AutoCodes – Lexus – B1900 Lexus

B1900 Lexus Code - Short 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: B1900 Lexus indicates Short 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 3,199

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 B1900 Lexus 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 B1900 Lexus - Short in Front Pretensioner Squib Right Circuit - AutoCodes.com — B1900 Lexus Code - Short in Front Pretensioner Squib Right Circuit

What does this mean?

What are the Possible Causes of the DTC B1900 Lexus?

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 B1900 Lexus?

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 B1900 Lexus 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 B1900 Lexus code?

Need more information on how to fix the B1900 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1900 Lexus 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 B1900 Lexus Code

1. What are the common symptoms of OBDII code B1900 in a Lexus related to a short in the front pretensioner squib right circuit?

The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the airbag system's functionality.

2. What are some possible causes of the OBDII code B1900 in a Lexus indicating a short in the front pretensioner squib right circuit?

Possible causes can include wiring issues, a faulty pretensioner squib, a blown fuse, or a problem with the airbag control module.

3. How can I diagnose the OBDII code B1900 related to a short in the front pretensioner squib right circuit in my Lexus?

Diagnosis typically involves using an OBDII scanner to read the code, inspecting the wiring and connections in the circuit, testing the pretensioner squib, and checking the airbag control module.

4. Is it safe to drive my Lexus with the OBDII code B1900 indicating a short in the front pretensioner squib right circuit?

It is not recommended to drive the vehicle with this code present, as it can affect the proper function of the airbag system in the event of a collision.

5. Can I reset the OBDII code B1900 in my Lexus related to a short in the front pretensioner squib right circuit?

While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the fault code to prevent it from reoccurring.

6. What are some repair tips for fixing the OBDII code B1900 indicating a short in the front pretensioner squib right circuit in a Lexus?

Repair tips may include checking and repairing any damaged wiring, replacing the faulty pretensioner squib, ensuring all connections are secure, and resetting the airbag system.

7. How much does it typically cost to repair the OBDII code B1900 related to a short in the front pretensioner squib right circuit in a Lexus?

The cost of repair can vary depending on the specific issue causing the fault code, but it may involve parts and labor expenses that could range from a few hundred to over a thousand dollars.

8. Can I fix the OBDII code B1900 indicating a short in the front pretensioner squib right circuit in my Lexus myself?

While some DIY enthusiasts may attempt to address the issue, working on the airbag system can be complex and dangerous. It is recommended to seek professional help for proper diagnosis and repair.

9. Will the OBDII code B1900 in my Lexus reset itself after the issue is fixed?

In some cases, once the underlying problem causing the fault code is resolved, the code may clear on its own after a certain number of successful drive cycles.

10. How important is it to address the OBDII code B1900 indicating a short in the front pretensioner squib right circuit in a Lexus promptly?

It is crucial to address this code promptly to ensure the proper functioning of the airbag system, which is essential for occupant safety in the event of a collision.