AutoCodes – Toyota – B2274 2016 Toyota RAV4

B2274 2016 Toyota RAV4 Code - ACC Monitor Malfunction

Quick Answer

This Diagnostic Trouble Code (DTC) is stored when a malfunction in the ACC output circuit is detected. Common causes include Faulty ACC Relay, Faulty Certification ECU (Smart Key ECU Assembly), Certification ECU 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: B2274 2016 Toyota RAV4 indicates ACC Monitor Malfunction.
Common causes: Common causes include Faulty ACC Relay, Faulty Certification ECU (Smart Key ECU Assembly), Certification ECU 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 175

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 13, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2274 2016 Toyota RAV4 Description

This Diagnostic Trouble Code (DTC) is stored when a malfunction in the ACC output circuit is detected. The ACC output circuit is the circuit that goes from the ACC output terminal of the Certification ECU (Smart Key ECU Assembly) to the ACC Relay.

OBDII Code B2274 2016 Toyota RAV4 - ACC Monitor Malfunction - AutoCodes.com — B2274 2016 Toyota RAV4 Code - ACC Monitor Malfunction

What does this mean?

What are the Possible Causes of the DTC B2274 2016 Toyota RAV4?

Faulty ACC Relay
Faulty Certification ECU (Smart Key ECU Assembly)
Certification ECU harness is open or shorted
Certification ECU circuit poor electrical connection

How to Fix the DTC B2274 2016 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 B2274 2016 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 B2274 2016 Toyota RAV4 code?

Need more information on how to fix the B2274 2016 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2274 2016 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 B2274 2016 Toyota RAV4 Code

1. What does the OBDII code B2274 mean for a 2016 Toyota RAV4?

The code B2274 indicates an "ACC Monitor Malfunction," which refers to an issue with the Adaptive Cruise Control (ACC) system's monitoring or functionality.

2. What are the common symptoms of the B2274 code in a Toyota RAV4?

Symptoms include the Adaptive Cruise Control not working, warning lights on the dashboard, and possible error messages related to the ACC system.

3. What causes the B2274 code to appear in a 2016 Toyota RAV4?

Common causes include a faulty radar sensor, a misaligned sensor, damaged wiring or connectors, or software issues within the ACC system.

4. How can I troubleshoot the B2274 code in my Toyota RAV4?

Start by visually inspecting the ACC radar sensor for dirt, damage, or misalignment. Check the wiring and connectors for damage or corrosion. If no issues are found, a diagnostic scan tool may be needed to perform further tests.

5. Can a dirty radar sensor cause the B2274 code in a Toyota RAV4?

Yes, a dirty or obstructed radar sensor can cause the code as it may prevent the ACC system from functioning properly.

6. How is the B2274 code fixed on a 2016 Toyota RAV4?

Repairs may include cleaning or realigning the radar sensor, repairing or replacing damaged wiring, or recalibrating the ACC system using a scan tool.

7. Is it safe to drive a 2016 Toyota RAV4 with the B2274 code?

While the vehicle may still be drivable, the Adaptive Cruise Control system will likely be disabled, which could affect driving convenience and safety. Itâ€™s best to address the issue promptly.

8. Does the B2274 code require professional repair?

In most cases, yes, as diagnosing and fixing ACC system issues often requires specialized tools and knowledge, such as radar sensor calibration.

9. Can software updates fix the B2274 code in a Toyota RAV4?

Yes, if the issue is related to a software glitch, a software update from a Toyota dealership may resolve the problem.

10. How much does it cost to repair the B2274 code on a 2016 Toyota RAV4?

Repair costs vary depending on the exact issue, but cleaning or recalibrating the radar sensor may cost less than replacing damaged components or wiring. Expect a range between $150 and $800.