AutoCodes – Toyota – B1928 Toyota

B1928 Toyota Code - Short To Positive In Rear Pretensioner Squib LH Circuit

Quick Answer

The Rear Pretensioner Squib Left (LH) Circuit consists of the Center Airbag Sensor Assembly and the Seat Outer Belt Assembly Left (LH). Common causes include Faulty Seat Outer Belt Assembly Left (LH) (Rear Pretensioner Squib LH), Seat Outer Belt Assembly Left (LH) harness is open or shorted, Seat Outer Belt Assembly Left (LH) 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: B1928 Toyota indicates Short To Positive In Rear Pretensioner Squib LH Circuit.
Common causes: Common causes include Faulty Seat Outer Belt Assembly Left (LH) (Rear Pretensioner Squib LH), Seat Outer Belt Assembly Left (LH) harness is open or shorted, Seat Outer Belt Assembly Left (LH) 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 959

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 Jul 29, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1928 Toyota Description

The Rear Pretensioner Squib Left (LH) Circuit consists of the Center Airbag Sensor Assembly and the Seat Outer Belt Assembly Left (LH). This circuit instructs the Supplemental Restraint System (SRS) to deploy when deployment conditions are met. The Diagnostic Trouble Code (DTC) is stored when a malfunction is detected in the Rear Pretensioner Squib LH Circuit.

OBDII Code B1928 Toyota - Short To Positive In Rear Pretensioner Squib LH Circuit - AutoCodes.com — B1928 Toyota Code - Short To Positive In Rear Pretensioner Squib LH Circuit

What does this mean?

What are the Possible Causes of the DTC B1928 Toyota?

Faulty Seat Outer Belt Assembly Left (LH) (Rear Pretensioner Squib LH)
Seat Outer Belt Assembly Left (LH) harness is open or shorted
Seat Outer Belt Assembly Left (LH) circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1928 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 B1928 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 B1928 Toyota code?

Need more information on how to fix the B1928 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1928 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 B1928 Toyota Code

1. What are the common symptoms of OBDII code B1928 in a Toyota related to a short to positive in the rear pretensioner squib LH circuit?

The common symptoms include an illuminated airbag warning light on the dashboard, failure of the seatbelt pretensioner to deploy in the event of a collision, and potential issues with the overall airbag system.

2. What are the possible causes of OBDII code B1928 indicating a short to positive in the rear pretensioner squib LH circuit in a Toyota?

Potential causes include damaged wiring or connectors in the rear pretensioner squib LH circuit, a faulty pretensioner squib LH unit, or issues with the airbag control module.

3. How can I diagnose the source of the short to positive in the rear pretensioner squib LH circuit causing OBDII code B1928 in my Toyota?

Diagnosis typically involves inspecting the wiring and connectors in the rear pretensioner squib LH circuit for damage, testing the pretensioner squib LH unit for proper functionality, and checking the airbag control module for any faults.

4. Can I drive my Toyota with OBDII code B1928 related to a short to positive in the rear pretensioner squib LH circuit?

It's not recommended to drive the vehicle with this issue unresolved as it may compromise the effectiveness of the airbag system, potentially putting occupants at risk in the event of a collision.

5. How can I repair OBDII code B1928 indicating a short to positive in the rear pretensioner squib LH circuit in my Toyota?

Repair options may include repairing or replacing damaged wiring and connectors, replacing the faulty pretensioner squib LH unit, or resetting the airbag control module after addressing the underlying issue.

6. Is it possible to reset the OBDII code B1928 without addressing the root cause in a Toyota?

Simply clearing the code without fixing the underlying issue will likely result in the code reappearing once the system detects the problem again, so it's important to address the root cause to prevent future occurrences.

7. How can I prevent OBDII code B1928 related to a short to positive in the rear pretensioner squib LH circuit from recurring in my Toyota?

Regularly inspecting the airbag system components, ensuring proper maintenance of wiring and connectors, and addressing any issues promptly can help prevent the recurrence of this code.

8. Are there any safety risks associated with OBDII code B1928 in a Toyota caused by a short to positive in the rear pretensioner squib LH circuit?

Yes, unresolved issues related to the airbag system can pose safety risks as the system may not deploy properly in the event of a collision, potentially leading to increased injury to occupants.

9. Can a DIY enthusiast with some automotive experience repair OBDII code B1928 in a Toyota by themselves?

While some repairs related to this code may be within reach for DIY enthusiasts, it's crucial to have the necessary knowledge and tools to work on the airbag system safely and effectively. Consider consulting a professional if unsure.

10. How long does it typically take to repair OBDII code B1928 linked to a short to positive in the rear pretensioner squib LH circuit in a Toyota?

The repair time can vary based on the specific issue identified, the availability of parts, and the expertise of the person performing the repair. It's advisable to consult a professional for a more accurate estimate.