To reset the tire pressure monitoring system on a 2021 Toyota RAV4, follow these detailed steps:

Step 1: Ensure Proper Tire Pressure

• Make sure all tires, including the spare tire (if equipped), are inflated to the recommended pressure levels as stated in the owner’s manual or on the tire information label typically located on the driver’s side door jamb.

Step 2: Start the Vehicle

• Turn on the ignition by pressing the push button start once without pressing the brake pedal to switch to the “On” position. Do not start the engine.

Step 3: Locate the Reset Button

• The Tire Pressure Monitoring System (TPMS) reset button is typically located under the steering wheel. It could be near the dashboard on the driver's side. If you have trouble finding it, reference the vehicle’s owner manual.

Step 4: Reset the TPMS

• Press and hold the TPMS reset button until the TPMS indicator light located on the dashboard starts blinking slowly three times. This process generally takes about 3 seconds.

Step 5: Continue with the Ignition

• After releasing the TPMS reset button, keep the ignition on for about 5 minutes which allows the system to record the current tire pressure settings.

Step 6: Drive the Vehicle

• Once you complete the reset process, drive the vehicle at a speed above 25 mph for around 10 to 30 minutes. This will allow the sensor to refresh and recalibrate accurately with the tire pressure settings you've adjusted.

Step 7: Verify the Reset

• After the drive, check to ensure the TPMS warning light is off. If the light remains illuminated or blinks, there might be an issue with a sensor, or some tires may still not have the correct pressure, in which case you should recheck the tire pressures and repeat the process if necessary.

Note: If the system continues to malfunction, or if you're not able to reset it following these steps, consider contacting a local dealership or professional mechanic for further assistance as there might be a more complex issue with the TPMS itself.