.

4. Replace the Fuel Sending Unit (if necessary)

• Tools Required: Socket set, torque wrench
• Remove the retaining screws or ring that holds the sending unit in place.
• Carefully lift out the old sending unit and replace it with the new one.
• Reconnect the electrical connector and ensure it is secure.
• Reinstall the access panel and secure with screws.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the vehicle and check if the fuel gauge moves to an accurate reading.
• If the gauge works correctly, replace any interior panels removed during access.