AutoCodes – Toyota – B1628 Toyota

B1628 Toyota Code - Side Airbag Sensor Assembly Left Initialization Incomplete

Quick Answer

The Side Collision Sensor Left (LH) circuit (to determine deployment of the Front Seat Side Airbag Assembly LH and Curtain Shield Airbag Assembly LH) is composed of the Center Airbag Sensor Assembly, Side Airbag Sensor LH and Rear Airbag Sensor LH. Common causes include Faulty Side Airbag Sensor Left (LH), Faulty Rear Airbag Sensor Left (LH), Faulty Center Airbag Sensor Assembly. 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: B1628 Toyota indicates Side Airbag Sensor Assembly Left Initialization Incomplete.
Common causes: Common causes include Faulty Side Airbag Sensor Left (LH), Faulty Rear Airbag Sensor Left (LH), Faulty Center Airbag Sensor Assembly.
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 5,918

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 May 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1628 Toyota Description

The Side Collision Sensor Left (LH) circuit (to determine deployment of the Front Seat Side Airbag Assembly LH and Curtain Shield Airbag Assembly LH) is composed of the Center Airbag Sensor Assembly, Side Airbag Sensor LH and Rear Airbag Sensor LH. The Side Airbag Sensor LH and Rear Airbag Sensor LH detect impacts to the vehicle and send signals to the Center Airbag Sensor Assembly to determine if the airbag should be deployed. The Diagnostic Trouble Code (DTC) is stored when a malfunction is detected in the Side Collision Sensor LH circuit (to determine deployment of the Front Seat Side Airbag Assembly LH and Curtain Shield Airbag Assembly LH).

OBDII Code B1628 Toyota - Side Airbag Sensor Assembly Left Initialization Incomplete - AutoCodes.com — B1628 Toyota Code - Side Airbag Sensor Assembly Left Initialization Incomplete

What does this mean?

What are the Possible Causes of the DTC B1628 Toyota?

Faulty Side Airbag Sensor Left (LH)
Faulty Rear Airbag Sensor Left (LH)
Faulty Center Airbag Sensor Assembly
Center Airbag Sensor Assembly harness is open or shorted
Center Airbag Sensor Assembly circuit poor electrical connection

How to Fix the DTC B1628 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 B1628 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 B1628 Toyota code?

Need more information on how to fix the B1628 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1628 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 B1628 Toyota Code

1. What are the common symptoms of OBDII code B1628 in a Toyota related to the Side Airbag Sensor Assembly Left Initialization Incomplete?

The common symptoms include the airbag warning light illuminating on the dashboard and potentially a diagnostic trouble code related to the side airbag sensor assembly left initialization incomplete.

2. What are the possible causes of OBDII code B1628 in a Toyota?

The code B1628 can be triggered by issues such as a faulty side airbag sensor assembly, damaged wiring or connectors, or a communication error within the airbag system.

3. How can I diagnose the cause of OBDII code B1628 in my Toyota?

Diagnosing the issue typically involves using a professional OBDII scanner to retrieve the specific trouble code, inspecting the side airbag sensor assembly and its connections, and checking for any visible damage to the wiring.

4. Can I reset OBDII code B1628 on my Toyota without fixing the underlying issue?

While you can clear the code temporarily, the underlying issue causing the code will persist. It is important to diagnose and repair the problem to ensure the safety and functionality of the side airbag system.

5. Is it safe to drive my Toyota with OBDII code B1628 present?

It is not recommended to drive the vehicle with an active airbag-related fault code like B1628, as it indicates a potential issue with the side airbag system that may affect its proper deployment in the event of a collision.

6. How can I repair OBDII code B1628 in my Toyota?

Repairing the code B1628 may involve replacing the faulty side airbag sensor assembly, repairing damaged wiring or connectors, and ensuring proper initialization of the left side airbag sensor assembly.

7. Can I fix OBDII code B1628 in my Toyota at home, or do I need to take it to a professional mechanic?

While some DIY enthusiasts may be able to address simpler causes like loose connections, diagnosing and repairing more complex issues related to the side airbag system is best left to a professional mechanic with the necessary tools and expertise.

8. How much does it typically cost to repair OBDII code B1628 in a Toyota?

The cost of repairing OBDII code B1628 can vary depending on the specific cause of the issue, the labor rates of the repair shop, and the cost of any replacement parts needed. It is recommended to obtain quotes from different mechanics to compare prices.

9. Are there any safety precautions I should take when working on the side airbag system to fix OBDII code B1628 in my Toyota?

When working on the side airbag system, it is crucial to disconnect the vehicle's battery, follow proper safety procedures outlined in the vehicle's service manual, and consider the potential risks associated with airbag deployment.

10. Will fixing OBDII code B1628 affect my Toyota's warranty or insurance coverage?

If your Toyota is still under warranty, it is advisable to have the issue addressed by an authorized dealer or repair center to ensure compliance with warranty terms. Repairing OBDII code B1628 should not impact your insurance coverage unless it relates to a previous claim or safety concern.