what does the B2799 code mean in my Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is in a well-ventilated area.
• Disconnect the negative battery terminal to ensure safety.

2. Key Fob Battery Replacement

• Tools Required: Small flathead screwdriver.
• Instructions:
  1. Open the key fob using the screwdriver to access the battery compartment.
  2. Remove the old battery, noting its orientation.
  3. Insert the new battery (typically CR2032) in the same orientation as the old one.
  4. Reassemble the key fob and test its functionality.

3. Inspect and Repair Wiring

• Tools Required: Multimeter, wiring diagrams.
• Instructions:
  1. Use the wiring diagrams to locate the Smart Key System antenna and related wiring.
  2. Inspect the wiring harness for any signs of damage, fraying, or corrosion.
  3. Use a multimeter to check continuity in the wiring; repair or replace any faulty sections.

4. Reprogram Smart Key Fob (if necessary)

• Tools Required: OBD-II scanner capable of key programming.
• Instructions:
  1. Follow the manufacturer's instructions for programming the key fob using the OBD-II scanner.
  2. Ensure the scanner is connected to the vehicle's diagnostic port.
  3. Clear any existing trouble codes and reprogram the key fob as per the scanner's guidance.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the vehicle to confirm that the B2799 code is resolved and the Smart Key System is functioning properly.