what does error code B1261 mean for my Toyota RAV4 Fourth Generation (2013-2018)?

Solution

1. Preparation

• Gather necessary tools: OBD-II scanner, small screwdriver, multimeter, and replacement key fob battery (typically CR2032).
• Ensure the vehicle is in a safe working environment.

2. Replace Key Fob Battery

1. Use the small screwdriver to gently pry open the key fob.
2. Remove the old battery and use a multimeter to verify that it has low voltage (if applicable).
3. Insert the new battery in the correct orientation (+ and - terminals).
4. Reassemble the key fob securely.

3. Inspect and Repair Smart Key Antenna

1. Locate the Smart Key antenna, usually situated near the ignition switch.
2. Disconnect the antenna connector from the vehicle's wiring harness.
3. Inspect for any signs of corrosion or damage on the connector and wiring.
4. Clean the connector with electrical contact cleaner if necessary.
5. Reconnect the antenna and ensure a secure fit.

4. Testing the System

1. Attempt to start the vehicle with the replaced key fob.
2. Observe if the Smart Key malfunction warning disappears.
3. Check if remote functions (locking/unlocking) operate correctly from the key fob.