AutoCodes – Toyota – B2784 2014 Toyota RAV4

B2784 2014 Toyota RAV4 Code - Antenna Coil Open / Short

Quick Answer

When an open or short circuit is detected in the Transponder Key Amplifier Coil built into the Engine Switch, the Certification ECU (Smart Key ECU Assembly) stores this Diagnostic Trouble Code (DTC). Common causes include With Smart Key System, Faulty Engine Switch, Engine Switch harness is open or shorted. 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: B2784 2014 Toyota RAV4 indicates Antenna Coil Open / Short.
Common causes: Common causes include With Smart Key System, Faulty Engine Switch, Engine Switch harness is open or shorted.
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 355

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 16, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2784 2014 Toyota RAV4 Description

When an open or short circuit is detected in the Transponder Key Amplifier Coil built into the Engine Switch, the Certification ECU (Smart Key ECU Assembly) stores this Diagnostic Trouble Code (DTC). This DTC is also stored as a past DTC.
For vehicles without Smart Key System, when an open or short circuit is detected in the antenna coil built into the transponder key coil, the transponder key ECU assembly stores this DTC.

OBDII Code B2784 2014 Toyota RAV4 - Antenna Coil Open / Short - AutoCodes.com — B2784 2014 Toyota RAV4 Code - Antenna Coil Open / Short

What does this mean?

What are the Possible Causes of the DTC B2784 2014 Toyota RAV4?

With Smart Key System

Faulty Engine Switch
Engine Switch harness is open or shorted
Engine Switch circuit poor electrical connection
Faulty Certification ECU (Smart Key ECU Assembly)
Without Smart Key System
Faulty Transponder Key Coil
Transponder Key Coil harness is open or shorted
Transponder Key Coil circuit poor electrical connection
Faulty Transponder Key ECU Assembly

How to Fix the DTC B2784 2014 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 B2784 2014 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 B2784 2014 Toyota RAV4 code?

Need more information on how to fix the B2784 2014 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2784 2014 Toyota RAV4 code diagnosed by a professional: Find a repair shop in your area

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 B2784 2014 Toyota RAV4 Code

1. What are the common symptoms of OBDII code B2784 in a 2014 Toyota RAV4?

The common symptoms of OBDII code B2784 in a 2014 Toyota RAV4 include issues with the radio reception, poor AM/FM signal quality, and potential problems with keyless entry system.

2. What does the OBDII code B2784 "Antenna Coil Open / Short" mean in a 2014 Toyota RAV4?

The OBDII code B2784 in a 2014 Toyota RAV4 indicates a detected open or short circuit in the antenna coil, affecting the operation of the vehicle's radio and keyless entry systems.

3. What are the possible causes of OBDII code B2784 in a 2014 Toyota RAV4?

Possible causes of OBDII code B2784 in a 2014 Toyota RAV4 include damaged or faulty antenna coil, wiring issues, poor electrical connections, or a malfunctioning radio or keyless entry module.

4. How can I diagnose the OBDII code B2784 in my 2014 Toyota RAV4?

Diagnosing OBDII code B2784 in a 2014 Toyota RAV4 involves inspecting the antenna coil and its wiring for any visible damage, testing electrical connections, and using a multimeter to check for continuity and resistance.

5. Can I repair OBDII code B2784 in my 2014 Toyota RAV4 myself?

Repairing OBDII code B2784 in a 2014 Toyota RAV4 may be possible for those with automotive repair experience. However, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

6. Is it safe to continue driving my 2014 Toyota RAV4 with OBDII code B2784?

It is generally safe to drive your 2014 Toyota RAV4 with OBDII code B2784, but it is recommended to address the issue promptly to avoid potential problems with the radio and keyless entry systems.

7. How much does it typically cost to repair OBDII code B2784 in a 2014 Toyota RAV4?

The cost to repair OBDII code B2784 in a 2014 Toyota RAV4 can vary depending on the exact cause of the issue and the labor rates of the repair shop. It is advisable to obtain quotes from different mechanics or dealerships.

8. Can extreme weather conditions cause OBDII code B2784 to trigger in a 2014 Toyota RAV4?

Extreme weather conditions, such as exposure to moisture or extreme temperatures, can potentially contribute to the triggering of OBDII code B2784 in a 2014 Toyota RAV4 by affecting the antenna coil or its connections.