AutoCodes – Toyota – B27A4 2013 Toyota RAV4

B27A4 2013 Toyota RAV4 Code - Open in Passengers Side Rear Door Electrical Antenna Circuit

Quick Answer

The Certification ECU (Smart Key ECU Assembly) generates a request signal and transmits the signal to the Passengers Side Rear Door Outside Handle Assembly (electrical key antenna) at intervals of 0.25 seconds. Common causes include Faulty Passengers Side Rear Door Outside Handle Assembly, Passengers Side Rear Door Outside Handle Assembly harness is open or shorted, Passengers Side Rear Door Outside Handle Assembly circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B27A4 2013 Toyota RAV4 indicates Open in Passengers Side Rear Door Electrical Antenna Circuit.
Common causes
Common causes include Faulty Passengers Side Rear Door Outside Handle Assembly, Passengers Side Rear Door Outside Handle Assembly harness is open or shorted, Passengers Side Rear Door Outside Handle Assembly circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 250
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jan 18, 2023
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Code B27A4 2013 Toyota RAV4 Description

The Certification ECU (Smart Key ECU Assembly) generates a request signal and transmits the signal to the Passengers Side Rear Door Outside Handle Assembly (electrical key antenna) at intervals of 0.25 seconds. For the Passengers Side Rear Door Outside Handle Assembly (electrical key antenna) to detect when the electrical key transmitter sub-assembly is brought close to the vehicle, a signal requesting a response from the electrical key transmitter sub-assembly is transmitted within approximately 1 m (3.28 ft.) of the rear door at intervals of 0.25 seconds. The Diagnostic Trouble Code (DTC) B27A3 is stored by the Certification ECU (Smart Key ECU Assembly) when an open circuit is detected between the Certification ECU (Smart Key ECU Assembly) and Passengers Side Rear Door Outside Handle Assembly (electrical key antenna).
OBDII Code B27A4 2013 Toyota RAV4 - Open in Passengers Side Rear Door Electrical Antenna Circuit - AutoCodes.com
B27A4 2013 Toyota RAV4 Code - Open in Passengers Side Rear Door Electrical Antenna Circuit

What are the Possible Causes of the DTC B27A4 2013 Toyota RAV4?

  • Faulty Passengers Side Rear Door Outside Handle Assembly
  • Passengers Side Rear Door Outside Handle Assembly harness is open or shorted
  • Passengers Side Rear Door Outside Handle Assembly circuit poor electrical connection
  • Faulty Certification ECU (Smart Key ECU Assembly)

How to Fix the DTC B27A4 2013 Toyota RAV4?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B27A4 2013 Toyota RAV4 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B27A4 2013 Toyota RAV4 code?

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Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B27A4 2013 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B27A4 in a 2013 Toyota RAV4?

The common symptoms include issues with the remote keyless entry system and poor radio reception.

2. What does the OBDII code B27A4 indicate in a 2013 Toyota RAV4?

The code signifies an open circuit in the passengers side rear door electrical antenna circuit.

3. What are the potential causes of the B27A4 OBDII code in a 2013 Toyota RAV4?

Possible causes include a damaged antenna, wiring issues, or a faulty antenna amplifier.

4. How can I diagnose the source of the open circuit causing the B27A4 code in my 2013 Toyota RAV4?

You can use a multimeter to test the continuity of the antenna circuit wiring and check for any visible damage to the antenna or wiring.

5. Can I repair the open circuit in the passengers side rear door electrical antenna circuit myself?

If you have experience with automotive electrical systems, you may be able to repair the issue by replacing damaged wiring or components.

6. Is it necessary to visit a dealership for repairs related to the B27A4 OBDII code in a 2013 Toyota RAV4?

While visiting a dealership is recommended for complex repairs, you can address basic issues like wiring repairs yourself if you have the necessary skills.

7. Will fixing the open circuit causing the B27A4 code resolve all related issues in my 2013 Toyota RAV4?

Fixing the open circuit should resolve problems with the remote keyless entry system and radio reception associated with the passengers side rear door antenna.

8. How can I prevent future occurrences of the B27A4 OBDII code in my 2013 Toyota RAV4?

Regularly inspecting the antenna circuit for damage and ensuring proper maintenance of the electrical components can help prevent the code from reoccurring.

9. Is the B27A4 OBDII code a common issue in 2013 Toyota RAV4 vehicles?

While not extremely common, issues with the electrical antenna circuit can occur in 2013 Toyota RAV4 models, leading to the B27A4 code.

10. Can a faulty passengers side rear door electrical antenna circuit impact the overall performance of my 2013 Toyota RAV4?

Yes, a malfunctioning antenna circuit can affect the functionality of keyless entry systems and lead to poor radio reception in the vehicle.

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