How do I fix a stuck throttle in my 2022 Toyota Highlander?

Fixing a stuck throttle in a 2022 Toyota Highlander requires a careful and methodical approach to diagnose and resolve the issue. Below is a detailed step-by-step guide, including symptoms, diagnostic steps, tools required, and repair instructions.

Tools Required

• OBD-II scanner
• Multimeter
• Flathead screwdriver
• Phillips screwdriver
• Cleaning supplies (Throttle body cleaner, rags)
• Torque wrench
• Ratchet and socket set

Repair Instructions

Step 1: Clean the Throttle Body

1. Remove the intake duct: Disconnect any clamps and remove the intake duct to access the throttle body.
2. Clean the throttle body: Use throttle body cleaner and a rag to clean the inside of the throttle body, especially around the throttle plate. Be careful not to damage the TPS or other components.
3. Reassemble: Reinstall the intake duct securely.

Step 2: Replace Throttle Position Sensor (if necessary)

1. Remove the throttle body: If the TPS is faulty, you may need to remove the throttle body. Unbolt it using the appropriate socket and disconnect the electrical connector.
2. Replace TPS: Install the new TPS, ensuring it is oriented correctly. Tighten the screws to the manufacturer’s specifications.
3. Reinstall the throttle body: Bolt it back onto the intake manifold and reconnect the intake duct.

Step 3: Reset the Throttle Position

1. Reconnect the battery: If disconnected, reconnect the negative battery terminal.
2. Throttle relearn procedure: Start the vehicle and let it idle for a few minutes. Rev the engine a few times to allow the ECU to relearn the throttle position.
3. Test drive: Take the vehicle for a test drive to ensure that the throttle operates smoothly and any warning lights are cleared.

Final Checks

• Check for DTCs again: After repairs and test drive, use the OBD-II scanner to ensure no new codes have appeared.
• Monitor performance: Check for any unusual behavior in throttle response or engine operation.

By following these steps, you should be able to diagnose and fix a stuck throttle issue in your 2022 Toyota Highlander effectively. If issues persist, consider consulting a professional technician for further assistance.