AutoCodes – Scion – B1905 Scion

B1905 Scion 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 Scion 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 1,015

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

What does this mean?

What are the Possible Causes of the DTC B1905 Scion?

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 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 B1905 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 B1905 Scion code?

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

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Get the B1905 Scion 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 B1905 Scion Code

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

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

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

- Possible causes include damaged wiring, a faulty pretensioner squib in the left front seatbelt, or a blown fuse in the airbag system.

3. How serious is the OBDII code B1905 in a Scion and should it be repaired immediately?

- This code indicates a problem with the front left seatbelt pretensioner system, which is essential for occupant safety. It is recommended to address this issue promptly to ensure proper operation of the safety system.

4. Can I drive my Scion with the OBDII code B1905 present or should I avoid driving until it's fixed?

- It is generally not advisable to drive the vehicle with an active airbag system fault code like B1905, as it could compromise the effectiveness of the seatbelt pretensioner in the event of a collision.

5. How can I diagnose and repair the OBDII code B1905 in my Scion indicating a short in the front pretensioner squib left circuit?

- Diagnosing and repairing this issue typically involves inspecting the wiring and connections in the front left seatbelt pretensioner system, checking the squib for continuity, and addressing any faults found.

6. Are there any DIY tips for fixing the OBDII code B1905 in a Scion related to a short in the front pretensioner squib left circuit?

- While some basic troubleshooting like checking for loose connections or damaged wiring can be done by DIY enthusiasts, resolving the underlying cause of the code may require specialized tools and expertise best handled by a professional mechanic.

7. How much does it cost to repair the OBDII code B1905 in a Scion caused by a short in the front pretensioner squib left circuit?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing the pretensioner squib, repairing wiring, or resetting the airbag system. Costs can range from a few hundred to over a thousand dollars.

8. Can resetting the OBDII code B1905 in a Scion fix the issue temporarily, or is a permanent repair necessary?

- Resetting the code may temporarily turn off the warning light, but if the underlying problem like a short in the front pretensioner squib left circuit is not addressed, the code is likely to reappear, and the safety system may remain compromised.

9. Is it safe to attempt to clear the OBDII code B1905 in a Scion without fixing the underlying problem?

- It is not recommended to clear the code without addressing the root cause, as it could mask a potentially serious safety issue with the front left seatbelt pretensioner system. Safety should always be the top priority in such cases.

10. How often does the OBDII code B1905 related to a short in the front pretensioner squib left circuit occur in Scion vehicles?

- While the occurrence rate can vary, issues with the front pretensioner squib left circuit leading to the B1905 code are not uncommon in Scion vehicles, especially as they age and components wear out. Regular maintenance and inspections can help prevent such faults.