why does my Toyota RAV4 Fifth Generation (2019-present) fuel gauge not work

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, screwdrivers.
• Safety Warnings: Disconnect the battery before working on electrical systems.

2. Access the Fuel Sender Unit

1. Relieve Fuel System Pressure:
   • Remove the fuel pump relay from the fuse box.
   • Start the engine and let it run until it stalls, indicating that the pressure has been relieved.
2. Disconnect the Battery:
   • Disconnect the negative terminal to ensure safety while working on electrical components.
3. Remove the Fuel Tank:
   • Lift the vehicle using a jack and secure it with jack stands.
   • Remove the fuel tank straps using a socket set.
   • Carefully lower the fuel tank and disconnect the fuel lines and electrical connectors from the fuel pump module.

3. Inspect and Replace Fuel Sender Unit

1. Remove the Fuel Sender Unit:
   • Unscrew the locking ring that secures the fuel sender unit to the tank using a suitable tool.
   • Carefully lift the sender unit out of the tank.
2. Inspect the Sender Unit:
   • Check the float arm for any signs of damage or obstruction.
   • Use a multimeter to test the resistance of the sender unit while moving the float arm up and down; it should change smoothly.
3. Replace if Necessary:
   • If the sender unit is faulty, replace it with a new unit.
   • Reinstall the locking ring, ensuring a snug fit without over-tightening.

4. Reassemble and Test

1. Reinstall the Fuel Tank:
   • Lift the fuel tank back into position and reconnect the fuel lines and electrical connectors.
   • Secure the tank with the straps and torque them to the manufacturer's specifications.
2. Reconnect the Battery:
   • Reconnect the negative terminal of the battery.
3. Start the Vehicle:
   • Start the engine and monitor the fuel gauge for proper function.