AutoCodes – Toyota – B2090 Toyota

B2090 Toyota Code - Driving Support System Malfunction

Quick Answer

The Seat Belt Control ECU receives collision information from the Driving Support ECU and brake booster with master cylinder (skid control ECU) via CAN communication, and tightens the seat belt by operating the motor inside the front seat outer belt. Common causes include Faulty Seat Belt Control ECU, Seat Belt Control ECU harness is open or shorted, Seat Belt Control ECU 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: B2090 Toyota indicates Driving Support System Malfunction.
Common causes: Common causes include Faulty Seat Belt Control ECU, Seat Belt Control ECU harness is open or shorted, Seat Belt Control ECU 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 8,932

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Sep 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2090 Toyota Description

The Seat Belt Control ECU receives collision information from the Driving Support ECU and brake booster with master cylinder (skid control ECU) via CAN communication, and tightens the seat belt by operating the motor inside the front seat outer belt. When the driving support ECU detects a malfunction in the dynamic radar cruise control system and pre-collision system, the malfunction information is sent to the seat belt control ECU, which outputs this Diagnostic Trouble Code (DTC). When DTC B2090 is detected, other DTCs are also stored by the driving support ECU (dynamic radar cruise control system and pre-collision system). Also, if the lane recognition camera sensor assembly beam axis adjustment is not performed after installing the lane recognition camera sensor assembly, DTC B2090 is stored.

OBDII Code B2090 Toyota - Driving Support System Malfunction - AutoCodes.com — B2090 Toyota Code - Driving Support System Malfunction

What does this mean?

What are the Possible Causes of the DTC B2090 Toyota?

Faulty Seat Belt Control ECU
Seat Belt Control ECU harness is open or shorted
Seat Belt Control ECU circuit poor electrical connection
Faulty Driving Support ECU

How to Fix the DTC B2090 Toyota?

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 B2090 Toyota 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 B2090 Toyota code?

Need more information on how to fix the B2090 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2090 Toyota code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B2090 Toyota Code

1. What are the common symptoms of OBDII code B2090 in a Toyota indicating a Driving Support System Malfunction?

The common symptoms include the malfunction indicator light (MIL) illuminating on the dashboard, issues with the vehicle's driving support features, and possible trouble codes related to the system.

2. What could cause the OBDII code B2090 in a Toyota, signaling a Driving Support System Malfunction?

Possible causes of this code include faulty sensors within the driving support system, wiring issues, software glitches, or a malfunctioning control module.

3. How serious is the Driving Support System Malfunction indicated by code B2090 in a Toyota?

While the severity can vary, it is important to address this issue promptly as it may affect the proper functioning of the vehicle's driving support features, potentially compromising safety.

4. Can I continue driving my Toyota with the OBDII code B2090 related to the Driving Support System Malfunction?

It is not recommended to continue driving the vehicle with this code present, as it could lead to further issues with the driving support system and potentially impact the vehicle's performance.

5. How can I diagnose and repair the OBDII code B2090 in my Toyota related to the Driving Support System Malfunction?

Diagnosis typically involves using a diagnostic scanner to read the trouble codes, followed by inspecting the driving support system components, wiring, and control module for any faults. Repair may involve replacing faulty parts or repairing wiring issues.

6. Are there any DIY tips for troubleshooting the OBDII code B2090 in a Toyota indicating a Driving Support System Malfunction?

While some basic checks like ensuring the sensor connections are secure and inspecting for visible wiring issues can be done, diagnosing and repairing this code may require specialized tools and expertise, so professional assistance is recommended.

7. Will resetting the OBDII code B2090 in my Toyota fix the Driving Support System Malfunction issue?

Simply clearing the code without addressing the underlying cause will not fix the problem. It is essential to diagnose the issue properly and carry out the necessary repairs to resolve the Driving Support System Malfunction.

8. How much can I expect to pay for repairing the OBDII code B2090 in a Toyota related to the Driving Support System Malfunction?

The cost of repair can vary depending on the specific cause of the issue, the parts needing replacement, and labor costs. It is advisable to consult a professional mechanic for an accurate diagnosis and cost estimate.

9. Are there any recalls or technical service bulletins (TSBs) related to the OBDII code B2090 and the Driving Support System Malfunction in Toyota vehicles?

It is recommended to check with authorized Toyota service centers or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any relevant recalls or TSBs addressing this specific issue in your vehicle.

10. Can the OBDII code B2090 in a Toyota indicating a Driving Support System Malfunction be a recurring problem?

If the underlying cause of the issue is not addressed during the repair, it is possible for the code to reappear. Proper diagnosis and repair are crucial to prevent the problem from recurring.