AutoCodes – Toyota – B1905 Toyota

B1905 Toyota Code - Short in Front Pretensioner Squib Left Circuit

Quick Answer

The Front Pretensioner Squib Left (LH) Circuit consists of the Center Airbag Sensor Assembly and Front Seat Outer Belt Assembly Left (LH). Common causes include Faulty Front Seat Outer Belt Assembly Left (LH) (Front Pretensioner Squib Left), Front Seat Outer Belt Assembly Left is open or shorted, Front Seat Outer Belt Assembly Left 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: B1905 Toyota indicates Short in Front Pretensioner Squib Left Circuit.
Common causes: Common causes include Faulty Front Seat Outer Belt Assembly Left (LH) (Front Pretensioner Squib Left), Front Seat Outer Belt Assembly Left is open or shorted, Front Seat Outer Belt Assembly Left 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 13,915

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 Dec 07, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1905 Toyota Description

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

OBDII Code B1905 Toyota - Short in Front Pretensioner Squib Left Circuit - AutoCodes.com — B1905 Toyota Code - Short in Front Pretensioner Squib Left Circuit

What does this mean?

What are the Possible Causes of the DTC B1905 Toyota?

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

How to Fix the DTC B1905 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 B1905 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 B1905 Toyota code?

Need more information on how to fix the B1905 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1905 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

B1905 2013 Toyota RAV4 — Short in Front Pretensioner Squib Left Circuit
B1905 2014 Toyota RAV4 — Short in Front Pretensioner Squib Left Circuit
B1905 2015 Toyota RAV4 — Short in Front Pretensioner Squib Left Circuit
B1905 2016 Toyota RAV4 — Short in Front Pretensioner Squib Left Circuit
B1905 2017 Toyota RAV4 — Short in Front Pretensioner Squib Left Circuit
B1905 2018 Toyota RAV4 — Short in Front Pretensioner Squib Left Circuit

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 B1905 Toyota Code

1. What are the common symptoms of OBDII code B1905 in a Toyota related to a short in the front pretensioner squib left circuit?

The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the left front seatbelt pretensioner system.

2. What could cause the OBDII code B1905 in a Toyota indicating a short in the front pretensioner squib left circuit?

Possible causes include damaged wiring, loose connections, a faulty pretensioner squib, or a problem with the airbag control module.

3. How can I diagnose the issue causing OBDII code B1905 in my Toyota?

You can start by checking the wiring and connections associated with the left front pretensioner squib, as well as inspecting the squib itself for any visible damage. It's also recommended to perform a thorough scan using an OBDII scanner.

4. Is it safe to drive my Toyota with OBDII code B1905 triggered?

It is not recommended to drive the vehicle with an active airbag-related fault code like B1905, as it could compromise the effectiveness of the airbag system in case of an accident.

5. Can I reset the OBDII code B1905 in my Toyota to see if it comes back?

While you can clear the code temporarily, it is essential to address the underlying issue causing the fault code to prevent it from reoccurring and ensure the safety of the airbag system.

6. What are the repair options for fixing OBDII code B1905 related to a short in the front pretensioner squib left circuit in a Toyota?

Repair options may include repairing or replacing damaged wiring, fixing connections, replacing the pretensioner squib if faulty, or addressing any issues with the airbag control module.

7. How much does it typically cost to repair OBDII code B1905 in a Toyota?

The cost of repairs can vary depending on the specific cause of the issue and the parts and labor involved. It's advisable to consult a professional mechanic for an accurate estimate.

8. Are there any safety precautions to keep in mind when working on the airbag system to resolve OBDII code B1905 in a Toyota?

It's crucial to disconnect the vehicle's battery and wait for the system to fully discharge before working on any components related to the airbag system to prevent accidental deployment.

9. Can I fix OBDII code B1905 in my Toyota by myself, or should I seek professional help?

While some DIY enthusiasts may attempt to diagnose and repair the issue, dealing with the airbag system can be complex and dangerous. It's recommended to seek help from a qualified mechanic for this type of repair.

10. How long does it typically take to repair OBDII code B1905 indicating a short in the front pretensioner squib left circuit in a Toyota?

The repair time can vary depending on the complexity of the issue and the availability of parts. A professional mechanic should be able to provide an estimate based on a thorough inspection of the system.