what does code B2799 indicate in my Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety during the repair.
• Required tools: OBD-II scanner, multimeter, basic hand tools.

2. Key Fob Inspection and Replacement

1. Remove the battery cover of the key fob using a small flathead screwdriver.
2. Replace the old battery with a new one (typically CR2032) ensuring correct polarity.
3. Reassemble the key fob and test its functionality.

3. Immobilizer System Inspection

1. Inspect the wiring harness connected to the immobilizer unit for frays or corrosion.
2. Clean any corroded connectors using electrical contact cleaner.
3. Reconnect all wiring securely and ensure there are no loose connections.

4. Key Reprogramming

1. Insert the key into the ignition and turn it to the "ON" position without starting the engine.
2. Leave it in the "ON" position for about 10 minutes or until the security light goes off.
3. Turn the key to "OFF" and remove it, then repeat this process for any additional keys.