AutoCodes – Toyota – B1903 Toyota

B1903 Toyota Code - Short to Positive in Front Pretensioner Squib Right Circuit

Quick Answer

The Front Pretensioner Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and Front Seat Outer Belt Assembly Right (RH). Common causes include Faulty Front Seat Outer Belt Assembly Right (RH) (Front Pretensioner Squib Right), Front Seat Outer Belt Assembly Right harness is open or shorted, Front Seat Outer Belt Assembly Right 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: B1903 Toyota indicates Short to Positive in Front Pretensioner Squib Right Circuit.
Common causes: Common causes include Faulty Front Seat Outer Belt Assembly Right (RH) (Front Pretensioner Squib Right), Front Seat Outer Belt Assembly Right harness is open or shorted, Front Seat Outer Belt Assembly Right 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 2,774

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 03, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1903 Toyota Description

The Front Pretensioner Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and Front Seat Outer Belt Assembly Right (RH). 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 Right Circuit.

OBDII Code B1903 Toyota - Short to Positive in Front Pretensioner Squib Right Circuit - AutoCodes.com — B1903 Toyota Code - Short to Positive in Front Pretensioner Squib Right Circuit

What does this mean?

What are the Possible Causes of the DTC B1903 Toyota?

Faulty Front Seat Outer Belt Assembly Right (RH) (Front Pretensioner Squib Right)
Front Seat Outer Belt Assembly Right harness is open or shorted
Front Seat Outer Belt Assembly Right circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1903 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 B1903 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 B1903 Toyota code?

Need more information on how to fix the B1903 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1903 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

B1903 2013 Toyota RAV4 — Short to Positive in Front Pretensioner Squib Right Circuit
B1903 2014 Toyota RAV4 — Short to Positive in Front Pretensioner Squib Right Circuit
B1903 2015 Toyota RAV4 — Short to Positive in Front Pretensioner Squib Right Circuit
B1903 2016 Toyota RAV4 — Short to Positive in Front Pretensioner Squib Right Circuit
B1903 2017 Toyota RAV4 — Short to Positive in Front Pretensioner Squib Right Circuit
B1903 2018 Toyota RAV4 — Short to Positive in Front Pretensioner Squib Right 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 B1903 Toyota Code

1. What are the common symptoms of OBDII code B1903 in a Toyota related to the Front Pretensioner Squib Right Circuit?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential non-deployment of the front right airbag during a collision.

2. What does the OBDII code B1903 "Short to Positive in Front Pretensioner Squib Right Circuit" mean in a Toyota?

- This code indicates a potential short circuit to a positive voltage in the front pretensioner squib right circuit, which could impact the proper functioning of the airbag system.

3. What are the possible causes of OBDII code B1903 in a Toyota?

- The code B1903 can be triggered by issues such as damaged wiring in the front pretensioner squib right circuit, faulty pretensioner squib, or a problem with the airbag control module.

4. How can I diagnose the OBDII code B1903 in my Toyota?

- Diagnosis typically involves using a diagnostic scanner to retrieve the specific trouble code, inspecting the wiring and connections in the front right airbag system, and testing the components for proper operation.

5. Is it safe to drive my Toyota with the OBDII code B1903?

- It is not recommended to drive the vehicle with an active airbag fault code like B1903, as it could compromise the effectiveness of the airbag system in the event of a collision.

6. How can I repair OBDII code B1903 in a Toyota?

- Repairing this code may involve fixing the short circuit in the front pretensioner squib right circuit, replacing damaged wiring or connectors, repairing or replacing the pretensioner squib, or addressing any issues with the airbag control module.

7. Can I reset the OBDII code B1903 in my Toyota without fixing the underlying issue?

- While you can clear the code temporarily, it will likely reappear until the root cause of the problem is addressed and resolved.

8. Are there any safety precautions to consider when working on the airbag system related to code B1903 in a Toyota?

- It is crucial to disconnect the vehicle's battery and wait for the specified time before starting any repairs to prevent accidental airbag deployment.

9. How much does it typically cost to repair OBDII code B1903 in a Toyota at a dealership or repair shop?

- The cost of repairs can vary depending on the exact cause of the issue, but it may involve parts and labor expenses ranging from a few hundred to over a thousand dollars.

10. Can a DIY enthusiast with automotive knowledge fix the OBDII code B1903 issue in a Toyota?

- While some experienced DIYers may be able to diagnose and repair simple wiring issues, addressing airbag system faults like B1903 often requires specialized tools and expertise best handled by professionals.