AutoCodes – Scion – B2274 Scion

B2274 Scion 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 Scion 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 624

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B2274 Scion 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 Scion - ACC Monitor Malfunction - AutoCodes.com — B2274 Scion Code - ACC Monitor Malfunction

What does this mean?

What are the Possible Causes of the DTC B2274 Scion?

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 Scion?

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 Scion 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 Scion code?

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

Need Help with the Code?

Get the B2274 Scion 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 Scion Code

1. What does the OBDII code B2274 mean on a Scion?

B2274 indicates an "ACC Monitor Malfunction," which is related to the accessory (ACC) power circuit not functioning as expected.

2. What are the common symptoms of code B2274 on a Scion?

Symptoms may include issues with accessory power (e.g., radio or interior electronics not working), possible warning lights on the dashboard, and intermittent power failures.

3. What causes the B2274 code to appear on a Scion?

Common causes include a faulty ignition switch, damaged ACC circuit wiring, a blown fuse, or a malfunctioning control module.

4. Can a loose connection cause the B2274 code?

Yes, loose or corroded wiring connections in the ACC circuit can trigger the B2274 code.

5. How do I diagnose the B2274 code on a Scion?

Start by checking the ACC fuse, inspecting the ignition switch and related wiring for damage, and testing the circuit for continuity with a multimeter.

6. Can I still drive my Scion with the B2274 code active?

While the car may still be drivable, accessory systems may not work properly, and ignoring the issue could lead to further electrical problems.

7. How do I fix the B2274 code on my Scion?

Repairs may include replacing a blown ACC fuse, repairing or replacing damaged wiring, or replacing a faulty ignition switch.

8. Is the B2274 code specific to Scion vehicles?

While B2274 may appear in other vehicles, it is often specific to Toyota and Scion models with similar electrical systems.

9. Can clearing the B2274 code fix the problem?

Clearing the code may temporarily reset the system, but the underlying issue must be addressed to prevent it from returning.

10. How much does it cost to repair the B2274 code on a Scion?

Repair costs depend on the root cause, ranging from a simple fuse replacement (under $20) to ignition switch replacement or wiring repairs, which may cost $100-$300 or more.