AutoCodes – Lexus – B1943 Lexus

B1943 Lexus Code - Short to Positive in Selectable Force Limiter Squib Right Circuit

Quick Answer

The Selectable Force Limiter 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) (Selectable Force Limiter 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: B1943 Lexus indicates Short to Positive in Selectable Force Limiter Squib Right Circuit.
Common causes: Common causes include Faulty Front Seat Outer Belt Assembly Right (RH) (Selectable Force Limiter 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 205

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 B1943 Lexus Description

The Selectable Force Limiter 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 Selectable Force Limiter Squib Right Circuit.

OBDII Code B1943 Lexus - Short to Positive in Selectable Force Limiter Squib Right Circuit - AutoCodes.com — B1943 Lexus Code - Short to Positive in Selectable Force Limiter Squib Right Circuit

What does this mean?

What are the Possible Causes of the DTC B1943 Lexus?

Faulty Front Seat Outer Belt Assembly Right (RH) (Selectable Force Limiter 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 B1943 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 B1943 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 B1943 Lexus code?

Need more information on how to fix the B1943 Lexus code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1943 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 B1943 Lexus Code

1. What are the common symptoms of OBDII code B1943 in a Lexus related to the Short to Positive in Selectable Force Limiter Squib Right Circuit?

The common symptoms include the airbag warning light staying illuminated on the dashboard and potential issues with the airbag system not deploying correctly in the event of a collision.

2. What could cause the OBDII code B1943 in a Lexus indicating a Short to Positive in Selectable Force Limiter Squib Right Circuit?

This code is typically triggered by a short circuit to the positive side in the selectable force limiter squib circuit on the right side of the vehicle's airbag system.

3. How can I diagnose the OBDII code B1943 in a Lexus related to the Short to Positive in Selectable Force Limiter Squib Right Circuit?

Diagnosing this code usually involves using a diagnostic scan tool to retrieve the specific fault code, inspecting the wiring and connectors in the airbag system, and testing the components for proper operation.

4. What are the potential risks of ignoring the OBDII code B1943 in a Lexus indicating a Short to Positive in Selectable Force Limiter Squib Right Circuit?

Ignoring this fault code can compromise the effectiveness of the airbag system, potentially putting occupants at risk in the event of a collision where airbag deployment is necessary.

5. Can I repair the OBDII code B1943 in a Lexus related to the Short to Positive in Selectable Force Limiter Squib Right Circuit myself?

While some basic troubleshooting steps can be performed by DIY enthusiasts, it is recommended to have this issue addressed by a qualified mechanic or technician familiar with airbag system repairs to ensure proper diagnosis and repair.

6. How much does it typically cost to repair the OBDII code B1943 in a Lexus indicating a Short to Positive in Selectable Force Limiter Squib Right Circuit?

The cost of repair can vary depending on the extent of the damage and the specific components that need to be replaced, but it is advisable to budget for potential airbag system repairs when dealing with this fault code.

7. Are there any preventive maintenance tips to avoid encountering the OBDII code B1943 in a Lexus related to the Short to Positive in Selectable Force Limiter Squib Right Circuit?

Regularly inspecting the airbag system components, ensuring proper wire harness routing, and addressing any warning lights or issues promptly can help prevent issues like B1943 from occurring.

8. Is it safe to drive my Lexus with the OBDII code B1943 indicating a Short to Positive in Selectable Force Limiter Squib Right Circuit?

It is not recommended to drive the vehicle with unresolved airbag system issues, as the safety of occupants could be compromised in the event of a collision.